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libeek: add eek_element_get_absolute_position()

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This commit is contained in:
Daiki Ueno
2010-06-17 10:27:27 +09:00
parent b92520c488
commit 2877170d2f
2 changed files with 52 additions and 13 deletions
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39
eek/eek-element.c
View File

@ -298,7 +298,9 @@ eek_element_get_name (EekElement *element)
* @element: an #EekElement * @element: an #EekElement
* @bounds: bounding box of @element * @bounds: bounding box of @element
* *
* Set the bounding box of @element to @bounds. * Set the bounding box of @element to @bounds. Note that if @element
* has parent, X and Y positions of @bounds are relative to the parent
* position.
*/ */
void void
eek_element_set_bounds (EekElement *element, eek_element_set_bounds (EekElement *element,
@ -313,7 +315,10 @@ eek_element_set_bounds (EekElement *element,
* @element: an #EekElement * @element: an #EekElement
* @bounds: pointer where bounding box of @element will be stored * @bounds: pointer where bounding box of @element will be stored
* *
* Get the bounding box of @element. * Get the bounding box of @element. Note that if @element has
* parent, X and Y positions of @bounds are relative to the parent
* position. To obtain the absolute position, use
* #eek_element_get_absolute_position().
*/ */
void void
eek_element_get_bounds (EekElement *element, eek_element_get_bounds (EekElement *element,
@ -322,3 +327,33 @@ eek_element_get_bounds (EekElement *element,
g_return_if_fail (EEK_IS_ELEMENT(element)); g_return_if_fail (EEK_IS_ELEMENT(element));
EEK_ELEMENT_GET_CLASS(element)->get_bounds (element, bounds); EEK_ELEMENT_GET_CLASS(element)->get_bounds (element, bounds);
} }
/**
* eek_element_get_absolute_position:
* @element: an #EekElement
* @x: pointer where the X coordinate of @element will be stored
* @y: pointer where the Y coordinate of @element will be stored
*
* Compute the absolute position of @element.
*/
void
eek_element_get_absolute_position (EekElement *element,
gdouble *x,
gdouble *y)
{
EekContainer *parent;
EekBounds bounds;
gdouble ax, ay;
eek_element_get_bounds (element, &bounds);
ax = bounds.x;
ay = bounds.y;
while ((parent = eek_element_get_parent (element)) != NULL) {
eek_element_get_bounds (EEK_ELEMENT(parent), &bounds);
ax += bounds.x;
ay += bounds.y;
element = EEK_ELEMENT(parent);
}
*x = ax;
*y = ay;
}

26
eek/eek-element.h
View File

@ -61,21 +61,25 @@ struct _EekElementClass
EekBounds *bounds); EekBounds *bounds);
}; };
GType eek_element_get_type (void) G_GNUC_CONST; GType eek_element_get_type (void) G_GNUC_CONST;
void eek_element_set_parent (EekElement *element, void eek_element_set_parent (EekElement *element,
EekContainer *parent); EekContainer *parent);
EekContainer *eek_element_get_parent (EekElement *element); EekContainer *eek_element_get_parent (EekElement *element);
void eek_element_set_name (EekElement *element, void eek_element_set_name (EekElement *element,
const gchar *name); const gchar *name);
G_CONST_RETURN gchar *eek_element_get_name (EekElement *element); G_CONST_RETURN gchar *eek_element_get_name (EekElement *element);
void eek_element_set_bounds (EekElement *element, void eek_element_set_bounds (EekElement *element,
EekBounds *bounds); EekBounds *bounds);
void eek_element_get_bounds (EekElement *element, void eek_element_get_bounds (EekElement *element,
EekBounds *bounds); EekBounds *bounds);
void eek_element_get_absolute_position (EekElement *element,
gdouble *x,
gdouble *y);
G_END_DECLS G_END_DECLS
#endif /* EEK_ELEMENT_H */ #endif /* EEK_ELEMENT_H */