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Bug
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Resolution: Unresolved
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P4
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None
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6
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x86
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solaris_10
FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment (build 1.6.0-rc-b95)
A DESCRIPTION OF THE PROBLEM :
When the tab of a JTabbedPane has a large height value and its placed on the Right or Left side the tabs will become hidden when more than one tab run is needed. This I believe is because the code in MetalTabbedPaneUI.getTabRunOverlay is returning a larger than "normal" value. Usually tab text is layed out horizontally, but if the text is embeded in html it can become vertical.
Code in question:
protected int getTabRunOverlay( int tabPlacement ) {
// Tab runs laid out vertically should overlap
// at least as much as the largest slant
if ( tabPlacement == LEFT || tabPlacement == RIGHT ) {
int maxTabHeight = calculateMaxTabHeight(tabPlacement);
return maxTabHeight / 2;
}
return 0;
}
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Run this test code
2) Add tabs until they go away. Remove the tabs until they reappear.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
that a 2nd or Nth column appears
ACTUAL -
columns are hidden
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JTabbedPaneBug implements Runnable{
String title = "<html><pre>A\nl\no\nn\ng\nt\nt\ni\nt\nl\ne\n</pre></html>";
public void run(){
create(JTabbedPane.LEFT, 0, 0);
create(JTabbedPane.RIGHT, 501, 0);
}
public void create(int placement, int x, int y){
final JTabbedPane jtp = new JTabbedPane();
jtp.setTabPlacement(placement);
for(int i = 0; i < 2; i ++)
jtp.add(title, new JLabel(String.valueOf(i)));
JFrame jf = new JFrame();
jf.add(jtp);
JButton jb = new JButton("Add");
jb.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jtp.add(title, new JLabel("New!"));
}
});
JButton jb2 = new JButton("Remove");
jb2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int count = jtp.getTabCount();
if(count != 0){
jtp.removeTabAt(0);
}
}
});
JPanel jp = new JPanel();
jp.add(jb); jp.add(jb2);
jf.add(jp, BorderLayout.SOUTH);
jf.setSize(500,500);
jf.setLocation(x, y);
jf.setVisible(true);
}
public static void main(String ... args){
SwingUtilities.invokeLater(new JTabbedPaneBug());
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
subclass MetalTabbedPaneUI and return a different value from getTabRunOverlay
Java(TM) SE Runtime Environment (build 1.6.0-rc-b95)
A DESCRIPTION OF THE PROBLEM :
When the tab of a JTabbedPane has a large height value and its placed on the Right or Left side the tabs will become hidden when more than one tab run is needed. This I believe is because the code in MetalTabbedPaneUI.getTabRunOverlay is returning a larger than "normal" value. Usually tab text is layed out horizontally, but if the text is embeded in html it can become vertical.
Code in question:
protected int getTabRunOverlay( int tabPlacement ) {
// Tab runs laid out vertically should overlap
// at least as much as the largest slant
if ( tabPlacement == LEFT || tabPlacement == RIGHT ) {
int maxTabHeight = calculateMaxTabHeight(tabPlacement);
return maxTabHeight / 2;
}
return 0;
}
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Run this test code
2) Add tabs until they go away. Remove the tabs until they reappear.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
that a 2nd or Nth column appears
ACTUAL -
columns are hidden
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JTabbedPaneBug implements Runnable{
String title = "<html><pre>A\nl\no\nn\ng\nt\nt\ni\nt\nl\ne\n</pre></html>";
public void run(){
create(JTabbedPane.LEFT, 0, 0);
create(JTabbedPane.RIGHT, 501, 0);
}
public void create(int placement, int x, int y){
final JTabbedPane jtp = new JTabbedPane();
jtp.setTabPlacement(placement);
for(int i = 0; i < 2; i ++)
jtp.add(title, new JLabel(String.valueOf(i)));
JFrame jf = new JFrame();
jf.add(jtp);
JButton jb = new JButton("Add");
jb.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jtp.add(title, new JLabel("New!"));
}
});
JButton jb2 = new JButton("Remove");
jb2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int count = jtp.getTabCount();
if(count != 0){
jtp.removeTabAt(0);
}
}
});
JPanel jp = new JPanel();
jp.add(jb); jp.add(jb2);
jf.add(jp, BorderLayout.SOUTH);
jf.setSize(500,500);
jf.setLocation(x, y);
jf.setVisible(true);
}
public static void main(String ... args){
SwingUtilities.invokeLater(new JTabbedPaneBug());
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
subclass MetalTabbedPaneUI and return a different value from getTabRunOverlay