112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
|
#include "st-private.h"
|
||
|
|
|
||
|
|
/* Utility function to modify a child allocation box with respect to the
|
||
|
|
* x/y-fill child properties. Expects childbox to contain the available
|
||
|
|
* allocation space.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
_st_allocate_fill (ClutterActor *child,
|
||
|
|
ClutterActorBox *childbox,
|
||
|
|
StAlign x_alignment,
|
||
|
|
StAlign y_alignment,
|
||
|
|
gboolean x_fill,
|
||
|
|
gboolean y_fill)
|
||
|
|
{
|
||
|
|
gfloat natural_width, natural_height;
|
||
|
|
gfloat min_width, min_height;
|
||
|
|
gfloat child_width, child_height;
|
||
|
|
gfloat available_width, available_height;
|
||
|
|
ClutterRequestMode request;
|
||
|
|
ClutterActorBox allocation = { 0, };
|
||
|
|
gdouble x_align, y_align;
|
||
|
|
|
||
|
|
if (x_alignment == ST_ALIGN_START)
|
||
|
|
x_align = 0.0;
|
||
|
|
else if (x_alignment == ST_ALIGN_MIDDLE)
|
||
|
|
x_align = 0.5;
|
||
|
|
else
|
||
|
|
x_align = 1.0;
|
||
|
|
|
||
|
|
if (y_alignment == ST_ALIGN_START)
|
||
|
|
y_align = 0.0;
|
||
|
|
else if (y_alignment == ST_ALIGN_MIDDLE)
|
||
|
|
y_align = 0.5;
|
||
|
|
else
|
||
|
|
y_align = 1.0;
|
||
|
|
|
||
|
|
available_width = childbox->x2 - childbox->x1;
|
||
|
|
available_height = childbox->y2 - childbox->y1;
|
||
|
|
|
||
|
|
if (available_width < 0)
|
||
|
|
available_width = 0;
|
||
|
|
|
||
|
|
if (available_height < 0)
|
||
|
|
available_height = 0;
|
||
|
|
|
||
|
|
if (x_fill)
|
||
|
|
{
|
||
|
|
allocation.x1 = childbox->x1;
|
||
|
|
allocation.x2 = (int)(allocation.x1 + available_width);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (y_fill)
|
||
|
|
{
|
||
|
|
allocation.y1 = childbox->y1;
|
||
|
|
allocation.y2 = (int)(allocation.y1 + available_height);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if we are filling horizontally and vertically then we're done */
|
||
|
|
if (x_fill && y_fill)
|
||
|
|
{
|
||
|
|
*childbox = allocation;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
request = CLUTTER_REQUEST_HEIGHT_FOR_WIDTH;
|
||
|
|
g_object_get (G_OBJECT (child), "request-mode", &request, NULL);
|
||
|
|
|
||
|
|
if (request == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
|
||
|
|
{
|
||
|
|
clutter_actor_get_preferred_width (child, available_height,
|
||
|
|
&min_width,
|
||
|
|
&natural_width);
|
||
|
|
|
||
|
|
child_width = CLAMP (natural_width, min_width, available_width);
|
||
|
|
|
||
|
|
clutter_actor_get_preferred_height (child, child_width,
|
||
|
|
&min_height,
|
||
|
|
&natural_height);
|
||
|
|
|
||
|
|
child_height = CLAMP (natural_height, min_height, available_height);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
clutter_actor_get_preferred_height (child, available_width,
|
||
|
|
&min_height,
|
||
|
|
&natural_height);
|
||
|
|
|
||
|
|
child_height = CLAMP (natural_height, min_height, available_height);
|
||
|
|
|
||
|
|
clutter_actor_get_preferred_width (child, child_height,
|
||
|
|
&min_width,
|
||
|
|
&natural_width);
|
||
|
|
|
||
|
|
child_width = CLAMP (natural_width, min_width, available_width);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!x_fill)
|
||
|
|
{
|
||
|
|
allocation.x1 = childbox->x1 + (int)((available_width - child_width) * x_align);
|
||
|
|
allocation.x2 = allocation.x1 + (int) child_width;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!y_fill)
|
||
|
|
{
|
||
|
|
allocation.y1 = childbox->y1 + (int)((available_height - child_height) * y_align);
|
||
|
|
allocation.y2 = allocation.y1 + (int) child_height;
|
||
|
|
}
|
||
|
|
|
||
|
|
*childbox = allocation;
|
||
|
|
|
||
|
|
}
|