src/Utils/MiscUI/hyperlink_base.h

   1 /*
   2  * Module ID: hyperlink.h
   3  * Title    : CHyperLink Declaration.
   4  *
   5  * Author   : Olivier Langlois <olanglois@sympatico.ca>
   6  * Date     : November 15, 2005
   7  *
   8  * To read the article describing this class, visit
   9  * http://www3.sympatico.ca/olanglois/hyperlinkdemo.htm
  10  *
  11  * Note: Strongly inspired by Neal Stublen code
  12  *       Minor ideas come from Chris Maunder and Paul DiLascia code
  13  *
  14  * Revision :
  15  *
  16  * 001        26-Nov-2005 - Olivier Langlois
  17  *            - Added changes to make CHyperLink compatible with UNICODE
  18  *            - Use dynamic memory allocation for the URL string
  19  */
  20
  21 #ifndef   _HYPERLINK_H_
  22 #define   _HYPERLINK_H_
  23
  24 #include <Windows.h>
  25
  26 class CHyperLink
  27 {
  28 public:
  29     CHyperLink(void);
  30     virtual ~CHyperLink(void);
  31
  32     BOOL ConvertStaticToHyperlink(HWND hwndCtl, LPCTSTR strURL);
  33     BOOL ConvertStaticToHyperlink(HWND hwndParent, UINT uiCtlId, LPCTSTR strURL);
  34
  35         BOOL setURL( LPCTSTR strURL);
  36         LPCTSTR getURL(void) const { return m_strURL; }
  37
  38 protected:
  39         /*
  40          * Override if you want to perform some action when the link has the focus
  41          * or when the cursor is over the link such as displaying the URL somewhere.
  42          */
  43         virtual void OnSelect(void)   {}
  44         virtual void OnDeselect(void) {}
  45
  46         LPTSTR   m_strURL;                              // hyperlink URL
  47
  48 private:
  49         static COLORREF g_crLinkColor, g_crVisitedColor;// Hyperlink colors
  50         static HCURSOR  g_hLinkCursor;                  // Cursor for hyperlink
  51         static HFONT    g_UnderlineFont;                // Font for underline display
  52         static int      g_counter;                                              // Global resources user counter
  53     BOOL     m_bOverControl;                        // cursor over control?
  54     BOOL     m_bVisited;                            // Has it been visited?
  55     HFONT    m_StdFont;                             // Standard font
  56         WNDPROC  m_pfnOrigCtlProc;
  57
  58         void createUnderlineFont(void);
  59         static void createLinkCursor(void);
  60     void createGlobalResources(void)
  61         {
  62                 createUnderlineFont();
  63                 createLinkCursor();
  64         }
  65         static void destroyGlobalResources(void)
  66         {
  67                 /*
  68                  * No need to call DestroyCursor() for cursors acquired through
  69                  * LoadCursor().
  70                  */
  71                 g_hLinkCursor   = NULL;
  72                 DeleteObject(g_UnderlineFont);
  73                 g_UnderlineFont = NULL;
  74         }
  75
  76         void Navigate(void);
  77
  78         static void DrawFocusRect(HWND hwnd);
  79     static LRESULT CALLBACK _HyperlinkParentProc(HWND hwnd, UINT message,
  80                                                          WPARAM wParam, LPARAM lParam);
  81         static LRESULT CALLBACK _HyperlinkProc(HWND hwnd, UINT message,
  82                                                    WPARAM wParam, LPARAM lParam);
  83 };
  84
  85 #endif /* _HYPERLINK_H_ */