/*
 * Module ID: hyperlink.h
 * Title    : CHyperLink Declaration.
 *
 * Author   : Olivier Langlois <olivier@olivierlanglois.net>
 * Date     : November 15, 2005
 *
 * To read the article describing this class, visit
 * http://www.olivierlanglois.net/hyperlinkdemo.htm
 *
 * Note: Strongly inspired by Neal Stublen code
 *       Minor ideas come from Chris Maunder and Paul DiLascia code
 *
 * Revision :
 *
 * 001        26-Nov-2005 - Olivier Langlois
 *            - Added changes to make CHyperLink compatible with UNICODE
 *            - Use dynamic memory allocation for the URL string
 */

#ifndef   _HYPERLINK_H_
#define   _HYPERLINK_H_

#include <windows.h>

class CHyperLink
{
public:
    CHyperLink(void);
    virtual ~CHyperLink(void);

    BOOL ConvertStaticToHyperlink(HWND hwndCtl, LPCWSTR strURL);
    BOOL ConvertStaticToHyperlink(HWND hwndParent, UINT uiCtlId, LPCWSTR strURL);

    BOOL setURL( LPCWSTR strURL);
    LPCWSTR getURL(void) const { return m_strURL; }

protected:
    /*
     * Override if you want to perform some action when the link has the focus
     * or when the cursor is over the link such as displaying the URL somewhere.
     */
    virtual void OnSelect(void)   {}
    virtual void OnDeselect(void) {}

    LPWSTR   m_strURL;                              // hyperlink URL

private:
    static COLORREF g_crLinkColor, g_crVisitedColor;// Hyperlink colors
    static HCURSOR  g_hLinkCursor;                  // Cursor for hyperlink
    static HFONT    g_UnderlineFont;                // Font for underline display
    static int      g_counter;                      // Global resources user counter
    BOOL     m_bOverControl;                        // cursor over control?
    BOOL     m_bVisited;                            // Has it been visited?
    HFONT    m_StdFont;                             // Standard font
    WNDPROC  m_pfnOrigCtlProc;

    void createUnderlineFont(void);
    static void createLinkCursor(void);
    void createGlobalResources(void)
    {
        createUnderlineFont();
        createLinkCursor();
    }
    static void destroyGlobalResources(void)
    {
        /*
         * No need to call DestroyCursor() for cursors acquired through
         * LoadCursor().
         */
        g_hLinkCursor   = NULL;
        DeleteObject(g_UnderlineFont);
        g_UnderlineFont = NULL;
    }

    void Navigate(void);

    static void DrawFocusRect(HWND hwnd);
    static LRESULT CALLBACK _HyperlinkParentProc(HWND hwnd, UINT message,
                                                 WPARAM wParam, LPARAM lParam);
    static LRESULT CALLBACK _HyperlinkProc(HWND hwnd, UINT message,
                                           WPARAM wParam, LPARAM lParam);
};

#endif /* _HYPERLINK_H_ */