79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// Copyright (c) 2014 GitHub, Inc. All rights reserved.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#ifndef ATOM_BROWSER_UI_WIN_NOTIFY_ICON_HOST_H_
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#define ATOM_BROWSER_UI_WIN_NOTIFY_ICON_HOST_H_
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#include <windows.h>
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#include <vector>
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#include "base/compiler_specific.h"
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#include "base/memory/scoped_ptr.h"
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namespace atom {
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class NotifyIcon;
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// A class that's responsible for increasing, if possible, the visibility
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// of a status tray icon on the taskbar. The default implementation sends
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// a task to a worker thread each time EnqueueChange is called.
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class NotifyIconHostStateChangerProxy {
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public:
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// Called by NotifyIconHost to request upgraded visibility on the icon
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// represented by the |icon_id|, |window| pair.
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virtual void EnqueueChange(UINT icon_id, HWND window) = 0;
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};
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class NotifyIconHost {
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public:
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NotifyIconHost();
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~NotifyIconHost();
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NotifyIcon* CreateNotifyIcon();
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void Remove(NotifyIcon* notify_icon);
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void UpdateIconVisibilityInBackground(NotifyIcon* notify_icon);
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private:
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typedef std::vector<NotifyIcon*> NotifyIcons;
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// Static callback invoked when a message comes in to our messaging window.
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static LRESULT CALLBACK
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WndProcStatic(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
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LRESULT CALLBACK
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WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
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UINT NextIconId();
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// The unique icon ID we will assign to the next icon.
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UINT next_icon_id_;
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// List containing all active NotifyIcons.
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NotifyIcons notify_icons_;
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// The window class of |window_|.
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ATOM atom_;
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// The handle of the module that contains the window procedure of |window_|.
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HMODULE instance_;
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// The window used for processing events.
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HWND window_;
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// The message ID of the "TaskbarCreated" message, sent to us when we need to
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// reset our status icons.
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UINT taskbar_created_message_;
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// Manages changes performed on a background thread to manipulate visibility
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// of notification icons.
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scoped_ptr<NotifyIconHostStateChangerProxy> state_changer_proxy_;
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DISALLOW_COPY_AND_ASSIGN(NotifyIconHost);
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};
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} // namespace atom
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#endif // ATOM_BROWSER_UI_WIN_NOTIFY_ICON_HOST_H_
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