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94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CEF_LIBCEF_BROWSER_NATIVE_MENU_2_H_
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#define CEF_LIBCEF_BROWSER_NATIVE_MENU_2_H_
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#include <memory>
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#include "libcef/browser/native/menu_wrapper.h"
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#include "base/macros.h"
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#include "ui/gfx/native_widget_types.h"
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namespace gfx {
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class Point;
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}
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namespace ui {
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class MenuModel;
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}
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namespace views {
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// A menu. Populated from a model, and relies on a delegate to execute commands.
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//
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// WARNING: do NOT create and use Menu2 on the stack. Menu2 notifies the model
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// of selection AFTER a delay. This means that if use a Menu2 on the stack
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// ActivatedAt is never invoked.
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class Menu2 {
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public:
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// How the menu is aligned relative to the point it is shown at.
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// The alignment is reversed by menu if text direction is right to left.
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enum Alignment { ALIGN_TOPLEFT, ALIGN_TOPRIGHT };
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// Creates a new menu populated with the contents of |model|.
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// WARNING: this populates the menu on construction by invoking methods on
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// the model. As such, it is typically not safe to use this as the model
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// from the constructor. EG:
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// MyClass : menu_(this) {}
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// is likely to have problems.
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explicit Menu2(ui::MenuModel* model);
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virtual ~Menu2();
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// Runs the menu at the specified point. This method blocks until done.
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// RunContextMenuAt is the same, but the alignment is the default for a
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// context menu.
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void RunMenuAt(const gfx::Point& point, Alignment alignment);
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void RunContextMenuAt(const gfx::Point& point);
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// Cancels the active menu.
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void CancelMenu();
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// Called when the model supplying data to this menu has changed, and the menu
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// must be rebuilt.
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void Rebuild();
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// Called when the states of the menu items in the menu should be refreshed
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// from the model.
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void UpdateStates();
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// For submenus.
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HMENU GetNativeMenu() const;
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// Get the result of the last call to RunMenuAt to determine whether an
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// item was selected, the user navigated to a next or previous menu, or
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// nothing.
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MenuWrapper::MenuAction GetMenuAction() const;
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// Add a listener to receive a callback when the menu opens.
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void AddMenuListener(MenuListener* listener);
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// Remove a menu listener.
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void RemoveMenuListener(MenuListener* listener);
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// Accessors.
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ui::MenuModel* model() const { return model_; }
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// Sets the minimum width of the menu.
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void SetMinimumWidth(int width);
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private:
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ui::MenuModel* model_;
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// The object that actually implements the menu.
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std::unique_ptr<MenuWrapper> wrapper_;
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DISALLOW_COPY_AND_ASSIGN(Menu2);
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};
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} // namespace views
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#endif // CEF_LIBCEF_BROWSER_NATIVE_MENU_2_H_
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