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QSDrvHitTest Class Reference

Implementation of QSDrv for testing which graph element is at the given position. More...

#include <qsdrvhittest.h>

Inheritance diagram for QSDrvHitTest:

[legend]List of all members.

Signals
void	hitDetected (int hitCategory, int hitElement)
Public Methods
	QSDrvHitTest (const QSPt2f &hitPosition, QObject *parent=NULL)
virtual	~QSDrvHitTest ()
virtual QSDrvHitTest *	copy ()
void	copySettingsFrom (const QSDrvHitTest *drv)
bool	isHit () const
int	hitCategory () const
int	hitElement () const
QSPt2f	hitPosition () const
virtual void	clearCanvas (const QSGFill &f, const QSPt2f &pos, const QSPt2f &size)
virtual void	drawLine (const QSPt2f &one, const QSPt2f &two)
virtual void	beginPolyline (const QSPt2f &pos)
virtual void	drawPolylineTo (const QSPt2f &pos)
virtual void	endPolyline ()
virtual QSPt2f	currPolylinePos ()
virtual void	drawRect (const QSPt2f &p1, const QSPt2f &p2)
virtual void	drawPoly (const QSPt2f pts[], int npoints, const bool edges[]=NULL, int edgeAutoColor=0)
virtual void	drawEllipse (const QSPt2f &p1, const QSPt2f &p2)
virtual void	drawText (const QSPt2f &pos, const QString &text, int align=AlignLeft|AlignBottom)
virtual void	drawRText (const QSPt2f &pos, int angle, const QString &text, int align=AlignLeft|AlignBottom)
virtual void	getPixmapBuffer (PixmapBuffer *buff, int pwidth, int pheight)
virtual void	drawPixmap (const QSPt2f &pos, PixmapBuffer *data)
virtual void	setFill (const QSGFill &f)
virtual void	setLine (const QSGLine &l)
Protected Methods
void	hit ()
Protected Attributes
QSPt2f	m_hit_pos
bool	m_is_hit
int	m_hit_category
int	m_hit_element
int	m_curr_pixmap_width
QSGFill	m_curr_fill
QSGLine	m_curr_line

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Detailed Description

Implementation of QSDrv for testing which graph element is at the given position.

Hit testing driver. To find out if an object was hit you must repaint it with QSHitDrv and next check if isHit() flag is set. QSHitDrv also emits signal hitDetected when isHit() flag is set and QSHitDrv is being deleted - so you can also use it when drawing in background. To find out what element was drawn, when hit was detected call hitCategory() and hitElement().

Author:

Kamil Dobkowski

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Member Function Documentation

virtual void QSDrvHitTest::beginPolyline (  const QSPt2f &    pos )  [virtual]

Starts to draw a polyline. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::clearCanvas (  const QSGFill &    f, const QSPt2f &    pos, const QSPt2f &    size )  [virtual]

Clear the canvas. Reimplemented from QSDrvQt.

virtual QSDrvHitTest* QSDrvHitTest::copy (    )  [virtual]

Returns a copy of this object. Reimplemented from QSDrvQt.

virtual QSPt2f QSDrvHitTest::currPolylinePos (    )  [inline, virtual]

Returns the current pen position. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawEllipse (  const QSPt2f &    p1, const QSPt2f &    p2 )  [virtual]

Draws a circle. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawLine (  const QSPt2f &    one, const QSPt2f &    two )  [virtual]

Draw a line. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawPixmap (  const QSPt2f &    pos, PixmapBuffer *    data )  [virtual]

Draw a pixmap. Notice that the pixmap buffer will be always the last requested one.'getPixmapBuffer' / 'drawPixmap' pair is always called together. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawPoly (  const QSPt2f    pts[], int    npoints, const bool    edges[] = NULL, int    edgeAutoColor = 0 )  [virtual]

Draw a polygon defined by 'npoints' points in 'pts'. Can change the current line ( if edgeAuto color != 0 ) Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawPolylineTo (  const QSPt2f &    pos )  [virtual]

Draw the next line segment. Wach out for setLine() call during drawPolyline2() Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawRect (  const QSPt2f &    p1, const QSPt2f &    p2 )  [virtual]

Draw a rectangle. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawRText (  const QSPt2f &    pos, int    angle, const QString &    text, int    align = AlignLeft|AlignBottom )  [virtual]

Draw a rotated text. This must be reimplemented. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::drawText (  const QSPt2f &    pos, const QString &    text, int    align = AlignLeft|AlignBottom )  [virtual]

Draw a text. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::endPolyline (    )  [virtual]

Ends polyline. Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::getPixmapBuffer (  PixmapBuffer *    buff, int    pwidth, int    pheight )  [virtual]

This method is always called before QSDrv::drawPixmap. The struct 'PixmapBuffer' must be filled with correct values. Pixmap width is requested to be equal to 'pwidth', pixmap height must be lower or equal to pheight ( see field 'lines' in 'PixmapBuffer' ). Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::setFill (  const QSGFill &    f )  [virtual]

Set the current fill . Reimplemented from QSDrvQt.

virtual void QSDrvHitTest::setLine (  const QSGLine &    l )  [virtual]

Set the current line style. Reimplemented from QSDrvQt.

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

• qsdrvhittest.h

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