static void
cinnamon_tray_manager_child_on_realize (GtkWidget *widget,
CinnamonTrayManagerChild *child)
{
/* If the tray child is using an RGBA colormap (and so we have real
* transparency), we don't need to worry about the background. If
* not, we obey the bg-color property by creating a cairo pattern of
* that color and setting it as our background. Then "parent-relative"
* background on the socket and the plug within that will cause
* the icons contents to appear on top of our background color.
*/
if (!na_tray_child_has_alpha (NA_TRAY_CHILD (child->socket)))
{
ClutterColor color = child->manager->priv->bg_color;
cairo_pattern_t *bg_pattern;
bg_pattern = cairo_pattern_create_rgb (color.red / 255.,
color.green / 255.,
color.blue / 255.);
gdk_window_set_background_pattern (gtk_widget_get_window (widget),
bg_pattern);
cairo_pattern_destroy (bg_pattern);
}
}
/* The plug window should completely occupy the area of the child, so we won't
* get an expose event. But in case we do (the plug unmaps itself, say), this
* expose handler draws with real or fake transparency.
*/
static gboolean
na_tray_child_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
NaTrayChild *child = NA_TRAY_CHILD (widget);
GdkWindow *window = gtk_widget_get_window (widget);
if (na_tray_child_has_alpha (child))
{
/* Clear to transparent */
cairo_t *cr = gdk_cairo_create (window);
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
gdk_cairo_region (cr, event->region);
cairo_fill (cr);
cairo_destroy (cr);
}
else if (child->parent_relative_bg)
{
/* Clear to parent-relative pixmap */
gdk_window_clear_area (window,
event->area.x, event->area.y,
event->area.width, event->area.height);
}
return FALSE;
}
na_tray_child_expose_event (GtkWidget *widget,
GdkEventExpose *event)
#endif
{
NaTrayChild *child = NA_TRAY_CHILD (widget);
GdkWindow *window = gtk_widget_get_window (widget);
if (na_tray_child_has_alpha (child))
{
/* Clear to transparent */
#if !GTK_CHECK_VERSION (3, 0, 0)
cairo_t *cr = gdk_cairo_create (window);
#endif
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
#if GTK_CHECK_VERSION (3, 0, 0)
cairo_paint (cr);
#else
gdk_cairo_region (cr, event->region);
cairo_fill (cr);
cairo_destroy (cr);
#endif
}
else if (child->parent_relative_bg)
{
/* Clear to parent-relative pixmap */
#if GTK_CHECK_VERSION (3, 0, 0)
GdkWindow *window;
cairo_surface_t *target;
GdkRectangle clip_rect;
window = gtk_widget_get_window (widget);
target = cairo_get_group_target (cr);
gdk_cairo_get_clip_rectangle (cr, &clip_rect);
/* Clear to parent-relative pixmap
* We need to use direct X access here because GDK doesn't know about
* the parent relative pixmap. */
cairo_surface_flush (target);
XClearArea (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
clip_rect.x, clip_rect.y,
clip_rect.width, clip_rect.height,
False);
cairo_surface_mark_dirty_rectangle (target,
clip_rect.x, clip_rect.y,
clip_rect.width, clip_rect.height);
#else
gdk_window_clear_area (window,
event->area.x, event->area.y,
event->area.width, event->area.height);
#endif
}
return FALSE;
}
static void
na_tray_child_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
NaTrayChild *child = NA_TRAY_CHILD (widget);
GtkAllocation widget_allocation;
gboolean moved, resized;
gtk_widget_get_allocation (widget, &widget_allocation);
moved = (allocation->x != widget_allocation.x ||
allocation->y != widget_allocation.y);
resized = (allocation->width != widget_allocation.width ||
allocation->height != widget_allocation.height);
/* When we are allocating the widget while mapped we need special handling
* for both real and fake transparency.
*
* Real transparency: we need to invalidate and trigger a redraw of the old
* and new areas. (GDK really should handle this for us, but doesn't as of
* GTK+-2.14)
*
* Fake transparency: if the widget moved, we need to force the contents to
* be redrawn with the new offset for the parent-relative background.
*/
if ((moved || resized) && gtk_widget_get_mapped (widget))
{
if (na_tray_child_has_alpha (child))
gdk_window_invalidate_rect (gdk_window_get_parent (gtk_widget_get_window (widget)),
&widget_allocation, FALSE);
}
GTK_WIDGET_CLASS (na_tray_child_parent_class)->size_allocate (widget,
allocation);
if ((moved || resized) && gtk_widget_get_mapped (widget))
{
if (na_tray_child_has_alpha (NA_TRAY_CHILD (widget)))
gdk_window_invalidate_rect (gdk_window_get_parent (gtk_widget_get_window (widget)),
&widget_allocation, FALSE);
else if (moved && child->parent_relative_bg)
na_tray_child_force_redraw (child);
}
}
/* The plug window should completely occupy the area of the child, so we won't
* get a draw event. But in case we do (the plug unmaps itself, say), this
* draw handler draws with real or fake transparency.
*/
static gboolean
na_tray_child_draw (GtkWidget *widget,
cairo_t *cr)
{
NaTrayChild *child = NA_TRAY_CHILD (widget);
if (na_tray_child_has_alpha (child))
{
/* Clear to transparent */
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
}
else if (child->parent_relative_bg)
{
GdkWindow *window;
cairo_surface_t *target;
GdkRectangle clip_rect;
window = gtk_widget_get_window (widget);
target = cairo_get_group_target (cr);
gdk_cairo_get_clip_rectangle (cr, &clip_rect);
/* Clear to parent-relative pixmap
* We need to use direct X access here because GDK doesn't know about
* the parent relative pixmap. */
cairo_surface_flush (target);
XClearArea (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
clip_rect.x, clip_rect.y,
clip_rect.width, clip_rect.height,
False);
cairo_surface_mark_dirty_rectangle (target,
clip_rect.x, clip_rect.y,
clip_rect.width, clip_rect.height);
}
return FALSE;
}
