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vtkScalarBarWidget.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkScalarBarWidget.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00044 #ifndef __vtkScalarBarWidget_h
00045 #define __vtkScalarBarWidget_h
00046 
00047 #include "vtkInteractorObserver.h"
00048 class vtkScalarBarActor;
00049 
00050 class VTK_HYBRID_EXPORT vtkScalarBarWidget : public vtkInteractorObserver
00051 {
00052 public:
00053   static vtkScalarBarWidget *New();
00054   vtkTypeRevisionMacro(vtkScalarBarWidget,vtkInteractorObserver);
00055   void PrintSelf(ostream& os, vtkIndent indent);
00056 
00058 
00059   void SetScalarBarActor(vtkScalarBarActor *scalarbar);
00060   vtkGetObjectMacro(ScalarBarActor,vtkScalarBarActor);
00062   
00064   virtual void SetEnabled(int);
00065 
00066 protected:
00067   vtkScalarBarWidget();
00068   ~vtkScalarBarWidget();
00069 
00070   // the actor that is used
00071   vtkScalarBarActor *ScalarBarActor;
00072 
00073   //handles the events
00074   static void ProcessEvents(vtkObject* object, 
00075                             unsigned long event,
00076                             void* clientdata, 
00077                             void* calldata);
00078 
00079   // ProcessEvents() dispatches to these methods.
00080   void OnLeftButtonDown();
00081   void OnLeftButtonUp();
00082   void OnRightButtonDown();
00083   void OnRightButtonUp();
00084   void OnMouseMove();
00085 
00086   // used to compute relative movements
00087   float StartPosition[2];
00088   
00089 //BTX - manage the state of the widget
00090   int State;
00091   // use this to track whether left/right button was pressed to gate
00092   // action on button up event.
00093   int LeftButtonDown;
00094   int RightButtonDown;
00095   enum WidgetState
00096   {
00097     Moving=0,
00098     AdjustingP1,
00099     AdjustingP2,
00100     AdjustingP3,
00101     AdjustingP4,
00102     AdjustingE1,
00103     AdjustingE2,
00104     AdjustingE3,
00105     AdjustingE4,
00106     Inside,
00107     Outside
00108   };
00109 //ETX
00110 
00111   // use to determine what state the mouse is over, edge1 p1, etc.
00112   // returns a state from the WidgetState enum above
00113   int ComputeStateBasedOnPosition(int X, int Y, int *pos1, int *pos2);
00114 
00115   // set the cursor to the correct shape based on State argument
00116   void SetCursor(int State);
00117 
00118 private:
00119   vtkScalarBarWidget(const vtkScalarBarWidget&);  //Not implemented
00120   void operator=(const vtkScalarBarWidget&);  //Not implemented
00121 };
00122 
00123 #endif