StaticLink.cpp

/* 
 *      Copyright (C) 2003-2005 Gabest
 *      http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
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 *  any later version.
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 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

// StaticLink.cpp : implementation file
//

#include "stdafx.h"
#include "mplayerc.h"
#include "StaticLink.h"


// CStaticLink

COLORREF CStaticLink::g_colorUnvisited = RGB(0,0,255);         // blue 
COLORREF CStaticLink::g_colorVisited   = RGB(128,0,128);         // purple 

HCURSOR    CStaticLink::g_hCursorLink = NULL; 

IMPLEMENT_DYNAMIC(CStaticLink, CStatic) 

BEGIN_MESSAGE_MAP(CStaticLink, CStatic) 
    ON_WM_NCHITTEST() 
    ON_WM_CTLCOLOR_REFLECT() 
    ON_WM_LBUTTONDOWN() 
    ON_WM_SETCURSOR() 
END_MESSAGE_MAP() 

// Constructor sets default colors = blue/purple. 
// bDeleteOnDestroy is used internally by PixieLib in CPixieDlg. 
// 
CStaticLink::CStaticLink(LPCTSTR lpText, BOOL bDeleteOnDestroy) 
{ 
    m_link = lpText;                                // link text (NULL ==> window text) 
    m_color = g_colorUnvisited;                // not visited yet 
    m_bDeleteOnDestroy = bDeleteOnDestroy;    // delete object with window? 
} 

// Normally,    a static control does not get mouse events unless it has 
// SS_NOTIFY. This achieves the same effect as SS_NOTIFY, but it's fewer 
// lines of code and more reliable than turning on SS_NOTIFY in OnCtlColor 
// because Windows doesn't send WM_CTLCOLOR to bitmap static controls. 
// 
LRESULT CStaticLink::OnNcHitTest(CPoint point) 
{ 
    return HTCLIENT; 
} 

// Handle reflected WM_CTLCOLOR to set custom control color. 
// For a text control, use visited/unvisited colors and underline font. 
// For non-text controls, do nothing. Also ensures SS_NOTIFY is on. 
// 
HBRUSH CStaticLink::CtlColor(CDC* pDC, UINT nCtlColor) 
{ 
    ASSERT(nCtlColor == CTLCOLOR_STATIC); 
    DWORD dwStyle = GetStyle(); 
     
    HBRUSH hbr = NULL; 
    if ((dwStyle & 0xFF) <= SS_RIGHT) { 

        // this is a text control: set up font and colors 
        if (!(HFONT)m_font) { 
            // first time init: create font 
            LOGFONT lf; 
            GetFont()->GetObject(sizeof(lf), &lf); 
            lf.lfUnderline = TRUE; 
            m_font.CreateFontIndirect(&lf); 
        } 

        // use underline font and visited/unvisited colors 
        pDC->SelectObject(&m_font); 
        pDC->SetTextColor(m_color); 
        pDC->SetBkMode(TRANSPARENT); 

        // return hollow brush to preserve parent background color 
        hbr = (HBRUSH)::GetStockObject(HOLLOW_BRUSH); 
    } 
    return hbr; 
} 

// Handle mouse click: navigate link 
// 
void CStaticLink::OnLButtonDown(UINT nFlags, CPoint point) 
{ 
    if (m_link.IsEmpty()) { 
        // no link: try to load from resource string or window text  
        m_link.LoadString(GetDlgCtrlID()) || (GetWindowText(m_link),1); 
        if (m_link.IsEmpty()) 
            return; 
    } 

    // Call ShellExecute to run the file. 
    // For an URL, this means opening it in the browser. 
    // 
    HINSTANCE h = m_link.Navigate(); 
    if ((UINT)h > 32) {                         // success! 
        m_color = g_colorVisited;             // change color 
        Invalidate();                             // repaint  
    } else { 
        MessageBeep(0);        // unable to execute file! 
        TRACE(_T("*** WARNING: CStaticLink: unable to navigate link %s\n"), 
            (LPCTSTR)m_link); 
    } 
} 

// Set "hand" cursor to cue user that this is a link. If app has not set 
// g_hCursorLink, then try to get the cursor from winhlp32.exe, 
// resource 106, which is a pointing finger. This is a bit of a kludge, 
// but it works. 
// 
BOOL CStaticLink::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{ 
    if (g_hCursorLink == NULL) { 
        static BOOL bTriedOnce = FALSE; 
        if (!bTriedOnce) { 
         CString windir; 
         GetWindowsDirectory(windir.GetBuffer(MAX_PATH), MAX_PATH); 
         windir.ReleaseBuffer(); 
         windir += _T("\\winhlp32.exe"); 
         HMODULE hModule = LoadLibrary(windir); 
            if (hModule) { 
                g_hCursorLink = 
                    CopyCursor(::LoadCursor(hModule, MAKEINTRESOURCE(106))); 
            } 
            FreeLibrary(hModule); 
            bTriedOnce = TRUE; 
        } 
    } 
    if (g_hCursorLink) { 
        ::SetCursor(g_hCursorLink); 
        return TRUE; 
    } 
    return FALSE; 
} 

// Normally, a control class is not destoyed when the window is; 
// however, CPixieDlg creates static controls with "new" instead of 
// as class members, so it's convenient to allow the option of destroying 
// object with window. In applications where you want the object to be 
// destoyed along with the window, you can call constructor with 
// bDeleteOnDestroy=TRUE. 
// 
void CStaticLink::PostNcDestroy() 
{ 
    if (m_bDeleteOnDestroy) 
        delete this; 
} 

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