Draws lines and arrows on a QwtPlot. More...

#include <ArrowMarker.h>

Inheritance diagram for ArrowMarker:

Public Types
enum	Operation { None, MoveStart, MoveEnd, MoveBoth }

Public Member Functions
	ArrowMarker ()
QwtDoubleRect	boundingRect () const
	Returns the bounding rectangle in plot coordinates.
QColor	color ()
double	dist (int x, int y)
	Returns the shortest distance to the arrow line or to one of the arrow heads.
void	drawEndArrow (bool on=true)
	Specifies weather the end arrow should be drawn.
void	drawStartArrow (bool on=true)
	Specifies weather the start arrow should be drawn.
bool	editable () const
	Returns the state of d_editable.
QPoint	endPoint () const
	Pixel coordinates of the end point.
QwtDoublePoint	endPointCoord ()
	Axes values coordinates of the end point.
bool	eventFilter (QObject o, QEvent e)
	Filters events for the canvas while d_editable is true.
void	fillArrowHead (bool fill=true)
	Specifies weather the arrow head should be filled with a brush.
bool	filledArrowHead ()
bool	hasEndArrow ()
bool	hasStartArrow ()
int	headAngle ()
	The angle of the arrow head.
int	headLength ()
	Length of the arrow head.
double	length ()
	Returns the length of the arrow line.
QRect	rect () const
	Returns the bounding rectangle in paint coordinates.
void	setBoundingRect (double xs, double ys, double xe, double ye)
	Set position (xValue() and yValue()), right and bottom values giving everything in plot coordinates.
void	setColor (const QColor &c)
void	setEditable (bool yes)
	Starts/ends editing of end points by the user.
void	setEndPoint (const QPoint &p)
	Sets the end point in pixel coordinates.
void	setEndPoint (double x, double y)
	Sets the end point in axes values coordinates.
void	setHeadAngle (int a)
	Sets the angle of the arrow head.
void	setHeadLength (int l)
	Sets the length of the arrow head.
void	setStartPoint (const QPoint &p)
	Sets the start point in pixel coordinates.
void	setStartPoint (double x, double y)
	Sets the start point in axes values coordinates.
void	setStyle (Qt::PenStyle s)
	Sets the pen style for the arrow line.
void	setWidth (int w)
	Sets the width of the arrow line.
QPoint	startPoint () const
	Pixel coordinates of the start point.
QwtDoublePoint	startPointCoord ()
	Axes values coordinates of the start point.
Qt::PenStyle	style ()
	The pen style of the arrow line.
void	updateBoundingRect ()
	Recalculates the bounding rectangle in values coordinates using the pixel coordinats when the scales change.
int	width ()
	The width of the arrow line.
Public Member Functions inherited from PlotEnrichement
double	bottom ()
QPoint	origin () const
	Return position in paint coordinates.
	PlotEnrichement ()
double	right ()
void	setOrigin (const QPoint &p)
	Set QwtPlotMarker::value() in paint coordinates.
virtual void	setRect (int x, int y, int w, int h)
	Set value (position) and d_size, giving everything in paint coordinates.
void	setSize (const QSize &size)
	Set d_size.
QSize	size ()
	Return d_size.

Private Member Functions
void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &r) const
double	theta (int xs, int ys, int xe, int ye) const

Private Attributes
bool	d_editable
	Whether start and end point can be moved by the user.
QPoint	d_end
	Pixel coordinates of the end point.
bool	d_end_arrow
	Flag specifying if the end arrow is visible.
bool	d_fill_head
	Flag specifying if the arrow head is filled with a brush.
int	d_head_angle
	Angle of the arrow head.
int	d_head_length
	Length of the arrow head.
Operation	d_op
	What editing operation is in progress.
QPoint	d_op_startat
	Difference between mouse position where a MoveBoth operation started and startPoint(). When only one point is being moved, we can simply setStartPoint() or setEndPoint() to the current mouse position, but when the editing starts in the middle of the line, we need to remember this bit.
QwtDoubleRect	d_rect
	Bounding rectangle of the arrow in axes values coordinates.
QPoint	d_start
	Pixel coordinates of the start point.
bool	d_start_arrow
	Flag specifying if the start arrow is visible.

Detailed Description

Draws lines and arrows on a QwtPlot.

Design Ideas

Move all the code for editing the end points from CanvasPicker here, so that we have it all in one place. This approach will make adding new editable markers (e.g. polygons) much easier, and it will allow this to be done in plug-ins.

See also:: ImageMarker, Legend

Member Enumeration Documentation

enum ArrowMarker::Operation

Enumerator:

None
MoveStart
MoveEnd
MoveBoth

Constructor & Destructor Documentation

ArrowMarker::ArrowMarker ( )

Member Function Documentation

QwtDoubleRect ArrowMarker::boundingRect ( ) const

virtual

Returns the bounding rectangle in plot coordinates.

