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dragdest: Add a ::drag-enter signal

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Mainly for symmetry with ::drag-leave.
This commit is contained in:
Matthias Clasen 2020-01-08 16:06:57 -05:00
parent 5e57b3d07a
commit 7668669d56
1 changed files with 30 additions and 6 deletions
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36
gtk/gtkdragdest.c
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@ -81,6 +81,7 @@ enum {
static GParamSpec *properties[NUM_PROPERTIES];
enum {
DRAG_ENTER,
DRAG_LEAVE,
DRAG_MOTION,
DRAG_DROP,
@ -223,6 +224,24 @@ gtk_drop_target_class_init (GtkDropTargetClass *class)
g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
/**
* GtkDropTarget::drag-enter:
* @dest: the #GtkDropTarget
* @drop: the #GdkDrop
*
* The ::drag-enter signal is emitted on the drop site when the cursor
* enters the widget.
*/
signals[DRAG_ENTER] =
g_signal_new (I_("drag-enter"),
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GDK_TYPE_DROP);
/**
* GtkDropTarget::drag-leave:
* @dest: the #GtkDropTarget
@ -231,10 +250,6 @@ gtk_drop_target_class_init (GtkDropTargetClass *class)
* The ::drag-leave signal is emitted on the drop site when the cursor
* leaves the widget. A typical reason to connect to this signal is to
* undo things done in #GtkDropTarget::drag-motion, e.g. undo highlighting.
*
* Likewise, the #GtkWidget::drag-leave signal is also emitted before the
* #GtkDropTarget::drag-drop signal, for instance to allow cleaning up of
* a preview item created in the #GtkDropTarget::drag-motion signal handler.
*/
signals[DRAG_LEAVE] =
g_signal_new (I_("drag-leave"),
@ -537,12 +552,20 @@ set_drop (GtkDropTarget *dest,
g_object_add_weak_pointer (G_OBJECT (dest->drop), (gpointer *)&dest->drop);
}
static void
gtk_drop_target_emit_drag_enter (GtkDropTarget *dest,
GdkDrop *drop)
{
set_drop (dest, drop);
g_signal_emit (dest, signals[DRAG_ENTER], 0, drop);
}
static void
gtk_drop_target_emit_drag_leave (GtkDropTarget *dest,
GdkDrop *drop)
{
set_drop (dest, drop);
g_signal_emit (dest, signals[DRAG_LEAVE], 0, drop, time);
g_signal_emit (dest, signals[DRAG_LEAVE], 0, drop);
set_drop (dest, NULL);
}
@ -639,7 +662,6 @@ gtk_drop_set_current_dest (GdkDrop *drop,
if (old_dest == dest)
return;
g_print ("set current dest %p\n", dest);
if (old_dest)
{
gtk_drop_target_set_contains (old_dest, FALSE);
@ -659,6 +681,8 @@ g_print ("set current dest %p\n", dest);
{
g_object_weak_ref (G_OBJECT (dest), clear_current_dest, drop);
gtk_drop_target_emit_drag_enter (dest, drop);
widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
if (widget)
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_DROP_ACTIVE, FALSE);