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Add gtk_widget_set_device_enabled()

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This function is a more convenient variant than
gtk_widget_set_device_events(), as it will

1) perform changes down a widget hierarchy, to
all windows.
1) use the same event mask than gdk_window_get_events()
This commit is contained in:
Carlos Garnacho 2011-01-10 22:57:31 +01:00
parent c94912afd5
commit fa2bfd93f8
4 changed files with 168 additions and 1 deletions
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2
docs/reference/gtk/gtk3-sections.txt
View File

@ -4975,6 +4975,8 @@ gtk_widget_add_events
gtk_widget_set_device_events
gtk_widget_get_device_events
gtk_widget_add_device_events
gtk_widget_set_device_enabled
gtk_widget_get_device_enabled
gtk_widget_get_toplevel
gtk_widget_get_ancestor
gtk_widget_get_visual

2
gtk/gtk.symbols
View File

@ -3469,6 +3469,7 @@ gtk_widget_get_clipboard
gtk_widget_get_composite_name
gtk_widget_get_default_direction
gtk_widget_get_default_style
gtk_widget_get_device_enabled
gtk_widget_get_device_events
gtk_widget_get_direction
gtk_widget_get_display
@ -3615,6 +3616,7 @@ gtk_widget_set_can_focus
gtk_widget_set_child_visible
gtk_widget_set_composite_name
gtk_widget_set_default_direction
gtk_widget_set_device_enabled
gtk_widget_set_device_events
gtk_widget_set_direction
gtk_widget_set_double_buffered

