win: Implement tray icon API.

atom/browser/ui/win/notify_icon.h

@@ -0,0 +1,74 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_UI_WIN_NOTIFY_ICON_H_
+#define ATOM_BROWSER_UI_WIN_NOTIFY_ICON_H_
+
+#include <windows.h>
+#include <shellapi.h>
+
+#include <string>
+
+#include "atom/browser/ui/tray_icon.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/win/scoped_gdi_object.h"
+
+namespace gfx {
+class Point;
+}
+
+namespace atom {
+
+class NotifyIconHost;
+
+class NotifyIcon : public TrayIcon {
+ public:
+  // Constructor which provides this icon's unique ID and messaging window.
+  NotifyIcon(NotifyIconHost* host, UINT id, HWND window, UINT message);
+  virtual ~NotifyIcon();
+
+  // Handles a click event from the user - if |left_button_click| is true and
+  // there is a registered observer, passes the click event to the observer,
+  // otherwise displays the context menu if there is one.
+  void HandleClickEvent(const gfx::Point& cursor_pos, bool left_button_click);
+
+  // Re-creates the status tray icon now after the taskbar has been created.
+  void ResetIcon();
+
+  UINT icon_id() const { return icon_id_; }
+  HWND window() const { return window_; }
+  UINT message_id() const { return message_id_; }
+
+  // Overridden from TrayIcon:
+  virtual void SetImage(const gfx::ImageSkia& image) OVERRIDE;
+  virtual void SetPressedImage(const gfx::ImageSkia& image) OVERRIDE;
+  virtual void SetToolTip(const std::string& tool_tip) OVERRIDE;
+  virtual void SetContextMenu(ui::SimpleMenuModel* menu_model) OVERRIDE;
+
+ private:
+  void InitIconData(NOTIFYICONDATA* icon_data);
+
+  // The tray that owns us.  Weak.
+  NotifyIconHost* host_;
+
+  // The unique ID corresponding to this icon.
+  UINT icon_id_;
+
+  // Window used for processing messages from this icon.
+  HWND window_;
+
+  // The message identifier used for status icon messages.
+  UINT message_id_;
+
+  // The currently-displayed icon for the window.
+  base::win::ScopedHICON icon_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotifyIcon);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_UI_WIN_NOTIFY_ICON_H_