CStatic类

 // HyperLink.h: interface for the CHyperLink class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_HYPERLINK_H__80F23FCC_3A7D_49EB_9838_96D8C03F8583__INCLUDED_)
#define AFX_HYPERLINK_H__80F23FCC_3A7D_49EB_9838_96D8C03F8583__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CHyperLink : public CStatic 
{
public:
 CHyperLink();
 virtual ~CHyperLink();
public:
    enum UnderLineOptions { ulHover = -1, ulNone = 0, ulAlways = 1};

// Attributes
public:
    void SetURL(CString strURL);
    CString GetURL() const;

    void SetColours(COLORREF crLinkColour, COLORREF crVisitedColour,
                    COLORREF crHoverColour = -1);
    COLORREF GetLinkColour() const;
    COLORREF GetVisitedColour() const;
    COLORREF GetHoverColour() const;

    void SetVisited(BOOL bVisited = TRUE);
    BOOL GetVisited() const;

    void SetLinkCursor(HCURSOR hCursor);
    HCURSOR GetLinkCursor() const;

    void SetUnderline(int nUnderline = ulHover);
    int  GetUnderline() const;

    void SetAutoSize(BOOL bAutoSize = TRUE);
    BOOL GetAutoSize() const;

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CHyperLink)
    public:
    virtual BOOL PreTranslateMessage(MSG* pMsg);
    virtual BOOL DestroyWindow();
    protected:
    virtual void PreSubclassWindow();
    //}}AFX_VIRTUAL

// Implementation
protected:
    HINSTANCE GotoURL(LPCTSTR url, int showcmd);
    void ReportError(int nError);
    LONG GetRegKey(HKEY key, LPCTSTR subkey, LPTSTR retdata);
    void PositionWindow();
    void SetDefaultCursor();

// Protected attributes
protected:
    COLORREF m_crLinkColour, m_crVisitedColour;     // Hyperlink colours
    COLORREF m_crHoverColour;                       // Hover colour
    BOOL     m_bOverControl;                        // cursor over control?
    BOOL     m_bVisited;                            // Has it been visited?
    int      m_nUnderline;                          // underline hyperlink?
    BOOL     m_bAdjustToFit;                        // Adjust window size to fit text?
    CString  m_strURL;                              // hyperlink URL
    CFont    m_UnderlineFont;                       // Font for underline display
    CFont    m_StdFont;                             // Standard font
    HCURSOR  m_hLinkCursor;                         // Cursor for hyperlink
    CToolTipCtrl m_ToolTip;                         // The tooltip
    UINT     m_nTimerID;

    // Generated message map functions
protected:
    //{{AFX_MSG(CHyperLink)
    afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);
    afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg void OnTimer(UINT nIDEvent);
    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
    //}}AFX_MSG
    afx_msg void OnClicked();
    DECLARE_MESSAGE_MAP()
};

#endif // !defined(AFX_HYPERLINK_H__80F23FCC_3A7D_49EB_9838_96D8C03F8583__INCLUDED_)

 

// HyperLink.cpp: implementation of the CHyperLink class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MainPage.h"
#include "HyperLink.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

#include "atlconv.h"    // for Unicode conversion - requires #include <afxdisp.h> // MFC OLE automation classes

#define TOOLTIP_ID 1

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// CHyperLink

CHyperLink::CHyperLink()
{
    m_hLinkCursor       = NULL;                 // No cursor as yet
    m_crLinkColour      = RGB(  0,   0, 238);   // Blue
    m_crVisitedColour   = RGB( 85,  26, 139);   // Purple
    m_crHoverColour     = RGB(255,   0,   0);   // Red
    m_bOverControl      = FALSE;                // Cursor not yet over control
    m_bVisited          = FALSE;                // Hasn't been visited yet.
    m_nUnderline        = ulHover;              // Underline the link?
    m_bAdjustToFit      = TRUE;                 // Resize the window to fit the text?
    m_strURL.Empty();
    m_nTimerID          = 100;
}

CHyperLink::~CHyperLink()
{
    m_UnderlineFont.DeleteObject();
}

/////////////////////////////////////////////////////////////////////////////
// CHyperLink overrides

BOOL CHyperLink::DestroyWindow()
{
    KillTimer(m_nTimerID);
   
    return CStatic::DestroyWindow();
}

BOOL CHyperLink::PreTranslateMessage(MSG* pMsg)
{
    m_ToolTip.RelayEvent(pMsg);
    return CStatic::PreTranslateMessage(pMsg);
}

void CHyperLink::PreSubclassWindow()
{
    // We want to get mouse clicks via STN_CLICKED
    DWORD dwStyle = GetStyle();
    ::SetWindowLong(GetSafeHwnd(), GWL_STYLE, dwStyle | SS_NOTIFY);
   
