QSlider: Increase handle size -> How ?

[ArneBurghardt]

Hi,

i am designing a GUI for a touchscreen device (Plastique Style). So far everything is fine, except that it is very difficult to hit the slider handle, because it is way to small. Therefore i would like to increase the size of my slider handle.

My first try was to implement a style sheet for my vertical slider, like this one:

/* slider_pwm1 is the name of my slider */
#slider_pwm1::handle:vertical {
  min-width: 50px;
  width: 50px;
}

/* slider_pwm1 is the name of my slider */
#slider_pwm1::handle:vertical {
  min-width: 50px;
  width: 50px;
}

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...but no success...

My second guess was to override the PixelMetric function:

// Override style for better Touchscreen handling
class MyProxyStyle : public QProxyStyle
{
  public:
    int pixelMetric ( PixelMetric metric, const QStyleOption * option = 0, const QWidget * widget = 0 ) const
    {
        switch(metric) {
          case PM_SliderControlThickness  : return 50;
          default                         : return (QProxyStyle::pixelMetric(metric,option,widget));
        }
    }
};
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QApplication::setStyle(new MyProxyStyle);
...
}

// Override style for better Touchscreen handling
class MyProxyStyle : public QProxyStyle
{
  public:
    int pixelMetric ( PixelMetric metric, const QStyleOption * option = 0, const QWidget * widget = 0 ) const
    {
        switch(metric) {
          case PM_SliderControlThickness  : return 50;
          default                         : return (QProxyStyle::pixelMetric(metric,option,widget));
        }
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QApplication::setStyle(new MyProxyStyle);
...
}

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And again i had no success...

Now i am running out of ideas... Does anybody out there has a clue/hint/link to solve this problem ?

Thank you for your help !

Arne