vtkXYPlotWidget.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkXYPlotWidget_h
#define vtkXYPlotWidget_h
 
#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkInteractorObserver.h"
VTK_ABI_NAMESPACE_BEGIN
class vtkXYPlotActor;
 
class VTKINTERACTIONWIDGETS_EXPORT vtkXYPlotWidget : public vtkInteractorObserver
{
public:
  static vtkXYPlotWidget* New();
  vtkTypeMacro(vtkXYPlotWidget, vtkInteractorObserver);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  virtual void SetXYPlotActor(vtkXYPlotActor*);
  vtkGetObjectMacro(XYPlotActor, vtkXYPlotActor);

  void SetEnabled(int) override;
 
protected:
  vtkXYPlotWidget();
  ~vtkXYPlotWidget() override;
 
  // the actor that is used
  vtkXYPlotActor* XYPlotActor;
 
  // handles the events
  static void ProcessEvents(
    vtkObject* object, unsigned long event, void* clientdata, void* calldata);
 
  // ProcessEvents() dispatches to these methods.
  void OnLeftButtonDown();
  void OnLeftButtonUp();
  void OnMouseMove();
 
  // used to compute relative movements
  float StartPosition[2];
 
  // Manage the state of the widget
  int State;
  enum WidgetState
  {
    Moving = 0,
    AdjustingP1,
    AdjustingP2,
    AdjustingP3,
    AdjustingP4,
    AdjustingE1,
    AdjustingE2,
    AdjustingE3,
    AdjustingE4,
    Inside,
    Outside
  };
 
  // use to determine what state the mouse is over, edge1 p1, etc.
  // returns a state from the WidgetState enum above
  int ComputeStateBasedOnPosition(int X, int Y, int* pos1, int* pos2);
 
  // set the cursor to the correct shape based on State argument
  void SetCursor(int State);
 
private:
  vtkXYPlotWidget(const vtkXYPlotWidget&) = delete;
  void operator=(const vtkXYPlotWidget&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif