Fl_Chart Class Reference

Fl_Chart displays simple charts. More...

#include <Fl_Chart.H>

Inheritance diagram for Fl_Chart:

Public Member Functions
void	add (double val, const char *str=0, unsigned col=0)
	Add the data value val with optional label str and color col to the chart. More...
uchar	autosize () const
	Get whether the chart will automatically adjust the bounds of the chart. More...
void	autosize (uchar n)
	Set whether the chart will automatically adjust the bounds of the chart. More...
void	bounds (double *a, double *b) const
	Gets the lower and upper bounds of the chart values. More...
void	bounds (double a, double b)
	Sets the lower and upper bounds of the chart values. More...
void	clear ()
	Removes all values from the chart.
	Fl_Chart (int X, int Y, int W, int H, const char *L=0)
	Create a new Fl_Chart widget using the given position, size and label string. More...
void	insert (int ind, double val, const char *str=0, unsigned col=0)
	Inserts a data value val at the given position ind. More...
int	maxsize () const
	Gets the maximum number of data values for a chart.
void	maxsize (int m)
	Set the maximum number of data values for a chart. More...
void	replace (int ind, double val, const char *str=0, unsigned col=0)
	Replace a data value val at the given position ind. More...
int	size () const
	Returns the number of data values in the chart.
void	size (int W, int H)
Fl_Color	textcolor () const
	Gets the chart's text color.
void	textcolor (Fl_Color n)
	gets the chart's text color to n.
Fl_Font	textfont () const
	Gets the chart's text font.
void	textfont (Fl_Font s)
	Sets the chart's text font to s.
Fl_Fontsize	textsize () const
	Gets the chart's text size.
void	textsize (Fl_Fontsize s)
	gets the chart's text size to s.
	~Fl_Chart ()
	Destroys the Fl_Chart widget and all of its data.
Public Member Functions inherited from Fl_Widget
void	_clear_fullscreen ()
void	_set_fullscreen ()
void	activate ()
	Activates the widget. More...
unsigned int	active () const
	Returns whether the widget is active. More...
int	active_r () const
	Returns whether the widget and all of its parents are active. More...
Fl_Align	align () const
	Gets the label alignment. More...
void	align (Fl_Align alignment)
	Sets the label alignment. More...
long	argument () const
	Gets the current user data (long) argument that is passed to the callback function. More...
void	argument (long v)
	Sets the current user data (long) argument that is passed to the callback function. More...
virtual class Fl_Gl_Window *	as_gl_window ()
	Returns an Fl_Gl_Window pointer if this widget is an Fl_Gl_Window. More...
virtual Fl_Group *	as_group ()
	Returns an Fl_Group pointer if this widget is an Fl_Group. More...
virtual Fl_Window *	as_window ()
	Returns an Fl_Window pointer if this widget is an Fl_Window. More...
Fl_Boxtype	box () const
	Gets the box type of the widget. More...
void	box (Fl_Boxtype new_box)
	Sets the box type for the widget. More...
Fl_Callback_p	callback () const
	Gets the current callback function for the widget. More...
void	callback (Fl_Callback *cb)
	Sets the current callback function for the widget. More...
void	callback (Fl_Callback *cb, void *p)
	Sets the current callback function for the widget. More...
void	callback (Fl_Callback0 *cb)
	Sets the current callback function for the widget. More...
void	callback (Fl_Callback1 *cb, long p=0)
	Sets the current callback function for the widget. More...
unsigned int	changed () const
	Checks if the widget value changed since the last callback. More...
void	clear_active ()
	Marks the widget as inactive without sending events or changing focus. More...
void	clear_changed ()
	Marks the value of the widget as unchanged. More...
void	clear_damage (uchar c=0)
	Clears or sets the damage flags. More...
void	clear_output ()
	Sets a widget to accept input. More...
void	clear_visible ()
	Hides the widget. More...
void	clear_visible_focus ()
	Disables keyboard focus navigation with this widget. More...
Fl_Color	color () const
	Gets the background color of the widget. More...
void	color (Fl_Color bg)
	Sets the background color of the widget. More...
void	color (Fl_Color bg, Fl_Color sel)
	Sets the background and selection color of the widget. More...
Fl_Color	color2 () const
	For back compatibility only. More...
void	color2 (unsigned a)
	For back compatibility only. More...
int	contains (const Fl_Widget *w) const
	Checks if w is a child of this widget. More...
void	copy_label (const char *new_label)
	Sets the current label. More...
void	copy_tooltip (const char *text)
	Sets the current tooltip text. More...
uchar	damage () const
	Returns non-zero if draw() needs to be called. More...
void	damage (uchar c)
	Sets the damage bits for the widget. More...
void	damage (uchar c, int x, int y, int w, int h)
	Sets the damage bits for an area inside the widget. More...
int	damage_resize (int, int, int, int)
	Internal use only.
void	deactivate ()
	Deactivates the widget. More...
Fl_Image *	deimage ()
	Gets the image that is used as part of the widget label. More...
const Fl_Image *	deimage () const