    // Set the URL as the window text
    if (m_strURL.IsEmpty())
        GetWindowText(m_strURL);

    // Check that the window text isn't empty. If it is, set it as the URL.
    CString strWndText;
    GetWindowText(strWndText);
    if (strWndText.IsEmpty())
    {
        ASSERT(!m_strURL.IsEmpty());    // Window and URL both NULL. DUH!
        SetWindowText(m_strURL);
    }

    CFont* pFont = GetFont();
    if (!pFont)
    {
        HFONT hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
        if (hFont == NULL)
            hFont = (HFONT) GetStockObject(ANSI_VAR_FONT);
        if (hFont)
            pFont = CFont::FromHandle(hFont);
    }
    ASSERT(pFont->GetSafeHandle());

    // Create the underline font
    LOGFONT lf;
    pFont->GetLogFont(&lf);
    m_StdFont.CreateFontIndirect(&lf);
    lf.lfUnderline = (BYTE) TRUE;
    m_UnderlineFont.CreateFontIndirect(&lf);

    PositionWindow();        // Adjust size of window to fit URL if necessary
    SetDefaultCursor();      // Try and load up a "hand" cursor
    SetUnderline();

    // Create the tooltip
    CRect rect;
    GetClientRect(rect);
    m_ToolTip.Create(this);
    m_ToolTip.AddTool(this, m_strURL, rect, TOOLTIP_ID);

    CStatic::PreSubclassWindow();
}

BEGIN_MESSAGE_MAP(CHyperLink, CStatic)
    //{{AFX_MSG_MAP(CHyperLink)
    ON_WM_CTLCOLOR_REFLECT()
    ON_WM_SETCURSOR()
    ON_WM_MOUSEMOVE()
    ON_WM_TIMER()
    ON_CONTROL_REFLECT(STN_CLICKED, OnClicked)
    ON_WM_ERASEBKGND()
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHyperLink message handlers

void CHyperLink::OnClicked()
{
    m_bOverControl = FALSE;
    int result = (int)GotoURL(m_strURL, SW_SHOW);
    m_bVisited = (result > HINSTANCE_ERROR);
    if (!m_bVisited)
    {
        MessageBeep(MB_ICONEXCLAMATION);     // Unable to follow link
        ReportError(result);
    }
    else
        SetVisited();                        // Repaint to show visited colour
}

HBRUSH CHyperLink::CtlColor(CDC* pDC, UINT nCtlColor)
{
    ASSERT(nCtlColor == CTLCOLOR_STATIC);

    if (m_bOverControl)
        pDC->SetTextColor(m_crHoverColour);
    else if (m_bVisited)
        pDC->SetTextColor(m_crVisitedColour);
    else
        pDC->SetTextColor(m_crLinkColour);

    // transparent text.
    pDC->SetBkMode(TRANSPARENT);
    return (HBRUSH)GetStockObject(NULL_BRUSH);
}

void CHyperLink::OnMouseMove(UINT nFlags, CPoint point)
{
    if (!m_bOverControl)        // Cursor has just moved over control
    {
        m_bOverControl = TRUE;

        if (m_nUnderline == ulHover)
            SetFont(&m_UnderlineFont);
        Invalidate();

        SetTimer(m_nTimerID, 100, NULL);
    }
    CStatic::OnMouseMove(nFlags, point);
}

void CHyperLink::OnTimer(UINT nIDEvent)
{
    CPoint p(GetMessagePos());
    ScreenToClient(&p);

    CRect rect;
    GetClientRect(rect);
    if (!rect.PtInRect(p))
    {
        m_bOverControl = FALSE;
        KillTimer(m_nTimerID);

        if (m_nUnderline != ulAlways)
            SetFont(&m_StdFont);
        rect.bottom+=10;
        InvalidateRect(rect);
    }
   
    CStatic::OnTimer(nIDEvent);
}

BOOL CHyperLink::OnSetCursor(CWnd* /*pWnd*/, UINT /*nHitTest*/, UINT /*message*/)
{
    if (m_hLinkCursor)
    {
        ::SetCursor(m_hLinkCursor);
        return TRUE;
    }
    return FALSE;
}

BOOL CHyperLink::OnEraseBkgnd(CDC* pDC)
{
    CRect rect;
    GetClientRect(rect);
    pDC->FillSolidRect(rect, ::GetSysColor(COLOR_3DFACE));

    return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CHyperLink operations

void CHyperLink::SetURL(CString strURL)
{
    m_strURL = strURL;

    if (::IsWindow(GetSafeHwnd())) {
        PositionWindow();
        m_ToolTip.UpdateTipText(strURL, this, TOOLTIP_ID);
    }
}

