47 if ( mRatio.width() > 0 && mRatio.height() > 0 )
49 const double width = std::fabs( p.
x() - mStartPoint.
x() );
50 double height = width * ( mRatio.width() / mRatio.height() );
51 if ( p.
y() - mStartPoint.
y() < 0 )
53 p.
setY( mStartPoint.
y() + height );
57 calculateEndPoint( mEndPoint );
64 mEndPoint = mStartPoint;
76 calculateEndPoint( mEndPoint );
86 if ( mStartPoint.
x() != mEndPoint.
x() && mStartPoint.
y() != mEndPoint.
y() )
101void QgsMapToolExtent::calculateEndPoint(
QgsPointXY &point )
103 if ( mRatio.width() > 0 && mRatio.height() > 0 )
105 const double width = std::fabs( point.
x() - mStartPoint.
x() );
106 double height = width * mRatio.height() / mRatio.width();
107 if ( point.
y() - mStartPoint.
y() < 0 )
109 point.
setY( mStartPoint.
y() + height );
113void QgsMapToolExtent::drawExtent()
void reset(T *p=nullptr)
Will reset the managed pointer to p.
Map canvas is a class for displaying all GIS data types on a canvas.
A QgsMapMouseEvent is the result of a user interaction with the mouse on a QgsMapCanvas.
A class to represent a 2D point.
void setY(double y)
Sets the y value of the point.
A rectangle specified with double values.
A class for drawing transient features (e.g.
void reset(Qgis::GeometryType geometryType=Qgis::GeometryType::Line)
Clears all the geometries in this rubberband.
void addPoint(const QgsPointXY &p, bool doUpdate=true, int geometryIndex=0, int ringIndex=0)
Adds a vertex to the rubberband and update canvas.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)