ui/views/widget/aero_tooltip_manager.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_VIEWS_WIDGET_AERO_TOOLTIP_MANAGER_H_
   6 #define UI_VIEWS_WIDGET_AERO_TOOLTIP_MANAGER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "ui/views/widget/tooltip_manager_win.h"
  10
  11 namespace views {
  12
  13 ///////////////////////////////////////////////////////////////////////////////
  14 // AeroTooltipManager
  15 //
  16 //  Default Windows tooltips are broken when using our custom window frame
  17 //  - as soon as the tooltip receives a WM_MOUSEMOVE event, it starts spewing
  18 //  NCHITTEST messages at its parent window (us). These messages have random
  19 //  x/y coordinates and can't be ignored, as the DwmDefWindowProc uses
  20 //  NCHITTEST  messages to determine how to highlight the caption buttons
  21 //  (the buttons then flicker as the hit tests sent by the user's mouse
  22 //  trigger different effects to those sent by the tooltip).
  23 //
  24 //  So instead, we have to partially implement tooltips ourselves using
  25 //  TTF_TRACKed tooltips.
  26 //
  27 // TODO(glen): Resolve this with Microsoft.
  28 class AeroTooltipManager : public TooltipManagerWin {
  29  public:
  30   explicit AeroTooltipManager(Widget* widget);
  31   virtual ~AeroTooltipManager();
  32
  33   virtual void OnMouse(UINT u_msg, WPARAM w_param, LPARAM l_param);
  34
  35  private:
  36   void OnTimer();
  37
  38   class InitialTimer : public base::RefCounted<InitialTimer> {
  39    public:
  40     explicit InitialTimer(AeroTooltipManager* manager);
  41     void Start(int time);
  42     void Disown();
  43     void Execute();
  44
  45    private:
  46     friend class base::RefCounted<InitialTimer>;
  47
  48     ~InitialTimer() {}
  49
  50     AeroTooltipManager* manager_;
  51   };
  52
  53   int initial_delay_;
  54   scoped_refptr<InitialTimer> initial_timer_;
  55 };
  56
  57 }  // namespace views
  58
  59 #endif  // UI_VIEWS_WIDGET_AERO_TOOLTIP_MANAGER_H_