CString CHyperLink::GetURL() const
{
    return m_strURL;  
}

void CHyperLink::SetColours(COLORREF crLinkColour, COLORREF crVisitedColour,
                            COLORREF crHoverColour /* = -1 */)
{
    m_crLinkColour    = crLinkColour;
    m_crVisitedColour = crVisitedColour;

    if (crHoverColour == -1)
        m_crHoverColour = ::GetSysColor(COLOR_HIGHLIGHT);
    else
        m_crHoverColour = crHoverColour;

    if (::IsWindow(m_hWnd))
        Invalidate();
}

COLORREF CHyperLink::GetLinkColour() const
{
    return m_crLinkColour;
}

COLORREF CHyperLink::GetVisitedColour() const
{
    return m_crVisitedColour;
}

COLORREF CHyperLink::GetHoverColour() const
{
    return m_crHoverColour;
}

void CHyperLink::SetVisited(BOOL bVisited /* = TRUE */)
{
    m_bVisited = bVisited;

    if (::IsWindow(GetSafeHwnd()))
        Invalidate();
}

BOOL CHyperLink::GetVisited() const
{
    return m_bVisited;
}

void CHyperLink::SetLinkCursor(HCURSOR hCursor)
{
    m_hLinkCursor = hCursor;
    if (m_hLinkCursor == NULL)
        SetDefaultCursor();
}

HCURSOR CHyperLink::GetLinkCursor() const
{
    return m_hLinkCursor;
}

void CHyperLink::SetUnderline(int nUnderline /*=ulHover*/)
{
    if (m_nUnderline == nUnderline)
        return;

    if (::IsWindow(GetSafeHwnd()))
    {
        if (nUnderline == ulAlways)
            SetFont(&m_UnderlineFont);
        else
            SetFont(&m_StdFont);

        Invalidate();
    }

    m_nUnderline = nUnderline;
}

int CHyperLink::GetUnderline() const
{
    return m_nUnderline;
}

void CHyperLink::SetAutoSize(BOOL bAutoSize /* = TRUE */)
{
    m_bAdjustToFit = bAutoSize;

    if (::IsWindow(GetSafeHwnd()))
        PositionWindow();
}

BOOL CHyperLink::GetAutoSize() const
{
    return m_bAdjustToFit;
}

// Move and resize the window so that the window is the same size
// as the hyperlink text. This stops the hyperlink cursor being active
// when it is not directly over the text. If the text is left justified
// then the window is merely shrunk, but if it is centred or right
// justified then the window will have to be moved as well.
//
// Suggested by P錶 K. T鴑der

void CHyperLink::PositionWindow()
{
    if (!::IsWindow(GetSafeHwnd()) || !m_bAdjustToFit)
        return;

    // Get the current window position
    CRect WndRect, ClientRect;
    GetWindowRect(WndRect);
    GetClientRect(ClientRect);

    ClientToScreen(ClientRect);

    CWnd* pParent = GetParent();
    if (pParent)
    {
        pParent->ScreenToClient(WndRect);
        pParent->ScreenToClient(ClientRect);
    }

    // Get the size of the window text
    CString strWndText;
    GetWindowText(strWndText);

    CDC* pDC = GetDC();
    CFont* pOldFont = pDC->SelectObject(&m_UnderlineFont);
    CSize Extent = pDC->GetTextExtent(strWndText);
    pDC->SelectObject(pOldFont);
    ReleaseDC(pDC);

    // Adjust for window borders
    Extent.cx += WndRect.Width() - ClientRect.Width();
    Extent.cy += WndRect.Height() - ClientRect.Height();

    // Get the text justification via the window style
    DWORD dwStyle = GetStyle();

    // Recalc the window size and position based on the text justification
    if (dwStyle & SS_CENTERIMAGE)
        WndRect.DeflateRect(0, (WndRect.Height() - Extent.cy)/2);
    else
        WndRect.bottom = WndRect.top + Extent.cy;

    if (dwStyle & SS_CENTER)  
        WndRect.DeflateRect((WndRect.Width() - Extent.cx)/2, 0);
    else if (dwStyle & SS_RIGHT)
        WndRect.left  = WndRect.right - Extent.cx;
    else // SS_LEFT = 0, so we can't test for it explicitly
        WndRect.right = WndRect.left + Extent.cx;

    // Move the window
    SetWindowPos(NULL, WndRect.left, WndRect.top, WndRect.Width(), WndRect.Height(), SWP_NOZORDER);
}

