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Round Slider Control

, 16 Mar 2000
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A round slider control to allow users to adjust an angle or similar values
  • Download demo project - 82 Kb
  • Download source files - 7 Kb
  • Sample Image - RoundSliderCtrl.jpg

    I needed a round slider control to let my users enter an angle. I thought this could be useful to others, so I wrote a general class for it using some of the functions from Chris Maunder's CRoundButton class.

    To use, simply add a slider to your dialog. Enlarge it until it covers an approximately square area.

    In your dialog class, associate a control variable (say m_rscMySlider), with the slider. If you have told class wizard about CRoundSliderCtrl, you will be able to select it when you define the control variable. If not, just go for CSliderCtrl and manually edit the definition in your dialog header file, changing CSliderCtrl to CRoundSliderCtrl. If you do not like using DDX then you can just subclass the control.

    In OnInitDialog() you would call SetRange(), SetPos(), etc. to customize the look and feel of the round slider control. The full API of the control is as follows:

    	// You may use '%ld' to show the slider value. Default: "%ld°"
    	virtual void SetText(const CString& strNewText);
    	virtual CString GetText() const;
    
    	// Default: 7, Minimum: 5
    	virtual void SetKnobRadius(const int nNewKnobRadius);
    	virtual int GetKnobRadius() const;
    
    	virtual void SetDragByKnobOnly(const bool bDragByKnobOnly);
    	virtual bool GetDragByKnobOnly() const;
    
    	// 0-359, 0 = Top, 90 = Right, 180 = Bottom, 270 = Left
    	virtual void SetZero(const int nZero);
    	virtual int GetZero() const;
    
    	// CW/CCW
    	virtual void SetInverted(const bool bNewInverted = true);
    	virtual bool GetInverted() const;
    
    	virtual void SetRadioButtonStyle(const bool bNewRadioButtonStyle = true);
    	virtual bool GetRadioButtonStyle() const;
    
    	virtual void SetDialColor(const COLORREF crBkgnd);
    	virtual void SetKnobColor(const COLORREF crBkgnd);
    	virtual void SetTextColor(const COLORREF crText);
    
    	virtual void SetFontBold(const bool bSet = true);
    	virtual void SetFontUnderline(const bool bSet = true);
    	virtual void SetFontItalic(const bool bSet = true);
    	virtual void SetFontSize(const int nSize);
    	virtual void SetFontName(const CString& strFont);
    

    License

    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here

    About the Author

    Daniel Frey

    Germany Germany
    No Biography provided

    Comments and Discussions

     
    Generalproblem in DrawCircle Pinmemberdamien_polytech26-Sep-10 22:09 
    GeneralVerifyPos() no longer supported in MFC Pinmembermerano3-Jun-10 23:17 
    GeneralThank you Pinmemberfuturejo13-Jan-09 3:33 
    GeneralExecellent Class Works great , PinmemberScotDolan27-Jun-07 11:46 
    GeneralCongratulations PinmemberSvetoslav Chekanov17-Dec-04 2:54 
    QuestionHow to make it transparent ? Pinmembervisualobeje1-Dec-03 9:32 
    QuestionHow to colour the slider? Pinmembervisualobeje23-Nov-03 6:07 
    QuestionHow to create round slider dynamically? PinmemberEjaz7-Oct-03 23:13 
    AnswerRe: How to create round slider dynamically? Pinmemberwflishh7-May-11 2:07 
    GeneralCan't get NM_RELEASEDCAPTURE PinmemberSuha Aktan10-Jun-03 22:23 
    GeneralLock mouse cursor PinmemberSynetech18-Feb-03 8:10 
    GeneralBugFix: Lost focus while dragging... PinmemberMichael Stammberger5-Mar-02 3:47 
    GeneralA doubt..... PinmemberRejeesh.T.S25-Jul-01 0:44 
    GeneralVery well done!!! PinsussKrakhead15-Sep-00 3:53 

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