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109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkXYPlotWidget.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 vtkXYPlotWidget
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* @brief 2D widget for manipulating a XY plot
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*
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* This class provides support for interactively manipulating the position,
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* size, and orientation of a XY Plot. It listens to Left mouse events and
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* mouse movement. It will change the cursor shape based on its location. If
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* the cursor is over an edge of thea XY plot it will change the cursor shape
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* to a resize edge shape. If the position of a XY plot is moved to be close to
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* the center of one of the four edges of the viewport, then the XY plot will
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* change its orientation to align with that edge. This orientation is sticky
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* in that it will stay that orientation until the position is moved close to
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* another edge.
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*
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* @sa
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* vtkInteractorObserver
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*/
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#ifndef vtkXYPlotWidget_h
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#define vtkXYPlotWidget_h
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#include "vtkInteractionWidgetsModule.h" // For export macro
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#include "vtkInteractorObserver.h"
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class vtkXYPlotActor;
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class VTKINTERACTIONWIDGETS_EXPORT vtkXYPlotWidget : public vtkInteractorObserver
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{
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public:
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static vtkXYPlotWidget* New();
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vtkTypeMacro(vtkXYPlotWidget, vtkInteractorObserver);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Get the XY plot used by this Widget. One is created automatically.
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*/
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virtual void SetXYPlotActor(vtkXYPlotActor*);
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vtkGetObjectMacro(XYPlotActor, vtkXYPlotActor);
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//@}
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/**
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* Methods for turning the interactor observer on and off.
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*/
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void SetEnabled(int) override;
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protected:
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vtkXYPlotWidget();
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~vtkXYPlotWidget() override;
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// the actor that is used
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vtkXYPlotActor* XYPlotActor;
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// handles the events
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static void ProcessEvents(
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vtkObject* object, unsigned long event, void* clientdata, void* calldata);
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// ProcessEvents() dispatches to these methods.
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void OnLeftButtonDown();
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void OnLeftButtonUp();
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void OnMouseMove();
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// used to compute relative movements
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float StartPosition[2];
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// Manage the state of the widget
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int State;
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enum WidgetState
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{
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Moving = 0,
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AdjustingP1,
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AdjustingP2,
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AdjustingP3,
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AdjustingP4,
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AdjustingE1,
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AdjustingE2,
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AdjustingE3,
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AdjustingE4,
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Inside,
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Outside
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};
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// use to determine what state the mouse is over, edge1 p1, etc.
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// returns a state from the WidgetState enum above
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int ComputeStateBasedOnPosition(int X, int Y, int* pos1, int* pos2);
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// set the cursor to the correct shape based on State argument
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void SetCursor(int State);
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private:
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vtkXYPlotWidget(const vtkXYPlotWidget&) = delete;
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void operator=(const vtkXYPlotWidget&) = delete;
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};
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#endif
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