316 lines
9.3 KiB
C
316 lines
9.3 KiB
C
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#include "demoimage.h"
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#include <glib/gi18n.h>
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struct _DemoImage {
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GtkWidget parent_instance;
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GtkWidget *image;
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GtkWidget *popover;
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};
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enum {
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PROP_ICON_NAME = 1
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};
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G_DEFINE_TYPE(DemoImage, demo_image, GTK_TYPE_WIDGET)
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static GdkPaintable *
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get_image_paintable (GtkImage *image)
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{
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const char *icon_name;
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GtkIconTheme *icon_theme;
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GtkIconPaintable *icon;
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switch (gtk_image_get_storage_type (image))
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{
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case GTK_IMAGE_PAINTABLE:
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return g_object_ref (gtk_image_get_paintable (image));
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case GTK_IMAGE_ICON_NAME:
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icon_name = gtk_image_get_icon_name (image);
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icon_theme = gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (image)));
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icon = gtk_icon_theme_lookup_icon (icon_theme,
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icon_name,
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NULL,
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48, 1,
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gtk_widget_get_direction (GTK_WIDGET (image)),
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0);
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if (icon == NULL)
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return NULL;
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return GDK_PAINTABLE (icon);
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case GTK_IMAGE_EMPTY:
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case GTK_IMAGE_GICON:
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default:
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g_warning ("Image storage type %d not handled",
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gtk_image_get_storage_type (image));
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return NULL;
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}
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}
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static void
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update_drag_icon (DemoImage *demo,
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GtkDragIcon *icon)
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{
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const char *icon_name;
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GdkPaintable *paintable;
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GtkWidget *image;
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switch (gtk_image_get_storage_type (GTK_IMAGE (demo->image)))
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{
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case GTK_IMAGE_PAINTABLE:
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paintable = gtk_image_get_paintable (GTK_IMAGE (demo->image));
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image = gtk_image_new_from_paintable (paintable);
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break;
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case GTK_IMAGE_ICON_NAME:
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icon_name = gtk_image_get_icon_name (GTK_IMAGE (demo->image));
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image = gtk_image_new_from_icon_name (icon_name);
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break;
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case GTK_IMAGE_EMPTY:
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case GTK_IMAGE_GICON:
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default:
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g_warning ("Image storage type %d not handled",
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gtk_image_get_storage_type (GTK_IMAGE (demo->image)));
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return;
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}
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gtk_image_set_pixel_size (GTK_IMAGE (image),
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gtk_image_get_pixel_size (GTK_IMAGE (demo->image)));
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gtk_drag_icon_set_child (icon, image);
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}
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static void
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drag_begin (GtkDragSource *source,
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GdkDrag *drag,
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gpointer data)
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{
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GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
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DemoImage *demo = DEMO_IMAGE (widget);
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update_drag_icon (demo, GTK_DRAG_ICON (gtk_drag_icon_get_for_drag (drag)));
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}
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static GdkContentProvider *
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prepare_drag (GtkDragSource *source,
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double x,
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double y,
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gpointer data)
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{
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GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
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DemoImage *demo = DEMO_IMAGE (widget);
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GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
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/* Textures can be serialized, paintables can't, so special case the textures */
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if (GDK_IS_TEXTURE (paintable))
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return gdk_content_provider_new_typed (GDK_TYPE_TEXTURE, paintable);
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else
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return gdk_content_provider_new_typed (GDK_TYPE_PAINTABLE, paintable);
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}
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static gboolean
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drag_drop (GtkDropTarget *dest,
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const GValue *value,
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double x,
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double y,
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gpointer data)
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{
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GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
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DemoImage *demo = DEMO_IMAGE (widget);
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GdkPaintable *paintable = g_value_get_object (value);
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gtk_image_set_from_paintable (GTK_IMAGE (demo->image), paintable);
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return TRUE;
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}
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static void
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copy_image (GtkWidget *widget,
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const char *action_name,
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GVariant *parameter)
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{
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GdkClipboard *clipboard = gtk_widget_get_clipboard (widget);
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DemoImage *demo = DEMO_IMAGE (widget);
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GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
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GValue value = G_VALUE_INIT;
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/* Textures can be serialized, paintables can't, so special case the textures */
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if (GDK_IS_TEXTURE (paintable))
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g_value_init (&value, GDK_TYPE_TEXTURE);
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else
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g_value_init (&value, GDK_TYPE_PAINTABLE);
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g_value_set_object (&value, paintable);
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gdk_clipboard_set_value (clipboard, &value);
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g_value_unset (&value);
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if (paintable)
