void CModelessDlg::OnDestroy()
{
CPersistDlg::OnDestroy();
GetSafeOwner()->SendMessage(UWM_MODELESSDESTROY, WPARAM(this)); // notify owner
}
//
// creates a new balloon window
// Parameters:
// strTitle | Title of balloon
// strContent | Content of balloon
// ptAnchor | point tail of balloon will be "anchor"ed to
// unOptions | One or more of:
// : unCLOSE_ON_LBUTTON_UP | closes window on WM_LBUTTON_UP
// : unCLOSE_ON_MBUTTON_UP | closes window on WM_MBUTTON_UP
// : unCLOSE_ON_RBUTTON_UP | closes window on WM_RBUTTON_UP
// : unCLOSE_ON_LBUTTON_DOWN | closes window on WM_LBUTTON_DOWN
// : unCLOSE_ON_MBUTTON_DOWN | closes window on WM_MBUTTON_DOWN
// : unCLOSE_ON_RBUTTON_DOWN | closes window on WM_RBUTTON_DOWN
// : unCLOSE_ON_MOUSE_MOVE | closes window when user moves mouse past threshhold
// : unCLOSE_ON_KEYPRESS | closes window on the next keypress message sent to this thread. (!!! probably not thread safe !!!)
// : unDELETE_THIS_ON_CLOSE | deletes object when window is closed. Used by LaunchBalloon(), use with care
// : unSHOW_CLOSE_BUTTON | shows close button in upper right
// : unSHOW_INNER_SHADOW | draw inner shadow in balloon
// : unSHOW_TOPMOST | place balloon above all other windows
// : unDISABLE_FADE | disable the fade-in/fade-out effects (overrides system and user settings)
// : unDISABLE_FADEIN | disable the fade-in effect
// : unDISABLE_FADEOUT | disable the fade-out effect
// pParentWnd | Parent window. If NULL will be set to AfxGetMainWnd() and anchor to screen
// strURL | If not empty, when the balloon is clicked ShellExecute() will
// | be called, with strURL passed in.
// unTimeout | If not 0, balloon will automatically close after unTimeout milliseconds.
// hIcon | If not NULL, the icon indicated by hIcon will be displayed at top-left of the balloon.
//
// Returns:
// TRUE if successful, else FALSE
//
BOOL CBalloonHelp::Create(const CString& strTitle, const CString& strContent,
const CPoint& ptAnchor, unsigned int unOptions,
CWnd* pParentWnd /*=NULL*/,
const CString strURL /*= ""*/,
unsigned int unTimeout /*= 0*/,
HICON hIcon /*= NULL*/)
{
m_strContent = strContent;
SetAnchorPoint(ptAnchor, pParentWnd);
m_unOptions = unOptions;
m_strURL = strURL;
m_unTimeout = unTimeout;
if ( NULL != hIcon )
SetIcon(hIcon);
pParentWnd = GetSafeOwner(pParentWnd);
if (NULL == pParentWnd)
return FALSE;
// if no fonts set, use defaults
if ( NULL == m_pContentFont )
{
m_pContentFont = new CFont;
if ( !m_pContentFont->CreateStockObject(DEFAULT_GUI_FONT) )
return FALSE;
}
// title font defaults to bold version of content font
if ( NULL == m_pTitleFont )
{
m_pTitleFont = new CFont;
LOGFONT LogFont;
m_pContentFont->GetLogFont(&LogFont);
LogFont.lfWeight = FW_BOLD;
if ( !m_pTitleFont->CreateFontIndirect(&LogFont) )
return FALSE;
}
if ( !GetClassAtom() ) // couldn't register class
return FALSE;
// check system settings: if fade effects are disabled or unavailable, disable here too
BOOL bFade = FALSE;
::SystemParametersInfo(SPI_GETTOOLTIPANIMATION, 0, &bFade, 0);
if (bFade)
::SystemParametersInfo(SPI_GETTOOLTIPFADE, 0, &bFade, 0);
if (!bFade || NULL == m_fnAnimateWindow)
m_unOptions |= unDISABLE_FADE;
// create invisible at arbitrary position; then position, set region, and finally show
// the idea with WS_EX_TOOLWINDOW is, you can't switch to this using alt+tab
DWORD dwExStyle = WS_EX_TOOLWINDOW;
if ( m_unOptions&unSHOW_TOPMOST ) // make topmost, if requested
dwExStyle |= WS_EX_TOPMOST;
if ( !CreateEx(dwExStyle, _T("BalloonHelpClass"), strTitle, WS_POPUP, CRect(0,0,10,10), pParentWnd, 0, NULL) )
return FALSE;
PositionWindow();
if ( (m_unOptions&unCLOSE_ON_MOUSE_MOVE)
||(m_unOptions&unCLOSE_ON_LBUTTON_UP)
||(m_unOptions&unCLOSE_ON_LBUTTON_DOWN)
||(m_unOptions&unCLOSE_ON_MBUTTON_UP)
||(m_unOptions&unCLOSE_ON_MBUTTON_DOWN)
||(m_unOptions&unCLOSE_ON_RBUTTON_UP)
||(m_unOptions&unCLOSE_ON_RBUTTON_DOWN) )
{
::GetCursorPos(&m_ptMouseOrig);
SetMouseHook();
}
// these need to take effect even if the window receiving them
// is not owned by this process. So, if this process does not
// already have the mouse captured, capture it!
if ( (m_unOptions&unCLOSE_ON_LBUTTON_UP)
||(m_unOptions&unCLOSE_ON_MBUTTON_UP)
||(m_unOptions&unCLOSE_ON_RBUTTON_UP) )
{
// no, i don't particularly need or want to deal with a situation
// where a balloon is being created and another program has captured
// the mouse. If you need it, it shouldn't be too hard, just do it here.
if ( NULL == GetCapture() )
SetCapture();
}
if ( m_unOptions&unCLOSE_ON_KEYPRESS )
SetKeyboardHook();
ShowBalloon();
return TRUE;
}
