GuidelineProjectorConstantY Class Reference

Project a point along the horizontal direction in graph coordinates to produce a line segment along the constant-y direction, passing through a specified point. More...

#include <GuidelineProjectorConstantY.h>

Inheritance diagram for GuidelineProjectorConstantY:

Collaboration diagram for GuidelineProjectorConstantY:

Public Member Functions
	GuidelineProjectorConstantY ()
	Single constructor.
	~GuidelineProjectorConstantY ()
QLineF	fromCoordinateY (const Transformation &transformation, const QRectF &sceneRect, double yGraph)
	Return line through y in graph coordinates.
QLineF	fromPosScreen (const Transformation &transformation, const QRectF &sceneRect, const QPointF &posScreen)
	Return line through point in screen coordinates.
Public Member Functions inherited from GuidelineProjectorAbstract
	GuidelineProjectorAbstract ()
	Single constructor.
	~GuidelineProjectorAbstract ()

Additional Inherited Members
Protected Member Functions inherited from GuidelineProjectorAbstract
void	calculateCorners (const Transformation &transformation, const QRectF &sceneRect, QPointF &posGraphBL, QPointF &posGraphTL, QPointF &posGraphTR, QPointF &posGraphBR) const
	Conpute four corners of scene in graph coordinates.
bool	isOutside (const QRectF &sceneRect, const QPointF &posScreen) const
	Return true if point is outside of the scene.

Detailed Description

Project a point along the horizontal direction in graph coordinates to produce a line segment along the constant-y direction, passing through a specified point.

Definition at line 20 of file GuidelineProjectorConstantY.h.

Constructor & Destructor Documentation

GuidelineProjectorConstantY()

GuidelineProjectorConstantY::GuidelineProjectorConstantY

(

)

Single constructor.

Definition at line 13 of file GuidelineProjectorConstantY.cpp.

{
}

~GuidelineProjectorConstantY()

GuidelineProjectorConstantY::~GuidelineProjectorConstantY

(

)

Definition at line 17 of file GuidelineProjectorConstantY.cpp.

{
}

Member Function Documentation

fromCoordinateY()

QLineF GuidelineProjectorConstantY::fromCoordinateY	(	const Transformation &	transformation,
		const QRectF &	sceneRect,
		double	yGraph )

Return line through y in graph coordinates.

Definition at line 54 of file GuidelineProjectorConstantY.cpp.

{
  QLineF line (0, 0, 0, 0);
  QPointF posGraphBL, posGraphTL, posGraphTR, posGraphBR;
  calculateCorners (transformation,
                    sceneRect,
                    posGraphBL,
                    posGraphTL,
                    posGraphTR,
                    posGraphBR);
 
  // Intersections found on all the sides
  QList<QPointF> intersections;
 
  addSide (transformation, yGraph, posGraphBL, posGraphTL, intersections);
  addSide (transformation, yGraph, posGraphTL, posGraphTR, intersections);
  addSide (transformation, yGraph, posGraphTR, posGraphBR, intersections);
  addSide (transformation, yGraph, posGraphBR, posGraphBL, intersections);
 
  if (intersections.size() == 2) {
    line = QLineF (intersections.at (0),
                   intersections.at (1));
  }
 
  return line;
}

fromPosScreen()

QLineF GuidelineProjectorConstantY::fromPosScreen	(	const Transformation &	transformation,
		const QRectF &	sceneRect,
		const QPointF &	posScreen )

Return line through point in screen coordinates.

Definition at line 83 of file GuidelineProjectorConstantY.cpp.

{
  QPointF posGraph;
  transformation.transformScreenToRawGraph (posScreen,  posGraph);
 
  return fromCoordinateY (transformation,
                          sceneRect,
                          posGraph.y());
}

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

• Guideline/GuidelineProjectorConstantY.h
• Guideline/GuidelineProjectorConstantY.cpp