ui/views/widget/aero_tooltip_manager.cc

   1 // Copyright (c) 2012 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 #include "ui/views/widget/aero_tooltip_manager.h"
   6
   7 #include <windows.h>
   8 #include <commctrl.h>
   9 #include <shlobj.h>
  10
  11 #include "base/bind.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "ui/base/l10n/l10n_util_win.h"
  14 #include "ui/gfx/point.h"
  15 #include "ui/gfx/win/dpi.h"
  16 #include "ui/gfx/win/hwnd_util.h"
  17
  18 namespace views {
  19
  20 ///////////////////////////////////////////////////////////////////////////////
  21 // AeroTooltipManager, public:
  22
  23 AeroTooltipManager::AeroTooltipManager(Widget* widget)
  24     : TooltipManagerWin(widget),
  25       initial_delay_(0) {
  26 }
  27
  28 AeroTooltipManager::~AeroTooltipManager() {
  29   if (initial_timer_)
  30     initial_timer_->Disown();
  31 }
  32
  33 void AeroTooltipManager::OnMouse(UINT u_msg, WPARAM w_param, LPARAM l_param) {
  34   if (u_msg == WM_MOUSELEAVE) {
  35     last_mouse_pos_.SetPoint(-1, -1);
  36     UpdateTooltip();
  37     return;
  38   }
  39
  40   if (initial_timer_)
  41     initial_timer_->Disown();
  42
  43   if (u_msg == WM_MOUSEMOVE || u_msg == WM_NCMOUSEMOVE) {
  44     gfx::Point mouse_pos_in_pixels(l_param);
  45     gfx::Point mouse_pos = gfx::win::ScreenToDIPPoint(mouse_pos_in_pixels);
  46     if (u_msg == WM_NCMOUSEMOVE) {
  47       // NC message coordinates are in screen coordinates.
  48       POINT temp = mouse_pos_in_pixels.ToPOINT();
  49       ::MapWindowPoints(HWND_DESKTOP, GetParent(), &temp, 1);
  50       mouse_pos_in_pixels.SetPoint(temp.x, temp.y);
  51       mouse_pos = gfx::win::ScreenToDIPPoint(mouse_pos_in_pixels);
  52     }
  53     if (last_mouse_pos_ != mouse_pos) {
  54       last_mouse_pos_ = mouse_pos;
  55       UpdateTooltip(mouse_pos);
  56     }
  57
  58     // Delay opening of the tooltip just in case the user moves their
  59     // mouse to another control. We defer this from Init because we get
  60     // zero if we query it too soon.
  61     if (!initial_delay_) {
  62       initial_delay_ = static_cast<int>(
  63           ::SendMessage(tooltip_hwnd_, TTM_GETDELAYTIME, TTDT_INITIAL, 0));
  64     }
  65     initial_timer_ = new InitialTimer(this);
  66     initial_timer_->Start(initial_delay_);
  67   } else {
  68     // Hide the tooltip and cancel any timers.
  69     ::SendMessage(tooltip_hwnd_, TTM_POP, 0, 0);
  70     ::SendMessage(tooltip_hwnd_, TTM_TRACKACTIVATE, false, (LPARAM)&toolinfo_);
  71     return;
  72   }
  73 }
  74
  75 ///////////////////////////////////////////////////////////////////////////////
  76 // AeroTooltipManager, private:
  77
  78 void AeroTooltipManager::OnTimer() {
  79   initial_timer_ = NULL;
  80
  81   POINT pt = last_mouse_pos_.ToPOINT();
  82   ::ClientToScreen(GetParent(), &pt);
  83
  84   // Set the position and visibility.
  85   if (!tooltip_showing_) {
  86     ::SendMessage(tooltip_hwnd_, TTM_POPUP, 0, 0);
  87     ::SendMessage(tooltip_hwnd_, TTM_TRACKPOSITION, 0, MAKELPARAM(pt.x, pt.y));
  88     ::SendMessage(tooltip_hwnd_, TTM_TRACKACTIVATE, true, (LPARAM)&toolinfo_);
  89   }
  90 }
  91
  92 ///////////////////////////////////////////////////////////////////////////////
  93 // AeroTooltipManager::InitialTimer
  94
  95 AeroTooltipManager::InitialTimer::InitialTimer(AeroTooltipManager* manager)
  96     : manager_(manager) {
  97 }
  98
  99 void AeroTooltipManager::InitialTimer::Start(int time) {
 100   base::MessageLoop::current()->PostDelayedTask(
 101       FROM_HERE,
 102       base::Bind(&InitialTimer::Execute, this),
 103       base::TimeDelta::FromMilliseconds(time));
 104 }
 105
 106 void AeroTooltipManager::InitialTimer::Disown() {
 107   manager_ = NULL;
 108 }
 109
 110 void AeroTooltipManager::InitialTimer::Execute() {
 111   if (manager_)
 112     manager_->OnTimer();
 113 }
 114
 115 }  // namespace views