void	deimage (Fl_Image &img)
	Sets the image to use as part of the widget label. More...
void	deimage (Fl_Image *img)
	Sets the image to use as part of the widget label. More...
void	do_callback ()
	Calls the widget callback. More...
void	do_callback (Fl_Widget *o, long arg)
	Calls the widget callback. More...
void	do_callback (Fl_Widget *o, void *arg=0)
	Calls the widget callback. More...
virtual void	draw ()=0
	Draws the widget. More...
void	draw_label (int, int, int, int, Fl_Align) const
	Draws the label in an arbitrary bounding box with an arbitrary alignment. More...
int	h () const
	Gets the widget height. More...
virtual int	handle (int event)
	Handles the specified event. More...
virtual void	hide ()
	Makes a widget invisible. More...
Fl_Image *	image ()
	Gets the image that is used as part of the widget label. More...
const Fl_Image *	image () const
void	image (Fl_Image &img)
	Sets the image to use as part of the widget label. More...
void	image (Fl_Image *img)
	Sets the image to use as part of the widget label. More...
int	inside (const Fl_Widget *wgt) const
	Checks if this widget is a child of wgt. More...
int	is_label_copied () const
	Returns whether the current label was assigned with copy_label(). More...
const char *	label () const
	Gets the current label text. More...
void	label (const char *text)
	Sets the current label pointer. More...
void	label (Fl_Labeltype a, const char *b)
	Shortcut to set the label text and type in one call. More...
Fl_Color	labelcolor () const
	Gets the label color. More...
void	labelcolor (Fl_Color c)
	Sets the label color. More...
Fl_Font	labelfont () const
	Gets the font to use. More...
void	labelfont (Fl_Font f)
	Sets the font to use. More...
Fl_Fontsize	labelsize () const
	Gets the font size in pixels. More...
void	labelsize (Fl_Fontsize pix)
	Sets the font size in pixels. More...
Fl_Labeltype	labeltype () const
	Gets the label type. More...
void	labeltype (Fl_Labeltype a)
	Sets the label type. More...
void	measure_label (int &ww, int &hh) const
	Sets width ww and height hh accordingly with the label size. More...
unsigned int	output () const
	Returns if a widget is used for output only. More...
Fl_Group *	parent () const
	Returns a pointer to the parent widget. More...
void	parent (Fl_Group *p)
	Internal use only - "for hacks only". More...
void	position (int X, int Y)
	Repositions the window or widget. More...
void	redraw ()
	Schedules the drawing of the widget. More...
void	redraw_label ()
	Schedules the drawing of the label. More...
virtual void	resize (int x, int y, int w, int h)
	Changes the size or position of the widget. More...
Fl_Color	selection_color () const
	Gets the selection color. More...
void	selection_color (Fl_Color a)
	Sets the selection color. More...
void	set_active ()
	Marks the widget as active without sending events or changing focus. More...
void	set_changed ()
	Marks the value of the widget as changed. More...
void	set_output ()
	Sets a widget to output only. More...
void	set_visible ()
	Makes the widget visible. More...
void	set_visible_focus ()
	Enables keyboard focus navigation with this widget. More...
virtual void	show ()
	Makes a widget visible. More...
void	size (int W, int H)
	Changes the size of the widget. More...
int	take_focus ()
	Gives the widget the keyboard focus. More...
unsigned int	takesevents () const
	Returns if the widget is able to take events. More...
int	test_shortcut ()
	Returns true if the widget's label contains the entered '&x' shortcut. More...
const char *	tooltip () const
	Gets the current tooltip text. More...
void	tooltip (const char *text)
	Sets the current tooltip text. More...
Fl_Window *	top_window () const
	Returns a pointer to the top-level window for the widget. More...
Fl_Window *	top_window_offset (int &xoff, int &yoff) const
	Finds the x/y offset of the current widget relative to the top-level window. More...
uchar	type () const
	Gets the widget type. More...
void	type (uchar t)
	Sets the widget type. More...
int	use_accents_menu ()
	Returns non zero if MAC_USE_ACCENTS_MENU flag is set, 0 otherwise.
void *	user_data () const
	Gets the user data for this widget. More...
void	user_data (void *v)
	Sets the user data for this widget. More...
unsigned int	visible () const
	Returns whether a widget is visible. More...
unsigned int	visible_focus ()
	Checks whether this widget has a visible focus. More...
void	visible_focus (int v)
	Modifies keyboard focus navigation. More...
int	visible_r () const
	Returns whether a widget and all its parents are visible. More...
int	w () const
	Gets the widget width. More...
Fl_When	when () const
	Returns the conditions under which the callback is called. More...
void	when (uchar i)
	Sets the flags used to decide when a callback is called. More...
Fl_Window *	window () const
	Returns a pointer to the nearest parent window up the widget hierarchy. More...
int	x () const
	Gets the widget position in its window. More...
int	y () const
	Gets the widget position in its window. More...
virtual	~Fl_Widget ()
	Destroys the widget. More...

