| Top | |
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| CairoSurface* | create-surface | Run Last |
| void | from-embedder | Run Last |
| void | moved-to-rect | Run First |
| GdkWindow* | pick-embedded-child | Run Last |
| void | to-embedder | Run Last |
| GdkWindow | |
| enum | GdkWindowType |
| enum | GdkWindowWindowClass |
| enum | GdkWindowHints |
| struct | GdkGeometry |
| enum | GdkGravity |
| enum | GdkAnchorHints |
| enum | GdkWindowEdge |
| enum | GdkWindowTypeHint |
| struct | GdkWindowAttr |
| enum | GdkWindowAttributesType |
| enum | GdkFullscreenMode |
| enum | GdkFilterReturn |
| typedef | GdkXEvent |
| #define | GDK_PARENT_RELATIVE |
| enum | GdkModifierType |
| enum | GdkModifierIntent |
| enum | GdkWMDecoration |
| enum | GdkWMFunction |
A GdkWindow is a (usually) rectangular region on the screen. It’s a low-level object, used to implement high-level objects such as GtkWidget and GtkWindow on the GTK+ level. A GtkWindow is a toplevel window, the thing a user might think of as a “window” with a titlebar and so on; a GtkWindow may contain many GdkWindows. For example, each GtkButton has a GdkWindow associated with it.
Normally, the windowing system takes care of rendering the contents
of a child window onto its parent window. This mechanism can be
intercepted by calling gdk_window_set_composited() on the child
window. For a “composited” window it is the
responsibility of the application to render the window contents at
the right spot.
Offscreen windows are more general than composited windows, since they allow not only to modify the rendering of the child window onto its parent, but also to apply coordinate transformations.
To integrate an offscreen window into a window hierarchy, one has
to call gdk_offscreen_window_set_embedder() and handle a number of
signals. The “pick-embedded-child” signal on the embedder
window is used to select an offscreen child at given coordinates,
and the “to-embedder” and “from-embedder” signals
on the offscreen window are used to translate coordinates between
the embedder and the offscreen window.
For rendering an offscreen window onto its embedder, the contents
of the offscreen window are available as a surface, via
gdk_offscreen_window_get_surface().
GdkWindow * gdk_window_new (GdkWindow *parent,GdkWindowAttr *attributes,gint attributes_mask);
Creates a new GdkWindow using the attributes from
attributes
. See GdkWindowAttr and GdkWindowAttributesType for
more details. Note: to use this on displays other than the default
display, parent
must be specified.
[constructor]
void
gdk_window_destroy (GdkWindow *window);
Destroys the window system resources associated with window
and decrements window
's
reference count. The window system resources for all children of window
are also
destroyed, but the children’s reference counts are not decremented.
Note that a window will not be destroyed automatically when its reference count reaches zero. You must call this function yourself before that happens.
GdkWindowType
gdk_window_get_window_type (GdkWindow *window);
Gets the type of the window. See GdkWindowType.
GdkDisplay *
gdk_window_get_display (GdkWindow *window);
Gets the GdkDisplay associated with a GdkWindow.
Since: 2.24
GdkScreen *
gdk_window_get_screen (GdkWindow *window);
Gets the GdkScreen associated with a GdkWindow.
Since: 2.24
GdkVisual *
gdk_window_get_visual (GdkWindow *window);
Gets the GdkVisual describing the pixel format of window
.
Since: 2.24
GdkWindow * gdk_window_at_pointer (gint *win_x,gint *win_y);
gdk_window_at_pointer has been deprecated since version 3.0 and should not be used in newly-written code.
Use gdk_device_get_window_at_position() instead.
Obtains the window underneath the mouse pointer, returning the
location of that window in win_x
, win_y
. Returns NULL if the
window under the mouse pointer is not known to GDK (if the window
belongs to another application and a GdkWindow hasn’t been created
for it with gdk_window_foreign_new())
NOTE: For multihead-aware widgets or applications use
gdk_display_get_window_at_pointer() instead.
void
gdk_window_show (GdkWindow *window);
Like gdk_window_show_unraised(), but also raises the window to the
top of the window stack (moves the window to the front of the
Z-order).
This function maps a window so it’s visible onscreen. Its opposite
is gdk_window_hide().
When implementing a GtkWidget, you should call this function on the widget's GdkWindow as part of the “map” method.
void
gdk_window_show_unraised (GdkWindow *window);
Shows a GdkWindow onscreen, but does not modify its stacking
order. In contrast, gdk_window_show() will raise the window
to the top of the window stack.
On the X11 platform, in Xlib terms, this function calls
XMapWindow() (it also updates some internal GDK state, which means
that you can’t really use XMapWindow() directly on a GDK window).
void
gdk_window_hide (GdkWindow *window);
For toplevel windows, withdraws them, so they will no longer be
known to the window manager; for all windows, unmaps them, so
they won’t be displayed. Normally done automatically as
part of gtk_widget_hide().
gboolean
gdk_window_is_destroyed (GdkWindow *window);
Check to see if a window is destroyed..
Since: 2.18
gboolean
gdk_window_is_visible (GdkWindow *window);
Checks whether the window has been mapped (with gdk_window_show() or
gdk_window_show_unraised()).
gboolean
gdk_window_is_viewable (GdkWindow *window);
Check if the window and all ancestors of the window are mapped. (This is not necessarily "viewable" in the X sense, since we only check as far as we have GDK window parents, not to the root window.)
gboolean
gdk_window_is_input_only (GdkWindow *window);
Determines whether or not the window is an input only window.
Since: 2.22
gboolean
gdk_window_is_shaped (GdkWindow *window);
Determines whether or not the window is shaped.
Since: 2.22
GdkWindowState
gdk_window_get_state (GdkWindow *window);
Gets the bitwise OR of the currently active window state flags, from the GdkWindowState enumeration.
void
gdk_window_withdraw (GdkWindow *window);
Withdraws a window (unmaps it and asks the window manager to forget about it).
This function is not really useful as gdk_window_hide() automatically
withdraws toplevel windows before hiding them.
void
gdk_window_iconify (GdkWindow *window);
Asks to iconify (minimize) window
. The window manager may choose
to ignore the request, but normally will honor it. Using
gtk_window_iconify() is preferred, if you have a GtkWindow widget.
This function only makes sense when window
is a toplevel window.
void
gdk_window_deiconify (GdkWindow *window);
Attempt to deiconify (unminimize) window
. On X11 the window manager may
choose to ignore the request to deiconify. When using GTK+,
use gtk_window_deiconify() instead of the GdkWindow variant. Or better yet,
you probably want to use gtk_window_present_with_time(), which raises the window, focuses it,
unminimizes it, and puts it on the current desktop.
void
gdk_window_stick (GdkWindow *window);
“Pins” a window such that it’s on all workspaces and does not scroll
with viewports, for window managers that have scrollable viewports.
(When using GtkWindow, gtk_window_stick() may be more useful.)
On the X11 platform, this function depends on window manager support, so may have no effect with many window managers. However, GDK will do the best it can to convince the window manager to stick the window. For window managers that don’t support this operation, there’s nothing you can do to force it to happen.
void
gdk_window_unstick (GdkWindow *window);
Reverse operation for gdk_window_stick(); see gdk_window_stick(),
and gtk_window_unstick().
void
gdk_window_maximize (GdkWindow *window);
Maximizes the window. If the window was already maximized, then this function does nothing.
On X11, asks the window manager to maximize window
, if the window
manager supports this operation. Not all window managers support
this, and some deliberately ignore it or don’t have a concept of
“maximized”; so you can’t rely on the maximization actually
happening. But it will happen with most standard window managers,
and GDK makes a best effort to get it to happen.
On Windows, reliably maximizes the window.
void
gdk_window_unmaximize (GdkWindow *window);
Unmaximizes the window. If the window wasn’t maximized, then this function does nothing.
On X11, asks the window manager to unmaximize window
, if the
window manager supports this operation. Not all window managers
support this, and some deliberately ignore it or don’t have a
concept of “maximized”; so you can’t rely on the unmaximization
actually happening. But it will happen with most standard window
managers, and GDK makes a best effort to get it to happen.
On Windows, reliably unmaximizes the window.
void
gdk_window_fullscreen (GdkWindow *window);
Moves the window into fullscreen mode. This means the window covers the entire screen and is above any panels or task bars.
If the window was already fullscreen, then this function does nothing.
On X11, asks the window manager to put window
in a fullscreen
state, if the window manager supports this operation. Not all
window managers support this, and some deliberately ignore it or
don’t have a concept of “fullscreen”; so you can’t rely on the
fullscreenification actually happening. But it will happen with
most standard window managers, and GDK makes a best effort to get
it to happen.
Since: 2.2
void gdk_window_fullscreen_on_monitor (GdkWindow *window,gint monitor);
Moves the window into fullscreen mode on the given monitor. This means the window covers the entire screen and is above any panels or task bars.
If the window was already fullscreen, then this function does nothing.
Since: UNRELEASED
void
gdk_window_unfullscreen (GdkWindow *window);
Moves the window out of fullscreen mode. If the window was not fullscreen, does nothing.
On X11, asks the window manager to move window
out of the fullscreen
state, if the window manager supports this operation. Not all
window managers support this, and some deliberately ignore it or
don’t have a concept of “fullscreen”; so you can’t rely on the
unfullscreenification actually happening. But it will happen with
most standard window managers, and GDK makes a best effort to get
it to happen.
Since: 2.2
GdkFullscreenMode
gdk_window_get_fullscreen_mode (GdkWindow *window);
Obtains the GdkFullscreenMode of the window
.
Since: 3.8
void gdk_window_set_fullscreen_mode (GdkWindow *window,GdkFullscreenMode mode);
Specifies whether the window
should span over all monitors (in a multi-head
setup) or only the current monitor when in fullscreen mode.
The mode
argument is from the GdkFullscreenMode enumeration.
If GDK_FULLSCREEN_ON_ALL_MONITORS is specified, the fullscreen window
will
span over all monitors from the GdkScreen.
On X11, searches through the list of monitors from the GdkScreen the ones
which delimit the 4 edges of the entire GdkScreen and will ask the window
manager to span the window
over these monitors.
If the XINERAMA extension is not available or not usable, this function has no effect.
Not all window managers support this, so you can’t rely on the fullscreen window to span over the multiple monitors when GDK_FULLSCREEN_ON_ALL_MONITORS is specified.
