dmsv2/Dms/TitleTip.cpp

#include "pch.h"
#include "TitleTip.h"


/////////////////////////////////////////////////////////////////////////////
// CTitleTip
CTitleTip::CTitleTip()
{
    // Register the window class if it has not already been registered.
    WNDCLASS wndcls;
    HINSTANCE hInst = AfxGetInstanceHandle();
    if (!(::GetClassInfo(hInst, TITLETIP_CLASSNAME, &wndcls)))
    {
        // otherwise we need to register a new class
        wndcls.style = CS_SAVEBITS;
        wndcls.lpfnWndProc = ::DefWindowProc;
        wndcls.cbClsExtra = wndcls.cbWndExtra = 0;
        wndcls.hInstance = hInst;
        wndcls.hIcon = NULL;
        wndcls.hCursor = LoadCursor(hInst, IDC_ARROW);
        wndcls.hbrBackground = (HBRUSH)(COLOR_INFOBK + 1);
        wndcls.lpszMenuName = NULL;
        wndcls.lpszClassName = TITLETIP_CLASSNAME;

        if (!AfxRegisterClass(&wndcls))
            AfxThrowResourceException();
    }

    m_dwLastLButtonDown = ULONG_MAX;
    m_dwDblClickMsecs = GetDoubleClickTime();
    m_bCreated = FALSE;
    m_pParentWnd = NULL;
}

CTitleTip::~CTitleTip()
{

}


BEGIN_MESSAGE_MAP(CTitleTip, CWnd)
    //{{AFX_MSG_MAP(CTitleTip)
    ON_WM_MOUSEMOVE()
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CTitleTip message handlers

BOOL CTitleTip::Create(CWnd * pParentWnd)
{
    ASSERT_VALID(pParentWnd);

    // Already created?
    if (m_bCreated)
        return TRUE;

    DWORD dwStyle = WS_BORDER | WS_POPUP;
    DWORD dwExStyle = WS_EX_TOOLWINDOW | WS_EX_TOPMOST;
    m_pParentWnd = pParentWnd;

    m_bCreated = CreateEx(dwExStyle, TITLETIP_CLASSNAME, NULL, dwStyle,
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
        NULL, NULL, NULL);

    return m_bCreated;
}

BOOL CTitleTip::DestroyWindow()
{
    m_bCreated = FALSE;

    return CWnd::DestroyWindow();
}

// Show 		 - Show the titletip if needed
// rectTitle	 - The rectangle within which the original 
//				    title is constrained - in client coordinates
// lpszTitleText - The text to be displayed
// xoffset		 - Number of pixel that the text is offset from
//				   left border of the cell
void CTitleTip::Show(CRect rectTitle, LPCTSTR lpszTitleText, int xoffset /*=0*/,
    LPRECT lpHoverRect /*=NULL*/,
    const LOGFONT* lpLogFont /*=NULL*/,
    COLORREF crTextClr /* CLR_DEFAULT */,
    COLORREF crBackClr /* CLR_DEFAULT */)
{
    if (!IsWindow(m_hWnd))
        Create(m_pParentWnd);

    ASSERT(::IsWindow(GetSafeHwnd()));

    if (rectTitle.IsRectEmpty())
        return;

    // If titletip is already displayed, don't do anything.
    if (IsWindowVisible())
        return;

    m_rectHover = (lpHoverRect != NULL) ? lpHoverRect : rectTitle;
    m_rectHover.right++; m_rectHover.bottom++;

    m_pParentWnd->ClientToScreen(m_rectHover);
    ScreenToClient(m_rectHover);

    // Do not display the titletip is app does not have focus
    if (GetFocus() == NULL)
        return;

    // Define the rectangle outside which the titletip will be hidden.
    // We add a buffer of one pixel around the rectangle
    m_rectTitle.top = -1;
    m_rectTitle.left = -xoffset - 1;
    m_rectTitle.right = rectTitle.Width() - xoffset;
    m_rectTitle.bottom = rectTitle.Height() + 1;

    // Determine the width of the text
    m_pParentWnd->ClientToScreen(rectTitle);

    CClientDC dc(this);
    CString strTitle = _T("");
    strTitle += _T(" ");
    strTitle += lpszTitleText;
    strTitle += _T(" ");

    CFont font, *pOldFont = NULL;
    if (lpLogFont)
    {
        font.CreateFontIndirect(lpLogFont);
        pOldFont = dc.SelectObject(&font);
    }
    else
    {
        // use same font as ctrl
        pOldFont = dc.SelectObject(m_pParentWnd->GetFont());
    }

    CSize size = dc.GetTextExtent(strTitle);

    TEXTMETRIC tm;
    dc.GetTextMetrics(&tm);
    size.cx += tm.tmOverhang;

    CRect rectDisplay = rectTitle;
    rectDisplay.left += xoffset;
    rectDisplay.right = rectDisplay.left + size.cx + xoffset;

