Basic HTML version of Foils prepared May 12 1996

Foil 107 Events in the java.awt -- Mouse, Keyboard Interaction - II

From CRPC Lectures on Java Language Applets Graphics CRPC Annual Meeting Tutorial -- May 14,1996. by Geoffrey C. Fox


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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