/* Drag-and-Drop * * I can't believe its not glade! * * Try right-clicking in the window. */ #include #include #include typedef struct _GtkDemoWidget GtkDemoWidget; struct _GtkDemoWidget { GType type; union { char *text; gboolean active; }; }; static gpointer copy_demo_widget (gpointer data) { GtkDemoWidget *demo = g_memdup (data, sizeof (GtkDemoWidget)); if (demo->type == GTK_TYPE_LABEL) demo->text = g_strdup (demo->text); return demo; } static void free_demo_widget (gpointer data) { GtkDemoWidget *demo = data; if (demo->type == GTK_TYPE_LABEL) g_free (demo->text); g_free (demo); } #define GTK_TYPE_DEMO_WIDGET (gtk_demo_widget_get_type ()) G_DEFINE_BOXED_TYPE (GtkDemoWidget, gtk_demo_widget, copy_demo_widget, free_demo_widget) static GtkDemoWidget * serialize_widget (GtkWidget *widget) { GtkDemoWidget *demo; demo = g_new0 (GtkDemoWidget, 1); demo->type = G_OBJECT_TYPE (widget); if (GTK_IS_LABEL (widget)) { demo->text = g_strdup (gtk_label_get_text (GTK_LABEL (widget))); } else if (GTK_IS_SPINNER (widget)) { g_object_get (widget, "spinning", &demo->active, NULL); } else { g_print ("Type %s not supported\n", g_type_name (demo->type)); } return demo; } static GtkWidget * deserialize_widget (GtkDemoWidget *demo) { GtkWidget *widget = NULL; if (demo->type == GTK_TYPE_LABEL) { widget = gtk_label_new (demo->text); } else if (demo->type == GTK_TYPE_SPINNER) { widget = g_object_new (demo->type, "spinning", demo->active, NULL); gtk_style_context_add_class (gtk_widget_get_style_context (widget), "demo"); } else { g_print ("Type %s not supported\n", g_type_name (demo->type)); } return widget; } static double pos_x, pos_y; static void new_label_cb (GtkWidget *button, gpointer data) { GtkFixed *fixed = data; GtkWidget *widget; widget = gtk_label_new ("Label"); gtk_fixed_put (fixed, widget, pos_x, pos_y); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void new_spinner_cb (GtkWidget *button, gpointer data) { GtkFixed *fixed = data; GtkWidget *widget; widget = gtk_spinner_new (); gtk_style_context_add_class (gtk_widget_get_style_context (widget), "demo"); gtk_spinner_start (GTK_SPINNER (widget)); gtk_fixed_put (fixed, widget, pos_x, pos_y); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void copy_cb (GtkWidget *button, GtkWidget *child) { GdkClipboard *clipboard; GtkDemoWidget *demo; demo = serialize_widget (child); clipboard = gdk_display_get_clipboard (gdk_display_get_default ()); gdk_clipboard_set (clipboard, GTK_TYPE_DEMO_WIDGET, demo); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void delete_cb (GtkWidget *button, GtkWidget *child) { gtk_widget_destroy (child); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void cut_cb (GtkWidget *button, GtkWidget *child) { copy_cb (button, child); delete_cb (button, child); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void value_read (GObject *source, GAsyncResult *res, gpointer data) { GdkClipboard *clipboard = GDK_CLIPBOARD (source); GError *error = NULL; const GValue *value; GtkDemoWidget *demo; GtkWidget *widget = NULL; value = gdk_clipboard_read_value_finish (clipboard, res, &error); if (value == NULL) { g_print ("error: %s\n", error->message); g_error_free (error); return; } if (!G_VALUE_HOLDS (value, GTK_TYPE_DEMO_WIDGET)) { g_print ("can't handle clipboard contents\n"); return; } demo = g_value_get_boxed (value); widget = deserialize_widget (demo); gtk_fixed_put (GTK_FIXED (data), widget, pos_x, pos_y); } static void paste_cb (GtkWidget *button, GtkWidget *fixed) { GdkClipboard *clipboard; clipboard = gdk_display_get_clipboard (gdk_display_get_default ()); if (gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GTK_TYPE_DEMO_WIDGET)) { g_print ("Paste %s\n", g_type_name (GTK_TYPE_DEMO_WIDGET)); gdk_clipboard_read_value_async (clipboard, GTK_TYPE_DEMO_WIDGET, 0, NULL, value_read, fixed); } else g_print ("Don't know how to handle clipboard contents\n"); gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void edit_label_done (GtkWidget *entry, gpointer data) { GtkWidget *fixed = gtk_widget_get_parent (entry); GtkWidget *label; int x, y; gtk_fixed_get_child_position (GTK_FIXED (fixed), entry, &x, &y); label = GTK_WIDGET (g_object_get_data (G_OBJECT (entry), "label")); gtk_label_set_text (GTK_LABEL (label), gtk_editable_get_text (GTK_EDITABLE (entry))); gtk_widget_destroy (entry); } static void edit_cb (GtkWidget *button, GtkWidget *child) { GtkWidget *fixed = gtk_widget_get_parent (child); int x, y; gtk_fixed_get_child_position (GTK_FIXED (fixed), child, &x, &y); if (GTK_IS_LABEL (child)) { GtkWidget *entry = gtk_entry_new (); g_object_set_data (G_OBJECT (entry), "label", child); gtk_editable_set_text (GTK_EDITABLE (entry), gtk_label_get_text (GTK_LABEL (child))); gtk_editable_set_width_chars (GTK_EDITABLE (entry), 12); g_signal_connect (entry, "activate", G_CALLBACK (edit_label_done), NULL); gtk_fixed_put (GTK_FIXED (fixed), entry, x, y); gtk_widget_grab_focus (entry); } else if (GTK_IS_SPINNER (child)) { gboolean active; g_object_get (child, "spinning", &active, NULL); g_object_set (child, "spinning", !active, NULL); } if (button) gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER))); } static void pressed_cb (GtkGesture *gesture, int n_press, double x, double y, gpointer data) { GtkWidget *widget; GtkWidget *child; widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)); child = gtk_widget_pick (widget, x, y, GTK_PICK_DEFAULT); if (gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture)) == GDK_BUTTON_SECONDARY) { GtkWidget *menu; GtkWidget *box; GtkWidget *item; GdkClipboard *clipboard; pos_x = x; pos_y = y; menu = gtk_popover_new (); gtk_widget_set_parent (menu, widget); gtk_popover_set_has_arrow (GTK_POPOVER (menu), FALSE); gtk_popover_set_pointing_to (GTK_POPOVER (menu), &(GdkRectangle){ x, y, 1, 1}); box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_container_add (GTK_CONTAINER (menu), box); item = gtk_button_new_with_label ("New Label"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); g_signal_connect (item, "clicked", G_CALLBACK (new_label_cb), widget); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("New Spinner"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); g_signal_connect (item, "clicked", G_CALLBACK (new_spinner_cb), widget); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("Edit"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); gtk_widget_set_sensitive (item, child != NULL && child != widget); g_signal_connect (item, "clicked", G_CALLBACK (edit_cb), child); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("Cut"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); gtk_widget_set_sensitive (item, child != NULL && child != widget); g_signal_connect (item, "clicked", G_CALLBACK (cut_cb), child); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("Copy"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); gtk_widget_set_sensitive (item, child != NULL && child != widget); g_signal_connect (item, "clicked", G_CALLBACK (copy_cb), child); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("Paste"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); clipboard = gdk_display_get_clipboard (gdk_display_get_default ()); gtk_widget_set_sensitive (item, gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GTK_TYPE_DEMO_WIDGET)); g_signal_connect (item, "clicked", G_CALLBACK (paste_cb), widget); gtk_container_add (GTK_CONTAINER (box), item); item = gtk_button_new_with_label ("Delete"); gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE); gtk_widget_set_sensitive (item, child != NULL && child != widget); g_signal_connect (item, "clicked", G_CALLBACK (delete_cb), child); gtk_container_add (GTK_CONTAINER (box), item); gtk_popover_popup (GTK_POPOVER (menu)); } } static void released_cb (GtkGesture *gesture, int n_press, double x, double y, gpointer data) { GtkWidget *widget; GtkWidget *child; widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)); child = gtk_widget_pick (widget, x, y, 0); if (gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture)) == GDK_BUTTON_PRIMARY) { if (child != NULL && child != widget) edit_cb (NULL, child); } } static GtkWidget *window = NULL; GtkWidget * do_dnd (GtkWidget *do_widget) { if (!window) { GtkWidget *vbox, *fixed; GtkGesture *multipress; GtkCssProvider *provider; window = gtk_window_new (); gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget)); gtk_window_set_title (GTK_WINDOW (window), "Drag-and-drop"); g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window); vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_container_add (GTK_CONTAINER (window), vbox); fixed = gtk_fixed_new (); gtk_container_add (GTK_CONTAINER (vbox), fixed); gtk_widget_set_hexpand (fixed, TRUE); gtk_widget_set_vexpand (fixed, TRUE); multipress = gtk_gesture_click_new (); gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (multipress), 0); g_signal_connect (multipress, "pressed", G_CALLBACK (pressed_cb), NULL); g_signal_connect (multipress, "released", G_CALLBACK (released_cb), NULL); gtk_widget_add_controller (fixed, GTK_EVENT_CONTROLLER (multipress)); provider = gtk_css_provider_new (); gtk_css_provider_load_from_resource (provider, "/dnd/dnd.css"); gtk_style_context_add_provider_for_display (gdk_display_get_default (), GTK_STYLE_PROVIDER (provider), 800); } if (!gtk_widget_get_visible (window)) gtk_widget_show (window); else gtk_widget_destroy (window); return window; }