Method mouseMoveEvent

Modules/QtWidgetsExt/src/QmitkTransferFunctionCanvas.cpp:102–143

}

void QmitkTransferFunctionCanvas::mouseMoveEvent(QMouseEvent *mouseEvent)
{
  if (m_GrabbedHandle != -1)
  {
    const auto pos = mouseEvent->position().toPoint();
    std::pair<double, double> newPos = this->CanvasToFunction(std::make_pair(pos.x(), pos.y()));

    // X Clamping
    {
      // Check with predecessor
      if (m_GrabbedHandle > 0)
        if (newPos.first <= this->GetFunctionX(m_GrabbedHandle - 1))
          newPos.first = this->GetFunctionX(m_GrabbedHandle);

      // Check with successor
      if (m_GrabbedHandle < this->GetFunctionSize() - 1)
        if (newPos.first >= this->GetFunctionX(m_GrabbedHandle + 1))
          newPos.first = this->GetFunctionX(m_GrabbedHandle);

      // Clamping to histogramm
      if (newPos.first < m_Min)
        newPos.first = m_Min;
      else if (newPos.first > m_Max)
        newPos.first = m_Max;
    }

    // Y Clamping
    {
      if (newPos.second < 0.0)
        newPos.second = 0.0;
      else if (newPos.second > 1.0)
        newPos.second = 1.0;
    }

    // Move selected point
    this->MoveFunctionPoint(m_GrabbedHandle, newPos);

    update();

    mitk::RenderingManager::GetInstance()->RequestUpdateAll();
  }
}

void QmitkTransferFunctionCanvas::mouseReleaseEvent(QMouseEvent *)
{