Since: 3.8
void gdk_window_set_keep_above (GdkWindow *window,gboolean setting);
Set if window
must be kept above other windows. If the
window was already above, then this function does nothing.
On X11, asks the window manager to keep window
above, if the window
manager supports this operation. Not all window managers support
this, and some deliberately ignore it or don’t have a concept of
“keep above”; so you can’t rely on the window being kept above.
But it will happen with most standard window managers,
and GDK makes a best effort to get it to happen.
Since: 2.4
void gdk_window_set_keep_below (GdkWindow *window,gboolean setting);
Set if window
must be kept below other windows. If the
window was already below, then this function does nothing.
On X11, asks the window manager to keep window
below, if the window
manager supports this operation. Not all window managers support
this, and some deliberately ignore it or don’t have a concept of
“keep below”; so you can’t rely on the window being kept below.
But it will happen with most standard window managers,
and GDK makes a best effort to get it to happen.
Since: 2.4
void gdk_window_set_opacity (GdkWindow *window,gdouble opacity);
Set window
to render as partially transparent,
with opacity 0 being fully transparent and 1 fully opaque. (Values
of the opacity parameter are clamped to the [0,1] range.)
For toplevel windows this depends on support from the windowing system
that may not always be there. For instance, On X11, this works only on
X screens with a compositing manager running. On Wayland, there is no
per-window opacity value that the compositor would apply. Instead, use
gdk_window_set_opaque_region (window, NULL) to tell the compositor
that the entire window is (potentially) non-opaque, and draw your content
with alpha, or use gtk_widget_set_opacity() to set an overall opacity
for your widgets.
For child windows this function only works for non-native windows.
For setting up per-pixel alpha topelevels, see gdk_screen_get_rgba_visual(),
and for non-toplevels, see gdk_window_set_composited().
Support for non-toplevel windows was added in 3.8.
Since: 2.12
void gdk_window_set_composited (GdkWindow *window,gboolean composited);
gdk_window_set_composited has been deprecated since version 3.16 and should not be used in newly-written code.
Compositing is an outdated technology that only ever worked on X11.
Sets a GdkWindow as composited, or unsets it. Composited windows do not automatically have their contents drawn to the screen. Drawing is redirected to an offscreen buffer and an expose event is emitted on the parent of the composited window. It is the responsibility of the parent’s expose handler to manually merge the off-screen content onto the screen in whatever way it sees fit.
It only makes sense for child windows to be composited; see
gdk_window_set_opacity() if you need translucent toplevel
windows.
An additional effect of this call is that the area of this window is no longer clipped from regions marked for invalidation on its parent. Draws done on the parent window are also no longer clipped by the child.
This call is only supported on some systems (currently,
only X11 with new enough Xcomposite and Xdamage extensions).
You must call gdk_display_supports_composite() to check if
setting a window as composited is supported before
attempting to do so.
Since: 2.12
gboolean
gdk_window_get_composited (GdkWindow *window);
gdk_window_get_composited has been deprecated since version 3.16 and should not be used in newly-written code.
Compositing is an outdated technology that only ever worked on X11.
Determines whether window
is composited.
See gdk_window_set_composited().
Since: 2.22
void gdk_window_set_pass_through (GdkWindow *window,gboolean pass_through);
Sets whether input to the window is passed through to the window below.
The default value of this is FALSE, which means that pointer
events that happen inside the window are send first to the window,
but if the event is not selected by the event mask then the event
is sent to the parent window, and so on up the hierarchy.
If pass_through
is TRUE then such pointer events happen as if the
window wasn't there at all, and thus will be sent first to any
windows below window
. This is useful if the window is used in a
transparent fashion. In the terminology of the web this would be called
"pointer-events: none".
Note that a window with pass_through
TRUE can still have a subwindow
without pass through, so you can get events on a subset of a window. And in
that cases you would get the in-between related events such as the pointer
enter/leave events on its way to the destination window.
Since: 3.18
gboolean
gdk_window_get_pass_through (GdkWindow *window);
Returns whether input to the window is passed through to the window below.
See gdk_window_set_pass_through() for details
Since: 3.18
void gdk_window_move (GdkWindow *window,gint x,gint y);
Repositions a window relative to its parent window.
For toplevel windows, window managers may ignore or modify the move;
you should probably use gtk_window_move() on a GtkWindow widget
anyway, instead of using GDK functions. For child windows,
the move will reliably succeed.
If you’re also planning to resize the window, use gdk_window_move_resize()
to both move and resize simultaneously, for a nicer visual effect.
void gdk_window_resize (GdkWindow *window,gint width,gint height);
Resizes window
; for toplevel windows, asks the window manager to resize
the window. The window manager may not allow the resize. When using GTK+,
use gtk_window_resize() instead of this low-level GDK function.
Windows may not be resized below 1x1.
If you’re also planning to move the window, use gdk_window_move_resize()
to both move and resize simultaneously, for a nicer visual effect.
void gdk_window_move_resize (GdkWindow *window,gint x,gint y,gint width,gint height);
Equivalent to calling gdk_window_move() and gdk_window_resize(),
except that both operations are performed at once, avoiding strange
visual effects. (i.e. the user may be able to see the window first
move, then resize, if you don’t use gdk_window_move_resize().)
void gdk_window_scroll (GdkWindow *window,gint dx,gint dy);
Scroll the contents of window
, both pixels and children, by the
given amount. window
itself does not move. Portions of the window
that the scroll operation brings in from offscreen areas are
invalidated. The invalidated region may be bigger than what would
strictly be necessary.
For X11, a minimum area will be invalidated if the window has no subwindows, or if the edges of the window’s parent do not extend beyond the edges of the window. In other cases, a multi-step process is used to scroll the window which may produce temporary visual artifacts and unnecessary invalidations.
void gdk_window_move_to_rect (GdkWindow *window,const GdkRectangle *rect,GdkGravity rect_anchor,GdkGravity window_anchor,GdkAnchorHints anchor_hints,gint rect_anchor_dx,gint rect_anchor_dy);
Moves window
to rect
, aligning their anchor points.
rect
is relative to the top-left corner of the window that window
is
transient for. rect_anchor
and window_anchor
determine anchor points on
rect
and window
to pin together. rect
's anchor point can optionally be
offset by rect_anchor_dx
and rect_anchor_dy
, which is equivalent to
offsetting the position of window
.
anchor_hints
determines how window
will be moved if the anchor points cause
it to move off-screen. For example, GDK_ANCHOR_FLIP_X will replace
GDK_GRAVITY_NORTH_WEST with GDK_GRAVITY_NORTH_EAST and vice versa if
window
extends beyond the left or right edges of the monitor.
Connect to the “moved-to-rect” signal to find out how it was actually positioned.
window |
the GdkWindow to move |
|
rect |
the destination GdkRectangle to align |
[not nullable] |
rect_anchor |
the point on |
|
window_anchor |
the point on |
|
anchor_hints |
positioning hints to use when limited on space |
|
rect_anchor_dx |
horizontal offset to shift |
|
rect_anchor_dy |
vertical offset to shift |
Since: 3.24
void gdk_window_move_region (GdkWindow *window,const cairo_region_t *region,gint dx,gint dy);
Move the part of window
indicated by region
by dy
pixels in the Y
direction and dx
pixels in the X direction. The portions of region
that not covered by the new position of region
are invalidated.
Child windows are not moved.
window |
||
region |
The cairo_region_t to move |
|
dx |
Amount to move in the X direction |
|
dy |
Amount to move in the Y direction |
Since: 2.8
void
gdk_window_flush (GdkWindow *window);
gdk_window_flush has been deprecated since version 3.14 and should not be used in newly-written code.
This function does nothing.
Since: 2.18
gboolean
gdk_window_has_native (GdkWindow *window);
Checks whether the window has a native window or not. Note that
you can use gdk_window_ensure_native() if a native window is needed.
Since: 2.22
gboolean
gdk_window_ensure_native (GdkWindow *window);
Tries to ensure that there is a window-system native window for this
GdkWindow. This may fail in some situations, returning FALSE.
Offscreen window and children of them can never have native windows.
Some backends may not support native child windows.
Since: 2.18
void gdk_window_reparent (GdkWindow *window,GdkWindow *new_parent,gint x,gint y);
Reparents window
into the given new_parent
. The window being
reparented will be unmapped as a side effect.
void
gdk_window_raise (GdkWindow *window);
Raises window
to the top of the Z-order (stacking order), so that
other windows with the same parent window appear below window
.
This is true whether or not the windows are visible.
If window
is a toplevel, the window manager may choose to deny the
request to move the window in the Z-order, gdk_window_raise() only
requests the restack, does not guarantee it.
void
gdk_window_lower (GdkWindow *window);
Lowers window
to the bottom of the Z-order (stacking order), so that
other windows with the same parent window appear above window
.
This is true whether or not the other windows are visible.
If window
is a toplevel, the window manager may choose to deny the
request to move the window in the Z-order, gdk_window_lower() only
requests the restack, does not guarantee it.
Note that gdk_window_show() raises the window again, so don’t call this
function before gdk_window_show(). (Try gdk_window_show_unraised().)
void gdk_window_restack (GdkWindow *window,GdkWindow *sibling,gboolean above);
Changes the position of window
in the Z-order (stacking order), so that
it is above sibling
(if above
is TRUE) or below sibling
(if above
is
FALSE).
If sibling
is NULL, then this either raises (if above
is TRUE) or
lowers the window.
If window
is a toplevel, the window manager may choose to deny the
request to move the window in the Z-order, gdk_window_restack() only
requests the restack, does not guarantee it.
Since: 2.18
void gdk_window_focus (GdkWindow *window,guint32 timestamp);
Sets keyboard focus to window
. In most cases, gtk_window_present_with_time()
should be used on a GtkWindow, rather than calling this function.
void
gdk_window_register_dnd (GdkWindow *window);
Registers a window as a potential drop destination.
void gdk_window_begin_resize_drag (GdkWindow *window,GdkWindowEdge edge,gint button,gint root_x,gint root_y,guint32 timestamp);
Begins a window resize operation (for a toplevel window).
