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QSImage Class Reference

Dataset: Draws pixmaps. More...

#include <qsimage.h>

Inheritance diagram for QSImage:

[legend]List of all members.

Public Types
enum	Channels {   XVector = 0, YVector = 1, DataRed = 2, DataIndex = 2,   DataGray = 2, DataGreen = 3, DataBlue = 4, Palette = 5 }
Public Methods
	QSImage (QSAxes *parent, const char *name=0)
	~QSImage ()
void	setRawMode (bool enabled)
bool	rawMode () const
void	setUseGradient (bool enable)
bool	useGradient () const
virtual QString	posInfo (QSPt2f &pos)
virtual bool	isClicked (const QSPt2f &pos)
virtual QSPt2f	legendItemSize (QSDrv *drv)
virtual void	drawLegendItem (const QSPt2f &pos, QSDrv *drv)
virtual void	loadStateFromStream (QDataStream &stream, QSObjectFactory *factory)
virtual void	saveStateToStream (QDataStream &stream, QSObjectFactory *factory)
virtual ColumnType	columnType (int channel, int column) const
virtual QString	channelVariable (int channel) const
Protected Methods
virtual void	dataChanged (int channel=-1)
virtual void	allocRuntimeData ()
virtual void	freeRuntimeData ()
virtual bool	getAxisRange (QSAxis *axis, double &min, double &max)
virtual bool	start ()
virtual bool	step ()
virtual void	end ()

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Detailed Description

Dataset: Draws pixmaps.

Data format is described in QSImage::Channels . See also QSAxes::plotAdd() .

Author:

Kamil Dobkowski

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Member Enumeration Documentation

enum QSImage::Channels

Descriptive names of data channels. See QSData::setMatrix(). DataRed is required, other matrices are optional. DataRed, DataIndex, DataGray are the different names for the same channel. DataRed, DataGreen, DataBlue must have the same size. XVector ( optional ) contains x coordinates of a grid, YVector ( optional ) contains y coordinates of a grid. cols(XVector) == cols(DataRed)+1, rows(YVector) == rows(DataRed)+1, both vectors must be monotone.

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Constructor & Destructor Documentation

QSImage::QSImage (  QSAxes *    parent, const char *    name = 0 )

Constructor.

QSImage::~QSImage (    )

Destructor.

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Member Function Documentation

virtual void QSImage::allocRuntimeData (    )  [protected, virtual]

Called from start(). Everyting which goes to start() may be put here. inits m_curr_driver, m_curr_dpi, m_csize, m_cpos fields with values taken from parent axes Reimplemented from QSPlot.

virtual QString QSImage::channelVariable (  int    channel )  const [virtual]

Returns a variable name ( 'x', 'y', 'z', 'v' etc ) for use in formulas. Reimplemented from QSData.

virtual ColumnType QSImage::columnType (  int    channel, int    column )  const [virtual]

Metadata - type of the given column. It should be reimplemented in derived classes. Used to create editors in sheet Reimplemented from QSData.

virtual void QSImage::dataChanged (  int    channel = -1 )  [protected, virtual]

This function is called after data has changed by 'setMatrix' method. You should also call it by hand, when you have changed the data in any matrix. It informs derived classes to mark old max and min data values as invalid, and informs them that they should repaint themselves. Default implementation calls dataChanging( this, channel ), Reimplemented from QSData.

virtual void QSImage::drawLegendItem (  const QSPt2f &    pos, QSDrv *    drv )  [virtual]

Draw legend item at position 'pos' Reimplemented from QSPlot.

virtual void QSImage::end (    )  [protected, virtual]

This can be called by parent axes to stop drawing. Normally called after 'step()' returned false; Reimplemented from QSPlot.

virtual void QSImage::freeRuntimeData (    )  [protected, virtual]

Called from end().Everyting which goes to end() may be put here. Reimplemented from QSPlot.

virtual bool QSImage::getAxisRange (  QSAxis *    axis, double &    min, double &    max )  [protected, virtual]

Must be reimplemented and return data range on each axis or false when no data is set. This functions is always called outside 'start()' and 'end()' ! Reimplemented from QSPlot.

virtual QSPt2f QSImage::legendItemSize (  QSDrv *    drv )  [virtual]

Returns item size Reimplemented from QSPlot.

virtual void QSImage::loadStateFromStream (  QDataStream &    stream, QSObjectFactory *    factory )  [virtual]

Restores all graphics atributes Reimplemented from QSPlot.

virtual QString QSImage::posInfo (  QSPt2f &    pos )  [virtual]

Returns info or QString::null Reimplemented from QSPlot.

bool QSImage::rawMode (    )  const [inline]

Returns the current state of the raw mode setting.

virtual void QSImage::saveStateToStream (  QDataStream &    stream, QSObjectFactory *    factory )  [virtual]

Saves all graphics attributes Reimplemented from QSPlot.

void QSImage::setRawMode (  bool    enabled )

Sets the raw mode. In the raw mode the value axis has fixed range 0-255, and there is no mapping of data values to the axis.

void QSImage::setUseGradient (  bool    enable )

Use gradient instead of gray levels

virtual bool QSImage::start (    )  [protected, virtual]

Start drawing. Called by parent axes. Time-expensive operations should be performed in little parts during 'step()' call. If returns false - 'end()' is called immediately, if returns true - 'step()' is called next. Reimplemented from QSPlot.

virtual bool QSImage::step (    )  [protected, virtual]

This function will be called to make drawing until it returns false. Notice that drawing should be stopped at any time. Even if this function returns true parent axes object may decide to call end(). Reimplemented from QSPlot.

bool QSImage::useGradient (    )  const [inline]

if using gradient

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

• qsimage.h

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