CallbackBoundingRects Class Reference

Callback for computing the bounding rectangles of the screen and graph coordinates of the points in the Document. More...

#include <CallbackBoundingRects.h>

Collaboration diagram for CallbackBoundingRects:

Public Member Functions
	CallbackBoundingRects (DocumentAxesPointsRequired documentAxesPointsRequired, const Transformation &transformation)
	Single constructor. More...
QPointF	boundingRectGraphMin (bool &isEmpty) const
	Graph coordinate bounding rectangle's (xmin,ymin) corner. More...
QPointF	boundingRectGraphMax (bool &isEmpty) const
	Graph coordinate bounding rectangle's (xmax,ymax) corner. More...
QRectF	boundingRectScreen (bool &isEmpty) const
	Screen coordinate bounding rectangle. More...
CallbackSearchReturn	callback (const QString &curveName, const Point &point)
	Callback method. More...

Detailed Description

Callback for computing the bounding rectangles of the screen and graph coordinates of the points in the Document.

Definition at line 19 of file CallbackBoundingRects.h.

Constructor & Destructor Documentation

CallbackBoundingRects()

CallbackBoundingRects::CallbackBoundingRects	(	DocumentAxesPointsRequired	documentAxesPointsRequired,
		const Transformation &	transformation
	)

Single constructor.

Definition at line 15 of file CallbackBoundingRects.cpp.

                                                                                   :
  m_documentAxesPointsRequired (documentAxesPointsRequired),
  m_isEmptyGraphX (true),
  m_isEmptyGraphY (true),
  m_isEmptyScreenX (true),
  m_isEmptyScreenY (true),
  m_transformation (transformation)
{
}

Member Function Documentation

boundingRectGraphMax()

QPointF CallbackBoundingRects::boundingRectGraphMax

(

bool &

isEmpty

)

const

Graph coordinate bounding rectangle's (xmax,ymax) corner.

QRectF is not returned since it rounds off the smaller coordinates to zero when large dynamic ranges appear, and those zeros break the log scale algorithm

Definition at line 26 of file CallbackBoundingRects.cpp.

{
  // Need both X and Y before results are useful
  isEmpty = m_isEmptyGraphX || m_isEmptyGraphY;
 
  return m_boundingRectGraphMax;
}

boundingRectGraphMin()

QPointF CallbackBoundingRects::boundingRectGraphMin

(

bool &

isEmpty

)

const

Graph coordinate bounding rectangle's (xmin,ymin) corner.

QRectF is not returned since it rounds off the smaller coordinates to zero when large dynamic ranges appear, and those zeros break the log scale algorithm

Definition at line 34 of file CallbackBoundingRects.cpp.

{
  // Need both X and Y before results are useful
  isEmpty = m_isEmptyGraphX || m_isEmptyGraphY;
 
  return m_boundingRectGraphMin;
}

boundingRectScreen()

QRectF CallbackBoundingRects::boundingRectScreen

(

bool &

isEmpty

)

const

Screen coordinate bounding rectangle.

Definition at line 42 of file CallbackBoundingRects.cpp.

{
  // Need both X and Y before results are useful
  isEmpty = m_isEmptyScreenX || m_isEmptyScreenY;
 
  return QRectF (m_boundingRectScreenMin,
                 m_boundingRectScreenMax).normalized();
}

callback()

CallbackSearchReturn CallbackBoundingRects::callback	(	const QString &	curveName,
		const Point &	point
	)

Callback method.

Definition at line 51 of file CallbackBoundingRects.cpp.

{
  QPointF posGraph;
  bool haveGraphX = true,  haveGraphY = true;
  if (curveName == AXIS_CURVE_NAME) {
    posGraph = point.posGraph(); // Axis point has graph coordinates
 
    haveGraphX = (m_documentAxesPointsRequired != DOCUMENT_AXES_POINTS_REQUIRED_4) || point.isXOnly();
    haveGraphY = (m_documentAxesPointsRequired != DOCUMENT_AXES_POINTS_REQUIRED_4) || !point.isXOnly();
 
  } else {
    m_transformation.transformScreenToRawGraph (point.posScreen(),
                                                posGraph); // Curve point has undefined graph coordinates, but they can be calculated
  }
 
  if (haveGraphX) {
    mergeCoordinateX (posGraph,
                      m_boundingRectGraphMin,
                      m_boundingRectGraphMax,
                      m_isEmptyGraphX);
  }
  if (haveGraphY) {
    mergeCoordinateY (posGraph,
                      m_boundingRectGraphMin,
                      m_boundingRectGraphMax,
                      m_isEmptyGraphY);
  }
  mergeCoordinateX (point.posScreen(),
                    m_boundingRectScreenMin,
                    m_boundingRectScreenMax,
                    m_isEmptyScreenX);
  mergeCoordinateY (point.posScreen(),
                    m_boundingRectScreenMin,
                    m_boundingRectScreenMax,
                    m_isEmptyScreenY);
 
  return CALLBACK_SEARCH_RETURN_CONTINUE;
}

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

• Callback/CallbackBoundingRects.h
• Callback/CallbackBoundingRects.cpp