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// Copyright (c) 2006-2008 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 <atlbase.h>
#include <atlapp.h> // for GET_X/Y_LPARAM
#include <commctrl.h>
#include <shlobj.h>
#include "app/l10n_util_win.h"
#include "base/message_loop.h"
namespace views {
///////////////////////////////////////////////////////////////////////////////
// AeroTooltipManager, public:
AeroTooltipManager::AeroTooltipManager(Widget* widget, HWND parent)
: TooltipManager(widget, parent),
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) {
int x = GET_X_LPARAM(l_param);
int y = GET_Y_LPARAM(l_param);
if (last_mouse_x_ != x || last_mouse_y_ != y) {
last_mouse_x_ = x;
last_mouse_y_ = y;
HideKeyboardTooltip();
UpdateTooltip(x, y);
}
// 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_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_x_ = last_mouse_y_ = -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,
parent_, 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 = parent_;
toolinfo_.uId = (UINT_PTR)parent_;
// Setting this tells windows to call parent_ 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;
pt.x = last_mouse_x_;
pt.y = last_mouse_y_;
::ClientToScreen(parent_, &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,
int time) : manager_(manager) {
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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