Hardness of brush



  • We used qbrush and qpen to draw round dots of different sizes in a qpainter application. The dots of large size look at disks. What I really want is drawing dots with radial gradient of opacity --- similar to the paintbrush selection in Gimp or Photoshop, so that later drawn dots will alpha-blending with those previously drawn or background.

    Can someone suggest how to achieve this? Thanks.

    Guan


  • Moderators

    Hi Guab,

    Have a try with

    Qt::RadialGradientPattern



  • @Eddy said:

    Qt::RadialGradientPattern

    Hi Eddy,

    Thank you very much for the quick response. I tried but didn't have luck. Perhaps, I used it in a wrong way. It seems to me that it only works if you use drawEllipse not drawPoint.

    If you have a sample code to show how it works, I would appreciate it very much.

    Best,
    Guan


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