Reimplemented from PlotEnrichement.

References d_rect.

QColor ArrowMarker::color ( )

inline

Referenced by Graph::addArrow(), ApplicationWindow::copyMarker(), LineDialog::LineDialog(), Graph::saveMarkers(), and setColor().

double ArrowMarker::dist	(	int	x,
		int	y
	)

Returns the shortest distance to the arrow line or to one of the arrow heads.

References d_rect.

Referenced by eventFilter(), and CanvasPicker::selectMarker().

void ArrowMarker::draw	(	QPainter *	p,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRect &	r
	)		const

private

References d_editable, d_end_arrow, d_fill_head, d_head_angle, d_head_length, d_rect, d_start_arrow, endPoint(), M_PI, startPoint(), and theta().

void ArrowMarker::drawEndArrow ( bool on = true )

inline

Specifies weather the end arrow should be drawn.

References d_end_arrow.

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), LineDialog::apply(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

void ArrowMarker::drawStartArrow ( bool on = true )

inline

Specifies weather the start arrow should be drawn.

References d_start_arrow.

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), LineDialog::apply(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

bool ArrowMarker::editable ( ) const

inline

Returns the state of d_editable.

References d_editable.

QPoint ArrowMarker::endPoint ( ) const

Pixel coordinates of the end point.

References d_rect.

Referenced by Graph::copyMarker(), LineDialog::displayCoordinates(), draw(), eventFilter(), SelectionMoveResizer::operateOnTargets(), and rect().

QwtDoublePoint ArrowMarker::endPointCoord ( )

Axes values coordinates of the end point.

References d_rect.

Referenced by Graph::addArrow(), LineDialog::displayCoordinates(), and Graph::saveMarkers().

bool ArrowMarker::eventFilter	(	QObject *	o,
		QEvent *	e
	)

Filters events for the canvas while d_editable is true.

References d_op, d_op_startat, dist(), endPoint(), headAngle(), headLength(), M_PI, MoveBoth, MoveEnd, MoveStart, None, setEndPoint(), setStartPoint(), startPoint(), and width().

Referenced by CanvasPicker::eventFilter().

void ArrowMarker::fillArrowHead ( bool fill = true )

Specifies weather the arrow head should be filled with a brush.

References d_fill_head.

Referenced by Graph::addArrow(), LineDialog::apply(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

bool ArrowMarker::filledArrowHead ( )

inline

References d_fill_head.

Referenced by Graph::addArrow(), LineDialog::apply(), ApplicationWindow::copyMarker(), LineDialog::LineDialog(), and Graph::saveMarkers().

bool ArrowMarker::hasEndArrow ( )

inline

References d_end_arrow.

Referenced by Graph::addArrow(), ApplicationWindow::copyMarker(), LineDialog::LineDialog(), and Graph::saveMarkers().

bool ArrowMarker::hasStartArrow ( )

inline

References d_start_arrow.

Referenced by Graph::addArrow(), ApplicationWindow::copyMarker(), LineDialog::LineDialog(), and Graph::saveMarkers().

int ArrowMarker::headAngle ( )

inline

The angle of the arrow head.

References d_head_angle.

Referenced by Graph::addArrow(), LineDialog::apply(), ApplicationWindow::copyMarker(), eventFilter(), LineDialog::LineDialog(), Graph::saveMarkers(), and CanvasPicker::selectMarker().

int ArrowMarker::headLength ( )

inline

Length of the arrow head.

References d_head_length.

Referenced by Graph::addArrow(), LineDialog::apply(), ApplicationWindow::copyMarker(), eventFilter(), LineDialog::LineDialog(), Graph::saveMarkers(), and CanvasPicker::selectMarker().

double ArrowMarker::length ( )

Returns the length of the arrow line.

References d_rect.

QRect ArrowMarker::rect ( ) const

inlinevirtual

Returns the bounding rectangle in paint coordinates.

Reimplemented from PlotEnrichement.

References endPoint(), and startPoint().

Referenced by SelectionMoveResizer::operateOnTargets().

void ArrowMarker::setBoundingRect	(	double	left,
		double	top,
		double	right,
		double	bottom
	)

virtual

Set position (xValue() and yValue()), right and bottom values giving everything in plot coordinates.

Reimplemented from PlotEnrichement.

References d_end, d_rect, and d_start.

Referenced by Graph::addArrow().

void ArrowMarker::setColor ( const QColor & c )

References color().

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), LineDialog::apply(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

void ArrowMarker::setEditable ( bool yes )

Starts/ends editing of end points by the user.

References d_editable.

Referenced by CanvasPicker::disableEditing(), CanvasPicker::eventFilter(), and CanvasPicker::selectMarker().

void ArrowMarker::setEndPoint ( const QPoint & p )

Sets the end point in pixel coordinates.

