+static struct output_view_item *
+find_selected_item (struct psppire_output_view *view)
+{
+ struct output_view_item *item = NULL;
+ if (view == NULL)
+ return NULL;
+ if (view->items == NULL)
+ return NULL;
+
+ for (item = view->items; item < &view->items[view->n_items]; item++)
+ {
+ GtkWidget *widget = GTK_WIDGET (item->drawing_area);
+ if (GTK_IS_WIDGET (widget))
+ {
+ GtkStateFlags state = gtk_widget_get_state_flags (widget);
+ if (state & GTK_STATE_FLAG_SELECTED)
+ return item;
+ }
+ }
+ return NULL;
+}
+
+
+static void
+set_copy_action (struct psppire_output_view *view,
+ gboolean state)
+{
+ GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view->output));
+ GAction *copy_action = g_action_map_lookup_action (G_ACTION_MAP (toplevel),
+ "copy");
+ g_object_set (copy_action,
+ "enabled", state,
+ NULL);
+}
+
+static void
+clear_selection (struct psppire_output_view *view)
+{
+ if (view == NULL)
+ return;
+ struct output_view_item *item = find_selected_item (view);
+ if (item == NULL)
+ return;
+ set_copy_action (view, FALSE);
+ GtkWidget *widget = GTK_WIDGET (item->drawing_area);
+ if (GTK_IS_WIDGET (widget))
+ {
+ gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_SELECTED);
+ gtk_widget_queue_draw (widget);
+ }
+}
+
+static gboolean
+off_item_button_press_event_cb (GtkWidget *widget,
+ GdkEventButton *event,
+ struct psppire_output_view *view)
+{
+ /* buttontime is set by button_press_event_cb
+ If our event->time is equal to the time from the
+ button_press_event_cb, then we handle the same event.
+ In that case we must not clear the selection because
+ it was just set by button_press_event_cb from the item */
+ if (event->time != view->buttontime)
+ clear_selection (view);
+ return FALSE; /* Forward the event -> DragNDrop */
+}
+
+static gboolean
+button_press_event_cb (GtkWidget *widget,
+ GdkEventButton *event,
+ struct psppire_output_view *view)
+{
+ view->buttontime = event->time;
+ clear_selection (view);
+ set_copy_action (view, TRUE);
+ gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_SELECTED, FALSE);
+ gtk_widget_queue_draw (widget);
+ return FALSE; /* Forward Event -> off_item will trigger */
+}
+
+static void
+drag_data_get_cb (GtkWidget *widget, GdkDragContext *context,
+ GtkSelectionData *selection_data,
+ guint target_type, guint time,
+ struct psppire_output_view *view)
+{
+ view->selected_item = find_selected_item (view);
+ clipboard_get_cb (NULL, selection_data, target_type, view);
+}
+