This function assumes that the drag is controlled by the
client pointer device, use gdk_window_begin_resize_drag_for_device()
to begin a drag with a different device.
window |
a toplevel GdkWindow |
|
edge |
the edge or corner from which the drag is started |
|
button |
the button being used to drag, or 0 for a keyboard-initiated drag |
|
root_x |
root window X coordinate of mouse click that began the drag |
|
root_y |
root window Y coordinate of mouse click that began the drag |
|
timestamp |
timestamp of mouse click that began the drag (use |
void gdk_window_begin_resize_drag_for_device (GdkWindow *window,GdkWindowEdge edge,GdkDevice *device,gint button,gint root_x,gint root_y,guint32 timestamp);
Begins a window resize operation (for a toplevel window). You might use this function to implement a “window resize grip,” for example; in fact GtkStatusbar uses it. The function works best with window managers that support the Extended Window Manager Hints but has a fallback implementation for other window managers.
window |
a toplevel GdkWindow |
|
edge |
the edge or corner from which the drag is started |
|
device |
the device used for the operation |
|
button |
the button being used to drag, or 0 for a keyboard-initiated drag |
|
root_x |
root window X coordinate of mouse click that began the drag |
|
root_y |
root window Y coordinate of mouse click that began the drag |
|
timestamp |
timestamp of mouse click that began the drag (use |
Since: 3.4
void gdk_window_begin_move_drag (GdkWindow *window,gint button,gint root_x,gint root_y,guint32 timestamp);
Begins a window move operation (for a toplevel window).
This function assumes that the drag is controlled by the
client pointer device, use gdk_window_begin_move_drag_for_device()
to begin a drag with a different device.
window |
a toplevel GdkWindow |
|
button |
the button being used to drag, or 0 for a keyboard-initiated drag |
|
root_x |
root window X coordinate of mouse click that began the drag |
|
root_y |
root window Y coordinate of mouse click that began the drag |
|
timestamp |
timestamp of mouse click that began the drag |
void gdk_window_begin_move_drag_for_device (GdkWindow *window,GdkDevice *device,gint button,gint root_x,gint root_y,guint32 timestamp);
Begins a window move operation (for a toplevel window). You might use this function to implement a “window move grip,” for example. The function works best with window managers that support the Extended Window Manager Hints but has a fallback implementation for other window managers.
window |
a toplevel GdkWindow |
|
device |
the device used for the operation |
|
button |
the button being used to drag, or 0 for a keyboard-initiated drag |
|
root_x |
root window X coordinate of mouse click that began the drag |
|
root_y |
root window Y coordinate of mouse click that began the drag |
|
timestamp |
timestamp of mouse click that began the drag |
Since: 3.4
gboolean gdk_window_show_window_menu (GdkWindow *window,GdkEvent *event);
Asks the windowing system to show the window menu. The window menu is the menu shown when right-clicking the titlebar on traditional windows managed by the window manager. This is useful for windows using client-side decorations, activating it with a right-click on the window decorations.
Since: 3.14
void gdk_window_constrain_size (GdkGeometry *geometry,GdkWindowHints flags,gint width,gint height,gint *new_width,gint *new_height);
Constrains a desired width and height according to a set of geometry hints (such as minimum and maximum size).
geometry |
a GdkGeometry structure |
|
flags |
a mask indicating what portions of |
|
width |
desired width of window |
|
height |
desired height of the window |
|
new_width |
location to store resulting width. |
[out] |
new_height |
location to store resulting height. |
[out] |
void
gdk_window_beep (GdkWindow *window);
Emits a short beep associated to window
in the appropriate
display, if supported. Otherwise, emits a short beep on
the display just as gdk_display_beep().
Since: 2.12
gint
gdk_window_get_scale_factor (GdkWindow *window);
Returns the internal scale factor that maps from window coordiantes to the actual device pixels. On traditional systems this is 1, but on very high density outputs this can be a higher value (often 2).
A higher value means that drawing is automatically scaled up to a higher resolution, so any code doing drawing will automatically look nicer. However, if you are supplying pixel-based data the scale value can be used to determine whether to use a pixel resource with higher resolution data.
The scale of a window may change during runtime, if this happens a configure event will be sent to the toplevel window.
Since: 3.10
void gdk_window_set_opaque_region (GdkWindow *window,cairo_region_t *region);
For optimisation purposes, compositing window managers may like to not draw obscured regions of windows, or turn off blending during for these regions. With RGB windows with no transparency, this is just the shape of the window, but with ARGB32 windows, the compositor does not know what regions of the window are transparent or not.
This function only works for toplevel windows.
GTK+ will update this property automatically if
the window
background is opaque, as we know where the opaque regions
are. If your window background is not opaque, please update this
property in your “style-updated” handler.
Since: 3.10
GdkGLContext * gdk_window_create_gl_context (GdkWindow *window,GError **error);
Creates a new GdkGLContext matching the framebuffer format to the visual of the GdkWindow. The context is disconnected from any particular window or surface.
If the creation of the GdkGLContext failed, error
will be set.
Before using the returned GdkGLContext, you will need to
call gdk_gl_context_make_current() or gdk_gl_context_realize().
Since: 3.16
void gdk_window_mark_paint_from_clip (GdkWindow *window,cairo_t *cr);
If you call this during a paint (e.g. between gdk_window_begin_paint_region()
and gdk_window_end_paint() then GDK will mark the current clip region of the
window as being drawn. This is required when mixing GL rendering via
gdk_cairo_draw_from_gl() and cairo rendering, as otherwise GDK has no way
of knowing when something paints over the GL-drawn regions.
This is typically called automatically by GTK+ and you don't need to care about this.
Since: 3.16
cairo_region_t *
gdk_window_get_clip_region (GdkWindow *window);
Computes the region of a window that potentially can be written to by drawing primitives. This region may not take into account other factors such as if the window is obscured by other windows, but no area outside of this region will be affected by drawing primitives.
void gdk_window_begin_paint_rect (GdkWindow *window,const GdkRectangle *rectangle);
gdk_window_begin_paint_rect has been deprecated since version 3.22 and should not be used in newly-written code.
Use gdk_window_begin_draw_frame() instead
A convenience wrapper around gdk_window_begin_paint_region() which
creates a rectangular region for you. See
gdk_window_begin_paint_region() for details.
void gdk_window_begin_paint_region (GdkWindow *window,const cairo_region_t *region);
gdk_window_begin_paint_region has been deprecated since version 3.22 and should not be used in newly-written code.
Use gdk_window_begin_draw_frame() instead
Indicates that you are beginning the process of redrawing region
.
A backing store (offscreen buffer) large enough to contain region
will be created. The backing store will be initialized with the
background color or background surface for window
. Then, all
drawing operations performed on window
will be diverted to the
backing store. When you call gdk_window_end_paint(), the backing
store will be copied to window
, making it visible onscreen. Only
the part of window
contained in region
will be modified; that is,
drawing operations are clipped to region
.
The net result of all this is to remove flicker, because the user
sees the finished product appear all at once when you call
gdk_window_end_paint(). If you draw to window
directly without
calling gdk_window_begin_paint_region(), the user may see flicker
as individual drawing operations are performed in sequence. The
clipping and background-initializing features of
gdk_window_begin_paint_region() are conveniences for the
programmer, so you can avoid doing that work yourself.
When using GTK+, the widget system automatically places calls to
gdk_window_begin_paint_region() and gdk_window_end_paint() around
emissions of the expose_event signal. That is, if you’re writing an
expose event handler, you can assume that the exposed area in
GdkEventExpose has already been cleared to the window background,
is already set as the clip region, and already has a backing store.
Therefore in most cases, application code need not call
gdk_window_begin_paint_region(). (You can disable the automatic
calls around expose events on a widget-by-widget basis by calling
gtk_widget_set_double_buffered().)
If you call this function multiple times before calling the
matching gdk_window_end_paint(), the backing stores are pushed onto
a stack. gdk_window_end_paint() copies the topmost backing store
onscreen, subtracts the topmost region from all other regions in
the stack, and pops the stack. All drawing operations affect only
the topmost backing store in the stack. One matching call to
gdk_window_end_paint() is required for each call to
gdk_window_begin_paint_region().
void
gdk_window_end_paint (GdkWindow *window);
gdk_window_end_paint is deprecated and should not be used in newly-written code.
Indicates that the backing store created by the most recent call
to gdk_window_begin_paint_region() should be copied onscreen and
deleted, leaving the next-most-recent backing store or no backing
store at all as the active paint region. See
gdk_window_begin_paint_region() for full details.
It is an error to call this function without a matching
gdk_window_begin_paint_region() first.
GdkDrawingContext * gdk_window_begin_draw_frame (GdkWindow *window,const cairo_region_t *region);
Indicates that you are beginning the process of redrawing region
on window
, and provides you with a GdkDrawingContext.
If window
is a top level GdkWindow, backed by a native window
implementation, a backing store (offscreen buffer) large enough to
contain region
will be created. The backing store will be initialized
with the background color or background surface for window
. Then, all
drawing operations performed on window
will be diverted to the
backing store. When you call gdk_window_end_frame(), the contents of
the backing store will be copied to window
, making it visible
on screen. Only the part of window
contained in region
will be
modified; that is, drawing operations are clipped to region
.
The net result of all this is to remove flicker, because the user
sees the finished product appear all at once when you call
gdk_window_end_draw_frame(). If you draw to window
directly without
calling gdk_window_begin_draw_frame(), the user may see flicker
as individual drawing operations are performed in sequence.
When using GTK+, the widget system automatically places calls to
gdk_window_begin_draw_frame() and gdk_window_end_draw_frame() around
emissions of the GtkWidget::draw signal. That is, if you’re
drawing the contents of the widget yourself, you can assume that the
widget has a cleared background, is already set as the clip region,
and already has a backing store. Therefore in most cases, application
code in GTK does not need to call gdk_window_begin_draw_frame()
explicitly.
a GdkDrawingContext context that should be used to draw the contents of the window; the returned context is owned by GDK.
[transfer none]
Since: 3.22
void gdk_window_end_draw_frame (GdkWindow *window,GdkDrawingContext *context);
Indicates that the drawing of the contents of window
started with
gdk_window_begin_frame() has been completed.
This function will take care of destroying the GdkDrawingContext.
It is an error to call this function without a matching
gdk_window_begin_frame() first.
Since: 3.22
cairo_region_t *
gdk_window_get_visible_region (GdkWindow *window);
Computes the region of the window
that is potentially visible.
This does not necessarily take into account if the window is
obscured by other windows, but no area outside of this region
is visible.
void (*GdkWindowInvalidateHandlerFunc) (GdkWindow *window,cairo_region_t *region);
Whenever some area of the window is invalidated (directly in the
window or in a child window) this gets called with region
in
the coordinate space of window
. You can use region
to just
keep track of the dirty region, or you can actually change
region
in case you are doing display tricks like showing
a child in multiple places.
