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From: Robbo on 26 Mar 2010 18:22
Hello,

I have strange problem.
There is split pane in my application.
I added my own event listeners to both
touch buttons -- after that there are oryginal
listeners which do all work and my listeners
which enable or distable left button.
The purpose of my code was to be possible
to show/hide bottom panel and never hide
top panel.

But (I am not sure that it is only situation) when
I play fast with one touch buttons, sometimes
my listeners don't get event! Oryginal listeners
get event because they always show/hide panel,
but my listeners don't -- so sometimes one touch
buttons do nothing after click. Please, play for a moment
with these buttons and you will see.

Please, help me to solve this problem.

Regards,
Robbo

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.basic.*;

public class Swing5 {
public static void main(String[] args) {
new Swing5();
}

public Swing5() {
JFrame f = new JFrame("Swing5");
f.setSize(300, 100);
Container c = f.getContentPane();
c.setLayout(new BorderLayout());
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel p1 = new JPanel();
p1.setPreferredSize(new Dimension(300, 100));

JPanel p2 = new JPanel();
p2.setMinimumSize(new Dimension(0, 50));
p2.setMaximumSize(new Dimension(0, 50));
p2.setPreferredSize(new Dimension(300, 50));

JSplitPane sp1 = new JSplitPane();
sp1.setDividerSize(15);
sp1.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT);
sp1.setResizeWeight(1.0);
sp1.setOneTouchExpandable(true);
sp1.setTopComponent(p1);
sp1.setBottomComponent(p2);

sp1.setUI(new BasicSplitPaneUI() {
public BasicSplitPaneDivider createDefaultDivider() {
return new BasicSplitPaneDivider(this) {
boolean isSmallPanelOpened = true;

public void setBasicSplitPaneUI(BasicSplitPaneUI newUI)
{
super.setBasicSplitPaneUI(newUI);

splitPane.removePropertyChangeListener(this);
if (mouseHandler != null) {
splitPane.removeMouseListener(mouseHandler);
splitPane.removeMouseMotionListener(mouseHandler);
removeMouseListener(mouseHandler);
removeMouseMotionListener(mouseHandler);
}
setCursor(java.awt.Cursor.getPredefinedCursor(
java.awt.Cursor.DEFAULT_CURSOR));

if (leftButton.isEnabled() == false)
return;

leftButton.setEnabled(false);

leftButton.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
System.out.println("left");
if (!leftButton.isEnabled())
return;
leftButton.setEnabled(false);
}
});

rightButton.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
System.out.println("right");
leftButton.setEnabled(true);
}
});
}
};
}
});

c.add(sp1);
f.pack();
f.setVisible(true);
}
}


From: Robbo on 26 Mar 2010 20:10
Hm... this seems to work better:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.basic.*;

public class Swing5 {
public static void main(String[] args) {
new Swing5();
}

public Swing5() {
JFrame f = new JFrame("Swing5");
f.setSize(300, 100);
Container c = f.getContentPane();
c.setLayout(new BorderLayout());
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel p1 = new JPanel();
p1.setPreferredSize(new Dimension(300, 100));

JPanel p2 = new JPanel();
p2.setMinimumSize(new Dimension(0, 50));
p2.setMaximumSize(new Dimension(0, 50));
p2.setPreferredSize(new Dimension(300, 50));

JSplitPane sp1 = new JSplitPane();
sp1.setDividerSize(15);
sp1.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT);
sp1.setResizeWeight(1.0);
sp1.setOneTouchExpandable(true);
sp1.setTopComponent(p1);
sp1.setBottomComponent(p2);

sp1.setUI(new BasicSplitPaneUI() {
public BasicSplitPaneDivider createDefaultDivider() {
return new BasicSplitPaneDivider(this) {

public void setBasicSplitPaneUI(BasicSplitPaneUI newUI)
{
super.setBasicSplitPaneUI(newUI);

leftButton.setEnabled(false);

leftButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (!leftButton.isEnabled())
return;
leftButton.setEnabled(false);
}
});

rightButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
leftButton.setEnabled(true);
}
});

splitPane.removePropertyChangeListener(this);
if (mouseHandler != null) {
splitPane.removeMouseListener(mouseHandler);
splitPane.removeMouseMotionListener(mouseHandler);
removeMouseListener(mouseHandler);
removeMouseMotionListener(mouseHandler);
}
setCursor(java.awt.Cursor.getPredefinedCursor(
java.awt.Cursor.DEFAULT_CURSOR));
}
};
}
});

c.add(sp1);
f.pack();
f.setVisible(true);
}
}


From: Roedy Green on 29 Mar 2010 18:39
On Fri, 26 Mar 2010 23:22:06 +0100, "Robbo" <nie.mam(a)yle.com> wrote,
quoted or indirectly quoted someone who said :

>But (I am not sure that it is only situation) when
>I play fast with one touch buttons, sometimes
>my listeners don't get event!

Usually clogging the EDT thread is the problem. For an event to be
processed, the EDT thread must be unbusy enough to process the event
packets in the queue. Make sure you don't tie up the Event thread for
long periods of time. Consider putting anything time consuming on its
own thread. Consider splitting up long chunks on the EDT thread into
separate chunks so some even processing can be interleaved.

Make sure you never sleep on the EDT. Redesign your repaint logic so
that you don't repaint until all the changes are complete, and you
repaint only the clip regions that could have changed.

--
Roedy Green Canadian Mind Products
http://mindprod.com

If you tell a computer the same fact in more than one place, unless you have an automated mechanism to ensure they stay in sync, the versions of the fact will eventually get out of sync.
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