This tutorial shows how to use "arc" connectors.
SelfPTarget is used to find target sites.
This tutorial demonstrates how to use composite figures.
This tutorial shows how to use Connectors.
SitedRectangle is a class that provides four sites that we use in the examples to attach connectors to.
SRTarget is used to find a useful site on a SitedRectangle.
An example showing how to make figures draggable with interactors.
An example showing how to make custom figures.
CustomRectangle is a class that paints itself as a rectangle and draw a red plus sign over the top of itself.
This tutorial illustrates how to use Icons.
This tutorial illustrates how to use LabelFigure and related classes.
This tutorial shows how to add different types of manipulators to figures.
This tutorial shows how to construct a JCanvas and place figures on it.
This tutorial illustrates how to use Terminals.
This tutorial shows how to make custom figures that contain their own TransformContext.
CloudFigure is a class that paints itself as a translucent "cloud."
An example showing how to use VectorFigure.
All of the tutorials show some common code in the constructor that creates an instance of JCanvas and places it into a frame. The code is:
canvas = new JCanvas(); graphicsPane = (GraphicsPane)canvas.getCanvasPane(); BasicFrame frame = new BasicFrame("Simple canvas tutorial", canvas); frame.setSize(600,400); frame.setVisible(true);
(Where canvas and graphicsPane are private variables of the class.) Every JCanvas contains a top-level canvas pane, which in turn contains layers. By default, the top-level pane is an instance of GraphicsPane. BasicFrame is part of the diva.gui package and contains the JCanvas in its content pane.
To run a particular tutorial, simply move to the diva/canvas/tutorial directory and type:
make FigureTutorial(where FigureTutorial is replaced by the class you want to run). A Java window will appear where you can see and manipulate the figures.
For a slightly larger example, see the package diva.canvas.demo.