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126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPiecewisePointHandleItem.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkPiecewisePointHandleItem
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* @brief a vtkContextItem that draws handles
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* around a point of a piecewise function
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*
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*
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* This is a vtkContextItem that can be placed into a vtkContextScene. It draws
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* handles around a given point of a piecewise function so that the curve can
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* be adjusted using these handles.
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*/
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#ifndef vtkPiecewisePointHandleItem_h
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#define vtkPiecewisePointHandleItem_h
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#include "vtkChartsCoreModule.h" // For export macro
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#include "vtkContextItem.h"
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#include "vtkWeakPointer.h" // Needed for weak pointer to the PiecewiseFunction.
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class vtkContext2D;
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class vtkPiecewiseFunction;
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class vtkCallbackCommand;
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class vtkAbstractContextItem;
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class VTKCHARTSCORE_EXPORT vtkPiecewisePointHandleItem : public vtkContextItem
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{
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public:
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vtkTypeMacro(vtkPiecewisePointHandleItem, vtkContextItem);
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virtual void PrintSelf(ostream &os, vtkIndent indent);
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static vtkPiecewisePointHandleItem *New();
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static void CallRedraw(vtkObject* sender, unsigned long event, void* receiver, void* params);
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/**
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* Set the parent item, which should be a vtkControlPointItem
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*/
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virtual void SetParent(vtkAbstractContextItem *parent);
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/**
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* Paint event for the item.
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*/
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virtual bool Paint(vtkContext2D *painter);
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//@{
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/**
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* The current point id in the piecewise function being handled.
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*/
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vtkSetMacro(CurrentPointIndex, vtkIdType);
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vtkGetMacro(CurrentPointIndex, vtkIdType);
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//@}
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//@{
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/**
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* Set the PieceWiseFunction the handles will manipulate
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*/
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virtual void SetPiecewiseFunction(vtkPiecewiseFunction* piecewiseFunc);
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vtkWeakPointer<vtkPiecewiseFunction> GetPiecewiseFunction();
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//@}
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/**
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* Returns the index of the handle if pos is over any of the handles,
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* otherwise return -1;
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*/
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int IsOverHandle(float* pos);
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/**
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* Returns true if the supplied x, y coordinate is inside the item.
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*/
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virtual bool Hit(const vtkContextMouseEvent &mouse);
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/**
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* Mouse move event.
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*/
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virtual bool MouseMoveEvent(const vtkContextMouseEvent &mouse);
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/**
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* Mouse button down event.
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*/
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virtual bool MouseButtonPressEvent(const vtkContextMouseEvent &mouse);
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/**
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* Mouse button release event.
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*/
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virtual bool MouseButtonReleaseEvent(const vtkContextMouseEvent &mouse);
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protected:
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vtkPiecewisePointHandleItem();
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~vtkPiecewisePointHandleItem();
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/**
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* Redraw all the handles
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*/
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virtual void Redraw();
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int MouseOverHandleIndex;
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vtkIdType CurrentPointIndex;
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float HandleRadius;
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vtkWeakPointer<vtkPiecewiseFunction> PiecewiseFunction;
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vtkCallbackCommand* Callback;
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private:
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vtkPiecewisePointHandleItem(const vtkPiecewisePointHandleItem &) VTK_DELETE_FUNCTION;
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void operator=(const vtkPiecewisePointHandleItem &) VTK_DELETE_FUNCTION;
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class InternalPiecewisePointHandleInfo;
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InternalPiecewisePointHandleInfo* Internal;
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};
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#endif //vtkPiecewisePointHandleItem_h
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