Protected Member Functions
void	draw ()
	Draws the widget. More...
Protected Member Functions inherited from Fl_Widget
void	clear_flag (unsigned int c)
	Clears a flag in the flags mask.
void	draw_backdrop () const
	If FL_ALIGN_IMAGE_BACKDROP is set, the image or deimage will be drawn.
void	draw_box () const
	Draws the widget box according its box style.
void	draw_box (Fl_Boxtype t, Fl_Color c) const
	Draws a box of type t, of color c at the widget's position and size.
void	draw_box (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color c) const
	Draws a box of type t, of color c at the position X,Y and size W,H.
void	draw_focus ()
	draws a focus rectangle around the widget
void	draw_focus (Fl_Boxtype t, int x, int y, int w, int h) const
	Draws a focus box for the widget at the given position and size.
void	draw_label () const
	Draws the widget's label at the defined label position. More...
void	draw_label (int, int, int, int) const
	Draws the label in an arbitrary bounding box. More...
	Fl_Widget (int x, int y, int w, int h, const char *label=0L)
	Creates a widget at the given position and size. More...
unsigned int	flags () const
	Gets the widget flags mask.
void	h (int v)
	Internal use only. More...
void	set_flag (unsigned int c)
	Sets a flag in the flags mask.
void	w (int v)
	Internal use only. More...
void	x (int v)
	Internal use only. More...
void	y (int v)
	Internal use only. More...

Additional Inherited Members
Static Public Member Functions inherited from Fl_Widget
static void	default_callback (Fl_Widget *cb, void *d)
	The default callback for all widgets that don't set a callback. More...
static unsigned int	label_shortcut (const char *t)
	Returns the Unicode value of the '&x' shortcut in a given text. More...
static int	test_shortcut (const char *, const bool require_alt=false)
	Returns true if the given text t contains the entered '&x' shortcut. More...
Protected Types inherited from Fl_Widget
enum	{   INACTIVE = 1<<0 , INVISIBLE = 1<<1 , OUTPUT = 1<<2 , NOBORDER = 1<<3 ,   FORCE_POSITION = 1<<4 , NON_MODAL = 1<<5 , SHORTCUT_LABEL = 1<<6 , CHANGED = 1<<7 ,   OVERRIDE = 1<<8 , VISIBLE_FOCUS = 1<<9 , COPIED_LABEL = 1<<10 , CLIP_CHILDREN = 1<<11 ,   MENU_WINDOW = 1<<12 , TOOLTIP_WINDOW = 1<<13 , MODAL = 1<<14 , NO_OVERLAY = 1<<15 ,   GROUP_RELATIVE = 1<<16 , COPIED_TOOLTIP = 1<<17 , FULLSCREEN = 1<<18 , MAC_USE_ACCENTS_MENU = 1<<19 ,   USERFLAG3 = 1<<29 , USERFLAG2 = 1<<30 , USERFLAG1 = 1<<31 }
	flags possible values enumeration. More...

