champlain-bounding-box: libchamplain Reference Manual

champlain-bounding-box

champlain-bounding-box — A basic struct to describe a bounding box

Functions

ChamplainBoundingBox *	champlain_bounding_box_new ()
ChamplainBoundingBox *	champlain_bounding_box_copy ()
void	champlain_bounding_box_free ()
void	champlain_bounding_box_get_center ()
void	champlain_bounding_box_compose ()
void	champlain_bounding_box_extend ()
gboolean	champlain_bounding_box_is_valid ()
gboolean	champlain_bounding_box_covers ()

Types and Values

struct

ChamplainBoundingBox

Object Hierarchy

    GBoxed
    ╰── ChamplainBoundingBox

Description

A basic struct to describe a bounding box.

Functions

champlain_bounding_box_new ()

ChamplainBoundingBox *
champlain_bounding_box_new (void);

Creates a newly allocated ChamplainBoundingBox to be freed with champlain_bounding_box_free().

Returns

a ChamplainBoundingBox

Since: 0.6

champlain_bounding_box_copy ()

ChamplainBoundingBox *
champlain_bounding_box_copy (const ChamplainBoundingBox *bbox);

Makes a copy of the bounding box structure. The result must be freed using champlain_bounding_box_free().

Parameters

bbox

a ChamplainBoundingBox

Returns

an allocated copy of bbox .

Since: 0.6

champlain_bounding_box_free ()

void
champlain_bounding_box_free (ChamplainBoundingBox *bbox);

Frees a bounding box structure created with champlain_bounding_box_new() or champlain_bounding_box_copy().

Parameters

bbox

a ChamplainBoundingBox

Since: 0.6

champlain_bounding_box_get_center ()

void
champlain_bounding_box_get_center (ChamplainBoundingBox *bbox,
                                   gdouble *latitude,
                                   gdouble *longitude);

Gets the center's latitude and longitude of the box to latitude and longitude .

Parameters

bbox	a ChamplainBoundingBox
latitude	the latitude of the box center.	[out]
longitude	the longitude of the box center.	[out]

Since: 0.6

champlain_bounding_box_compose ()

void
champlain_bounding_box_compose (ChamplainBoundingBox *bbox,
                                ChamplainBoundingBox *other);

Sets bbox equal to the bounding box containing both bbox and other .

Parameters

bbox	a ChamplainBoundingBox
other	a ChamplainBoundingBox

Since: 0.10

champlain_bounding_box_extend ()

void
champlain_bounding_box_extend (ChamplainBoundingBox *bbox,
                               gdouble latitude,
                               gdouble longitude);

Extend the bounding box so it contains a point with latitude and longitude . Do nothing if the point is already inside the bounding box.

Parameters

bbox	a ChamplainBoundingBox
latitude	the latitude of the point
longitude	the longitude of the point

Since: 0.10

champlain_bounding_box_is_valid ()

gboolean
champlain_bounding_box_is_valid (ChamplainBoundingBox *bbox);

Checks whether bbox represents a valid bounding box on the map.

Parameters

bbox

a ChamplainBoundingBox

Returns

TRUE when the bounding box is valid, FALSE otherwise.

Since: 0.10

champlain_bounding_box_covers ()

gboolean
champlain_bounding_box_covers (ChamplainBoundingBox *bbox,
                               gdouble latitude,
                               gdouble longitude);

Checks whether bbox covers the given coordinates.

Parameters

bbox	a ChamplainBoundingBox
latitude	the latitude of the point
longitude	the longitude of the point

Returns

TRUE when the bounding box covers given coordinates, FALSE otherwise.

Since: 0.12.4

Types and Values

struct ChamplainBoundingBox

struct ChamplainBoundingBox {
  gdouble left;
  gdouble top;
  gdouble right;
  gdouble bottom;
};

Defines the area of a ChamplainMapDataSource that contains data.

Members

gdouble `left`;	left coordinate
gdouble `top`;	top coordinate
gdouble `right`;	right coordinate
gdouble `bottom`;	bottom coordinate

Since: 0.6