C++ (Cpp) WSlider::value Examples

Example #1

File: WSlider.C Project: StevenFarley/wt

void PaintedSlider::updateSliderPosition()
{
  double l = (slider_->orientation() == Horizontal) ? w() : h();
  double pixelsPerUnit = (l - HANDLE_WIDTH) / range();

  double u = ((double)slider_->value() - slider_->minimum()) * pixelsPerUnit;

  if (slider_->orientation() == Horizontal)
    handle_->setOffsets(u, Left);
  else
    handle_->setOffsets(h() - HANDLE_WIDTH - u, Top);
}

Example #2

File: WSlider.C Project: kdeforche/wt

void PaintedSlider::updateSliderPosition()
{
  double l = (slider_->orientation() == Orientation::Horizontal) ? w() : h();
  double pixelsPerUnit = (l - slider_->handleWidth()) / range();

  double u = ((double)slider_->value() - slider_->minimum()) * pixelsPerUnit;

  if (slider_->orientation() == Orientation::Horizontal) {
    handle_->setOffsets(u, Side::Left);
    fill_->setWidth(u + slider_->handleWidth() / 2);
  } else {
    handle_->setOffsets(h() - slider_->handleWidth() - u, Side::Top);
    fill_->setHeight(u + slider_->handleWidth() / 2);
  }
}

Example #3

File: WSlider.C Project: kdeforche/wt

void PaintedSlider::onSliderReleased(int u)
{
  if (slider_->orientation() == Orientation::Horizontal)
    u -= slider_->handleWidth() / 2;
  else
    u = (int)h() - (u + slider_->handleWidth() / 2);

  double l = (slider_->orientation() == Orientation::Horizontal) ? w() : h();

  double pixelsPerUnit = (l - slider_->handleWidth()) / range();

  double v = std::max(slider_->minimum(),
		      std::min(slider_->maximum(),
			       slider_->minimum() 
			       + (int)((double)u / pixelsPerUnit + 0.5)));

  // TODO changed() ?
  slider_->sliderMoved().emit(static_cast<int>(v));

  slider_->setValue(static_cast<int>(v));
  slider_->valueChanged().emit(slider_->value());  

  updateSliderPosition();
}