[2939] in java-interest
Components and containers
daemon@ATHENA.MIT.EDU (Ed Anuff)
Sat Oct 21 06:25:08 1995
Date: Wed, 18 Oct 1995 21:06:25 -0800
To: java-interest@java.sun.com
From: edanuff@protagonist.com (Ed Anuff)
Cc: java@java.sun.com
Like others on this list, I'm having a tough time with getting components
to lay out and resize correctly. I've included the source for an example
applet that I'm using to test this out. I would expect that the panel is
layed out at 100,100 and that the canvas would be positioned at 100,100
within the panel.
----------------------
|Applet |
| |
| |
| --------------|
| |Panel1 |
| | |
| | |
| | ------|
| | |\ | /|
| | | \|/ |
| | |--\--|
| | | /|\ |
| | |/ | \|
----------------------
When run, everything displays at 0,0 (in the applet viewer - in Netscape
nothing displays). My question is whether this is supposed to be the way
this works or if its a bug? If its a bug, is it planned to be fixed in the
next rev? BTW, I'm aware of the reasons why absolute placement is not a
good idea, but nothing in this example is platform dependent.
Ed
-Hierarchy.java start---------------------------
import java.util.*;
import java.applet.*;
import java.awt.*;
public class Hierarchy extends Applet {
Panel panel1;
TestCanvas theCanvas;
public void init() {
resize(400, 400);
setLayout(null);
panel1 = new Panel();
panel1.setLayout(null);
panel1.reshape(100,100,200,200);
add(panel1);
theCanvas = new TestCanvas();
theCanvas.reshape(100,100,100,100);
panel1.add(theCanvas);
panel1.move(100,100);
theCanvas.move(100,100);
repaint();
System.out.println(location().x + ", " + location().y + ",
" + size().width + ", " + size().height);
System.out.println(panel1.location().x + ", " +
panel1.location().y + ", " + panel1.size().width + ", " +
panel1.size().height);
System.out.println(theCanvas.location().x + ", " +
theCanvas.location().y + ", " + theCanvas.size().width + ", " +
theCanvas.size().height);
}
public void start() {
repaint();
System.out.println(location().x + ", " + location().y + ",
" + size().width + ", " + size().height);
System.out.println(panel1.location().x + ", " +
panel1.location().y + ", " + panel1.size().width + ", " +
panel1.size().height);
System.out.println(theCanvas.location().x + ", " +
theCanvas.location().y + ", " + theCanvas.size().width + ", " +
theCanvas.size().height);
}
}
class TestCanvas extends Canvas {
public TestCanvas() {
}
public void paint(Graphics g) {
Rectangle r = bounds();
g.drawRect(0, 0, r.width-1, r.height-1);
g.drawLine(0, 0, r.width, r.height);
g.drawLine(r.width, 0, 0, r.height);
g.drawLine(0, r.height / 2, r.width, r.height / 2);
g.drawLine(r.width / 2, 0, r.width / 2, r.height);
}
}
-Hierarchy.java end-----------------------------
Ed Anuff
Protagonist Interactive
edanuff@protagonist.com
http://www.protagonist.com/
-
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