Detailed Description

Fl_Chart displays simple charts.

It is provided for Forms compatibility.

Todo:

Refactor Fl_Chart::type() information.

The type of an Fl_Chart object can be set using type(uchar t) to:

• FL_BAR_CHART: Each sample value is drawn as a vertical bar.
• FL_FILLED_CHART: The chart is filled from the bottom of the graph to the sample values.
• FL_HORBAR_CHART: Each sample value is drawn as a horizontal bar.
• FL_LINE_CHART: The chart is drawn as a polyline with vertices at each sample value.
• FL_PIE_CHART: A pie chart is drawn with each sample value being drawn as a proportionate slice in the circle.
• FL_SPECIALPIE_CHART: Like FL_PIE_CHART, but the first slice is separated from the pie.
• FL_SPIKE_CHART: Each sample value is drawn as a vertical line.

Constructor & Destructor Documentation

Fl_Chart()

Fl_Chart::Fl_Chart	(	int	X,
		int	Y,
		int	W,
		int	H,
		const char *	L = 0
	)

Create a new Fl_Chart widget using the given position, size and label string.

The default boxstyle is FL_NO_BOX.

Parameters

[in]	X,Y,W,H	position and size of the widget
[in]	L	widget label, default is no label

Member Function Documentation

add()

void Fl_Chart::add	(	double	val,
		const char *	str = 0,
		unsigned	col = 0
	)

Add the data value val with optional label str and color col to the chart.

Parameters

[in]	val	data value
[in]	str	optional data label
[in]	col	optional data color

autosize() [1/2]

uchar Fl_Chart::autosize ( ) const

inline

Get whether the chart will automatically adjust the bounds of the chart.

Returns

non-zero if auto-sizing is enabled and zero if disabled.

autosize() [2/2]

void Fl_Chart::autosize ( uchar  n )

inline

Set whether the chart will automatically adjust the bounds of the chart.

Parameters

[in]

n

non-zero to enable automatic resizing, zero to disable.

bounds() [1/2]

void Fl_Chart::bounds ( double *  a, double *  b  ) const

inline

Gets the lower and upper bounds of the chart values.

Parameters

[out]

a,b

are set to lower, upper

bounds() [2/2]

void Fl_Chart::bounds	(	double	a,
		double	b
	)

Sets the lower and upper bounds of the chart values.

Parameters

[in]

a,b

are used to set lower, upper

draw()

void Fl_Chart::draw ( )

protectedvirtual

Draws the widget.

Never call this function directly. FLTK will schedule redrawing whenever needed. If your widget must be redrawn as soon as possible, call redraw() instead.

Override this function to draw your own widgets.

If you ever need to call another widget's draw method from within your own draw() method, e.g. for an embedded scrollbar, you can do it (because draw() is virtual) like this:

Fl_Widget *s = &scroll;               // scroll is an embedded Fl_Scrollbar
s->draw();                    // calls Fl_Scrollbar::draw()

Implements Fl_Widget.

insert()

void Fl_Chart::insert	(	int	ind,
		double	val,
		const char *	str = 0,
		unsigned	col = 0
	)

Inserts a data value val at the given position ind.

Position 1 is the first data value.

Parameters

[in]	ind	insertion position
[in]	val	data value
[in]	str	optional data label
[in]	col	optional data color

maxsize()

void Fl_Chart::maxsize

(

int

m

)

Set the maximum number of data values for a chart.

If you do not call this method then the chart will be allowed to grow to any size depending on available memory.

Parameters

[in]

m

maximum number of data values allowed.

replace()

void Fl_Chart::replace	(	int	ind,
		double	val,
		const char *	str = 0,
		unsigned	col = 0
	)

Replace a data value val at the given position ind.

Position 1 is the first data value.

Parameters

[in]	ind	insertion position
[in]	val	data value
[in]	str	optional data label
[in]	col	optional data color

---

The documentation for this class was generated from the following files:

• Fl_Chart.H
• Fl_Chart.cxx