156
gtk/gtkwidget.c
View File

@ -663,6 +663,10 @@ static void gtk_widget_set_usize_internal (GtkWidget *widget,
static void gtk_widget_add_events_internal (GtkWidget *widget,
GdkDevice *device,
gint events);
static void gtk_widget_set_device_enabled_internal (GtkWidget *widget,
GdkDevice *device,
gboolean recurse,
gboolean enabled);
/* --- variables --- */
static gpointer gtk_widget_parent_class = NULL;
@ -691,6 +695,7 @@ static GQuark quark_has_tooltip = 0;
static GQuark quark_tooltip_window = 0;
static GQuark quark_visual = 0;
static GQuark quark_modifier_style = 0;
static GQuark quark_enabled_devices = 0;
GParamSpecPool *_gtk_widget_child_property_pool = NULL;
GObjectNotifyContext *_gtk_widget_child_property_notify_context = NULL;
@ -804,6 +809,7 @@ gtk_widget_class_init (GtkWidgetClass *klass)
quark_tooltip_window = g_quark_from_static_string ("gtk-tooltip-window");
quark_visual = g_quark_from_static_string ("gtk-widget-visual");
quark_modifier_style = g_quark_from_static_string ("gtk-widget-modifier-style");
quark_enabled_devices = g_quark_from_static_string ("gtk-widget-enabled-devices");
style_property_spec_pool = g_param_spec_pool_new (FALSE);
_gtk_widget_child_property_pool = g_param_spec_pool_new (TRUE);
@ -4222,6 +4228,105 @@ _gtk_widget_enable_device_events (GtkWidget *widget)
}
}
static GList *
get_widget_windows (GtkWidget *widget)
{
GList *window_list, *last, *l, *children, *ret;
if (gtk_widget_get_has_window (widget))
window_list = g_list_prepend (NULL, gtk_widget_get_window (widget));
else
window_list = gdk_window_peek_children (gtk_widget_get_window (widget));
last = g_list_last (window_list);
ret = NULL;
for (l = window_list; l; l = l->next)
{
GtkWidget *window_widget;
gdk_window_get_user_data (l->data, (gpointer *) window_widget);
if (widget != window_widget)
continue;
ret = g_list_prepend (ret, l->data);
children = gdk_window_peek_children (GDK_WINDOW (l->data));
if (children)
{
last = g_list_concat (last, children);
last = g_list_last (last);
}
}
g_list_free (window_list);
return ret;
}
static void
device_enable_foreach (GtkWidget *widget,
gpointer user_data)
{
GdkDevice *device = user_data;
gtk_widget_set_device_enabled_internal (widget, device, TRUE, TRUE);
}
static void
device_disable_foreach (GtkWidget *widget,
gpointer user_data)
{
GdkDevice *device = user_data;
gtk_widget_set_device_enabled_internal (widget, device, TRUE, FALSE);
}
static void
gtk_widget_set_device_enabled_internal (GtkWidget *widget,
GdkDevice *device,
gboolean recurse,
gboolean enabled)
{
GList *window_list, *l;
window_list = get_widget_windows (widget);
for (l = window_list; l; l = l->next)
{
GdkEventMask events = 0;
GdkWindow *window;
window = l->data;
if (enabled)
events = gdk_window_get_events (window);
gdk_window_set_device_events (window, device, events);
}
if (recurse && GTK_IS_CONTAINER (widget))
{
if (enabled)
gtk_container_forall (GTK_CONTAINER (widget), device_enable_foreach, device);
else
gtk_container_forall (GTK_CONTAINER (widget), device_disable_foreach, device);
}
g_list_free (window_list);
}
static void
gtk_widget_update_devices_mask (GtkWidget *widget,
gboolean recurse)
{
GList *enabled_devices, *l;
enabled_devices = g_object_get_qdata (G_OBJECT (widget), quark_enabled_devices);
for (l = enabled_devices; l; l = l->next)
gtk_widget_set_device_enabled_internal (widget, GDK_DEVICE (l->data), recurse, TRUE);
}
/**
* gtk_widget_realize:
* @widget: a #GtkWidget
@ -4300,6 +4405,7 @@ gtk_widget_realize (GtkWidget *widget)
gdk_window_set_support_multidevice (priv->window, TRUE);
_gtk_widget_enable_device_events (widget);
gtk_widget_update_devices_mask (widget, TRUE);
gtk_widget_pop_verify_invariants (widget);
}
@ -9749,6 +9855,53 @@ gtk_widget_set_device_events (GtkWidget *widget,
g_hash_table_insert (device_events, device, GUINT_TO_POINTER (events));
}
/**
* gtk_widget_enable_device:
* @widget: a #GtkWidget
* @device: a #GdkDevice
*
* Enables a #GdkDevice to interact with @widget and
* all its children, it does so by descending through
* the #GdkWindow hierarchy and enabling the same mask
* that is has for core events (i.e. the one that
* gdk_window_get_events() returns).
*
* Since: 3.0
**/
void
gtk_widget_set_device_enabled (GtkWidget *widget,
GdkDevice *device,
gboolean enabled)
{
GList *enabled_devices;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GDK_IS_DEVICE (device));
enabled_devices = g_object_get_qdata (G_OBJECT (widget), quark_enabled_devices);
enabled_devices = g_list_append (enabled_devices, device);
g_object_set_qdata_full (G_OBJECT (widget), quark_enabled_devices,
enabled_devices, (GDestroyNotify) g_list_free);;
if (gtk_widget_get_realized (widget))
gtk_widget_set_device_enabled_internal (widget, device, TRUE, enabled);
}
gboolean
gtk_widget_get_device_enabled (GtkWidget *widget,
GdkDevice *device)
{
GList *enabled_devices;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GDK_IS_DEVICE (device), FALSE);
enabled_devices = g_object_get_qdata (G_OBJECT (widget), quark_enabled_devices);
return g_list_find (enabled_devices, device) != NULL;
}
static void
gtk_widget_add_events_internal_list (GtkWidget *widget,
GdkDevice *device,
@ -9818,7 +9971,10 @@ gtk_widget_add_events (GtkWidget *widget,
GINT_TO_POINTER (old_events | events));
if (gtk_widget_get_realized (widget))
{
gtk_widget_add_events_internal (widget, NULL, events);
gtk_widget_update_devices_mask (widget, FALSE);
}
g_object_notify (G_OBJECT (widget), "events");
}

7
gtk/gtkwidget.h
View File

@ -674,6 +674,13 @@ void gtk_widget_set_device_events (GtkWidget *widget,
void gtk_widget_add_device_events (GtkWidget *widget,
GdkDevice *device,
GdkEventMask events);
void gtk_widget_set_device_enabled (GtkWidget *widget,
GdkDevice *device,
gboolean enabled);
gboolean gtk_widget_get_device_enabled (GtkWidget *widget,
GdkDevice *device);
GtkWidget* gtk_widget_get_toplevel (GtkWidget *widget);
GtkWidget* gtk_widget_get_ancestor (GtkWidget *widget,
GType widget_type);