Method MouseButtonReleaseEvent

Charts/Core/vtkChartParallelCoordinates.cxx:740–811

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//------------------------------------------------------------------------------
bool vtkChartParallelCoordinates::MouseButtonReleaseEvent(const vtkContextMouseEvent& mouse)
{
  if (mouse.GetButton() == this->Actions.Select())
  {
    if (this->Storage->CurrentAxis < 0)
    {
      this->ClearAllAxesSelections();
      this->Storage->Plot->ResetSelectionRange();
    }
    else
    {
      std::array<float, 2>& range = this->Storage->CurrentSelection;

      float final = mouse.GetScenePos()[1];
      final -= this->Storage->Transform->GetMatrix()->GetElement(1, 2);
      final /= this->Storage->Transform->GetMatrix()->GetElement(1, 1);

      // Set the final mouse position
      if (final > 1.0)
      {
        range[1] = 1.0;
      }
      else if (final < 0.0)
      {
        range[1] = 0.0;
      }
      else
      {
        range[1] = final;
      }

      // Update all range stored based on the new selection
      this->UpdateCurrentAxisSelection(this->Storage->CurrentAxis);

      // To support multiple selection, we need to recalculate all the selection
      this->ResetSelection();

      this->Storage->CurrentSelection[0] = 0;
      this->Storage->CurrentSelection[1] = 0;

      // This is a manual interactive selection
      this->Storage->InteractiveSelection = true;
      this->Storage->ShouldClearCurrentAxeSelection = true;

      if (this->AnnotationLink)
      {
        vtkSelection* selection = vtkSelection::New();
        vtkSelectionNode* node = vtkSelectionNode::New();
        selection->AddNode(node);
        node->SetContentType(vtkSelectionNode::INDICES);
        node->SetFieldType(vtkSelectionNode::POINT);

        node->SetSelectionList(this->Storage->Plot->GetSelection());
        this->AnnotationLink->SetCurrentSelection(selection);
        selection->Delete();
        node->Delete();
      }
    }