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up有分： vc中文本显示如何实现超级连接的的下划线

楼主aspnet（小桥流水人家）2001-12-05 09:27:41 在 VC/MFC / 基础类提问

在VC中使用什么函数来实现超级连接的下划线，同是也能显示不同的颜色。既类似浏览器功能的软件。问题点数：90、回复次数：10Top

1 楼yntty（硝磷）回复于 2001-12-05 09:29:59 得分 10

我也要一份Top

2 楼xming076（虚名）回复于 2001-12-05 09:43:39 得分 30

需要自己实现，可以看看这个。
http://www.vckbase.com/article/controls/013120554.htmTop

3 楼pinel（）回复于 2001-12-05 09:45:12 得分 30

/////////////HyperLink.h

class CHyperLink : public CStatic
{
// Construction/destruction
public:
CHyperLink();
virtual ~CHyperLink();

// Attributes
public:

// Operations
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(BOOL bUnderline = TRUE);
BOOL 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);
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?
BOOL m_bUnderline; // underline hyperlink?
BOOL m_bAdjustToFit; // Adjust window size to fit text?
CString m_strURL; // hyperlink URL
CFont m_Font; // Underline font if necessary
HCURSOR m_hLinkCursor; // Cursor for hyperlink
CToolTipCtrl m_ToolTip; // The tooltip

// 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
afx_msg void OnClicked();
DECLARE_MESSAGE_MAP()
};

//////HyperLink.cpp

#include "StdAfx.h"
#include "HyperLink.h"

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

#define TOOLTIP_ID 1

/////////////////////////////////////////////////////////////////////////////
// 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 = ::GetSysColor(COLOR_HIGHLIGHT);
m_bOverControl = FALSE; // Cursor not yet over control
m_bVisited = FALSE; // Hasn't been visited yet.
m_bUnderline = TRUE; // Underline the link?
m_bAdjustToFit = TRUE; // Resize the window to fit the text?
m_strURL.Empty();
}

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

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

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

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

void CHyperLink::OnClicked()
{
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)
{
CStatic::OnMouseMove(nFlags, point);

if (m_bOverControl) // Cursor is currently over control
{
CRect rect;
GetClientRect(rect);

if (!rect.PtInRect(point))
{
m_bOverControl = FALSE;
ReleaseCapture();
RedrawWindow();
return;
}
}
else // Cursor has just moved over control
{
m_bOverControl = TRUE;
RedrawWindow();
SetCapture();
}
}

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

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);
}

// Create the font
LOGFONT lf;
GetFont()->GetLogFont(&lf);
lf.lfUnderline = m_bUnderline;
m_Font.CreateFontIndirect(&lf);
SetFont(&m_Font);

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

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

CStatic::PreSubclassWindow();
}

/////////////////////////////////////////////////////////////////////////////
// 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(BOOL bUnderline /* = TRUE */)
{
m_bUnderline = bUnderline;

if (::IsWindow(GetSafeHwnd()))
{
LOGFONT lf;
GetFont()->GetLogFont(&lf);
lf.lfUnderline = m_bUnderline;

m_Font.DeleteObject();
m_Font.CreateFontIndirect(&lf);

SetFont(&m_Font);

Invalidate();
}
}

BOOL CHyperLink::GetUnderline() const
{
return m_bUnderline;
}

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 rect;
GetWindowRect(rect);

CWnd* pParent = GetParent();
if (pParent)
pParent->ScreenToClient(rect);

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

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

// 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)
rect.DeflateRect(0, (rect.Height() - Extent.cy)/2);
else
rect.bottom = rect.top + Extent.cy;

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

// Move the window
SetWindowPos(NULL, rect.left, rect.top, rect.Width(), rect.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("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 = strstr(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);
result = (HINSTANCE) WinExec(key,showcmd);
}
}
}

return result;
}
Top

4 楼masterz（www.fruitfruit.com）回复于 2001-12-05 10:21:42 得分 10

用CHtmlView 或者webbrowser control来实现类似浏览器功能的软件比较容易Top

5 楼hecCIBN（）回复于 2001-12-05 10:50:18 得分 10

太长了，呵呵Top

6 楼aspnet（小桥流水人家）回复于 2001-12-05 12:56:21 得分 0

我是在embedded vc++下的编程不支持ChtmlView类Top

7 楼pinel（）回复于 2001-12-05 13:00:30 得分 0

不太长吧，呵呵Top

8 楼aspnet（小桥流水人家）回复于 2001-12-05 16:31:57 得分 0

to pinel:
十分感谢，我先去试试！Top

9 楼aspnet（小桥流水人家）回复于 2001-12-05 18:03:38 得分 0

非常可惜：
在embedded VC中不支持ShellExecute函数 ChtmlView类
http://www.vckbase.com/article/controls/013120554.htm

上面提到的HyperLink中也有一些WINCE不支持的类真是气死人！
只能怪自己为什么选择EVC！！！！！！

Top

10 楼aspnet（小桥流水人家）回复于 2001-12-06 08:49:33 得分 0

谢谢Top