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QLine Class Reference
[com.trolltech.qt.gui module]

The QLine class provides a two-dimensional vector using integer precision. More...


Detailed Description

The QLine class provides a two-dimensional vector using integer precision.

A QLine describes a finite length line (or a line segment) on a two-dimensional surface. The start and end points of the line are specified using integer point accuracy for coordinates. Use the QLineF constructor to retrieve a floating point copy.

The positions of the line's start and end points can be retrieved using the p1, x1, y1, p2, x2, and y2 functions. The dx and dy functions return the horizontal and vertical components of the line. Use isNull to determine whether the QLine represents a valid line or a null line.

Finally, the line can be translated a given offset using the translate function.

See also QLineF, QPolygon, and QRect.


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Qt Jambi 4.3.2_01