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QSImage Class Reference

Dataset: Draws pixmaps. More...

#include <qsimage.h>

Inheritance diagram for QSImage:

Inheritance graph
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 ()

Detailed Description

Dataset: Draws pixmaps.

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

Kamil Dobkowski

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.

Constructor & Destructor Documentation

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




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

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

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

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

The documentation for this class was generated from the following file:
Generated on Mon Mar 18 19:16:49 2002 for KMatplot library by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002