* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
*
* GtkOverlay is a container which contains a single main child, on top
* of which it can place <firstterm>overlay</firstterm> widgets. The
- * position of each overlay widget is determined by its #GtkWidget::halign
- * and #GtkWidget::valign properties. E.g. a widget with both alignments
+ * position of each overlay widget is determined by its #GtkWidget:halign
+ * and #GtkWidget:valign properties. E.g. a widget with both alignments
* set to %GTK_ALIGN_START will be placed at the top left corner of the
* main widget, whereas an overlay with halign set to %GTK_ALIGN_CENTER
* and valign set to %GTK_ALIGN_END will be placed a the bottom edge of
window = gdk_window_new (gtk_widget_get_window (widget),
&attributes, attributes_mask);
- gdk_window_set_user_data (window, overlay);
+ gtk_widget_register_window (widget, window);
gtk_style_context_set_background (gtk_widget_get_style_context (widget), window);
gtk_widget_set_parent_window (child, window);
return window;
}
+static GtkAlign
+effective_align (GtkAlign align,
+ GtkTextDirection direction)
+{
+ switch (align)
+ {
+ case GTK_ALIGN_START:
+ return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
+ case GTK_ALIGN_END:
+ return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
+ default:
+ return align;
+ }
+}
+
+static void
+gtk_overlay_get_main_widget_allocation (GtkOverlay *overlay,
+ GtkAllocation *main_alloc_out)
+{
+ GtkWidget *main_widget;
+ GtkAllocation main_alloc;
+
+ main_widget = gtk_bin_get_child (GTK_BIN (overlay));
+
+ /* special-case scrolled windows */
+ if (GTK_IS_SCROLLED_WINDOW (main_widget))
+ {
+ GtkWidget *grandchild;
+ gint x, y;
+ gboolean res;
+
+ grandchild = gtk_bin_get_child (GTK_BIN (main_widget));
+ res = gtk_widget_translate_coordinates (grandchild, main_widget, 0, 0, &x, &y);
+
+ if (res)
+ {
+ main_alloc.x = x;
+ main_alloc.y = y;
+ }
+ else
+ {
+ main_alloc.x = 0;
+ main_alloc.y = 0;
+ }
+
+ main_alloc.width = gtk_widget_get_allocated_width (grandchild);
+ main_alloc.height = gtk_widget_get_allocated_height (grandchild);
+ }
+ else
+ {
+ main_alloc.x = 0;
+ main_alloc.y = 0;
+ main_alloc.width = gtk_widget_get_allocated_width (main_widget);
+ main_alloc.height = gtk_widget_get_allocated_height (main_widget);
+ }
+
+ if (main_alloc_out)
+ *main_alloc_out = main_alloc;
+}
+
+static void
+gtk_overlay_child_update_style_classes (GtkOverlay *overlay,
+ GtkWidget *child,
+ GtkAllocation *child_allocation)
+{
+ GtkAllocation overlay_allocation, main_allocation;
+ GtkAlign valign, halign;
+ gboolean is_left, is_right, is_top, is_bottom;
+ gboolean has_left, has_right, has_top, has_bottom;
+ GtkStyleContext *context;
+
+ context = gtk_widget_get_style_context (child);
+ has_left = gtk_style_context_has_class (context, GTK_STYLE_CLASS_LEFT);
+ has_right = gtk_style_context_has_class (context, GTK_STYLE_CLASS_RIGHT);
+ has_top = gtk_style_context_has_class (context, GTK_STYLE_CLASS_TOP);
+ has_bottom = gtk_style_context_has_class (context, GTK_STYLE_CLASS_BOTTOM);
+
+ is_left = is_right = is_top = is_bottom = FALSE;
+
+ gtk_overlay_get_main_widget_allocation (overlay, &main_allocation);
+ gtk_widget_get_allocation (GTK_WIDGET (overlay), &overlay_allocation);
+
+ main_allocation.x += overlay_allocation.x;
+ main_allocation.y += overlay_allocation.y;
+
+ halign = effective_align (gtk_widget_get_halign (child),
+ gtk_widget_get_direction (child));
+
+ if (halign == GTK_ALIGN_START)
+ is_left = (child_allocation->x == main_allocation.x);
+ else if (halign == GTK_ALIGN_END)
+ is_right = (child_allocation->x + child_allocation->width ==
+ main_allocation.x + main_allocation.width);
+
+ valign = gtk_widget_get_valign (child);
+
+ if (valign == GTK_ALIGN_START)
+ is_top = (child_allocation->y == main_allocation.y);
+ else if (valign == GTK_ALIGN_END)
+ is_bottom = (child_allocation->y + child_allocation->height ==
+ main_allocation.y + main_allocation.height);