Since: 3.10
void gdk_window_set_invalidate_handler (GdkWindow *window,GdkWindowInvalidateHandlerFunc handler);
Registers an invalidate handler for a specific window. This will get called whenever a region in the window or its children is invalidated.
This can be used to record the invalidated region, which is useful if you are keeping an offscreen copy of some region and want to keep it up to date. You can also modify the invalidated region in case you’re doing some effect where e.g. a child widget appears in multiple places.
[skip]
Since: 3.10
void gdk_window_invalidate_rect (GdkWindow *window,const GdkRectangle *rect,gboolean invalidate_children);
A convenience wrapper around gdk_window_invalidate_region() which
invalidates a rectangular region. See
gdk_window_invalidate_region() for details.
void gdk_window_invalidate_region (GdkWindow *window,const cairo_region_t *region,gboolean invalidate_children);
Adds region
to the update area for window
. The update area is the
region that needs to be redrawn, or “dirty region.” The call
gdk_window_process_updates() sends one or more expose events to the
window, which together cover the entire update area. An
application would normally redraw the contents of window
in
response to those expose events.
GDK will call gdk_window_process_all_updates() on your behalf
whenever your program returns to the main loop and becomes idle, so
normally there’s no need to do that manually, you just need to
invalidate regions that you know should be redrawn.
The invalidate_children
parameter controls whether the region of
each child window that intersects region
will also be invalidated.
If FALSE, then the update area for child windows will remain
unaffected. See gdk_window_invalidate_maybe_recurse if you need
fine grained control over which children are invalidated.
gboolean (*GdkWindowChildFunc) (GdkWindow *window,gpointer user_data);
A function of this type is passed to gdk_window_invalidate_maybe_recurse().
It gets called for each child of the window to determine whether to
recursively invalidate it or now.
void gdk_window_invalidate_maybe_recurse (GdkWindow *window,const cairo_region_t *region,GdkWindowChildFunc child_func,gpointer user_data);
Adds region
to the update area for window
. The update area is the
region that needs to be redrawn, or “dirty region.” The call
gdk_window_process_updates() sends one or more expose events to the
window, which together cover the entire update area. An
application would normally redraw the contents of window
in
response to those expose events.
GDK will call gdk_window_process_all_updates() on your behalf
whenever your program returns to the main loop and becomes idle, so
normally there’s no need to do that manually, you just need to
invalidate regions that you know should be redrawn.
The child_func
parameter controls whether the region of
each child window that intersects region
will also be invalidated.
Only children for which child_func
returns TRUE will have the area
invalidated.
window |
||
region |
||
child_func |
function to use to decide if to
recurse to a child, |
[scope call][allow-none] |
user_data |
data passed to |
cairo_region_t *
gdk_window_get_update_area (GdkWindow *window);
Transfers ownership of the update area from window
to the caller
of the function. That is, after calling this function, window
will
no longer have an invalid/dirty region; the update area is removed
from window
and handed to you. If a window has no update area,
gdk_window_get_update_area() returns NULL. You are responsible for
calling cairo_region_destroy() on the returned region if it’s non-NULL.
void
gdk_window_freeze_updates (GdkWindow *window);
Temporarily freezes a window such that it won’t receive expose
events. The window will begin receiving expose events again when
gdk_window_thaw_updates() is called. If gdk_window_freeze_updates()
has been called more than once, gdk_window_thaw_updates() must be called
an equal number of times to begin processing exposes.
void
gdk_window_thaw_updates (GdkWindow *window);
Thaws a window frozen with gdk_window_freeze_updates().
void
gdk_window_process_all_updates (void);
gdk_window_process_all_updates has been deprecated since version 3.22 and should not be used in newly-written code.
Calls gdk_window_process_updates() for all windows (see GdkWindow)
in the application.
void gdk_window_process_updates (GdkWindow *window,gboolean update_children);
gdk_window_process_updates has been deprecated since version 3.22 and should not be used in newly-written code.
Sends one or more expose events to window
. The areas in each
expose event will cover the entire update area for the window (see
gdk_window_invalidate_region() for details). Normally GDK calls
gdk_window_process_all_updates() on your behalf, so there’s no
need to call this function unless you want to force expose events
to be delivered immediately and synchronously (vs. the usual
case, where GDK delivers them in an idle handler). Occasionally
this is useful to produce nicer scrolling behavior, for example.
void
gdk_window_set_debug_updates (gboolean setting);
gdk_window_set_debug_updates has been deprecated since version 3.22 and should not be used in newly-written code.
With update debugging enabled, calls to
gdk_window_invalidate_region() clear the invalidated region of the
screen to a noticeable color, and GDK pauses for a short time
before sending exposes to windows during
gdk_window_process_updates(). The net effect is that you can see
the invalid region for each window and watch redraws as they
occur. This allows you to diagnose inefficiencies in your application.
In essence, because the GDK rendering model prevents all flicker, if you are redrawing the same region 400 times you may never notice, aside from noticing a speed problem. Enabling update debugging causes GTK to flicker slowly and noticeably, so you can see exactly what’s being redrawn when, in what order.
The --gtk-debug=updates command line option passed to GTK+ programs
enables this debug option at application startup time. That's
usually more useful than calling gdk_window_set_debug_updates()
yourself, though you might want to use this function to enable
updates sometime after application startup time.
void
gdk_window_enable_synchronized_configure
(GdkWindow *window);
gdk_window_enable_synchronized_configure has been deprecated since version 3.8 and should not be used in newly-written code.
this function is no longer needed
Does nothing, present only for compatiblity.
Since: 2.6
void
gdk_window_configure_finished (GdkWindow *window);
gdk_window_configure_finished has been deprecated since version 3.8 and should not be used in newly-written code.
this function is no longer needed
Does nothing, present only for compatiblity.
Since: 2.6
GdkFrameClock *
gdk_window_get_frame_clock (GdkWindow *window);
Gets the frame clock for the window. The frame clock for a window never changes unless the window is reparented to a new toplevel window.
Since: 3.8
void gdk_window_set_user_data (GdkWindow *window,gpointer user_data);
For most purposes this function is deprecated in favor of
g_object_set_data(). However, for historical reasons GTK+ stores
the GtkWidget that owns a GdkWindow as user data on the
GdkWindow. So, custom widget implementations should use
this function for that. If GTK+ receives an event for a GdkWindow,
and the user data for the window is non-NULL, GTK+ will assume the
user data is a GtkWidget, and forward the event to that widget.
void gdk_window_set_override_redirect (GdkWindow *window,gboolean override_redirect);
An override redirect window is not under the control of the window manager. This means it won’t have a titlebar, won’t be minimizable, etc. - it will be entirely under the control of the application. The window manager can’t see the override redirect window at all.
Override redirect should only be used for short-lived temporary windows, such as popup menus. GtkMenu uses an override redirect window in its implementation, for example.
void gdk_window_set_accept_focus (GdkWindow *window,gboolean accept_focus);
Setting accept_focus
to FALSE hints the desktop environment that the
window doesn’t want to receive input focus.
On X, it is the responsibility of the window manager to interpret this hint. ICCCM-compliant window manager usually respect it.
Since: 2.4
gboolean
gdk_window_get_accept_focus (GdkWindow *window);
Determines whether or not the desktop environment shuld be hinted that the window does not want to receive input focus.
Since: 2.22
void gdk_window_set_focus_on_map (GdkWindow *window,gboolean focus_on_map);
Setting focus_on_map
to FALSE hints the desktop environment that the
window doesn’t want to receive input focus when it is mapped.
focus_on_map should be turned off for windows that aren’t triggered
interactively (such as popups from network activity).
On X, it is the responsibility of the window manager to interpret this hint. Window managers following the freedesktop.org window manager extension specification should respect it.
Since: 2.6
gboolean
gdk_window_get_focus_on_map (GdkWindow *window);
Determines whether or not the desktop environment should be hinted that the window does not want to receive input focus when it is mapped.
Since: 2.22
void gdk_window_add_filter (GdkWindow *window,GdkFilterFunc function,gpointer data);
Adds an event filter to window
, allowing you to intercept events
before they reach GDK. This is a low-level operation and makes it
easy to break GDK and/or GTK+, so you have to know what you're
doing. Pass NULL for window
to get all events for all windows,
instead of events for a specific window.
If you are interested in X GenericEvents, bear in mind that
XGetEventData() has been already called on the event, and
XFreeEventData() must not be called within function
.
[skip]
window |
a GdkWindow. |
[allow-none] |
function |
filter callback |
|
data |
data to pass to filter callback |
void gdk_window_remove_filter (GdkWindow *window,GdkFilterFunc function,gpointer data);
Remove a filter previously added with gdk_window_add_filter().
[skip]
GdkFilterReturn (*GdkFilterFunc) (GdkXEvent *xevent,GdkEvent *event,gpointer data);
Specifies the type of function used to filter native events before they are converted to GDK events.
When a filter is called, event
is unpopulated, except for
event->window. The filter may translate the native
event to a GDK event and store the result in event
, or handle it without
translation. If the filter translates the event and processing should
continue, it should return GDK_FILTER_TRANSLATE.
void gdk_window_shape_combine_region (GdkWindow *window,const cairo_region_t *shape_region,gint offset_x,gint offset_y);
Makes pixels in window
outside shape_region
be transparent,
so that the window may be nonrectangular.
If shape_region
is NULL, the shape will be unset, so the whole
window will be opaque again. offset_x
and offset_y
are ignored
if shape_region
is NULL.
On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.
This function works on both toplevel and child windows.
void
gdk_window_set_child_shapes (GdkWindow *window);
Sets the shape mask of window
to the union of shape masks
for all children of window
, ignoring the shape mask of window
itself. Contrast with gdk_window_merge_child_shapes() which includes
the shape mask of window
in the masks to be merged.
void
gdk_window_merge_child_shapes (GdkWindow *window);
Merges the shape masks for any child windows into the
shape mask for window
. i.e. the union of all masks
for window
and its children will become the new mask
for window
. See gdk_window_shape_combine_region().
This function is distinct from gdk_window_set_child_shapes()
because it includes window
’s shape mask in the set of shapes to
be merged.
void gdk_window_input_shape_combine_region (GdkWindow *window,const cairo_region_t *shape_region,gint offset_x,gint offset_y);
Like gdk_window_shape_combine_region(), but the shape applies
only to event handling. Mouse events which happen while
the pointer position corresponds to an unset bit in the
mask will be passed on the window below window
.
