AbstractCoordinateSystem

Base class of all worksheet coordinate systems.

Public Types

• enum MappingFlag

Public Methods

void	AbstractCoordinateSystem(AbstractPlot *)
bool	clipLineToRect(QLineF *line, const QRectF &rect, LineClipResult *clipResult=nullptr)
QString	info() const
bool	isValid() const =0
Points	mapLogicalToScene(const Points &, MappingFlags flags=MappingFlag::DefaultMapping) const =0
QPointF	mapLogicalToScene(QPointF, bool &visible, MappingFlags flags=MappingFlag::DefaultMapping) const =0
Lines	mapLogicalToScene(const Lines &, MappingFlags flags=MappingFlag::DefaultMapping) const =0
Points	mapSceneToLogical(const Points &, MappingFlags flags=MappingFlag::DefaultMapping) const =0
QPointF	mapSceneToLogical(QPointF, MappingFlags flags=MappingFlag::DefaultMapping) const =0
QString	name() const
void	setName(const QString &)

Detailed Description

class AbstractCoordinateSystem

Base class of all worksheet coordinate systems.

Subclassed by CartesianCoordinateSystem

Public Static Functions

static bool clipLineToRect(QLineF *line, const QRectF &rect, LineClipResult *clipResult = nullptr)

Line clipping using the Cohen-Sutherland algorithm.

This is a modified version of clipLine() from Qt 4.5’s qpaintengine_x11.cpp.

Parameters:

• line – The line to clip.

• rect – The rect to clip to.

• clipResult – Pointer to an object describing which parts where clipped (may be NULL).

Returns:

false if line is completely outside, otherwise true

class LineClipResult