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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkScalarBarWidget.h,v $
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 vtkScalarBarWidget - 2D widget for manipulating a scalar bar
// .SECTION Description
// This class provides support for interactively manipulating the position,
// size, and orientation of a scalar bar. It listens to Left mouse events and
// mouse movement. It also listens to Right mouse events and notifies any
// observers of Right mouse events on this object when they occur.
// It will change the cursor shape based on its location. If
// the cursor is over an edge of the scalar bar it will change the cursor
// shape to a resize edge shape. If the position of a scalar bar is moved to
// be close to the center of one of the four edges of the viewport, then the
// scalar bar will change its orientation to align with that edge. This
// orientation is sticky in that it will stay that orientation until the
// position is moved close to another edge.
// .SECTION See Also
// vtkInteractorObserver
#ifndef __vtkScalarBarWidget_h
#define __vtkScalarBarWidget_h
#include "vtkInteractorObserver.h"
class vtkScalarBarActor;
class VTK_WIDGETS_EXPORT vtkScalarBarWidget : public vtkInteractorObserver
{
public:
static vtkScalarBarWidget *New();
vtkTypeRevisionMacro(vtkScalarBarWidget,vtkInteractorObserver);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get the ScalarBar used by this Widget. One is created automatically.
void SetScalarBarActor(vtkScalarBarActor *scalarbar);
vtkGetObjectMacro(ScalarBarActor,vtkScalarBarActor);
// Description:
// Methods for turning the interactor observer on and off.
virtual void SetEnabled(int);
protected:
vtkScalarBarWidget();
~vtkScalarBarWidget();
// the actor that is used
vtkScalarBarActor *ScalarBarActor;
//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 OnRightButtonDown();
void OnRightButtonUp();
void OnMouseMove();
// used to compute relative movements
double StartPosition[2];
//BTX - manage the state of the widget
int State;
// use this to track whether left/right button was pressed to gate
// action on button up event.
int LeftButtonDown;
int RightButtonDown;
enum WidgetState
{
Moving=0,
AdjustingP1,
AdjustingP2,
AdjustingP3,
AdjustingP4,
AdjustingE1,
AdjustingE2,
AdjustingE3,
AdjustingE4,
Inside,
Outside
};
//ETX
// 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:
vtkScalarBarWidget(const vtkScalarBarWidget&); //Not implemented
void operator=(const vtkScalarBarWidget&); //Not implemented
};
#endif
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