An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is “clickable”.
On the X11 platform, this requires version 1.1 of the shape extension.
On the Win32 platform, this functionality is not present and the function does nothing.
window |
||
shape_region |
region of window to be non-transparent |
|
offset_x |
X position of |
|
offset_y |
Y position of |
Since: 2.10
void
gdk_window_set_child_input_shapes (GdkWindow *window);
Sets the input shape mask of window
to the union of input shape masks
for all children of window
, ignoring the input shape mask of window
itself. Contrast with gdk_window_merge_child_input_shapes() which includes
the input shape mask of window
in the masks to be merged.
Since: 2.10
void
gdk_window_merge_child_input_shapes (GdkWindow *window);
Merges the input shape masks for any child windows into the
input shape mask for window
. i.e. the union of all input masks
for window
and its children will become the new input mask
for window
. See gdk_window_input_shape_combine_region().
This function is distinct from gdk_window_set_child_input_shapes()
because it includes window
’s input shape mask in the set of
shapes to be merged.
Since: 2.10
gboolean gdk_window_set_static_gravities (GdkWindow *window,gboolean use_static);
gdk_window_set_static_gravities has been deprecated since version 3.16 and should not be used in newly-written code.
static gravities haven't worked on anything but X11 for a long time.
Used to set the bit gravity of the given window to static, and flag it so all children get static subwindow gravity. This is used if you are implementing scary features that involve deep knowledge of the windowing system. Don’t worry about it.
void gdk_window_set_title (GdkWindow *window,const gchar *title);
Sets the title of a toplevel window, to be displayed in the titlebar.
If you haven’t explicitly set the icon name for the window
(using gdk_window_set_icon_name()), the icon name will be set to
title
as well. title
must be in UTF-8 encoding (as with all
user-readable strings in GDK/GTK+). title
may not be NULL.
void gdk_window_set_background (GdkWindow *window,const GdkColor *color);
gdk_window_set_background has been deprecated since version 3.4 and should not be used in newly-written code.
Don't use this function
Sets the background color of window
.
However, when using GTK+, influence the background of a widget
using a style class or CSS — if you’re an application — or with
gtk_style_context_set_background() — if you're implementing a
custom widget.
void gdk_window_set_background_rgba (GdkWindow *window,const GdkRGBA *rgba);
gdk_window_set_background_rgba has been deprecated since version 3.22 and should not be used in newly-written code.
Don't use this function
Sets the background color of window
.
See also gdk_window_set_background_pattern().
void gdk_window_set_background_pattern (GdkWindow *window,cairo_pattern_t *pattern);
gdk_window_set_background_pattern has been deprecated since version 3.22 and should not be used in newly-written code.
Don't use this function
Sets the background of window
.
A background of NULL means that the window won't have any background. On the
X11 backend it's also possible to inherit the background from the parent
window using gdk_x11_get_parent_relative_pattern().
The windowing system will normally fill a window with its background when the window is obscured then exposed.
cairo_pattern_t *
gdk_window_get_background_pattern (GdkWindow *window);
gdk_window_get_background_pattern has been deprecated since version 3.22 and should not be used in newly-written code.
Don't use this function
Gets the pattern used to clear the background on window
.
The pattern to use for the
background or NULL if there is no background.
[nullable][transfer none]
Since: 2.22
void gdk_window_set_cursor (GdkWindow *window,GdkCursor *cursor);
Sets the default mouse pointer for a GdkWindow.
Note that cursor
must be for the same display as window
.
Use gdk_cursor_new_for_display() or gdk_cursor_new_from_pixbuf() to
create the cursor. To make the cursor invisible, use GDK_BLANK_CURSOR.
Passing NULL for the cursor
argument to gdk_window_set_cursor() means
that window
will use the cursor of its parent window. Most windows
should use this default.
GdkCursor *
gdk_window_get_cursor (GdkWindow *window);
Retrieves a GdkCursor pointer for the cursor currently set on the
specified GdkWindow, or NULL. If the return value is NULL then
there is no custom cursor set on the specified window, and it is
using the cursor for its parent window.
a GdkCursor, or NULL. The
returned object is owned by the GdkWindow and should not be
unreferenced directly. Use gdk_window_set_cursor() to unset the
cursor of the window.
[nullable][transfer none]
Since: 2.18
void gdk_window_get_user_data (GdkWindow *window,gpointer *data);
Retrieves the user data for window
, which is normally the widget
that window
belongs to. See gdk_window_set_user_data().
void gdk_window_get_geometry (GdkWindow *window,gint *x,gint *y,gint *width,gint *height);
Any of the return location arguments to this function may be NULL,
if you aren’t interested in getting the value of that field.
The X and Y coordinates returned are relative to the parent window
of window
, which for toplevels usually means relative to the
window decorations (titlebar, etc.) rather than relative to the
root window (screen-size background window).
On the X11 platform, the geometry is obtained from the X server,
so reflects the latest position of window
; this may be out-of-sync
with the position of window
delivered in the most-recently-processed
GdkEventConfigure. gdk_window_get_position() in contrast gets the
position from the most recent configure event.
Note: If window
is not a toplevel, it is much better
to call gdk_window_get_position(), gdk_window_get_width() and
gdk_window_get_height() instead, because it avoids the roundtrip to
the X server and because these functions support the full 32-bit
coordinate space, whereas gdk_window_get_geometry() is restricted to
the 16-bit coordinates of X11.
window |
||
x |
return location for X coordinate of window (relative to its parent). |
[out][allow-none] |
y |
return location for Y coordinate of window (relative to its parent). |
[out][allow-none] |
width |
return location for width of window. |
[out][allow-none] |
height |
return location for height of window. |
[out][allow-none] |
void gdk_window_set_geometry_hints (GdkWindow *window,const GdkGeometry *geometry,GdkWindowHints geom_mask);
Sets the geometry hints for window
. Hints flagged in geom_mask
are set, hints not flagged in geom_mask
are unset.
To unset all hints, use a geom_mask
of 0 and a geometry
of NULL.
This function provides hints to the windowing system about
acceptable sizes for a toplevel window. The purpose of
this is to constrain user resizing, but the windowing system
will typically (but is not required to) also constrain the
current size of the window to the provided values and
constrain programatic resizing via gdk_window_resize() or
gdk_window_move_resize().
Note that on X11, this effect has no effect on windows
of type GDK_WINDOW_TEMP or windows where override redirect
has been turned on via gdk_window_set_override_redirect()
since these windows are not resizable by the user.
Since you can’t count on the windowing system doing the
constraints for programmatic resizes, you should generally
call gdk_window_constrain_size() yourself to determine
appropriate sizes.
window |
a toplevel GdkWindow |
|
geometry |
geometry hints |
|
geom_mask |
bitmask indicating fields of |
int
gdk_window_get_width (GdkWindow *window);
Returns the width of the given window
.
On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.
Since: 2.24
int
gdk_window_get_height (GdkWindow *window);
Returns the height of the given window
.
On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.
Since: 2.24
void gdk_window_set_icon_list (GdkWindow *window,GList *pixbufs);
Sets a list of icons for the window. One of these will be used to represent the window when it has been iconified. The icon is usually shown in an icon box or some sort of task bar. Which icon size is shown depends on the window manager. The window manager can scale the icon but setting several size icons can give better image quality since the window manager may only need to scale the icon by a small amount or not at all.
Note that some platforms don't support window icons.
window |
The GdkWindow toplevel window to set the icon of. |
|
pixbufs |
A list of pixbufs, of different sizes. |
[transfer none][element-type GdkPixbuf] |
void gdk_window_set_modal_hint (GdkWindow *window,gboolean modal);
The application can use this hint to tell the window manager that a certain window has modal behaviour. The window manager can use this information to handle modal windows in a special way.
You should only use this on windows for which you have
previously called gdk_window_set_transient_for()
gboolean
gdk_window_get_modal_hint (GdkWindow *window);
Determines whether or not the window manager is hinted that window
has modal behaviour.
Since: 2.22
void gdk_window_set_type_hint (GdkWindow *window,GdkWindowTypeHint hint);
The application can use this call to provide a hint to the window manager about the functionality of a window. The window manager can use this information when determining the decoration and behaviour of the window.
The hint must be set before the window is mapped.
GdkWindowTypeHint
gdk_window_get_type_hint (GdkWindow *window);
This function returns the type hint set for a window.
Since: 2.10
void gdk_window_set_shadow_width (GdkWindow *window,gint left,gint right,gint top,gint bottom);
Newer GTK+ windows using client-side decorations use extra geometry around their frames for effects like shadows and invisible borders. Window managers that want to maximize windows or snap to edges need to know where the extents of the actual frame lie, so that users don’t feel like windows are snapping against random invisible edges.
Note that this property is automatically updated by GTK+, so this function should only be used by applications which do not use GTK+ to create toplevel windows.
window |
||
left |
The left extent |
|
right |
The right extent |
|
top |
The top extent |
|
bottom |
The bottom extent |
Since: 3.12
void gdk_window_set_skip_taskbar_hint (GdkWindow *window,gboolean skips_taskbar);
Toggles whether a window should appear in a task list or window
list. If a window’s semantic type as specified with
gdk_window_set_type_hint() already fully describes the window, this
function should not be called in addition,
instead you should allow the window to be treated according to
standard policy for its semantic type.
Since: 2.2
void gdk_window_set_skip_pager_hint (GdkWindow *window,gboolean skips_pager);
Toggles whether a window should appear in a pager (workspace
switcher, or other desktop utility program that displays a small
thumbnail representation of the windows on the desktop). If a
window’s semantic type as specified with gdk_window_set_type_hint()
already fully describes the window, this function should
not be called in addition, instead you should
allow the window to be treated according to standard policy for
its semantic type.
Since: 2.2
void gdk_window_set_urgency_hint (GdkWindow *window,gboolean urgent);
Toggles whether a window needs the user's urgent attention.
Since: 2.8
void gdk_window_get_position (GdkWindow *window,gint *x,gint *y);
Obtains the position of the window as reported in the
most-recently-processed GdkEventConfigure. Contrast with
gdk_window_get_geometry() which queries the X server for the
current window position, regardless of which events have been
received or processed.