References d_end, and d_rect.

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), eventFilter(), SelectionMoveResizer::operateOnTargets(), Graph::pasteMarker(), and LineDialog::setCoordinates().

void ArrowMarker::setEndPoint	(	double	x,
		double	y
	)

Sets the end point in axes values coordinates.

References d_end, and d_rect.

void ArrowMarker::setHeadAngle ( int a )

Sets the angle of the arrow head.

References d_head_angle.

Referenced by Graph::addArrow(), LineDialog::apply(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

void ArrowMarker::setHeadLength ( int l )

Sets the length of the arrow head.

References d_head_length.

Referenced by Graph::addArrow(), LineDialog::apply(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

void ArrowMarker::setStartPoint ( const QPoint & p )

Sets the start point in pixel coordinates.

References d_rect, and d_start.

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), eventFilter(), SelectionMoveResizer::operateOnTargets(), Graph::pasteMarker(), and LineDialog::setCoordinates().

void ArrowMarker::setStartPoint	(	double	x,
		double	y
	)

Sets the start point in axes values coordinates.

References d_rect, and d_start.

void ArrowMarker::setStyle ( Qt::PenStyle s )

Sets the pen style for the arrow line.

References style().

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), LineDialog::apply(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

void ArrowMarker::setWidth ( int w )

Sets the width of the arrow line.

References width().

Referenced by Graph::addArrow(), LineProfileTool::addLineMarker(), LineDialog::apply(), CanvasPicker::drawLineMarker(), CanvasPicker::eventFilter(), and Graph::pasteMarker().

QPoint ArrowMarker::startPoint ( ) const

Pixel coordinates of the start point.

References d_rect.

Referenced by Graph::copyMarker(), LineDialog::displayCoordinates(), draw(), eventFilter(), SelectionMoveResizer::operateOnTargets(), and rect().

QwtDoublePoint ArrowMarker::startPointCoord ( )

Axes values coordinates of the start point.

References d_rect.

Referenced by Graph::addArrow(), LineDialog::displayCoordinates(), and Graph::saveMarkers().

Qt::PenStyle ArrowMarker::style ( )

inline

The pen style of the arrow line.

Referenced by Graph::addArrow(), ApplicationWindow::copyMarker(), LineDialog::LineDialog(), Graph::saveMarkers(), and setStyle().

double ArrowMarker::theta	(	int	xs,
		int	ys,
		int	xe,
		int	ye
	)		const

private

Referenced by draw().

void ArrowMarker::updateBoundingRect ( )

virtual

Recalculates the bounding rectangle in values coordinates using the pixel coordinats when the scales change.

Reimplemented from PlotEnrichement.

References d_end, d_rect, and d_start.

Referenced by Graph::updateMarkersBoundingRect().

int ArrowMarker::width ( )

inline

The width of the arrow line.

Referenced by Graph::addArrow(), ApplicationWindow::copyMarker(), eventFilter(), LineDialog::LineDialog(), Graph::saveMarkers(), CanvasPicker::selectMarker(), and setWidth().

Member Data Documentation

bool ArrowMarker::d_editable

private

Whether start and end point can be moved by the user.

Referenced by draw(), editable(), and setEditable().

QPoint ArrowMarker::d_end

private

Pixel coordinates of the end point.

Referenced by setBoundingRect(), setEndPoint(), and updateBoundingRect().

bool ArrowMarker::d_end_arrow

private

Flag specifying if the end arrow is visible.

Referenced by draw(), drawEndArrow(), and hasEndArrow().

bool ArrowMarker::d_fill_head

private

Flag specifying if the arrow head is filled with a brush.

Referenced by draw(), fillArrowHead(), and filledArrowHead().

int ArrowMarker::d_head_angle

private

Angle of the arrow head.

Referenced by draw(), headAngle(), and setHeadAngle().

int ArrowMarker::d_head_length

private

Length of the arrow head.

Referenced by draw(), headLength(), and setHeadLength().

Operation ArrowMarker::d_op

private

What editing operation is in progress.

Referenced by eventFilter().

QPoint ArrowMarker::d_op_startat

private

Difference between mouse position where a MoveBoth operation started and startPoint(). When only one point is being moved, we can simply setStartPoint() or setEndPoint() to the current mouse position, but when the editing starts in the middle of the line, we need to remember this bit.

Referenced by eventFilter().

QwtDoubleRect ArrowMarker::d_rect

private

Bounding rectangle of the arrow in axes values coordinates.

Referenced by boundingRect(), dist(), draw(), endPoint(), endPointCoord(), length(), setBoundingRect(), setEndPoint(), setStartPoint(), startPoint(), startPointCoord(), and updateBoundingRect().