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gtk-demo: Convert the clipboard demo to GtkDragSource

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This commit is contained in:
Matthias Clasen
2019-12-31 20:30:32 -05:00
parent 783af4c868
commit 9d65f8d5b2
1 changed files with 22 additions and 25 deletions
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47
demos/gtk-demo/clipboard.c
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@@ -119,32 +119,27 @@ get_image_paintable (GtkImage *image)
}
static void
drag_begin (GtkWidget *widget,
GdkDrag *drag,
gpointer data)
drag_begin (GtkDragSource *source,
GtkWidget *widget)
{
GdkPaintable *paintable;
paintable = get_image_paintable (GTK_IMAGE (widget));
if (paintable)
{
gtk_drag_set_icon_paintable (drag, paintable, -2, -2);
gtk_drag_source_set_icon (source, paintable, -2, -2);
g_object_unref (paintable);
}
}
void
drag_data_get (GtkWidget *widget,
GdkDrag *drag,
GtkSelectionData *selection_data,
guint info,
gpointer data)
static void
get_texture (GValue *value,
gpointer data)
{
GdkPaintable *paintable;
GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (data));
paintable = get_image_paintable (GTK_IMAGE (widget));
if (GDK_IS_TEXTURE (paintable))
gtk_selection_data_set_texture (selection_data, GDK_TEXTURE (paintable));
g_value_set_object (value, paintable);
}
static void
@@ -247,6 +242,8 @@ do_clipboard (GtkWidget *do_widget)
{ "paste", paste_image, NULL, NULL, NULL },
};
GActionGroup *actions;
GdkContentProvider *content = NULL;
GtkDragSource *source;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_display (GTK_WINDOW (window),
@@ -305,15 +302,15 @@ do_clipboard (GtkWidget *do_widget)
/* Create the first image */
image = gtk_image_new_from_icon_name ("dialog-warning");
gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
gtk_container_add (GTK_CONTAINER (hbox), image);
/* make image a drag source */
gtk_drag_source_set (image, GDK_BUTTON1_MASK, NULL, GDK_ACTION_COPY);
gtk_drag_source_add_image_targets (image);
g_signal_connect (image, "drag-begin",
G_CALLBACK (drag_begin), image);
g_signal_connect (image, "drag-data-get",
G_CALLBACK (drag_data_get), image);
content = gdk_content_provider_new_with_callback (GDK_TYPE_TEXTURE, get_texture, image);
source = gtk_drag_source_new (content, GDK_ACTION_COPY);
g_object_unref (content);
gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
/* accept drops on image */
gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,
@@ -337,15 +334,15 @@ do_clipboard (GtkWidget *do_widget)
/* Create the second image */
image = gtk_image_new_from_icon_name ("process-stop");
gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
gtk_container_add (GTK_CONTAINER (hbox), image);
/* make image a drag source */
gtk_drag_source_set (image, GDK_BUTTON1_MASK, NULL, GDK_ACTION_COPY);
gtk_drag_source_add_image_targets (image);
g_signal_connect (image, "drag-begin",
G_CALLBACK (drag_begin), image);
g_signal_connect (image, "drag-data-get",
G_CALLBACK (drag_data_get), image);
content = gdk_content_provider_new_with_callback (GDK_TYPE_TEXTURE, get_texture, image);
source = gtk_drag_source_new (content, GDK_ACTION_COPY);
g_object_unref (content);
g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
/* accept drops on image */
gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,