Hi folks,
I'm trying to understand how drag and drop works with
when both containers and some of their children accept
drags. It seems that if a widget accepts any drags of
any type, it blocks drags to parent widgets, even if
it doesn't accept that type of data.
I've attached a sample program that illustrates this.
It has a container that accepts drags of text/uri-list
type, and in that container is a GtkColorButton, which
has a built-in handler for application/x-color.
If you drag a file anywhere not over the color button,
you can drop it. But you can't drop if you're over
the color button. What I would like is for the color
button to completely ignore that drag and let it be
handled by the parent container.
Is this at all possible?
--
Shaun
#include <gtk/gtk.h>
enum {
DRAG_TYPE_URI_LIST
};
static const GtkTargetEntry drag_types[] = {
{ "text/uri-list", 0, DRAG_TYPE_URI_LIST },
};
static void
drag_data_received (GtkWidget *widget,
GdkDragContext *context,
int x,
int y,
GtkSelectionData *selection,
guint info,
guint time,
gpointer data)
{
printf ("%s\n", gtk_selection_data_get_data (selection));
}
int main (int argc, char **argv)
{
GtkWidget *window, *vbox, *label, *button;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 400, 200);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_main_quit), NULL);
vbox = gtk_vbox_new (FALSE, 12);
g_object_set (vbox, "border-width", 6, NULL);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_drag_dest_set (vbox,
GTK_DEST_DEFAULT_ALL,
drag_types, G_N_ELEMENTS (drag_types),
GDK_ACTION_COPY);
g_signal_connect_after (vbox,
"drag-data-received",
G_CALLBACK (drag_data_received),
NULL);
label = gtk_label_new ("Drag a file anywhere on this window.");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
button = gtk_color_button_new ();
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_widget_show_all (window);
gtk_main ();
}
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