The position coordinates are relative to the window’s parent window.
void gdk_window_get_root_origin (GdkWindow *window,gint *x,gint *y);
Obtains the top-left corner of the window manager frame in root window coordinates.
window |
a toplevel GdkWindow |
|
x |
return location for X position of window frame. |
[out] |
y |
return location for Y position of window frame. |
[out] |
void gdk_window_get_frame_extents (GdkWindow *window,GdkRectangle *rect);
Obtains the bounding box of the window, including window manager
titlebar/borders if any. The frame position is given in root window
coordinates. To get the position of the window itself (rather than
the frame) in root window coordinates, use gdk_window_get_origin().
window |
a toplevel GdkWindow |
|
rect |
rectangle to fill with bounding box of the window frame. |
[out] |
gint gdk_window_get_origin (GdkWindow *window,gint *x,gint *y);
Obtains the position of a window in root window coordinates.
(Compare with gdk_window_get_position() and
gdk_window_get_geometry() which return the position of a window
relative to its parent window.)
void gdk_window_get_root_coords (GdkWindow *window,gint x,gint y,gint *root_x,gint *root_y);
Obtains the position of a window position in root
window coordinates. This is similar to
gdk_window_get_origin() but allows you to pass
in any position in the window, not just the origin.
window |
||
x |
X coordinate in window |
|
y |
Y coordinate in window |
|
root_x |
return location for X coordinate. |
[out] |
root_y |
return location for Y coordinate. |
[out] |
Since: 2.18
GdkWindow * gdk_window_get_pointer (GdkWindow *window,gint *x,gint *y,GdkModifierType *mask);
gdk_window_get_pointer has been deprecated since version 3.0 and should not be used in newly-written code.
Use gdk_window_get_device_position() instead.
Obtains the current pointer position and modifier state.
The position is given in coordinates relative to the upper left
corner of window
.
window |
||
x |
return location for X coordinate of pointer or |
[out][allow-none] |
y |
return location for Y coordinate of pointer or |
[out][allow-none] |
mask |
return location for modifier mask or |
[out][allow-none] |
the window containing the
pointer (as with gdk_window_at_pointer()), or NULL if the window
containing the pointer isn’t known to GDK.
[nullable][transfer none]
GdkWindow * gdk_window_get_device_position (GdkWindow *window,GdkDevice *device,gint *x,gint *y,GdkModifierType *mask);
Obtains the current device position and modifier state.
The position is given in coordinates relative to the upper left
corner of window
.
Use gdk_window_get_device_position_double() if you need subpixel precision.
The window underneath device
(as with gdk_device_get_window_at_position()), or NULL if the
window is not known to GDK.
[nullable][transfer none]
Since: 3.0
GdkWindow * gdk_window_get_device_position_double (GdkWindow *window,GdkDevice *device,gdouble *x,gdouble *y,GdkModifierType *mask);
Obtains the current device position in doubles and modifier state.
The position is given in coordinates relative to the upper left
corner of window
.
The window underneath device
(as with gdk_device_get_window_at_position()), or NULL if the
window is not known to GDK.
[nullable][transfer none]
Since: 3.10
GdkWindow *
gdk_window_get_parent (GdkWindow *window);
Obtains the parent of window
, as known to GDK. Does not query the
X server; thus this returns the parent as passed to gdk_window_new(),
not the actual parent. This should never matter unless you’re using
Xlib calls mixed with GDK calls on the X11 platform. It may also
matter for toplevel windows, because the window manager may choose
to reparent them.
Note that you should use gdk_window_get_effective_parent() when
writing generic code that walks up a window hierarchy, because
gdk_window_get_parent() will most likely not do what you expect if
there are offscreen windows in the hierarchy.
GdkWindow *
gdk_window_get_toplevel (GdkWindow *window);
Gets the toplevel window that’s an ancestor of window
.
Any window type but GDK_WINDOW_CHILD is considered a
toplevel window, as is a GDK_WINDOW_CHILD window that
has a root window as parent.
Note that you should use gdk_window_get_effective_toplevel() when
you want to get to a window’s toplevel as seen on screen, because
gdk_window_get_toplevel() will most likely not do what you expect
if there are offscreen windows in the hierarchy.
GList *
gdk_window_get_children (GdkWindow *window);
Gets the list of children of window
known to GDK.
This function only returns children created via GDK,
so for example it’s useless when used with the root window;
it only returns windows an application created itself.
The returned list must be freed, but the elements in the list need not be.
GList * gdk_window_get_children_with_user_data (GdkWindow *window,gpointer user_data);
Gets the list of children of window
known to GDK with a
particular user_data
set on it.
The returned list must be freed, but the elements in the list need not be.
The list is returned in (relative) stacking order, i.e. the lowest window is first.
Since: 3.10
GList *
gdk_window_peek_children (GdkWindow *window);
Like gdk_window_get_children(), but does not copy the list of
children, so the list does not need to be freed.
GdkEventMask
gdk_window_get_events (GdkWindow *window);
Gets the event mask for window
for all master input devices. See
gdk_window_set_events().
void gdk_window_set_events (GdkWindow *window,GdkEventMask event_mask);
The event mask for a window determines which events will be reported for that window from all master input devices. For example, an event mask including GDK_BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the GdkEventMask enumeration.
See the input handling overview for details.
void gdk_window_set_icon_name (GdkWindow *window,const gchar *name);
Windows may have a name used while minimized, distinct from the name they display in their titlebar. Most of the time this is a bad idea from a user interface standpoint. But you can set such a name with this function, if you like.
After calling this with a non-NULL name
, calls to gdk_window_set_title()
will not update the icon title.
Using NULL for name
unsets the icon title; further calls to
gdk_window_set_title() will again update the icon title as well.
Note that some platforms don't support window icons.
window |
a toplevel GdkWindow |
|
name |
name of window while iconified (minimized). |
[allow-none] |
void gdk_window_set_transient_for (GdkWindow *window,GdkWindow *parent);
Indicates to the window manager that window
is a transient dialog
associated with the application window parent
. This allows the
window manager to do things like center window
on parent
and
keep window
above parent
.
See gtk_window_set_transient_for() if you’re using GtkWindow or
GtkDialog.
void gdk_window_set_role (GdkWindow *window,const gchar *role);
When using GTK+, typically you should use gtk_window_set_role() instead
of this low-level function.
The window manager and session manager use a window’s role to distinguish it from other kinds of window in the same application. When an application is restarted after being saved in a previous session, all windows with the same title and role are treated as interchangeable. So if you have two windows with the same title that should be distinguished for session management purposes, you should set the role on those windows. It doesn’t matter what string you use for the role, as long as you have a different role for each non-interchangeable kind of window.
void gdk_window_set_startup_id (GdkWindow *window,const gchar *startup_id);
When using GTK+, typically you should use gtk_window_set_startup_id()
instead of this low-level function.
Since: 2.12
void gdk_window_set_group (GdkWindow *window,GdkWindow *leader);
Sets the group leader window for window
. By default,
GDK sets the group leader for all toplevel windows
to a global window implicitly created by GDK. With this function
you can override this default.
The group leader window allows the window manager to distinguish all windows that belong to a single application. It may for example allow users to minimize/unminimize all windows belonging to an application at once. You should only set a non-default group window if your application pretends to be multiple applications.
GdkWindow *
gdk_window_get_group (GdkWindow *window);
Returns the group leader window for window
. See gdk_window_set_group().
Since: 2.4
void gdk_window_set_decorations (GdkWindow *window,GdkWMDecoration decorations);
“Decorations” are the features the window manager adds to a toplevel GdkWindow.
This function sets the traditional Motif window manager hints that tell the
window manager which decorations you would like your window to have.
Usually you should use gtk_window_set_decorated() on a GtkWindow instead of
using the GDK function directly.
The decorations
argument is the logical OR of the fields in
the GdkWMDecoration enumeration. If GDK_DECOR_ALL is included in the
mask, the other bits indicate which decorations should be turned off.
If GDK_DECOR_ALL is not included, then the other bits indicate
which decorations should be turned on.
Most window managers honor a decorations hint of 0 to disable all decorations, but very few honor all possible combinations of bits.
gboolean gdk_window_get_decorations (GdkWindow *window,GdkWMDecoration *decorations);
Returns the decorations set on the GdkWindow with
gdk_window_set_decorations().
window |
The toplevel GdkWindow to get the decorations from |
|
decorations |
The window decorations will be written here. |
[out] |
void gdk_window_set_functions (GdkWindow *window,GdkWMFunction functions);
Sets hints about the window management functions to make available via buttons on the window frame.
On the X backend, this function sets the traditional Motif window manager hint for this purpose. However, few window managers do anything reliable or interesting with this hint. Many ignore it entirely.
The functions
argument is the logical OR of values from the
GdkWMFunction enumeration. If the bitmask includes GDK_FUNC_ALL,
then the other bits indicate which functions to disable; if
it doesn’t include GDK_FUNC_ALL, it indicates which functions to
enable.
GdkWindow *
gdk_get_default_root_window (void);
Obtains the root window (parent all other windows are inside) for the default display and screen.
gboolean
gdk_window_get_support_multidevice (GdkWindow *window);
Returns TRUE if the window is aware of the existence of multiple
devices.
Since: 3.0
void gdk_window_set_support_multidevice (GdkWindow *window,gboolean support_multidevice);
This function will enable multidevice features in window
.
Multidevice aware windows will need to handle properly multiple, per device enter/leave events, device grabs and grab ownerships.
Since: 3.0
GdkCursor * gdk_window_get_device_cursor (GdkWindow *window,GdkDevice *device);
Retrieves a GdkCursor pointer for the device
currently set on the
specified GdkWindow, or NULL. If the return value is NULL then
there is no custom cursor set on the specified window, and it is
using the cursor for its parent window.
a GdkCursor, or NULL. The
returned object is owned by the GdkWindow and should not be
unreferenced directly. Use gdk_window_set_cursor() to unset the
cursor of the window.
[nullable][transfer none]
Since: 3.0
void gdk_window_set_device_cursor (GdkWindow *window,GdkDevice *device,GdkCursor *cursor);
Sets a specific GdkCursor for a given device when it gets inside window
.
Use gdk_cursor_new_for_display() or gdk_cursor_new_from_pixbuf() to create
the cursor. To make the cursor invisible, use GDK_BLANK_CURSOR. Passing
NULL for the cursor
argument to gdk_window_set_cursor() means that
window
will use the cursor of its parent window. Most windows should
use this default.
Since: 3.0
GdkEventMask gdk_window_get_device_events (GdkWindow *window,GdkDevice *device);
Returns the event mask for window
corresponding to an specific device.
