HELP! * GREY=local LOCAL HTML version of Foils prepared July 10 1996

Foil 156 Events in the java.awt -- Mouse, Keyboard Interaction - II

From Basic Lectures on Java Language Applets Graphics Networking Trip to China and Icase Tutorial -- July 12-28 and June 10-13 96. by Geoffrey C. Fox * See also color IMAGE

The Event class has various special class (static) variables defined including
Event.F1 -- the F1 key
Event.UP The Up arrow etc.
The Component class (grandparent of Applet) has a rich set of Event handlers which you should override if you wish to process particular input
public boolean mouseDown(Event evt, int x, int y) {
  • anchor = new Point(x,y); // record position of mouse click
  • return true; // must do this
}
Other handlers are mouseDrag, mouseEnter (enters current component), mouseExit, mouseMove (with its button up), keyUp, keyDown



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