cvConstrainedDistanceWidget.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
//
// Control Layer: cvConstrainedDistanceWidget
// Based on ParaView: VTK/Interaction/Widgets/vtkLineWidget2.{h,cxx}
//
// Layer hierarchy:
// cvDistanceTool (Qt object) - Presentation Layer
//     ↓ owns
// cvConstrainedDistanceWidget - Control Layer (this class)
//     ↓ owns WidgetRep pointer
// vtkLineRepresentation - Representation Layer
//     ↓ owns (member variables)
// ├─ Point1Representation (vtkHandleRepresentation) - Data Layer
// ├─ Point2Representation (vtkHandleRepresentation) - Data Layer
// └─ LineHandleRepresentation (vtkHandleRepresentation) - Data Layer (middle
// handle)
 
#ifndef cvConstrainedDistanceWidget_h
#define cvConstrainedDistanceWidget_h
 
#include <vtkLineWidget2.h>
 
class cvConstrainedDistanceWidget : public vtkLineWidget2 {
public:
    static cvConstrainedDistanceWidget* New();
    vtkTypeMacro(cvConstrainedDistanceWidget, vtkLineWidget2);
    void PrintSelf(ostream& os, vtkIndent indent) override;
 
    void SetInteractor(vtkRenderWindowInteractor* iren) override;
 
    void SetEnabled(int enabling) override;
 
protected:
    cvConstrainedDistanceWidget();
    ~cvConstrainedDistanceWidget() override;
 
    static void ProcessKeyEvents(vtkObject* object,
                                 unsigned long event,
                                 void* clientdata,
                                 void* calldata);
 
private:
    cvConstrainedDistanceWidget(const cvConstrainedDistanceWidget&) = delete;
    void operator=(const cvConstrainedDistanceWidget&) = delete;
 
    // Keyboard observer IDs and callback command
    unsigned long KeyPressObserverId;
    unsigned long KeyReleaseObserverId;
    vtkCallbackCommand* KeyboardCallbackCommand;
};
 
#endif  // cvConstrainedDistanceWidget_h