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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.
#include "views/widget/aero_tooltip_manager.h"
#include <windows.h>
#include <commctrl.h>
#include <shlobj.h>
#include "app/l10n_util_win.h"
#include "base/message_loop.h"
#include "gfx/point.h"
namespace views {
///////////////////////////////////////////////////////////////////////////////
// AeroTooltipManager, public:
AeroTooltipManager::AeroTooltipManager(Widget* widget)
: TooltipManagerWin(widget),
initial_delay_(0) {
}
AeroTooltipManager::~AeroTooltipManager() {
if (initial_timer_)
initial_timer_->Disown();
}
void AeroTooltipManager::OnMouse(UINT u_msg, WPARAM w_param, LPARAM l_param) {
if (initial_timer_)
initial_timer_->Disown();
if (u_msg == WM_MOUSEMOVE || u_msg == WM_NCMOUSEMOVE) {
gfx::Point mouse_pos(l_param);
if (u_msg == WM_NCMOUSEMOVE) {
// NC message coordinates are in screen coordinates.
POINT temp = mouse_pos.ToPOINT();
::MapWindowPoints(HWND_DESKTOP, GetParent(), &temp, 1);
mouse_pos.SetPoint(temp.x, temp.y);
}
if (last_mouse_pos_ != mouse_pos) {
last_mouse_pos_ = mouse_pos;
HideKeyboardTooltip();
UpdateTooltip(mouse_pos);
}
// Delay opening of the tooltip just in case the user moves their
// mouse to another control. We defer this from Init because we get
// zero if we query it too soon.
if (!initial_delay_) {
initial_delay_ = static_cast<int>(
::SendMessage(tooltip_hwnd_, TTM_GETDELAYTIME, TTDT_INITIAL, 0));
}
initial_timer_ = new InitialTimer(this);
initial_timer_->Start(initial_delay_);
} else {
// Hide the tooltip and cancel any timers.
::SendMessage(tooltip_hwnd_, TTM_POP, 0, 0);
::SendMessage(tooltip_hwnd_, TTM_TRACKACTIVATE, false, (LPARAM)&toolinfo_);
return;
}
}
void AeroTooltipManager::OnMouseLeave() {
last_mouse_pos_.SetPoint(-1, -1);
UpdateTooltip();
}
///////////////////////////////////////////////////////////////////////////////
// AeroTooltipManager, private:
void AeroTooltipManager::Init() {
// Create the tooltip control.
tooltip_hwnd_ = CreateWindowEx(
WS_EX_TRANSPARENT | l10n_util::GetExtendedTooltipStyles(),
TOOLTIPS_CLASS, NULL, TTS_NOPREFIX, 0, 0, 0, 0,
GetParent(), NULL, NULL, NULL);
l10n_util::AdjustUIFontForWindow(tooltip_hwnd_);
// Add one tool that is used for all tooltips.
toolinfo_.cbSize = sizeof(toolinfo_);
// We use tracking tooltips on Vista to allow us to manually control the
// visibility of the tooltip.
toolinfo_.uFlags = TTF_TRANSPARENT | TTF_IDISHWND | TTF_TRACK | TTF_ABSOLUTE;
toolinfo_.hwnd = GetParent();
toolinfo_.uId = (UINT_PTR)GetParent();
// Setting this tells windows to call GetParent() back (using a WM_NOTIFY
// message) for the actual tooltip contents.
toolinfo_.lpszText = LPSTR_TEXTCALLBACK;
SetRectEmpty(&toolinfo_.rect);
::SendMessage(tooltip_hwnd_, TTM_ADDTOOL, 0, (LPARAM)&toolinfo_);
}
void AeroTooltipManager::OnTimer() {
initial_timer_ = NULL;
POINT pt = last_mouse_pos_.ToPOINT();
::ClientToScreen(GetParent(), &pt);
// Set the position and visibility.
if (!tooltip_showing_) {
::SendMessage(tooltip_hwnd_, TTM_POPUP, 0, 0);
::SendMessage(tooltip_hwnd_, TTM_TRACKPOSITION, 0, MAKELPARAM(pt.x, pt.y));
::SendMessage(tooltip_hwnd_, TTM_TRACKACTIVATE, true, (LPARAM)&toolinfo_);
}
}
///////////////////////////////////////////////////////////////////////////////
// AeroTooltipManager::InitialTimer
AeroTooltipManager::InitialTimer::InitialTimer(AeroTooltipManager* manager)
: manager_(manager) {
}
void AeroTooltipManager::InitialTimer::Start(int time) {
MessageLoop::current()->PostDelayedTask(FROM_HERE, NewRunnableMethod(
this, &InitialTimer::Execute), time);
}
void AeroTooltipManager::InitialTimer::Disown() {
manager_ = NULL;
}
void AeroTooltipManager::InitialTimer::Execute() {
if (manager_)
manager_->OnTimer();
}
} // namespace views
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