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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_LAUNCHER_LAUNCHER_DELEGATE_H_
#define ASH_LAUNCHER_LAUNCHER_DELEGATE_H_
#include "ash/ash_export.h"
#include "ash/launcher/launcher_types.h"
#include "base/string16.h"
#include "ui/base/models/simple_menu_model.h"
namespace aura {
class RootWindow;
}
namespace ui {
class Event;
}
namespace ash {
class Launcher;
// A special menu model which keeps track of an "active" menu item.
class ASH_EXPORT LauncherMenuModel : public ui::SimpleMenuModel {
public:
explicit LauncherMenuModel(ui::SimpleMenuModel::Delegate* delegate)
: ui::SimpleMenuModel(delegate) {}
// Returns |true| when the given |command_id| is active and needs to be drawn
// in a special state.
virtual bool IsCommandActive(int command_id) const = 0;
private:
DISALLOW_COPY_AND_ASSIGN(LauncherMenuModel);
};
// Delegate for the Launcher.
class ASH_EXPORT LauncherDelegate {
public:
// Launcher owns the delegate.
virtual ~LauncherDelegate() {}
// Invoked when the user clicks on button in the launcher to open last used
// window (or create a new one if there is no last used window).
// |event_flags| is the flags of the click event.
virtual void OnBrowserShortcutClicked(int event_flags) = 0;
// Invoked when the user clicks on a window entry in the launcher.
// |event| is the click event. The |event| is dispatched by a view
// and has an instance of |views::View| as the event target
// but not |aura::Window|.
virtual void ItemClicked(const LauncherItem& item,
const ui::Event& event) = 0;
// Returns the resource id of the image to show on the browser shortcut
// button.
virtual int GetBrowserShortcutResourceId() = 0;
// Returns the title to display for the specified launcher item.
virtual string16 GetTitle(const LauncherItem& item) = 0;
// Returns the context menumodel for the specified item on
// |root_window|. Return NULL if there should be no context
// menu. The caller takes ownership of the returned model.
virtual ui::MenuModel* CreateContextMenu(const LauncherItem& item,
aura::RootWindow* root_window) = 0;
// Returns the application menu model for the specified item. There are three
// possible return values:
// - A return of NULL indicates that no menu is wanted for this item.
// - A return of a menu with one item means that only the name of the
// application/item was added and there are no active applications.
// Note: This is useful for hover menus which also show context help.
// - A list containing the title and the active list of items.
// The caller takes ownership of the returned model.
// |event_flags| specifies the flags of the event which triggered this menu.
virtual LauncherMenuModel* CreateApplicationMenu(
const LauncherItem& item,
int event_flags) = 0;
// Returns the id of the item associated with the specified window, or 0 if
// there isn't one.
virtual LauncherID GetIDByWindow(aura::Window* window) = 0;
// Whether the given launcher item is draggable.
virtual bool IsDraggable(const LauncherItem& item) = 0;
// Returns true if a tooltip should be shown for the item.
virtual bool ShouldShowTooltip(const LauncherItem& item) = 0;
// Callback used to allow delegate to perform initialization actions that
// depend on the Launcher being in a known state.
virtual void OnLauncherCreated(Launcher* launcher) = 0;
// Callback used to inform the delegate that a specific launcher no longer
// exists.
virtual void OnLauncherDestroyed(Launcher* launcher) = 0;
};
} // namespace ash
#endif // ASH_LAUNCHER_LAUNCHER_DELEGATE_H_
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