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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImplicitPlaneWidget2.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkImplicitPlaneWidget2 - 3D widget for manipulating an infinite plane
// .SECTION Description
// This 3D widget defines an infinite plane that can be interactively placed
// in a scene. The widget is assumed to consist of four parts: 1) a plane
// contained in a 2) bounding box, with a 3) plane normal, which is rooted
// at a 4) point on the plane. (The representation paired with this widget
// determines the actual geometry of the widget.)
//
// To use this widget, you generally pair it with a vtkImplicitPlaneRepresentation
// (or a subclass). Variuos options are available for controlling how the
// representation appears, and how the widget functions.
// .SECTION Event Bindings
// By default, the widget responds to the following VTK events (i.e., it
// watches the vtkRenderWindowInteractor for these events):
// <pre>
// If the plane normal is selected:
// LeftButtonPressEvent - select normal
// LeftButtonReleaseEvent - release normal
// MouseMoveEvent - orient the normal vector
// If the origin point is selected:
// LeftButtonPressEvent - select slider (if on slider)
// LeftButtonReleaseEvent - release slider (if selected)
// MouseMoveEvent - move the origin point (constrained to the plane)
// If the plane is selected:
// LeftButtonPressEvent - select slider (if on slider)
// LeftButtonReleaseEvent - release slider (if selected)
// MouseMoveEvent - move the plane
// If the outline is selected:
// LeftButtonPressEvent - select slider (if on slider)
// LeftButtonReleaseEvent - release slider (if selected)
// MouseMoveEvent - move the outline
// In all the cases, independent of what is picked, the widget responds to the
// following VTK events:
// MiddleButtonPressEvent - move the plane
// MiddleButtonReleaseEvent - release the plane
// RightButtonPressEvent - scale the widget's representation
// RightButtonReleaseEvent - stop scaling the widget
// MouseMoveEvent - scale (if right button) or move (if middle button) the widget
// </pre>
//
// Note that the event bindings described above can be changed using this
// class's vtkWidgetEventTranslator. This class translates VTK events
// into the vtkImplicitPlaneWidget2's widget events:
// <pre>
// vtkWidgetEvent::Select -- some part of the widget has been selected
// vtkWidgetEvent::EndSelect -- the selection process has completed
// vtkWidgetEvent::Move -- a request for slider motion has been invoked
// </pre>
//
// In turn, when these widget events are processed, the vtkImplicitPlaneWidget2
// invokes the following VTK events on itself (which observers can listen for):
// <pre>
// vtkCommand::StartInteractionEvent (on vtkWidgetEvent::Select)
// vtkCommand::EndInteractionEvent (on vtkWidgetEvent::EndSelect)
// vtkCommand::InteractionEvent (on vtkWidgetEvent::Move)
// </pre>
//
// .SECTION Caveats
// Note that the widget can be picked even when it is "behind"
// other actors. This is an intended feature and not a bug.
//
// This class, and vtkImplicitPlaneRepresentation, are next generation VTK
// widgets. An earlier version of this functionality was defined in the class
// vtkImplicitPlaneWidget.
// .SECTION See Also
// vtk3DWidget vtkBoxWidget vtkPlaneWidget vtkLineWidget vtkPointWidget
// vtkSphereWidget vtkImagePlaneWidget
#ifndef __vtkImplicitPlaneWidget2_h
#define __vtkImplicitPlaneWidget2_h
#include "vtkAbstractWidget.h"
class vtkImplicitPlaneRepresentation;
class VTK_WIDGETS_EXPORT vtkImplicitPlaneWidget2 : public vtkAbstractWidget
{
public:
// Description:
// Instantiate the object.
static vtkImplicitPlaneWidget2 *New();
// Description:
// Standard vtkObject methods
vtkTypeMacro(vtkImplicitPlaneWidget2,vtkAbstractWidget);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Specify an instance of vtkWidgetRepresentation used to represent this
// widget in the scene. Note that the representation is a subclass of vtkProp
// so it can be added to the renderer independent of the widget.
void SetRepresentation(vtkImplicitPlaneRepresentation *r)
{this->Superclass::SetWidgetRepresentation(reinterpret_cast<vtkWidgetRepresentation*>(r));}
// Description:
// Create the default widget representation if one is not set.
void CreateDefaultRepresentation();
protected:
vtkImplicitPlaneWidget2();
~vtkImplicitPlaneWidget2();
//BTX - manage the state of the widget
int WidgetState;
enum _WidgetState {Start=0,Active};
//ETX
// These methods handle events
static void SelectAction(vtkAbstractWidget*);
static void TranslateAction(vtkAbstractWidget*);
static void ScaleAction(vtkAbstractWidget*);
static void EndSelectAction(vtkAbstractWidget*);
static void MoveAction(vtkAbstractWidget*);
// Description:
// Update the cursor shape based on the interaction state. Returns 1
// if the cursor shape requested is different from the existing one.
int UpdateCursorShape( int interactionState );
private:
vtkImplicitPlaneWidget2(const vtkImplicitPlaneWidget2&); //Not implemented
void operator=(const vtkImplicitPlaneWidget2&); //Not implemented
};
#endif
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