diff options
Diffstat (limited to 'widgets/misc/e-menu-button.c')
| -rw-r--r-- | widgets/misc/e-menu-button.c | 497 |
1 files changed, 497 insertions, 0 deletions
diff --git a/widgets/misc/e-menu-button.c b/widgets/misc/e-menu-button.c new file mode 100644 index 0000000000..af60790bc5 --- /dev/null +++ b/widgets/misc/e-menu-button.c @@ -0,0 +1,497 @@ +/* + * e-menu-button.c + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) version 3. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with the program; if not, see <http://www.gnu.org/licenses/> + * + * + * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com) + * + */ + +#include "e-menu-button.h" + +#define E_MENU_BUTTON_GET_PRIVATE(obj) \ + (G_TYPE_INSTANCE_GET_PRIVATE \ + ((obj), E_TYPE_MENU_BUTTON, EMenuButtonPrivate)) + +struct _EMenuButtonPrivate { + GtkWidget *toggle_button; + GtkMenu *menu; /* not referenced */ +}; + +enum { + PROP_0, + PROP_MENU +}; + +enum { + SHOW_MENU, + LAST_SIGNAL +}; + +static gpointer parent_class; +static gulong signals[LAST_SIGNAL]; + +static void +menu_button_detach (GtkWidget *widget, + GtkMenu *menu) +{ + EMenuButtonPrivate *priv; + + priv = E_MENU_BUTTON_GET_PRIVATE (widget); + + g_return_if_fail (priv->menu == menu); + + priv->menu = NULL; +} + +static void +menu_button_deactivate_cb (EMenuButton *menu_button) +{ + GtkToggleButton *toggle_button; + + toggle_button = GTK_TOGGLE_BUTTON (menu_button->priv->toggle_button); + gtk_toggle_button_set_active (toggle_button, FALSE); +} + +static void +menu_button_menu_position (GtkMenu *menu, + gint *x, + gint *y, + gboolean *push_in, + EMenuButton *menu_button) +{ + GtkRequisition requisition; + GtkTextDirection direction; + GdkRectangle monitor; + GdkScreen *screen; + GdkWindow *window; + GtkWidget *widget; + GtkWidget *toggle_button; + gint button_bottom; + gint monitor_bottom; + gint monitor_num; + + widget = GTK_WIDGET (menu_button); + toggle_button = menu_button->priv->toggle_button; + gtk_widget_size_request (GTK_WIDGET (menu), &requisition); + + window = gtk_widget_get_parent_window (widget); + screen = gtk_widget_get_screen (GTK_WIDGET (menu)); + monitor_num = gdk_screen_get_monitor_at_window (screen, window); + if (monitor_num < 0) + monitor_num = 0; + gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor); + + gdk_window_get_origin (window, x, y); + *x += widget->allocation.x; + *y += widget->allocation.y; + + direction = gtk_widget_get_direction (widget); + if (direction == GTK_TEXT_DIR_LTR) + x += MAX (widget->allocation.width - requisition.width, 0); + else if (requisition.width > widget->allocation.width) + x -= requisition.width - widget->allocation.width; + + button_bottom = *y + toggle_button->allocation.height; + monitor_bottom = monitor.y + monitor.height; + + if (button_bottom + requisition.height <= monitor_bottom) + y += toggle_button->allocation.height; + else if (*y - requisition.height >= monitor.y) + y -= requisition.height; + else if (monitor_bottom - button_bottom > *y) + y += toggle_button->allocation.height; + else + y -= requisition.height; + + *push_in = FALSE; +} + +static void +menu_button_show_popup_menu (EMenuButton *menu_button, + GdkEventButton *event) +{ + g_signal_emit (menu_button, signals[SHOW_MENU], 0); + + if (menu_button->priv->menu == NULL) + return; + + if (event != NULL) + gtk_menu_popup ( + menu_button->priv->menu, NULL, NULL, + (GtkMenuPositionFunc) menu_button_menu_position, + menu_button, event->button, event->time); + else + gtk_menu_popup ( + menu_button->priv->menu, NULL, NULL, + (GtkMenuPositionFunc) menu_button_menu_position, + menu_button, 0, gtk_get_current_event_time ()); +} + +static gboolean +menu_button_toggle_button_press_event_cb (EMenuButton *menu_button, + GdkEventButton *event) +{ + if (event->button == 1) { + menu_button_show_popup_menu (menu_button, event); + return TRUE; + } + + return FALSE; +} + +static void +menu_button_toggle_toggled_cb (EMenuButton *menu_button) +{ + GtkMenuShell *menu_shell; + GtkToggleButton *toggle_button; + + menu_shell = GTK_MENU_SHELL (menu_button->priv->menu); + toggle_button = GTK_TOGGLE_BUTTON (menu_button->priv->toggle_button); + + if (!gtk_toggle_button_get_active (toggle_button)) + return; + + if (GTK_WIDGET_VISIBLE (menu_shell)) + return; + + /* We get here only when the menu is activated by a key + * press, so that we can select the first menu item. */ + menu_button_show_popup_menu (menu_button, NULL); + gtk_menu_shell_select_first (menu_shell, FALSE); +} + +static void +menu_button_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + switch (property_id) { + case PROP_MENU: + e_menu_button_set_menu ( + E_MENU_BUTTON (object), + g_value_get_object (value)); + return; + } + + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); +} + +static void +menu_button_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + switch (property_id) { + case PROP_MENU: + g_value_set_object ( + value, e_menu_button_get_menu ( + E_MENU_BUTTON (object))); + return; + } + + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); +} + +static void +menu_button_dispose (GObject *object) +{ + EMenuButtonPrivate *priv; + + priv = E_MENU_BUTTON_GET_PRIVATE (object); + + if (priv->toggle_button != NULL) { + g_object_unref (priv->toggle_button); + priv->toggle_button = NULL; + } + + if (priv->menu != NULL) { + g_signal_handlers_disconnect_by_func ( + priv->menu, menu_button_deactivate_cb, object); + gtk_menu_detach (priv->menu); + } + + /* Chain up to parent's dispose() method. */ + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +static void +menu_button_size_request (GtkWidget *widget, + GtkRequisition *requisition) +{ + EMenuButtonPrivate *priv; + GtkRequisition child_requisition; + GtkWidget *child; + + priv = E_MENU_BUTTON_GET_PRIVATE (widget); + + /* Chain up to parent's size_request() method. */ + GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition); + + child = priv->toggle_button; + gtk_widget_size_request (child, &child_requisition); + requisition->width += child_requisition.width; +} + +static void +menu_button_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + EMenuButtonPrivate *priv; + GtkAllocation child_allocation; + GtkRequisition child_requisition; + GtkWidget *child; + gint toggle_x; + + priv = E_MENU_BUTTON_GET_PRIVATE (widget); + + widget->allocation = *allocation; + + child = priv->toggle_button; + gtk_widget_size_request (child, &child_requisition); + + toggle_x = allocation->x + allocation->width - child_requisition.width; + + child_allocation.x = allocation->x; + child_allocation.y = allocation->y; + child_allocation.width = toggle_x - allocation->x; + child_allocation.height = allocation->height; + + /* Chain up to parent's size_allocate() method. */ + GTK_WIDGET_CLASS (parent_class)-> + size_allocate (widget, &child_allocation); + + child_allocation.x = toggle_x; + child_allocation.y = allocation->y; + child_allocation.width = child_requisition.width; + child_allocation.height = allocation->height; + + gtk_widget_size_allocate (child, &child_allocation); +} + +static void +menu_button_state_changed (GtkWidget *widget, + GtkStateType previous_state) +{ + EMenuButtonPrivate *priv; + + priv = E_MENU_BUTTON_GET_PRIVATE (widget); + + if (!GTK_WIDGET_IS_SENSITIVE (widget) && priv->menu != NULL) + gtk_menu_shell_deactivate (GTK_MENU_SHELL (priv->menu)); + + /* Chain up to parent's state_changed() method. */ + GTK_WIDGET_CLASS (parent_class)-> + state_changed (widget, previous_state); +} + +static void +menu_button_remove (GtkContainer *container, + GtkWidget *widget) +{ + EMenuButtonPrivate *priv; + + priv = E_MENU_BUTTON_GET_PRIVATE (container); + + /* Look in the internal widgets first. */ + + if (widget == priv->toggle_button) { + gtk_widget_unparent (priv->toggle_button); + gtk_widget_queue_resize (GTK_WIDGET (container)); + return; + } + + /* Chain up to parent's remove() method. */ + GTK_CONTAINER_CLASS (parent_class)->remove (container, widget); +} + +static void +menu_button_forall (GtkContainer *container, + gboolean include_internals, + GtkCallback callback, + gpointer callback_data) +{ + EMenuButtonPrivate *priv; + + priv = E_MENU_BUTTON_GET_PRIVATE (container); + + if (include_internals) + callback (priv->toggle_button, callback_data); + + /* Chain up to parent's forall() method. */ + GTK_CONTAINER_CLASS (parent_class)->forall ( + container, include_internals, callback, callback_data); +} + +static void +menu_button_class_init (EMenuButtonClass *class) +{ + GObjectClass *object_class; + GtkWidgetClass *widget_class; + GtkContainerClass *container_class; + + parent_class = g_type_class_peek_parent (class); + g_type_class_add_private (class, sizeof (EMenuButtonPrivate)); + + object_class = G_OBJECT_CLASS (class); + object_class->set_property = menu_button_set_property; + object_class->get_property = menu_button_get_property; + object_class->dispose = menu_button_dispose; + + widget_class = GTK_WIDGET_CLASS (class); + widget_class->size_request = menu_button_size_request; + widget_class->size_allocate = menu_button_size_allocate; + widget_class->state_changed = menu_button_state_changed; + + container_class = GTK_CONTAINER_CLASS (class); + container_class->remove = menu_button_remove; + container_class->forall = menu_button_forall; + + g_object_class_install_property ( + object_class, + PROP_MENU, + g_param_spec_object ( + "menu", + "Menu", + NULL, + GTK_TYPE_MENU, + G_PARAM_READWRITE)); + + signals[SHOW_MENU] = g_signal_new ( + "show-menu", + G_OBJECT_CLASS_TYPE (object_class), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (EMenuButtonClass, show_menu), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); +} + +static void +menu_button_init (EMenuButton *menu_button) +{ + GtkWidget *container; + GtkWidget *widget; + + menu_button->priv = E_MENU_BUTTON_GET_PRIVATE (menu_button); + + container = GTK_WIDGET (menu_button); + + widget = gtk_toggle_button_new (); + gtk_widget_set_sensitive (widget, FALSE); + gtk_widget_set_parent (widget, container); + menu_button->priv->toggle_button = g_object_ref (widget); + gtk_widget_show (widget); + + container = widget; + + widget = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE); + gtk_container_add (GTK_CONTAINER (container), widget); + gtk_widget_show (widget); + + g_signal_connect_swapped ( + menu_button->priv->toggle_button, "button-press-event", + G_CALLBACK (menu_button_toggle_button_press_event_cb), + menu_button); + + g_signal_connect_swapped ( + menu_button->priv->toggle_button, "toggled", + G_CALLBACK (menu_button_toggle_toggled_cb), menu_button); +} + +GType +e_menu_button_get_type (void) +{ + static GType type = 0; + + if (G_UNLIKELY (type == 0)) { + static const GTypeInfo type_info = { + sizeof (EMenuButtonClass), + (GBaseInitFunc) NULL, + (GBaseFinalizeFunc) NULL, + (GClassInitFunc) menu_button_class_init, + (GClassFinalizeFunc) NULL, + NULL, /* class_init */ + sizeof (EMenuButton), + 0, /* n_preallocs */ + (GInstanceInitFunc) menu_button_init, + NULL /* value_table */ + }; + + type = g_type_register_static ( + GTK_TYPE_BUTTON, "EMenuButton", &type_info, 0); + } + + return type; +} + +GtkWidget * +e_menu_button_new (void) +{ + return g_object_new (E_TYPE_MENU_BUTTON, NULL); +} + +GtkWidget * +e_menu_button_get_menu (EMenuButton *menu_button) +{ + g_return_val_if_fail (E_IS_MENU_BUTTON (menu_button), NULL); + + return GTK_WIDGET (menu_button->priv->menu); +} + +void +e_menu_button_set_menu (EMenuButton *menu_button, + GtkWidget *menu) +{ + g_return_if_fail (E_IS_MENU_BUTTON (menu_button)); + g_return_if_fail (GTK_IS_MENU (menu) || menu == NULL); + + if (menu_button->priv->menu == GTK_MENU (menu)) + goto exit; + + if (menu_button->priv->menu != NULL) { + GtkMenuShell *menu_shell; + + menu_shell = GTK_MENU_SHELL (menu_button->priv->menu); + + if (GTK_WIDGET_VISIBLE (menu_shell)) + gtk_menu_shell_deactivate (menu_shell); + + g_signal_handlers_disconnect_by_func ( + menu_shell, menu_button_deactivate_cb, menu_button); + + gtk_menu_detach (menu_button->priv->menu); + } + + menu_button->priv->menu = GTK_MENU (menu); + + if (menu != NULL) { + gtk_menu_attach_to_widget ( + GTK_MENU (menu), GTK_WIDGET (menu_button), + (GtkMenuDetachFunc) menu_button_detach); + + g_signal_connect_swapped ( + menu, "deactivate", + G_CALLBACK (menu_button_deactivate_cb), menu_button); + } + + gtk_widget_set_sensitive ( + menu_button->priv->toggle_button, menu != NULL); + +exit: + g_object_notify (G_OBJECT (menu_button), "menu"); +} |