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OS/2 Shareware BBS: 18 REXX
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18-REXX.zip
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netrexx.zip
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NetRexx
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Scribble.nrx
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1998-02-10
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1KB
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36 lines
/* Scribble.nrx: the 'Scribble' applet, using an Adapter class */
class Scribble adapter binary -
extends Applet -
implements MouseListener, MouseMotionListener, ActionListener
last_x=int; last_y=int -- these record mouse coordinates
method init
addMouseListener(this) -- we want mouse events ..
addMouseMotionListener(this) -- .. and mouse movements
b=Button("Clear") -- make a button
b.addActionListener(this) -- we want to see the button's events
add(b) -- add the button to the applet
method mousePressed(m=mouseEvent)
last_x=m.getX; last_y=m.getY -- initialize mouse coordinates
method mouseDragged(m=mouseEvent)
g=this.getGraphics -- get applet's Graphics context
x=m.getX; y=m.getY -- get mouse coordinates
g.setColor(Color.black)
g.drawLine(last_x, last_y, x, y) -- draw new line segment
last_x=x; last_y=y -- save coordinates
method actionPerformed(a=ActionEvent) -- Button pressed
g=this.getGraphics
g.setColor(this.getBackground)
g.fillRect(0, 0, getSize.width, getSize.height) -- clear the window