Source code of Windows XP (NT5)
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// --------------------------------------------------------------------------
// Module Name: Tooltip.cpp
//
// Copyright (c) 2000, Microsoft Corporation
//
// Class that implements displaying a tooltip balloon.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
#include "shellprv.h"
#include "Tooltip.h"
BOOL IsBiDiLocalizedSystem( void );
// --------------------------------------------------------------------------
// CTooltip::CTooltip
//
// Arguments: hInstance = HINSTANCE of hosting process/DLL.
// hwndParent = HWND of the parenting window.
//
// Returns: <none>
//
// Purpose: Constructor for CTooltip. Creates a tooltip window and
// prepares it for display.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
CTooltip::CTooltip (HINSTANCE hInstance, HWND hwndParent) :
_hwnd(NULL),
_hwndParent(hwndParent)
{
DWORD dwExStyle;
if (((GetWindowLongA(hwndParent, GWL_EXSTYLE) & WS_EX_LAYOUTRTL) != 0) || IsBiDiLocalizedSystem())
{
dwExStyle = WS_EX_LAYOUTRTL;
}
else
{
dwExStyle = 0;
}
_hwnd = CreateWindowEx(dwExStyle,
TOOLTIPS_CLASS,
NULL,
WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP | TTS_BALLOON,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
hwndParent,
NULL,
hInstance,
NULL);
if (_hwnd != NULL)
{
TOOLINFO toolInfo;
TBOOL(SetWindowPos(_hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE));
(LRESULT)SendMessage(_hwnd, CCM_SETVERSION, COMCTL32_VERSION, 0);
ZeroMemory(&toolInfo, sizeof(toolInfo));
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.uFlags = TTF_TRANSPARENT | TTF_TRACK;
toolInfo.uId = PtrToUint(_hwnd);
(LRESULT)SendMessage(_hwnd, TTM_ADDTOOL, 0, reinterpret_cast<LPARAM>(&toolInfo));
(LRESULT)SendMessage(_hwnd, TTM_SETMAXTIPWIDTH, 0, 300);
}
}
// --------------------------------------------------------------------------
// CTooltip::~CTooltip
//
// Arguments: <none>
//
// Returns: <none>
//
// Purpose: Destructor for the CTooltip class. This destroys the tooltip
// window created. If the parent of the tooltip window is
// destroyed before this is invoked user32!DestroyWindow will
// cause the trace to fire. The object's lifetime must be
// carefully managed by the user of this class.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
CTooltip::~CTooltip (void)
{
if (_hwnd != NULL)
{
TBOOL(DestroyWindow(_hwnd));
_hwnd = NULL;
}
}
// --------------------------------------------------------------------------
// CTooltip::SetPosition
//
// Arguments: lPosX = X position of the balloon tip window (screen).
// lPosY = Y position of the balloon tip window (screen).
//
// Returns: <none>
//
// Purpose: Positions the tooltip window at the given screen co-ordinates.
// If the parameters are defaulted then this positions the
// tooltip relative to the parent.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
void CTooltip::SetPosition (LONG lPosX, LONG lPosY) const
{
if ((lPosX == LONG_MIN) && (lPosY == LONG_MIN))
{
RECT rc;
TBOOL(GetWindowRect(_hwndParent, &rc));
lPosX = (rc.left + rc.right) / 2;
lPosY = rc.bottom;
}
(LRESULT)SendMessage(_hwnd, TTM_TRACKPOSITION, 0, MAKELONG(lPosX, lPosY));
}
// --------------------------------------------------------------------------
// CTooltip::SetCaption
//
// Arguments: dwIcon = Icon type to set for the tooltip caption.
// pszCaption = Caption of the tooltip.
//
// Returns: <none>
//
// Purpose: Sets the tooltip caption.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
void CTooltip::SetCaption (DWORD dwIcon, const TCHAR *pszCaption) const
{
(LRESULT)SendMessage(_hwnd, TTM_SETTITLE, dwIcon, reinterpret_cast<LPARAM>(pszCaption));
}
// --------------------------------------------------------------------------
// CTooltip::SetText
//
// Arguments: pszText = Content of the actual tooltip.
//
// Returns: <none>
//
// Purpose: Sets the tooltip text.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
void CTooltip::SetText (const TCHAR *pszText) const
{
TOOLINFO toolInfo;
ZeroMemory(&toolInfo, sizeof(toolInfo));
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.uId = PtrToUint(_hwnd);
toolInfo.lpszText = const_cast<TCHAR*>(pszText);
(LRESULT)SendMessage(_hwnd, TTM_UPDATETIPTEXT, 0, reinterpret_cast<LPARAM>(&toolInfo));
}
// --------------------------------------------------------------------------
// CTooltip::Show
//
// Arguments: <none>
//
// Returns: <none>
//
// Purpose: Shows the tooltip window.
//
// History: 2000-06-12 vtan created
// --------------------------------------------------------------------------
void CTooltip::Show (void) const
{
TOOLINFO toolInfo;
ZeroMemory(&toolInfo, sizeof(toolInfo));
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.uId = PtrToUint(_hwnd);
(LRESULT)SendMessage(_hwnd, TTM_TRACKACTIVATE, TRUE, reinterpret_cast<LPARAM>(&toolInfo));
}