<![CDATA[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

]]>https://forum.qt.io/topic/59151/hardness-of-brushRSS for NodeTue, 13 Oct 2026 02:44:09 GMTThu, 24 Sep 2015 19:39:52 GMT60<![CDATA[Reply to Hardness of brush on Thu, 24 Sep 2015 20:10:05 GMT]]>@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

]]>https://forum.qt.io/post/291436https://forum.qt.io/post/291436Thu, 24 Sep 2015 20:10:05 GMT<![CDATA[Reply to Hardness of brush on Thu, 24 Sep 2015 19:56:05 GMT]]>Hi Guab,

Have a try with

Qt::RadialGradientPattern

]]>https://forum.qt.io/post/291428https://forum.qt.io/post/291428Thu, 24 Sep 2015 19:56:05 GMT