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168 lines
3.9 KiB
C++
168 lines
3.9 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkChartPie.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 vtkChartPie
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* @brief Factory class for drawing pie charts
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*
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*
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* This class implements an pie chart.
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*/
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#ifndef vtkChartPie_h
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#define vtkChartPie_h
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#include "vtkChart.h"
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#include "vtkChartsCoreModule.h" // For export macro
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class vtkChartLegend;
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class vtkTooltipItem;
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class vtkChartPiePrivate;
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class VTKCHARTSCORE_EXPORT vtkChartPie : public vtkChart
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{
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public:
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vtkTypeMacro(vtkChartPie, vtkChart);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Creates a 2D Chart object.
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*/
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static vtkChartPie* New();
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/**
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* Perform any updates to the item that may be necessary before rendering.
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* The scene should take care of calling this on all items before their
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* Paint function is invoked.
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*/
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void Update() override;
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/**
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* Paint event for the chart, called whenever the chart needs to be drawn
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*/
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bool Paint(vtkContext2D* painter) override;
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/**
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* Add a plot to the chart.
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*/
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vtkPlot* AddPlot(int type) override;
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/**
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* Add a plot to the chart. Return the index of the plot, -1 if it failed.
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*/
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vtkIdType AddPlot(vtkPlot* plot) override { return Superclass::AddPlot(plot); }
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/**
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* Get the plot at the specified index, returns null if the index is invalid.
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*/
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vtkPlot* GetPlot(vtkIdType index) override;
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/**
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* Get the number of plots the chart contains.
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*/
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vtkIdType GetNumberOfPlots() override;
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/**
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* Set whether the chart should draw a legend.
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*/
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void SetShowLegend(bool visible) override;
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/**
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* Get the legend for the chart, if available. Can return nullptr if there is no
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* legend.
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*/
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vtkChartLegend* GetLegend() override;
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/**
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* Set the vtkContextScene for the item, always set for an item in a scene.
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*/
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void SetScene(vtkContextScene* scene) override;
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/**
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* Return true if the supplied x, y coordinate is inside the item.
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*/
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bool Hit(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse enter event.
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*/
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bool MouseEnterEvent(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse move event.
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*/
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bool MouseMoveEvent(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse leave event.
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*/
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bool MouseLeaveEvent(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse button down event
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*/
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bool MouseButtonPressEvent(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse button release event.
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*/
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bool MouseButtonReleaseEvent(const vtkContextMouseEvent& mouse) override;
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/**
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* Mouse wheel event, positive delta indicates forward movement of the wheel.
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*/
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bool MouseWheelEvent(const vtkContextMouseEvent& mouse, int delta) override;
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protected:
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vtkChartPie();
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~vtkChartPie() override;
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/**
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* Recalculate the necessary transforms.
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*/
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void RecalculatePlotTransforms();
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/**
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* The legend for the chart.
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*/
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vtkChartLegend* Legend;
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/**
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* The tooltip item for the chart - can be used to display extra information.
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*/
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vtkTooltipItem* Tooltip;
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/**
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* Does the plot area transform need to be recalculated?
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*/
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bool PlotTransformValid;
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private:
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vtkChartPie(const vtkChartPie&) = delete;
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void operator=(const vtkChartPie&) = delete;
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/**
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* Try to locate a point within the plots to display in a tooltip
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*/
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bool LocatePointInPlots(const vtkContextMouseEvent& mouse);
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/**
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* Private implementation details
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*/
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vtkChartPiePrivate* Private;
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};
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#endif // vtkChartPie_h
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