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/*=========================================================================
Program: Visualization Toolkit
Module: vtkQtLabelRenderStrategy.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkQtLabelRenderStrategy - Renders labels with Qt
//
// .SECTION Description
// This class uses Qt to render labels and compute sizes. The labels are
// rendered to a QImage, then EndFrame() converts that image to a vtkImageData
// and textures the image onto a quad spanning the render area.
#ifndef vtkQtLabelRenderStrategy_h
#define vtkQtLabelRenderStrategy_h
#include "vtkRenderingQtModule.h" // For export macro
#include "vtkLabelRenderStrategy.h"
class vtkLabelSizeCalculator;
class vtkLabeledDataMapper;
class vtkPlaneSource;
class vtkPolyDataMapper2D;
class vtkQImageToImageSource;
class vtkTexture;
class vtkTexturedActor2D;
class vtkTextureMapToPlane;
class VTKRENDERINGQT_EXPORT vtkQtLabelRenderStrategy : public vtkLabelRenderStrategy
{
public:
void PrintSelf(ostream& os, vtkIndent indent);
vtkTypeMacro(vtkQtLabelRenderStrategy, vtkLabelRenderStrategy);
static vtkQtLabelRenderStrategy* New();
// Description:
// Compute the bounds of a label. Must be performed after the renderer is set.
virtual void ComputeLabelBounds(vtkTextProperty* tprop, vtkStdString label,
double bds[4])
{ this->Superclass::ComputeLabelBounds(tprop, label, bds); }
virtual void ComputeLabelBounds(vtkTextProperty* tprop, vtkUnicodeString label,
double bds[4]);
// Description:
// Render a label at a location in world coordinates.
// Must be performed between StartFrame() and EndFrame() calls.
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label)
{ this->Superclass::RenderLabel(x, tprop, label); }
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label,
int maxWidth)
{ this->Superclass::RenderLabel(x, tprop, label, maxWidth); }
virtual void RenderLabel(int x[2], vtkTextProperty* tprop,
vtkUnicodeString label);
virtual void RenderLabel(int x[2], vtkTextProperty* tprop,
vtkUnicodeString label, int maxWidth);
// Description:
// Start a rendering frame. Renderer must be set.
virtual void StartFrame();
// Description:
// End a rendering frame.
virtual void EndFrame();
// Description:
// Release any graphics resources that are being consumed by this strategy.
// The parameter window could be used to determine which graphic
// resources to release.
virtual void ReleaseGraphicsResources(vtkWindow *window);
protected:
vtkQtLabelRenderStrategy();
~vtkQtLabelRenderStrategy();
//BTX
class Internals;
Internals* Implementation;
//ETX
vtkQImageToImageSource* QImageToImage;
vtkPlaneSource* PlaneSource;
vtkTextureMapToPlane* TextureMapToPlane;
vtkTexture* Texture;
vtkPolyDataMapper2D* Mapper;
vtkTexturedActor2D* Actor;
bool AntialiasText; // Should the text be antialiased, inherited from render window.
private:
vtkQtLabelRenderStrategy(const vtkQtLabelRenderStrategy&); // Not implemented.
void operator=(const vtkQtLabelRenderStrategy&); // Not implemented.
};
#endif
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