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gtk-demo: Convert clipboard demo to GtkDropTarget

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This commit is contained in:
Matthias Clasen 2020-01-01 13:13:39 -05:00
parent a76b187a5b
commit ac09500d74
1 changed files with 51 additions and 25 deletions
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76
demos/gtk-demo/clipboard.c
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@ -143,19 +143,45 @@ get_texture (GValue *value,
}
static void
drag_data_received (GtkWidget *widget,
GdkDrop *drop,
GtkSelectionData *selection_data,
gpointer data)
got_texture (GObject *source,
GAsyncResult *result,
gpointer data)
{
if (gtk_selection_data_get_length (selection_data) > 0)
{
GdkTexture *texture;
GdkDrop *drop = GDK_DROP (source);
GtkWidget *image = data;
const GValue *value;
GError *error = NULL;
texture = gtk_selection_data_get_texture (selection_data);
gtk_image_set_from_paintable (GTK_IMAGE (data), GDK_PAINTABLE (texture));
g_object_unref (texture);
value = gdk_drop_read_value_finish (drop, result, &error);
if (value)
{
GdkTexture *texture = g_value_get_object (value);
gtk_image_set_from_paintable (GTK_IMAGE (image), GDK_PAINTABLE (texture));
}
else
{
g_print ("Failed to get data: %s\n", error->message);
g_error_free (error);
}
}
static gboolean
drag_drop (GtkDropTarget *dest,
int x,
int y,
GtkWidget *widget)
{
GdkDrop *drop;
drop = gtk_drop_target_get_drop (dest);
if (gdk_drop_has_value (drop, GDK_TYPE_TEXTURE))
{
gdk_drop_read_value_async (drop, GDK_TYPE_TEXTURE, G_PRIORITY_DEFAULT, NULL, got_texture, widget);
return TRUE;
}
return FALSE;
}
static void
@ -166,12 +192,8 @@ copy_image (GSimpleAction *action,
GdkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (data));
GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (data));
g_print ("copy image\n");
if (GDK_IS_TEXTURE (paintable))
{
g_print ("set clipboard\n");
gdk_clipboard_set_texture (clipboard, GDK_TEXTURE (paintable));
}
gdk_clipboard_set_texture (clipboard, GDK_TEXTURE (paintable));
if (paintable)
g_object_unref (paintable);
@ -244,6 +266,8 @@ do_clipboard (GtkWidget *do_widget)
GActionGroup *actions;
GdkContentProvider *content = NULL;
GtkDragSource *source;
GtkDropTarget *dest;
GdkContentFormats *formats;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_display (GTK_WINDOW (window),
@ -313,11 +337,12 @@ do_clipboard (GtkWidget *do_widget)
g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
/* accept drops on image */
gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,
NULL, GDK_ACTION_COPY);
gtk_drag_dest_add_image_targets (image);
g_signal_connect (image, "drag-data-received",
G_CALLBACK (drag_data_received), image);
formats = gdk_content_formats_new (NULL, 0);
formats = gtk_content_formats_add_image_targets (formats, FALSE);
dest = gtk_drop_target_new (GTK_DEST_DEFAULT_MOTION|GTK_DEST_DEFAULT_HIGHLIGHT, formats, GDK_ACTION_COPY);
gdk_content_formats_unref (formats);
g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), image);
gtk_drop_target_attach (dest, image);
/* context menu on image */
gesture = gtk_gesture_click_new ();
@ -345,11 +370,12 @@ do_clipboard (GtkWidget *do_widget)
gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
/* accept drops on image */
gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,
NULL, GDK_ACTION_COPY);
gtk_drag_dest_add_image_targets (image);
g_signal_connect (image, "drag-data-received",
G_CALLBACK (drag_data_received), image);
formats = gdk_content_formats_new (NULL, 0);
formats = gtk_content_formats_add_image_targets (formats, FALSE);
dest = gtk_drop_target_new (GTK_DEST_DEFAULT_MOTION|GTK_DEST_DEFAULT_HIGHLIGHT, formats, GDK_ACTION_COPY);
gdk_content_formats_unref (formats);
g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), image);
gtk_drop_target_attach (dest, image);
/* context menu on image */
gesture = gtk_gesture_click_new ();