ArrowMarker Class Reference

#include <ArrowMarker.h>

Inheritance diagram for ArrowMarker:

PlotEnrichement

List of all members.


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

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 (double x, double y)
 Sets the end point in axes values coordinates.
void setEndPoint (const QPoint &p)
 Sets the end point in pixel 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 (double x, double y)
 Sets the start point in axes values coordinates.
void setStartPoint (const QPoint &p)
 Sets the start point in pixel coordinates.
void setStyle (Qt::PenStyle s)
 Sets the pen style for the arrow line.
void setWidth (double 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.
double width ()
 The width of the arrow line.

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.

Member Enumeration Documentation

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]

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]

void ArrowMarker::drawEndArrow ( bool  on = true  )  [inline]

void ArrowMarker::drawStartArrow ( bool  on = true  )  [inline]

bool ArrowMarker::editable (  )  const [inline]

Returns the state of d_editable.

References d_editable.

QPoint ArrowMarker::endPoint (  )  const

QwtDoublePoint ArrowMarker::endPointCoord (  ) 

Axes values coordinates of the end point.

References d_rect.

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

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

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(), and CanvasPicker::eventFilter().

bool ArrowMarker::filledArrowHead (  )  [inline]

bool ArrowMarker::hasEndArrow (  )  [inline]

bool ArrowMarker::hasStartArrow (  )  [inline]

int ArrowMarker::headAngle (  )  [inline]

int ArrowMarker::headLength (  )  [inline]

double ArrowMarker::length (  ) 

Returns the length of the arrow line.

References d_rect.

QRect ArrowMarker::rect (  )  const [inline, virtual]

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  ) 

void ArrowMarker::setEditable ( bool  yes  ) 

Starts/ends editing of end points by the user.

References d_editable.

Referenced by Graph::deselectMarker(), CanvasPicker::disableEditing(), and CanvasPicker::selectMarker().

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

Sets the end point in axes values coordinates.

References d_end, and d_rect.

void ArrowMarker::setEndPoint ( const QPoint &  p  ) 

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 ImportOPJ::importGraphs().

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 ImportOPJ::importGraphs().

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

Sets the start point in axes values coordinates.

References d_rect, and d_start.

void ArrowMarker::setStartPoint ( const QPoint &  p  ) 

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

void ArrowMarker::setWidth ( double  w  ) 

QPoint ArrowMarker::startPoint (  )  const

QwtDoublePoint ArrowMarker::startPointCoord (  ) 

Axes values coordinates of the start point.

References d_rect.

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

Qt::PenStyle ArrowMarker::style (  )  [inline]

The pen style of the arrow line.

Referenced by Graph::addArrow(), 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.

double ArrowMarker::width (  )  [inline]


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().

Angle of the arrow head.

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

Length of the arrow head.

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

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().

QPoint ArrowMarker::d_start [private]

Pixel coordinates of the start point.

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

Flag specifying if the start arrow is visible.

Referenced by draw(), drawStartArrow(), and hasStartArrow().


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

Generated on Sun Jun 15 21:32:21 2008 for QtiPlot by  doxygen 1.5.6