QPainter is a C++ class that is part of the Qt library. It is a powerful tool for rendering graphics and provides many methods for drawing different shapes, lines, and texts. One of the methods provided by QPainter is drawLines(), which allows you to draw multiple connected lines at once.
The syntax for using the drawLines() function is:
void QPainter::drawLines(const QLineF *lines, int lineCount)
Here are some examples of using the drawLines() method:
Example 1: Basic usage
This example demonstrates how to draw a simple line using drawLines() method.
In this example, we create a QApplication and a window with size 250x150. We then create a QPainter object and set the pen to black with width 2. We create an array of 2 QPointF objects to define the start and end points of the line. Finally, we call the drawLines() method with the array of points and count of lines as arguments.
Example 2: Draw multiple lines
This example demonstrates how to draw multiple connected lines using the drawLines() method.
In this example, we create a QApplication and a window with size 250x150. We then create a QPainter object and set the pen to red with width 2. We create an array of 4 QPointF objects to define the start and end points of each line. Finally, we call the drawLines() method with the array of points and count of lines as arguments. This will draw a square with the lines connected at the corners.
It is a method provided by Qt library.
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