+
+ if (has_left && !is_left)
+ gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
+ else if (!has_left && is_left)
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
+
+ if (has_right && !is_right)
+ gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
+ else if (!has_right && is_right)
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
+
+ if (has_top && !is_top)
+ gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
+ else if (!has_top && is_top)
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
+
+ if (has_bottom && !is_bottom)
+ gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
+ else if (!has_bottom && is_bottom)
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
+}
+
static void
gtk_overlay_child_allocate (GtkOverlay *overlay,
GtkOverlayChild *child)
allocation.x, allocation.y,
allocation.width, allocation.height);
+ gtk_overlay_child_update_style_classes (overlay, child->widget, &allocation);
gtk_widget_size_allocate (child->widget, &child_allocation);
}
}
}
-static GtkAlign
-effective_align (GtkAlign align,
- GtkTextDirection direction)
-{
- switch (align)
- {
- case GTK_ALIGN_START:
- return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
- case GTK_ALIGN_END:
- return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
- default:
- return align;
- }
-}
-
static gboolean
gtk_overlay_get_child_position (GtkOverlay *overlay,
GtkWidget *widget,
GtkAllocation *alloc)
{
- GtkWidget *main_widget;
GtkAllocation main_alloc;
GtkRequisition req;
GtkAlign halign;
GtkTextDirection direction;
- main_widget = gtk_bin_get_child (GTK_BIN (overlay));
-
- /* special-case scrolled windows */
- if (GTK_IS_SCROLLED_WINDOW (main_widget))
- {
- GtkWidget *grandchild;
- gint x, y;
-
- grandchild = gtk_bin_get_child (GTK_BIN (main_widget));
- gtk_widget_translate_coordinates (grandchild, main_widget, 0, 0, &x, &y);
-
- main_alloc.x = x;
- main_alloc.y = y;
- main_alloc.width = gtk_widget_get_allocated_width (grandchild);
- main_alloc.height = gtk_widget_get_allocated_height (grandchild);
- }
- else
- {
- main_alloc.x = 0;
- main_alloc.y = 0;
- main_alloc.width = gtk_widget_get_allocated_width (main_widget);
- main_alloc.height = gtk_widget_get_allocated_height (main_widget);
- }
-
+ gtk_overlay_get_main_widget_allocation (overlay, &main_alloc);
gtk_widget_get_preferred_size (widget, NULL, &req);
alloc->x = main_alloc.x;
child = children->data;
if (child->window == NULL)
- child->window = gtk_overlay_create_child_window (overlay, child->widget);
+ {
+ child->window = gtk_overlay_create_child_window (overlay, child->widget);
+ gtk_overlay_child_allocate (overlay, child);
+ }
}
}
child = children->data;
gtk_widget_set_parent_window (child->widget, NULL);
- gdk_window_set_user_data (child->window, NULL);
+ gtk_widget_unregister_window (widget, child->window);
gdk_window_destroy (child->window);
child->window = NULL;
}
{
if (child->window != NULL)
{
- gdk_window_set_user_data (child->window, NULL);
+ gtk_widget_unregister_window (GTK_WIDGET (container), child->window);
gdk_window_destroy (child->window);
}
* GtkOverlay::get-child-position:
* @overlay: the #GtkOverlay
* @widget: the child widget to position
- * @allocation: (out): return location for the allocation
+ * @allocation: (out caller-allocates): return location for the allocation
*
* The ::get-child-position signal is emitted to determine
* the position and size of any overlay child widgets. A
* added with gtk_container_add().
*
* The position at which @widget is placed is determined
- * from its #GtkWidget::halign and #GtkWidget::valign properties.
+ * from its #GtkWidget:halign and #GtkWidget:valign properties.
*
* Since: 3.2
*/
{
child->window = gtk_overlay_create_child_window (overlay, widget);
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
+ gtk_overlay_child_allocate (overlay, child);
}
else
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
projects / ~andy / gtk / blobdiff