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// Copyright (c) 2010 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 CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_
#define CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_
#pragma once
#include "base/observer_list.h"
#include "base/scoped_ptr.h"
#include "base/string16.h"
class SkBitmap;
namespace menus {
class MenuModel;
}
class StatusIcon {
public:
StatusIcon();
virtual ~StatusIcon();
// Sets the image associated with this status icon.
virtual void SetImage(const SkBitmap& image) = 0;
// Sets the image associated with this status icon when pressed.
virtual void SetPressedImage(const SkBitmap& image) = 0;
// Sets the hover text for this status icon.
virtual void SetToolTip(const string16& tool_tip) = 0;
// Set the context menu for this icon. The icon takes ownership of the passed
// context menu. Passing NULL results in no menu at all.
void SetContextMenu(menus::MenuModel* menu);
class Observer {
public:
virtual ~Observer() {}
// Called when the user clicks on the system tray icon. Clicks that result
// in the context menu being displayed will not be passed to this observer
// (i.e. if there's a context menu set on this status icon, and the user
// right clicks on the icon to display the context menu, OnClicked will not
// be called).
virtual void OnClicked() = 0;
};
// Adds/Removes an observer for clicks on the status icon. If an observer is
// registered, then left clicks on the status icon will result in the observer
// being called, otherwise, both left and right clicks will display the
// context menu (if any).
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Returns true if there are registered click observers.
bool HasObservers();
// Dispatches a click event to the observers.
void DispatchClickEvent();
protected:
// Invoked after a call to SetContextMenu() to let the platform-specific
// subclass update the native context menu based on the new model. If NULL is
// passed, subclass should destroy the native context menu.
virtual void UpdatePlatformContextMenu(menus::MenuModel* model) = 0;
private:
ObserverList<Observer> observers_;
// Context menu, if any.
scoped_ptr<menus::MenuModel> context_menu_contents_;
DISALLOW_COPY_AND_ASSIGN(StatusIcon);
};
#endif // CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_
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