gtk2/gdk/linux-fb/gdkgeometry-fb.c
2000-06-20 20:20:38 +00:00

50 lines
1.7 KiB
C

#include "gdkprivate-fb.h"
void
gdk_window_scroll (GdkWindow *window,
gint dx,
gint dy)
{
GdkWindowPrivate *private = GDK_WINDOW_P(window);
GdkRegion *invalidate_region;
GdkRectangle dest_rect;
GdkRectangle clip_rect;
GList *tmp_list;
g_return_if_fail (window != NULL);
g_return_if_fail (GDK_IS_WINDOW (window));
if (GDK_DRAWABLE_DESTROYED (window))
return;
clip_rect.x = GDK_DRAWABLE_FBDATA(window)->llim_x - GDK_DRAWABLE_FBDATA(window)->abs_x;
clip_rect.y = GDK_DRAWABLE_FBDATA(window)->llim_y - GDK_DRAWABLE_FBDATA(window)->abs_y;
clip_rect.width = GDK_DRAWABLE_FBDATA(window)->lim_x - GDK_DRAWABLE_FBDATA(window)->llim_x;
clip_rect.height = GDK_DRAWABLE_FBDATA(window)->lim_y - GDK_DRAWABLE_FBDATA(window)->llim_y;
invalidate_region = gdk_region_rectangle (&clip_rect);
dest_rect = clip_rect;
dest_rect.x += dx;
dest_rect.y += dy;
gdk_rectangle_intersect (&dest_rect, &clip_rect, &dest_rect);
if (dest_rect.width > 0 && dest_rect.height > 0)
{
GdkRegion *tmp_region;
tmp_region = gdk_region_rectangle (&dest_rect);
gdk_region_subtract (invalidate_region, tmp_region);
gdk_region_destroy (tmp_region);
gdk_fb_draw_drawable_2(window, NULL, window, dest_rect.x - dx, dest_rect.y - dy, dest_rect.x, dest_rect.y,
dest_rect.width, dest_rect.height,
FALSE, FALSE);
}
gdk_window_invalidate_region (window, invalidate_region, TRUE);
gdk_region_destroy (invalidate_region);
for(tmp_list = private->children; tmp_list; tmp_list = tmp_list->next)
gdk_window_move (tmp_list->data, GDK_WINDOW_P(tmp_list->data)->x + dx, GDK_WINDOW_P(tmp_list->data)->y + dy);
}