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Hyperlink control

, 22 Mar 2000
A simple drop-in hyperlink control
hyperlink_demo.zip
HLSample.dsp
HLSample.dsw
HLSample.exe
HLSample.plg
res
cursor1.cur
HLSample.ico
hyperlink_src.zip
// HyperLink.h : header file
//
//
// HyperLink static control. Will open the default browser with the given URL
// when the user clicks on the link.
//
// Copyright Chris Maunder, 1997-1999 (cmaunder@mail.com)
// Feel free to use and distribute. May not be sold for profit. 

// 2/29/00 -- P. Shaffer standard font mod.

#if !defined(AFX_HYPERLINK_H__D1625061_574B_11D1_ABBA_00A0243D1382__INCLUDED_)
#define AFX_HYPERLINK_H__D1625061_574B_11D1_ABBA_00A0243D1382__INCLUDED_

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

/////////////////////////////////////////////////////////////////////////////
// CHyperLink window

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

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_HYPERLINK_H__D1625061_574B_11D1_ABBA_00A0243D1382__INCLUDED_)

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Chris Maunder
Founder CodeProject
Canada Canada
Chris is the Co-founder, Administrator, Architect, Chief Editor and Shameless Hack who wrote and runs The Code Project. He's been programming since 1988 while pretending to be, in various guises, an astrophysicist, mathematician, physicist, hydrologist, geomorphologist, defence intelligence researcher and then, when all that got a bit rough on the nerves, a web developer. He is a Microsoft Visual C++ MVP both globally and for Canada locally.
 
His programming experience includes C/C++, C#, SQL, MFC, ASP, ASP.NET, and far, far too much FORTRAN. He has worked on PocketPCs, AIX mainframes, Sun workstations, and a CRAY YMP C90 behemoth but finds notebooks take up less desk space.
 
He dodges, he weaves, and he never gets enough sleep. He is kind to small animals.
 
Chris was born and bred in Australia but splits his time between Toronto and Melbourne, depending on the weather. For relaxation he is into road cycling, snowboarding, rock climbing, and storm chasing.
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