Since: 3.0
void gdk_window_set_device_events (GdkWindow *window,GdkDevice *device,GdkEventMask event_mask);
Sets the event mask for a given device (Normally a floating device, not
attached to any visible pointer) to window
. For example, an event mask
including GDK_BUTTON_PRESS_MASK means the window should report button
press events. The event mask is the bitwise OR of values from the
GdkEventMask enumeration.
See the input handling overview for details.
Since: 3.0
GdkEventMask gdk_window_get_source_events (GdkWindow *window,GdkInputSource source);
Returns the event mask for window
corresponding to the device class specified
by source
.
void gdk_window_set_source_events (GdkWindow *window,GdkInputSource source,GdkEventMask event_mask);
Sets the event mask for any floating device (i.e. not attached to any
visible pointer) that has the source defined as source
. This event
mask will be applied both to currently existing, newly added devices
after this call, and devices being attached/detached.
window |
||
source |
a GdkInputSource to define the source class. |
|
event_mask |
event mask for |
Since: 3.0
gboolean
gdk_window_get_event_compression (GdkWindow *window);
Get the current event compression setting for this window.
Since: 3.12
void gdk_window_set_event_compression (GdkWindow *window,gboolean event_compression);
Determines whether or not extra unprocessed motion events in
the event queue can be discarded. If TRUE only the most recent
event will be delivered.
Some types of applications, e.g. paint programs, need to see all motion events and will benefit from turning off event compression.
By default, event compression is enabled.
Since: 3.12
cairo_surface_t *
gdk_offscreen_window_get_surface (GdkWindow *window);
Gets the offscreen surface that an offscreen window renders into. If you need to keep this around over window resizes, you need to add a reference to it.
void gdk_offscreen_window_set_embedder (GdkWindow *window,GdkWindow *embedder);
Sets window
to be embedded in embedder
.
To fully embed an offscreen window, in addition to calling this
function, it is also necessary to handle the “pick-embedded-child”
signal on the embedder
and the “to-embedder” and
“from-embedder” signals on window
.
Since: 2.18
GdkWindow *
gdk_offscreen_window_get_embedder (GdkWindow *window);
Gets the window that window
is embedded in.
the embedding GdkWindow, or
NULL if window
is not an mbedded offscreen window.
[nullable][transfer none]
Since: 2.18
void
gdk_window_geometry_changed (GdkWindow *window);
This function informs GDK that the geometry of an embedded offscreen window has changed. This is necessary for GDK to keep track of which offscreen window the pointer is in.
Since: 2.18
void gdk_window_coords_from_parent (GdkWindow *window,gdouble parent_x,gdouble parent_y,gdouble *x,gdouble *y);
Transforms window coordinates from a parent window to a child
window, where the parent window is the normal parent as returned by
gdk_window_get_parent() for normal windows, and the window's
embedder as returned by gdk_offscreen_window_get_embedder() for
offscreen windows.
For normal windows, calling this function is equivalent to subtracting
the return values of gdk_window_get_position() from the parent coordinates.
For offscreen windows however (which can be arbitrarily transformed),
this function calls the GdkWindow::from-embedder: signal to translate
the coordinates.
You should always use this function when writing generic code that walks down a window hierarchy.
See also: gdk_window_coords_to_parent()
window |
a child window |
|
parent_x |
X coordinate in parent’s coordinate system |
|
parent_y |
Y coordinate in parent’s coordinate system |
|
x |
return location for X coordinate in child’s coordinate system. |
[out][allow-none] |
y |
return location for Y coordinate in child’s coordinate system. |
[out][allow-none] |
Since: 2.22
void gdk_window_coords_to_parent (GdkWindow *window,gdouble x,gdouble y,gdouble *parent_x,gdouble *parent_y);
Transforms window coordinates from a child window to its parent
window, where the parent window is the normal parent as returned by
gdk_window_get_parent() for normal windows, and the window's
embedder as returned by gdk_offscreen_window_get_embedder() for
offscreen windows.
For normal windows, calling this function is equivalent to adding
the return values of gdk_window_get_position() to the child coordinates.
For offscreen windows however (which can be arbitrarily transformed),
this function calls the GdkWindow::to-embedder: signal to translate
the coordinates.
You should always use this function when writing generic code that walks up a window hierarchy.
See also: gdk_window_coords_from_parent()
window |
a child window |
|
x |
X coordinate in child’s coordinate system |
|
y |
Y coordinate in child’s coordinate system |
|
parent_x |
return location for X coordinate
in parent’s coordinate system, or |
[out][allow-none] |
parent_y |
return location for Y coordinate
in parent’s coordinate system, or |
[out][allow-none] |
Since: 2.22
GdkWindow *
gdk_window_get_effective_parent (GdkWindow *window);
Obtains the parent of window
, as known to GDK. Works like
gdk_window_get_parent() for normal windows, but returns the
window’s embedder for offscreen windows.
See also: gdk_offscreen_window_get_embedder()
Since: 2.22
GdkWindow *
gdk_window_get_effective_toplevel (GdkWindow *window);
Gets the toplevel window that’s an ancestor of window
.
Works like gdk_window_get_toplevel(), but treats an offscreen window's
embedder as its parent, using gdk_window_get_effective_parent().
See also: gdk_offscreen_window_get_embedder()
Since: 2.22
Describes the kind of window.
|
root window; this window has no parent, covers the entire screen, and is created by the window system |
||
|
toplevel window (used to implement GtkWindow) |
||
|
child window (used to implement e.g. GtkEntry) |
||
|
override redirect temporary window (used to implement GtkMenu) |
||
|
foreign window (see |
||
|
offscreen window (see Offscreen Windows). Since 2.18 |
||
|
subsurface-based window; This window is visually tied to a toplevel, and is moved/stacked with it. Currently this window type is only implemented in Wayland. Since 3.14 |
GDK_INPUT_OUTPUT
windows are the standard kind of window you might expect.
Such windows receive events and are also displayed on screen.
GDK_INPUT_ONLY
windows are invisible; they are usually placed above other
windows in order to trap or filter the events. You can’t draw on
GDK_INPUT_ONLY
windows.
Used to indicate which fields of a GdkGeometry struct should be paid
attention to. Also, the presence/absence of GDK_HINT_POS
,
GDK_HINT_USER_POS
, and GDK_HINT_USER_SIZE
is significant, though they don't
directly refer to GdkGeometry fields. GDK_HINT_USER_POS
will be set
automatically by GtkWindow if you call gtk_window_move().
GDK_HINT_USER_POS
and GDK_HINT_USER_SIZE
should be set if the user
specified a size/position using a --geometry command-line argument;
gtk_window_parse_geometry() automatically sets these flags.
|
indicates that the program has positioned the window |
||
|
min size fields are set |
||
|
max size fields are set |
||
|
base size fields are set |
||
|
aspect ratio fields are set |
||
|
resize increment fields are set |
||
|
window gravity field is set |
||
|
indicates that the window’s position was explicitly set by the user |
||
|
indicates that the window’s size was explicitly set by the user |
struct GdkGeometry {
gint min_width;
gint min_height;
gint max_width;
gint max_height;
gint base_width;
gint base_height;
gint width_inc;
gint height_inc;
gdouble min_aspect;
gdouble max_aspect;
GdkGravity win_gravity;
};
The GdkGeometry struct gives the window manager information about
a window’s geometry constraints. Normally you would set these on
the GTK+ level using gtk_window_set_geometry_hints(). GtkWindow
then sets the hints on the GdkWindow it creates.
gdk_window_set_geometry_hints() expects the hints to be fully valid already
and simply passes them to the window manager; in contrast,
gtk_window_set_geometry_hints() performs some interpretation. For example,
GtkWindow will apply the hints to the geometry widget instead of the
toplevel window, if you set a geometry widget. Also, the
min_width
/min_height
/max_width
/max_height
fields may be set to -1, and
GtkWindow will substitute the size request of the window or geometry widget.
If the minimum size hint is not provided, GtkWindow will use its requisition
as the minimum size. If the minimum size is provided and a geometry widget is
set, GtkWindow will take the minimum size as the minimum size of the
geometry widget rather than the entire window. The base size is treated
similarly.
The canonical use-case for gtk_window_set_geometry_hints() is to get a
terminal widget to resize properly. Here, the terminal text area should be
the geometry widget; GtkWindow will then automatically set the base size to
the size of other widgets in the terminal window, such as the menubar and
scrollbar. Then, the width_inc
and height_inc
fields should be set to the
size of one character in the terminal. Finally, the base size should be set
to the size of one character. The net effect is that the minimum size of the
terminal will have a 1x1 character terminal area, and only terminal sizes on
the “character grid” will be allowed.
Here’s an example of how the terminal example would be implemented, assuming a terminal area widget called “terminal” and a toplevel window “toplevel”:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
GdkGeometry hints; hints.base_width = terminal->char_width; hints.base_height = terminal->char_height; hints.min_width = terminal->char_width; hints.min_height = terminal->char_height; hints.width_inc = terminal->char_width; hints.height_inc = terminal->char_height; gtk_window_set_geometry_hints (GTK_WINDOW (toplevel), GTK_WIDGET (terminal), &hints, GDK_HINT_RESIZE_INC | GDK_HINT_MIN_SIZE | GDK_HINT_BASE_SIZE); |
The other useful fields are the min_aspect
and max_aspect
fields; these
contain a width/height ratio as a floating point number. If a geometry widget
is set, the aspect applies to the geometry widget rather than the entire
window. The most common use of these hints is probably to set min_aspect
and
max_aspect
to the same value, thus forcing the window to keep a constant
aspect ratio.
gint |
minimum width of window (or -1 to use requisition, with GtkWindow only) |
|
gint |
minimum height of window (or -1 to use requisition, with GtkWindow only) |
|
gint |
maximum width of window (or -1 to use requisition, with GtkWindow only) |
|
gint |
maximum height of window (or -1 to use requisition, with GtkWindow only) |
|
gint |
allowed window widths are |
|
gint |
allowed window widths are |
|
gint |
width resize increment |
|
gint |
height resize increment |
|
gdouble |
minimum width/height ratio |
|
gdouble |
maximum width/height ratio |
|
GdkGravity |
window gravity, see |
Defines the reference point of a window and the meaning of coordinates
passed to gtk_window_move(). See gtk_window_move() and the "implementation
notes" section of the
Extended Window Manager Hints
specification for more details.
