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149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtk2DHistogramItem.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 vtk2DHistogramItem
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* @brief 2D histogram item.
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*
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*
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*
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*/
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#ifndef vtkPlotHistogram2D_h
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#define vtkPlotHistogram2D_h
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#include "vtkChartsCoreModule.h" // For export macro
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#include "vtkPlot.h"
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#include "vtkRect.h" // Needed for vtkRectf
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#include "vtkSmartPointer.h" // Needed for SP ivars
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class vtkImageData;
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class vtkScalarsToColors;
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class VTKCHARTSCORE_EXPORT vtkPlotHistogram2D : public vtkPlot
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{
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public:
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vtkTypeMacro(vtkPlotHistogram2D, vtkPlot);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Creates a new object.
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*/
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static vtkPlotHistogram2D* 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 item, called whenever it 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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* Set the input, we are expecting a vtkImageData with just one component,
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* this would normally be a float or a double. It will be passed to the other
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* functions as a double to generate a color.
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*/
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virtual void SetInputData(vtkImageData* data, vtkIdType z = 0);
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void SetInputData(vtkTable*) override {}
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void SetInputData(vtkTable*, const vtkStdString&, const vtkStdString&) override {}
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/**
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* Get the input table used by the plot.
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*/
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vtkImageData* GetInputImageData();
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/**
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* Set the color transfer function that will be used to generate the 2D
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* histogram.
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*/
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void SetTransferFunction(vtkScalarsToColors* transfer);
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/**
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* Get the color transfer function that is used to generate the histogram.
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*/
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vtkScalarsToColors* GetTransferFunction();
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void GetBounds(double bounds[4]) override;
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virtual void SetPosition(const vtkRectf& pos);
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virtual vtkRectf GetPosition();
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/**
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* Generate and return the tooltip label string for this plot
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* The segmentIndex parameter is ignored.
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* The member variable TooltipLabelFormat can be set as a
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* printf-style string to build custom tooltip labels from,
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* and may contain:
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* An empty string generates the default tooltip labels.
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* The following case-sensitive format tags (without quotes) are recognized:
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* '%x' The X position of the histogram cell
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* '%y' The Y position of the histogram cell
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* '%v' The scalar value of the histogram cell
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* Note: the %i and %j tags are valid only if there is a 1:1 correspondence
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* between individual histogram cells and axis tick marks
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* '%i' The X axis tick label for the histogram cell
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* '%j' The Y axis tick label for the histogram cell
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* Any other characters or unrecognized format tags are printed in the
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* tooltip label verbatim.
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*/
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vtkStdString GetTooltipLabel(
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const vtkVector2d& plotPos, vtkIdType seriesIndex, vtkIdType segmentIndex) override;
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/**
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* Function to query a plot for the nearest point to the specified coordinate.
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* Returns an index between 0 and (number of histogram cells - 1), or -1.
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* The index 0 is at cell x=0, y=0 of the histogram, and the index increases
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* in a minor fashon with x and in a major fashon with y.
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* The referent of "location" is set to the x and y integer indices of the
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* histogram cell.
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*/
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vtkIdType GetNearestPoint(const vtkVector2f& point, const vtkVector2f& tolerance,
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vtkVector2f* location,
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#ifndef VTK_LEGACY_REMOVE
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vtkIdType* segmentId) override;
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#else
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vtkIdType* segmentId = nullptr) override;
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#endif // VTK_LEGACY_REMOVE
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#ifndef VTK_LEGACY_REMOVE
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using vtkPlot::GetNearestPoint;
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#endif // VTK_LEGACY_REMOVE
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protected:
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vtkPlotHistogram2D();
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~vtkPlotHistogram2D() override;
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/**
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* Where all the magic happens...
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*/
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void GenerateHistogram();
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vtkSmartPointer<vtkImageData> Input;
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vtkSmartPointer<vtkImageData> Output;
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vtkSmartPointer<vtkScalarsToColors> TransferFunction;
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vtkRectf Position;
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private:
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vtkPlotHistogram2D(const vtkPlotHistogram2D&) = delete;
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void operator=(const vtkPlotHistogram2D&) = delete;
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};
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#endif // vtkPlotHistogram2D_h
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