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GtkOverlay: Add support for input pass-through overlays

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For these widgets we set pass-through on the child window so that
input over these widgets (that are not on a child input window) goes
to the window below the overlay.

https://bugzilla.gnome.org/show_bug.cgi?id=750568

https://bugs.freedesktop.org/show_bug.cgi?id=90917
This commit is contained in:
Alexander Larsson 2015-06-09 10:26:31 +02:00
parent 76ba5a03b9
commit 4dd66b0c53
2 changed files with 73 additions and 0 deletions
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70
gtk/gtkoverlay.c
View File

@ -64,6 +64,7 @@ struct _GtkOverlayChild
{
GtkWidget *widget;
GdkWindow *window;
gboolean pass_through;
};
enum {
@ -74,6 +75,7 @@ enum {
enum
{
CHILD_PROP_0,
CHILD_PROP_PASS_THROUGH,
CHILD_PROP_INDEX
};
@ -156,6 +158,8 @@ gtk_overlay_create_child_window (GtkOverlay *overlay,
gtk_widget_register_window (widget, window);
gtk_style_context_set_background (gtk_widget_get_style_context (widget), window);
gdk_window_set_pass_through (window, child->pass_through);
gtk_widget_set_parent_window (child->widget, window);
return window;
@ -672,6 +676,19 @@ gtk_overlay_set_child_property (GtkContainer *container,
switch (property_id)
{
case CHILD_PROP_PASS_THROUGH:
/* Ignore value on main child */
if (child_info)
{
if (g_value_get_boolean (value) != child_info->pass_through)
{
child_info->pass_through = g_value_get_boolean (value);
if (child_info->window)
gdk_window_set_pass_through (child_info->window, child_info->pass_through);
gtk_container_child_notify (container, child, "pass-through");
}
}
break;
case CHILD_PROP_INDEX:
if (child_info != NULL)
gtk_overlay_reorder_overlay (GTK_OVERLAY (container),
@ -712,6 +729,12 @@ gtk_overlay_get_child_property (GtkContainer *container,
switch (property_id)
{
case CHILD_PROP_PASS_THROUGH:
if (child_info)
g_value_set_boolean (value, child_info->pass_through);
else
g_value_set_boolean (value, FALSE);
break;
case CHILD_PROP_INDEX:
g_value_set_int (value, g_slist_index (priv->children, child_info));
break;
@ -742,6 +765,10 @@ gtk_overlay_class_init (GtkOverlayClass *klass)
klass->get_child_position = gtk_overlay_get_child_position;
gtk_container_class_install_child_property (container_class, CHILD_PROP_PASS_THROUGH,
g_param_spec_boolean ("pass-through", P_("Pass Through"), P_("Pass through input, does not affect main child"),
FALSE,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class, CHILD_PROP_INDEX,
g_param_spec_int ("index",
P_("Index"),
@ -867,3 +894,46 @@ gtk_overlay_add_overlay (GtkOverlay *overlay,
gtk_widget_child_notify (widget, "index");
}
/**
* gtk_overlay_add_pass_through_overlay:
* @overlay: a #GtkOverlay
* @widget: a #GtkWidget to be added to the container
*
* Adds @widget to @overlay, allowing input to fall through
* to the main child in non-interactive areas.
*
* The widget will be stacked on top of the main widget
* added with gtk_container_add().
*
* The position at which @widget is placed is determined
* from its #GtkWidget:halign and #GtkWidget:valign properties.
*
* Since: 3.18
*/
void
gtk_overlay_add_pass_through_overlay (GtkOverlay *overlay,
GtkWidget *widget)
{
GtkOverlayPrivate *priv = overlay->priv;
GtkOverlayChild *child;
g_return_if_fail (GTK_IS_OVERLAY (overlay));
g_return_if_fail (GTK_IS_WIDGET (widget));
child = g_slice_new0 (GtkOverlayChild);
child->widget = widget;
child->pass_through = TRUE;
priv->children = g_slist_append (priv->children, child);
if (gtk_widget_get_realized (GTK_WIDGET (overlay)))
{
child->window = gtk_overlay_create_child_window (overlay, child);
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
}
else
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
gtk_widget_child_notify (widget, "index");
}

3
gtk/gtkoverlay.h
View File

@ -84,6 +84,9 @@ GDK_AVAILABLE_IN_3_2
void gtk_overlay_add_overlay (GtkOverlay *overlay,
GtkWidget *widget);
GDK_AVAILABLE_IN_3_18
void gtk_overlay_add_pass_through_overlay (GtkOverlay *overlay,
GtkWidget *widget);
GDK_AVAILABLE_IN_3_18
void gtk_overlay_reorder_overlay (GtkOverlay *overlay,
GtkWidget *child,
gint position);