Overview of functionality

You should now have some understanding of Graphics View's architecture and transformation mechanics. We will now describe some easy-to-use functionality that you'll probably need when creating a Graphics View application.

Standard items

In order to effectively use the framework, you need to know what graphics item classes it provides. It's important to identify the classes you can use to construct the desirable picture and resort to creating a custom item class, only if there is no suitable item or you need better performance. Qt comes with the following standard items that make your life as a developer much easier:

Standard item	Description
QGraphicsLineItem	Draws a line. You can define the line with setLine(const QLineF&).
QGraphicsRectItem	Draws a rectangle. You can define the rectangle's geometry with setRect(const QRectF&).
QGraphicsEllipseItem	Draws an ellipse or an ellipse segment. You can define the rectangle within which the ellipse is being drawn with setRect...