    // Do not display if the text fits within available space
    if (rectDisplay.right > rectTitle.right - xoffset)
    {
        // Show the titletip
        SetWindowPos(&wndTop, rectDisplay.left, rectDisplay.top,
            rectDisplay.Width(), rectDisplay.Height(),
            SWP_SHOWWINDOW | SWP_NOACTIVATE);

        // FNA - handle colors correctly
        if (crBackClr != CLR_DEFAULT)
        {
            CBrush backBrush(crBackClr);
            CBrush* pOldBrush = dc.SelectObject(&backBrush);
            CRect rect;
            dc.GetClipBox(&rect);     // Erase the area needed 

            dc.PatBlt(rect.left, rect.top, rect.Width(), rect.Height(), PATCOPY);
            dc.SelectObject(pOldBrush);
        }
        // Set color
        if (crTextClr != CLR_DEFAULT)//FNA
            dc.SetTextColor(crTextClr);//FA

        dc.SetBkMode(TRANSPARENT);
        dc.TextOut(0, 0, strTitle);
        SetCapture();
    }

    dc.SelectObject(pOldFont);
}

void CTitleTip::Hide()
{
    if (!::IsWindow(GetSafeHwnd()))
        return;

    if (GetCapture()->GetSafeHwnd() == GetSafeHwnd())
        ReleaseCapture();

    ShowWindow(SW_HIDE);
}

void CTitleTip::OnMouseMove(UINT nFlags, CPoint point)
{
    if (!m_rectHover.PtInRect(point))
    {
        Hide();

        // Forward the message
        ClientToScreen(&point);
        CWnd *pWnd = WindowFromPoint(point);
        if (pWnd == this)
            pWnd = m_pParentWnd;

        int hittest = (int)pWnd->SendMessage(WM_NCHITTEST, 0, MAKELONG(point.x, point.y));

        if (hittest == HTCLIENT) {
            pWnd->ScreenToClient(&point);
            pWnd->PostMessage(WM_MOUSEMOVE, nFlags, MAKELONG(point.x, point.y));
        }
        else {
            pWnd->PostMessage(WM_NCMOUSEMOVE, hittest, MAKELONG(point.x, point.y));
        }
    }
}

BOOL CTitleTip::PreTranslateMessage(MSG* pMsg)
{
    // Used to qualify WM_LBUTTONDOWN messages as double-clicks
    DWORD dwTick = 0;
    BOOL bDoubleClick = FALSE;

    CWnd *pWnd;
    int hittest;
    switch (pMsg->message)
    {
    case WM_LBUTTONDOWN:
        // Get tick count since last LButtonDown
        dwTick = GetTickCount();
        bDoubleClick = ((dwTick - m_dwLastLButtonDown) <= m_dwDblClickMsecs);
        m_dwLastLButtonDown = dwTick;
        // NOTE: DO NOT ADD break; STATEMENT HERE! Let code fall through

    case WM_RBUTTONDOWN:
    case WM_MBUTTONDOWN:
    {
        POINTS pts = MAKEPOINTS(pMsg->lParam);
        POINT  point;
        point.x = pts.x;
        point.y = pts.y;

        ClientToScreen(&point);
        Hide();

        pWnd = WindowFromPoint(point);
        if (!pWnd)
            return CWnd::PreTranslateMessage(pMsg);

        if (pWnd->GetSafeHwnd() == GetSafeHwnd())
            pWnd = m_pParentWnd;

        hittest = (int)pWnd->SendMessage(WM_NCHITTEST, 0, MAKELONG(point.x, point.y));

        if (hittest == HTCLIENT)
        {
            pWnd->ScreenToClient(&point);
            pMsg->lParam = MAKELONG(point.x, point.y);
        }
        else
        {
            switch (pMsg->message) {
            case WM_LBUTTONDOWN:
                pMsg->message = WM_NCLBUTTONDOWN;
                break;
            case WM_RBUTTONDOWN:
                pMsg->message = WM_NCRBUTTONDOWN;
                break;
            case WM_MBUTTONDOWN:
                pMsg->message = WM_NCMBUTTONDOWN;
                break;
            }
            pMsg->wParam = hittest;
            pMsg->lParam = MAKELONG(point.x, point.y);
        }


        // If this is the 2nd WM_LBUTTONDOWN in x milliseconds,
        // post a WM_LBUTTONDBLCLK message instead of a single click.
        pWnd->PostMessage(bDoubleClick ? WM_LBUTTONDBLCLK : pMsg->message,
            pMsg->wParam,
            pMsg->lParam);
        return TRUE;
    }

    case WM_KEYDOWN:
    case WM_SYSKEYDOWN:
        Hide();
        m_pParentWnd->PostMessage(pMsg->message, pMsg->wParam, pMsg->lParam);
        return TRUE;
    }

    if (GetFocus() == NULL)
    {
        Hide();
        return TRUE;
    }

    return CWnd::PreTranslateMessage(pMsg);
}