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gtk-demo: Make clipboard demo paste from clipboard

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The old code was just pasting local clipboard data that we put there
ourselves and was causing criticals on remote clipboard data. Now the
code does the proper async paste.
This commit is contained in:
Benjamin Otte 2021-08-19 03:14:59 +02:00
parent 6f165efcdb
commit 6b733d2943
1 changed files with 32 additions and 10 deletions
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42
demos/gtk-demo/demoimage.c
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@ -146,24 +146,46 @@ copy_image (GtkWidget *widget,
g_object_unref (paintable);
}
static void
paste_image_cb (GObject *source,
GAsyncResult *result,
gpointer data)
{
GdkClipboard *clipboard = GDK_CLIPBOARD (source);
DemoImage *demo = DEMO_IMAGE (data);
const GValue *value;
value = gdk_clipboard_read_value_finish (clipboard, result, NULL);
if (value == NULL)
{
gtk_widget_error_bell (GTK_WIDGET (demo));
g_object_unref (demo);
return;
}
gtk_image_set_from_paintable (GTK_IMAGE (demo->image), g_value_get_object (value));
g_object_unref (demo);
}
static void
paste_image (GtkWidget *widget,
const char *action_name,
GVariant *parameter)
{
GdkClipboard *clipboard = gtk_widget_get_clipboard (widget);
DemoImage *demo = DEMO_IMAGE (widget);
GdkContentProvider *content = gdk_clipboard_get_content (clipboard);
GValue value = G_VALUE_INIT;
GdkPaintable *paintable;
GType type;
g_value_init (&value, GDK_TYPE_PAINTABLE);
if (!gdk_content_provider_get_value (content, &value, NULL))
return;
if (gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GDK_TYPE_TEXTURE))
type = GDK_TYPE_TEXTURE;
else
type = GDK_TYPE_PAINTABLE;
paintable = GDK_PAINTABLE (g_value_get_object (&value));
gtk_image_set_from_paintable (GTK_IMAGE (demo->image), paintable);
g_value_unset (&value);
gdk_clipboard_read_value_async (clipboard,
type,
G_PRIORITY_DEFAULT,
NULL,
paste_image_cb,
g_object_ref (widget));
}
static void