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g_object_unref (paintable);
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}
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static void
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paste_image_cb (GObject *source,
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GAsyncResult *result,
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gpointer data)
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{
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GdkClipboard *clipboard = GDK_CLIPBOARD (source);
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DemoImage *demo = DEMO_IMAGE (data);
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const GValue *value;
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value = gdk_clipboard_read_value_finish (clipboard, result, NULL);
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if (value == NULL)
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{
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gtk_widget_error_bell (GTK_WIDGET (demo));
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g_object_unref (demo);
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return;
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}
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gtk_image_set_from_paintable (GTK_IMAGE (demo->image), g_value_get_object (value));
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g_object_unref (demo);
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}
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static void
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paste_image (GtkWidget *widget,
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const char *action_name,
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GVariant *parameter)
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{
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GdkClipboard *clipboard = gtk_widget_get_clipboard (widget);
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GType type;
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if (gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GDK_TYPE_TEXTURE))
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type = GDK_TYPE_TEXTURE;
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else
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type = GDK_TYPE_PAINTABLE;
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gdk_clipboard_read_value_async (clipboard,
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type,
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G_PRIORITY_DEFAULT,
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NULL,
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paste_image_cb,
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g_object_ref (widget));
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}
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static void
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pressed_cb (GtkGesture *gesture,
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int n_press,
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double x,
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double y,
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gpointer data)
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{
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DemoImage *demo = DEMO_IMAGE (gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)));
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gtk_popover_popup (GTK_POPOVER (demo->popover));
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}
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static void
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demo_image_init (DemoImage *demo)
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{
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GMenu *menu;
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GMenuItem *item;
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GtkDragSource *source;
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GtkDropTarget *dest;
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GtkGesture *gesture;
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demo->image = gtk_image_new ();
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gtk_image_set_pixel_size (GTK_IMAGE (demo->image), 48);
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gtk_widget_set_parent (demo->image, GTK_WIDGET (demo));
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menu = g_menu_new ();
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item = g_menu_item_new (_("_Copy"), "clipboard.copy");
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g_menu_append_item (menu, item);
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item = g_menu_item_new (_("_Paste"), "clipboard.paste");
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g_menu_append_item (menu, item);
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demo->popover = gtk_popover_menu_new_from_model (G_MENU_MODEL (menu));
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gtk_widget_set_parent (demo->popover, GTK_WIDGET (demo));
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source = gtk_drag_source_new ();
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g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
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g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
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gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (source));
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dest = gtk_drop_target_new (GDK_TYPE_PAINTABLE, GDK_ACTION_COPY);
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g_signal_connect (dest, "drop", G_CALLBACK (drag_drop), NULL);
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gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (dest));
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gesture = gtk_gesture_click_new ();
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gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
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g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), NULL);
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gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (gesture));
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}
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static void
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demo_image_dispose (GObject *object)
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{
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DemoImage *demo = DEMO_IMAGE (object);
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g_clear_pointer (&demo->image, gtk_widget_unparent);
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g_clear_pointer (&demo->popover, gtk_widget_unparent);
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G_OBJECT_CLASS (demo_image_parent_class)->dispose (object);
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}
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static void
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demo_image_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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DemoImage *demo = DEMO_IMAGE (object);
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switch (prop_id)
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{
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case PROP_ICON_NAME:
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g_value_set_string (value, gtk_image_get_icon_name (GTK_IMAGE (demo->image)));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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demo_image_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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DemoImage *demo = DEMO_IMAGE (object);
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switch (prop_id)
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{
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case PROP_ICON_NAME:
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gtk_image_set_from_icon_name (GTK_IMAGE (demo->image),
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g_value_get_string (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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demo_image_class_init (DemoImageClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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object_class->dispose = demo_image_dispose;
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object_class->get_property = demo_image_get_property;
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object_class->set_property = demo_image_set_property;
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g_object_class_install_property (object_class, PROP_ICON_NAME,
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g_param_spec_string ("icon-name", "Icon name", "Icon name",
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NULL, G_PARAM_READWRITE));
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gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
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gtk_widget_class_install_action (widget_class, "clipboard.copy", NULL, copy_image);
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gtk_widget_class_install_action (widget_class, "clipboard.paste", NULL, paste_image);
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}
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GtkWidget *
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demo_image_new (const char *icon_name)
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{
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return g_object_new (DEMO_TYPE_IMAGE, "icon-name", icon_name, NULL);
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}
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