C++ (Cpp) WSlider::paintTick Examples

Example #1

File: WSlider.C Project: kdeforche/wt

void PaintedSlider::paintEvent(WPaintDevice *paintDevice)
{
  int tickInterval = slider_->tickInterval();
  int r = range();

  if (r == 0) {
    // Empty range, don't paint anything
    return;
  }

  if (tickInterval == 0)
    tickInterval = r / 2;

  int numTicks = tickInterval == 0 ? 2 : r / tickInterval + 1;
  if (numTicks < 1)
    return;

  int w = 0, h = 0;

  switch (slider_->orientation()) {
  case Orientation::Horizontal:
    w = (int)paintDevice->width().toPixels();
    h = (int)paintDevice->height().toPixels();
    break;
  case Orientation::Vertical:
    w = (int)paintDevice->height().toPixels();
    h = (int)paintDevice->width().toPixels();
  }

  double tickStep = ((double)w + 10 - slider_->handleWidth()) / (numTicks - 1);

  WPainter painter(paintDevice);

  for (int i = 0; i < numTicks; ++i) {
    int v = slider_->minimum() + i * tickInterval;
    int x = -5 + slider_->handleWidth()/2 + (int) (i * tickStep);

    switch (slider_->orientation()) {
    case Orientation::Horizontal:
      slider_->paintTick(painter, v, x, h/2);
      break;
    case Orientation::Vertical:
      slider_->paintTick(painter, v, h/2, w - x);
    }
  }
}