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the reference point is at the top left corner. |
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the reference point is in the middle of the top edge. |
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the reference point is at the top right corner. |
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the reference point is at the middle of the left edge. |
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the reference point is at the center of the window. |
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the reference point is at the middle of the right edge. |
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the reference point is at the lower left corner. |
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the reference point is at the middle of the lower edge. |
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the reference point is at the lower right corner. |
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the reference point is at the top left corner of the window itself, ignoring window manager decorations. |
Positioning hints for aligning a window relative to a rectangle.
These hints determine how the window should be positioned in the case that the window would fall off-screen if placed in its ideal position.
For example, GDK_ANCHOR_FLIP_X will replace GDK_GRAVITY_NORTH_WEST with
GDK_GRAVITY_NORTH_EAST and vice versa if the window extends beyond the left
or right edges of the monitor.
If GDK_ANCHOR_SLIDE_X is set, the window can be shifted horizontally to fit
on-screen. If GDK_ANCHOR_RESIZE_X is set, the window can be shrunken
horizontally to fit.
In general, when multiple flags are set, flipping should take precedence over sliding, which should take precedence over resizing.
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allow flipping anchors horizontally |
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allow flipping anchors vertically |
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allow sliding window horizontally |
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allow sliding window vertically |
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allow resizing window horizontally |
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allow resizing window vertically |
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allow flipping anchors on both axes |
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allow sliding window on both axes |
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allow resizing window on both axes |
Since: 3.22
Stability Level: Unstable
Determines a window edge or corner.
These are hints for the window manager that indicate what type of function the window has. The window manager can use this when determining decoration and behaviour of the window. The hint must be set before mapping the window.
See the Extended Window Manager Hints specification for more details about window types.
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Normal toplevel window. |
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Dialog window. |
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Window used to implement a menu; GTK+ uses this hint only for torn-off menus, see GtkTearoffMenuItem. |
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Window used to implement toolbars. |
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Window used to display a splash screen during application startup. |
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Utility windows which are not detached toolbars or dialogs. |
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Used for creating dock or panel windows. |
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Used for creating the desktop background window. |
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A menu that belongs to a menubar. |
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A menu that does not belong to a menubar, e.g. a context menu. |
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A tooltip. |
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A notification - typically a “bubble” that belongs to a status icon. |
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A popup from a combo box. |
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A window that is used to implement a DND cursor. |
struct GdkWindowAttr {
gchar *title;
gint event_mask;
gint x, y;
gint width;
gint height;
GdkWindowWindowClass wclass;
GdkVisual *visual;
GdkWindowType window_type;
GdkCursor *cursor;
gchar *wmclass_name;
gchar *wmclass_class;
gboolean override_redirect;
GdkWindowTypeHint type_hint;
};
Attributes to use for a newly-created window.
gchar * |
title of the window (for toplevel windows) |
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gint |
event mask (see |
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gint |
X coordinate relative to parent window (see |
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gint |
Y coordinate relative to parent window (see |
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gint |
width of window |
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gint |
height of window |
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GdkWindowWindowClass |
GDK_INPUT_OUTPUT (normal window) or GDK_INPUT_ONLY (invisible window that receives events) |
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GdkVisual * |
GdkVisual for window |
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GdkWindowType |
type of window |
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GdkCursor * |
cursor for the window (see |
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gchar * |
don’t use (see |
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gchar * |
don’t use (see |
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gboolean |
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GdkWindowTypeHint |
a hint of the function of the window |
Used to indicate which fields in the GdkWindowAttr struct should be honored.
For example, if you filled in the “cursor” and “x” fields of GdkWindowAttr,
pass “GDK_WA_X
| GDK_WA_CURSOR
” to gdk_window_new(). Fields in
GdkWindowAttr not covered by a bit in this enum are required; for example,
the width
/height
, wclass
, and window_type
fields are required, they have
no corresponding flag in GdkWindowAttributesType.
Indicates which monitor (in a multi-head setup) a window should span over when in fullscreen mode.
Since: 3.8
typedef void GdkXEvent; /* Can be cast to window system specific
Used to represent native events (XEvents for the X11 backend, MSGs for Win32).
#define GDK_PARENT_RELATIVE 1L
A special value, indicating that the background for a window should be inherited from the parent window.
A set of bit-flags to indicate the state of modifier keys and mouse buttons in various event types. Typical modifier keys are Shift, Control, Meta, Super, Hyper, Alt, Compose, Apple, CapsLock or ShiftLock.
Like the X Window System, GDK supports 8 modifier keys and 5 mouse buttons.
Since 2.10, GDK recognizes which of the Meta, Super or Hyper keys are mapped
to Mod2 - Mod5, and indicates this by setting GDK_SUPER_MASK,
GDK_HYPER_MASK or GDK_META_MASK in the state field of key events.
Note that GDK may add internal values to events which include
reserved values such as GDK_MODIFIER_RESERVED_13_MASK. Your code
should preserve and ignore them. You can use GDK_MODIFIER_MASK to
remove all reserved values.
Also note that the GDK X backend interprets button press events for button
4-7 as scroll events, so GDK_BUTTON4_MASK and GDK_BUTTON5_MASK will never
be set.
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the Shift key. |
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a Lock key (depending on the modifier mapping of the X server this may either be CapsLock or ShiftLock). |
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the Control key. |
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the fourth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier, but normally it is the Alt key). |
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the fifth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier). |
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the sixth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier). |
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the seventh modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier). |
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the eighth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier). |
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the first mouse button. |
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the second mouse button. |
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the third mouse button. |
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the fourth mouse button. |
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the fifth mouse button. |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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A reserved bit flag; do not use in your own code |
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the Super modifier. Since 2.10 |
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the Hyper modifier. Since 2.10 |
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the Meta modifier. Since 2.10 |
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A reserved bit flag; do not use in your own code |
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not used in GDK itself. GTK+ uses it to differentiate between (keyval, modifiers) pairs from key press and release events. |
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a mask covering all modifier types. |
This enum is used with gdk_keymap_get_modifier_mask()
in order to determine what modifiers the
currently used windowing system backend uses for particular
purposes. For example, on X11/Windows, the Control key is used for
invoking menu shortcuts (accelerators), whereas on Apple computers
it’s the Command key (which correspond to GDK_CONTROL_MASK and
GDK_MOD2_MASK, respectively).
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the primary modifier used to invoke menu accelerators. |
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the modifier used to invoke context menus. Note that mouse button 3 always triggers context menus. When this modifier is not 0, it additionally triggers context menus when used with mouse button 1. |
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the modifier used to extend selections
using |
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the modifier used to modify selections, which in most cases means toggling the clicked item into or out of the selection. |
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when any of these modifiers is pressed, the key event cannot produce a symbol directly. This is meant to be used for input methods, and for use cases like typeahead search. |
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the modifier that switches between keyboard groups (AltGr on X11/Windows and Option/Alt on OS X). |
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The set of modifier masks accepted as modifiers in accelerators. Needed because Command is mapped to MOD2 on OSX, which is widely used, but on X11 MOD2 is NumLock and using that for a mod key is problematic at best. Ref: https://bugzilla.gnome.org/show_bug.cgi?id=736125. |
Since: 3.4
These are hints originally defined by the Motif toolkit. The window manager can use them when determining how to decorate the window. The hint must be set before mapping the window.
“cursor” property“cursor” GdkCursor *
The mouse pointer for a GdkWindow. See gdk_window_set_cursor() and
gdk_window_get_cursor() for details.
Owner: GdkWindow
Flags: Read / Write
Since: 2.18
“create-surface” signalCairoSurface* user_function (GdkWindow *window, int width, int height, gpointer user_data)
The ::create-surface signal is emitted when an offscreen window
needs its surface (re)created, which happens either when the
window is first drawn to, or when the window is being
resized. The first signal handler that returns a non-NULL
surface will stop any further signal emission, and its surface
will be used.
Note that it is not possible to access the window's previous
surface from within any callback of this signal. Calling
gdk_offscreen_window_get_surface() will lead to a crash.
window |
the offscreen window on which the signal is emitted |
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width |
the width of the offscreen surface to create |
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height |
the height of the offscreen surface to create |
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user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 3.0
“from-embedder” signalvoid user_function (GdkWindow *window, double embedder_x, double embedder_y, gpointer offscreen_x, gpointer offscreen_y, gpointer user_data)
The ::from-embedder signal is emitted to translate coordinates in the embedder of an offscreen window to the offscreen window.
See also “to-embedder”.
window |
the offscreen window on which the signal is emitted |
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embedder_x |
x coordinate in the embedder window |
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embedder_y |
y coordinate in the embedder window |
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offscreen_x |
return location for the x coordinate in the offscreen window. |
[out][type double] |
offscreen_y |
return location for the y coordinate in the offscreen window. |
[out][type double] |
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 2.18
“moved-to-rect” signalvoid user_function (GdkWindow *window, gpointer flipped_rect, gpointer final_rect, gboolean flipped_x, gboolean flipped_y, gpointer user_data)
Emitted when the position of window
is finalized after being moved to a
destination rectangle.
window
might be flipped over the destination rectangle in order to keep
it on-screen, in which case flipped_x
and flipped_y
will be set to TRUE
accordingly.
flipped_rect
is the ideal position of window
after any possible
flipping, but before any possible sliding. final_rect
is flipped_rect
,
but possibly translated in the case that flipping is still ineffective in
keeping window
on-screen.
window |
the GdkWindow that moved |
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flipped_rect |
the position of |
[nullable] |
final_rect |
the final position of |
[nullable] |
flipped_x |
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flipped_y |
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user_data |
user data set when the signal handler was connected. |
Flags: Run First
Since: 3.22
Stability Level: Private
“pick-embedded-child” signalGdkWindow* user_function (GdkWindow *window, double x, double y, gpointer user_data)
The ::pick-embedded-child signal is emitted to find an embedded child at the given position.
window |
the window on which the signal is emitted |
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x |
x coordinate in the window |
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y |
y coordinate in the window |
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user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 2.18
“to-embedder” signalvoid user_function (GdkWindow *window, double offscreen_x, double offscreen_y, gpointer embedder_x, gpointer embedder_y, gpointer user_data)
The ::to-embedder signal is emitted to translate coordinates in an offscreen window to its embedder.
See also “from-embedder”.
window |
the offscreen window on which the signal is emitted |
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offscreen_x |
x coordinate in the offscreen window |
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offscreen_y |
y coordinate in the offscreen window |
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embedder_x |
return location for the x coordinate in the embedder window. |
[out][type double] |
embedder_y |
return location for the y coordinate in the embedder window. |
[out][type double] |
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 2.18