Power Color Picker

Features :

This new control derived from CWnd provides an interface for users to select colors for an object. It is more intuitive than CColorDialog in windows API.

Interface description :

  • right rectangle : luminance.
  • left rectangle : saturation on x axis, hue on y axis.
  • bottom rectangle : currently selected color.

This control is fully resizable on the fly. You could specify a size for each rectangle.
When you move the cursor with shift or ctrl, the color change only on one axis (hue or saturation)

 

How to use it in a dialog :

  • a member variable must be added to the dialog :
    ...

    protected:
    PowerColorPicker picker;
    ...

  • create the picker in the method OnInitDialog() of your dialog :
...

//specify the control size
RECT rect={10,10,390,300}; 
//create control in OnInitDialog()
 picker.Create(NULL,"Haha",WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS ,rect,this, NULL, NULL);

... 
  • define a callback when the user click/move on picker :
    
    
    //define a callback 
    void testfunc(COLORREF ref,void *ClientData)
    {
    	CColorPickerDlg * local= (CColorPickerDlg*)ClientData;
    	
    	char str[256];
    	sprintf(str,"RED: %ld\nGREEN: %ld\nBLUE: %ld",GetRValue(ref),GetGValue(ref),GetBValue(ref));
    
    	OutputDebugString(str);
    
    }
    
    
    ...
    
    //register callbacks in OnInitDialog()
     
    picker.RegisterCallbackOnMove(testfunc,this); 
    picker.RegisterCallbackOnLButtonDown(testfunc,this);
    ...
  • you could define the width of the luminance bar anywhere in your source :
    ...
    
    
    picker.SetLuminanceBarWidth(20); 
    
    ...

Downloads

Download Source Code - 31 Kb
Download Demo Application - 9 Kb


Comments

  • Excellent

    Posted by Ajay Vijay on 11/20/2004 06:04am

    Great!

    Reply
  • Typo and fix for memory leaks...

    Posted by Legacy on 12/29/2000 12:00am

    Originally posted by: Chetan

    First, the typo :
    
    

    In PowerColorPicker.cpp, currently line 585 is

    currentColor = HLStoRGB(currentHue,currentSaturation,currentLuminance);

    to be changed to

    currentColor = HLStoRGB(currentHue,currentLuminance,currentSaturation);

    Second, these lines to be added to the class destructor, in the same file

    if (pickerDC)
    {
    delete pickerDC;
    pickerDC = NULL;
    }

    if (luminanceBarDC)
    {
    delete luminanceBarDC;
    luminanceBarDC = NULL;
    }

    That will remove the memory leaks.

    Otherwise, a very good piece of work.

    Thanks,
    Chetan.

    Reply
  • There are memory leaks!

    Posted by Legacy on 12/06/1999 12:00am

    Originally posted by: pxz

    There are memory leaks!

    Reply
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