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listbase: Autoscroll during DND

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Use a drop motion controller to autoscroll while
a drag operation is hovering over the list.
This commit is contained in:
Matthias Clasen 2020-06-19 08:18:54 -04:00
parent e8ba16d9c2
commit 4e56581222
1 changed files with 27 additions and 0 deletions
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27
gtk/gtklistbase.c
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@ -22,6 +22,7 @@
#include "gtklistbaseprivate.h"
#include "gtkadjustment.h"
#include "gtkdropcontrollermotion.h"
#include "gtkgesturedrag.h"
#include "gtkgizmoprivate.h"
#include "gtkintl.h"
@ -1585,11 +1586,32 @@ gtk_list_base_get_enable_rubberband (GtkListBase *self)
return priv->enable_rubberband;
}
static void
gtk_list_base_drag_motion (GtkDropControllerMotion *motion,
double x,
double y,
gpointer unused)
{
GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (motion));
update_autoscroll (GTK_LIST_BASE (widget), x, y);
}
static void
gtk_list_base_drag_leave (GtkDropControllerMotion *motion,
gpointer unused)
{
GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (motion));
remove_autoscroll (GTK_LIST_BASE (widget));
}
static void
gtk_list_base_init_real (GtkListBase *self,
GtkListBaseClass *g_class)
{
GtkListBasePrivate *priv = gtk_list_base_get_instance_private (self);
GtkEventController *controller;
priv->item_manager = gtk_list_item_manager_new_for_size (GTK_WIDGET (self),
g_class->list_item_name,
@ -1609,6 +1631,11 @@ gtk_list_base_init_real (GtkListBase *self,
gtk_widget_set_overflow (GTK_WIDGET (self), GTK_OVERFLOW_HIDDEN);
gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
controller = gtk_drop_controller_motion_new ();
g_signal_connect (controller, "motion", G_CALLBACK (gtk_list_base_drag_motion), NULL);
g_signal_connect (controller, "leave", G_CALLBACK (gtk_list_base_drag_leave), NULL);
gtk_widget_add_controller (GTK_WIDGET (self), controller);
}
static int