BackgroundRenderer Class Reference

Shows a background image which is a color-coded data piece representation. More...

#include <BackgroundRenderer.h>

Inheritance diagram for BackgroundRenderer:

[legend]Collaboration diagram for BackgroundRenderer:

[legend]List of all members.

Public Member Functions
	BackgroundRenderer (const Data &aData)
virtual void	render (QPixmap *pixmap)
	Render data into a provided pixmap.
void	setDataIndex (int newIndex)
	index of additional data pieces
int	dataIndex ()
void	addTransferFunction (TransferFunc *aFunc)
	Adds a transfer function to use.
void	removeTransferFunction (TransferFunc *aFunc)
	Removes a transfer function from the renderer's list.
void	transferFunctionsChanged ()
	Must be called when the threshold of a transfer function changes.
Protected Member Functions
QColor	applyTransferFunctions (float aDataValue) const
	Passes a data value through all the transfer functions to produce a color value.
Protected Attributes
std::vector< TransferFunc * >	mFunctions
unsigned int	mDataIndex

---

Detailed Description

Shows a background image which is a color-coded data piece representation.

Set the desired data piece index using setDataIndex(). Colors are specified using transfer functions, between which they will be linearly interpolated.

---

Constructor & Destructor Documentation

BackgroundRenderer::BackgroundRenderer (  const Data &  aData  )

---

Member Function Documentation

void BackgroundRenderer::addTransferFunction (  TransferFunc *  aFunc  )

Adds a transfer function to use.

QColor BackgroundRenderer::applyTransferFunctions (  float  aDataValue  )  const [protected]

Passes a data value through all the transfer functions to produce a color value. If no functions exist, this function falls back to creating an opaque greyscale value.

int BackgroundRenderer::dataIndex (   )  [inline]

Returns: index of additional data pieces

void BackgroundRenderer::removeTransferFunction (  TransferFunc *  aFunc  )

Removes a transfer function from the renderer's list.

void BackgroundRenderer::render (  QPixmap *  pixmap  )  [virtual]

Render data into a provided pixmap. The size of the pixmap must be getImageSize(). Implements ARender.

void BackgroundRenderer::setDataIndex (  int  newIndex  )

index of additional data pieces

void BackgroundRenderer::transferFunctionsChanged (   )

Must be called when the threshold of a transfer function changes. This resorts our list of functions and sets the correct next and prev threshold values.

---

Member Data Documentation

unsigned int BackgroundRenderer::mDataIndex [protected]

std::vector<TransferFunc*> BackgroundRenderer::mFunctions [protected]

---

The documentation for this class was generated from the following files:

• backend/BackgroundRenderer.h
• backend/BackgroundRenderer.cpp

---