/////////////////////////////////////////////////////////////////////////////
// CHyperLink implementation

// The following appeared in Paul DiLascia's Jan 1998 MSJ articles.
// It loads a "hand" cursor from the winhlp32.exe module
void CHyperLink::SetDefaultCursor()
{
    if (m_hLinkCursor == NULL)                // No cursor handle - load our own
    {
        // Get the windows directory
        CString strWndDir;
        GetWindowsDirectory(strWndDir.GetBuffer(MAX_PATH), MAX_PATH);
        strWndDir.ReleaseBuffer();

        strWndDir += _T("//winhlp32.exe");
        // This retrieves cursor #106 from winhlp32.exe, which is a hand pointer
        HMODULE hModule = LoadLibrary(strWndDir);
        if (hModule) {
            HCURSOR hHandCursor = ::LoadCursor(hModule, MAKEINTRESOURCE(106));
            if (hHandCursor)
                m_hLinkCursor = CopyCursor(hHandCursor);
        }
        FreeLibrary(hModule);
    }
}

LONG CHyperLink::GetRegKey(HKEY key, LPCTSTR subkey, LPTSTR retdata)
{
    HKEY hkey;
    LONG retval = RegOpenKeyEx(key, subkey, 0, KEY_QUERY_VALUE, &hkey);

    if (retval == ERROR_SUCCESS) {
        long datasize = MAX_PATH;
        TCHAR data[MAX_PATH];
        RegQueryValue(hkey, NULL, data, &datasize);
        lstrcpy(retdata,data);
        RegCloseKey(hkey);
    }

    return retval;
}

void CHyperLink::ReportError(int nError)
{
    CString str;
    switch (nError) {
        case 0:                       str = "The operating system is out/nof memory or resources."; break;
        case SE_ERR_PNF:              str = "The specified path was not found."; break;
        case SE_ERR_FNF:              str = "The specified file was not found."; break;
        case ERROR_BAD_FORMAT:        str = "The .EXE file is invalid/n(non-Win32 .EXE or error in .EXE image)."; break;
        case SE_ERR_ACCESSDENIED:     str = "The operating system denied/naccess to the specified file."; break;
        case SE_ERR_ASSOCINCOMPLETE:  str = "The filename association is/nincomplete or invalid."; break;
        case SE_ERR_DDEBUSY:          str = "The DDE transaction could not/nbe completed because other DDE transactions/nwere being processed."; break;
        case SE_ERR_DDEFAIL:          str = "The DDE transaction failed."; break;
        case SE_ERR_DDETIMEOUT:       str = "The DDE transaction could not/nbe completed because the request timed out."; break;
        case SE_ERR_DLLNOTFOUND:      str = "The specified dynamic-link library was not found."; break;
        case SE_ERR_NOASSOC:          str = "There is no application associated/nwith the given filename extension."; break;
        case SE_ERR_OOM:              str = "There was not enough memory to complete the operation."; break;
        case SE_ERR_SHARE:            str = "A sharing violation occurred. ";
        default:                      str.Format(_T("Unknown Error (%d) occurred."), nError); break;
    }
    str = "Unable to open hyperlink:/n/n" + str;
    AfxMessageBox(str, MB_ICONEXCLAMATION | MB_OK);
}

HINSTANCE CHyperLink::GotoURL(LPCTSTR url, int showcmd)
{
    TCHAR key[MAX_PATH + MAX_PATH];

    // First try ShellExecute()
    HINSTANCE result = ShellExecute(NULL, _T("open"), url, NULL,NULL, showcmd);

    // If it failed, get the .htm regkey and lookup the program
    if ((UINT)result <= HINSTANCE_ERROR) {

        if (GetRegKey(HKEY_CLASSES_ROOT, _T(".htm"), key) == ERROR_SUCCESS) {
            lstrcat(key, _T("//shell//open//command"));

            if (GetRegKey(HKEY_CLASSES_ROOT,key,key) == ERROR_SUCCESS) {
                TCHAR *pos;
                pos = _tcsstr(key, _T("/"%1/""));
                if (pos == NULL) {                     // No quotes found
                    pos = _tcsstr(key, _T("%1"));      // Check for %1, without quotes
                    if (pos == NULL)                   // No parameter at all...
                        pos = key+lstrlen(key)-1;
                    else
                        *pos = '/0';                   // Remove the parameter
                }
                else
                    *pos = '/0';                       // Remove the parameter

                lstrcat(pos, _T(" "));
                lstrcat(pos, url);

                USES_CONVERSION;
                result = (HINSTANCE) WinExec(T2A(key),showcmd);
            }
        }
    }

    return result;
}