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/*=========================================================================
Program: Visualization Toolkit
Module: vtkSliderWidget.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 vtkSliderWidget - set a value by manipulating a slider
// .SECTION Description
// The vtkSliderWidget is used to set a scalar value in an application. This
// class assumes that a slider is moved along a 1D parameter space (e.g., a
// spherical bead that can be moved along a tube). Moving the slider
// modifies the value of the widget, which can be used to set parameters on
// other objects. Note that the actual appearance of the widget depends on
// the specific representation for the widget.
//
// To use this widget, set the widget representation. The representation is
// assumed to consist of a tube, two end caps, and a slider (the details may
// vary depending on the particulars of the representation). Then in the
// representation you will typically set minimum and maximum value, as well
// as the current value. The position of the slider must also be set, as well
// as various properties.
//
// .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 slider bead is selected:
// LeftButtonPressEvent - select slider (if on slider)
// LeftButtonReleaseEvent - release slider (if selected)
// MouseMoveEvent - move slider
// If the end caps or slider tube are selected:
// LeftButtonPressEvent - move (or animate) to cap or point on tube;
// </pre>
//
// Note that the event bindings described above can be changed using this
// class's vtkWidgetEventTranslator. This class translates VTK events
// into the vtkSliderWidget'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 vtkSliderWidget
// 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>
//
#ifndef __vtkSliderWidget_h
#define __vtkSliderWidget_h
#include "vtkAbstractWidget.h"
class vtkSliderRepresentation;
class VTK_WIDGETS_EXPORT vtkSliderWidget : public vtkAbstractWidget
{
public:
// Description:
// Instantiate the class.
static vtkSliderWidget *New();
// Description:
// Standard macros.
vtkTypeMacro(vtkSliderWidget,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(vtkSliderRepresentation *r)
{this->Superclass::SetWidgetRepresentation(reinterpret_cast<vtkWidgetRepresentation*>(r));}
// Description:
// Control the behavior of the slider when selecting the tube or caps. If
// Jump, then selecting the tube, left cap, or right cap causes the slider to
// jump to the selection point. If the mode is Animate, the slider moves
// towards the selection point in NumberOfAnimationSteps number of steps.
// If Off, then the slider does not move.
vtkSetClampMacro(AnimationMode, int, AnimateOff, Animate);
vtkGetMacro(AnimationMode, int);
void SetAnimationModeToOff() { this->SetAnimationMode(AnimateOff); }
void SetAnimationModeToJump() { this->SetAnimationMode(Jump); }
void SetAnimationModeToAnimate() { this->SetAnimationMode(Animate); }
// Description:
// Specify the number of animation steps to take if the animation mode
// is set to animate.
vtkSetClampMacro(NumberOfAnimationSteps,int,1,VTK_LARGE_INTEGER);
vtkGetMacro(NumberOfAnimationSteps,int);
// Description:
// Create the default widget representation if one is not set.
void CreateDefaultRepresentation();
protected:
vtkSliderWidget();
~vtkSliderWidget() {}
// These are the events that are handled
static void SelectAction(vtkAbstractWidget*);
static void EndSelectAction(vtkAbstractWidget*);
static void MoveAction(vtkAbstractWidget*);
void AnimateSlider(int selectionState);
//BTX - manage the state of the widget
int WidgetState;
enum _WidgetState
{
Start=0,
Sliding,
Animating
};
int NumberOfAnimationSteps;
int AnimationMode;
enum AnimationState {
AnimateOff,
Jump,
Animate
};
//ETX
private:
vtkSliderWidget(const vtkSliderWidget&); //Not implemented
void operator=(const vtkSliderWidget&); //Not implemented
};
#endif
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