[Bug SWING/17360] New: JScrollPane has incorrect size when JList with specified size is added to it

[Bug SWING/17360] New: JScrollPane has incorrect size when JList with specified size is added to it

[rodimina at redhat dot com]

1. Create a JList and set its preferred size
2. Create JScrollPane and add previously created JList to it.

JScrollPane's viewport should have the same size as JList.
However in our case, JScrollPane is set to the minimum size of the JList,
instead of its actual size.

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           Summary: JScrollPane has incorrect size when JList with specified
                    size is added to it
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: SWING
        AssignedTo: graydon at redhat dot com
        ReportedBy: rodimina at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug SWING/17360] JScrollPane has incorrect size when JList with specified size is added to it

[rodimina at redhat dot com]

------- Additional Comments From rodimina at redhat dot com  2004-09-08 21:28 -------
Created an attachment (id=7070)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7070&action=view)
Test program illustrating the bug


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug SWING/17360] JScrollPane has incorrect size when JList with specified size is added to it

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-12 04:13 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-12 04:13:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug SWING/17360] JScrollPane has incorrect size when JList with specified size is added to it

[abalkiss at redhat dot com]

------- Additional Comments From abalkiss at redhat dot com  2005-06-20 19:18 -------
Problem may be with layout managers instead of JScrollPane.  Run the test case
from Additional Comment #1 and try changing the JFrame's layout manager to
BoxLayout or GridLayout.  The problem no longer surfaces.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug swing/17360] JScrollPane has incorrect size when JList with specified size is added to it

[fitzsim at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|graydon at redhat dot com   |abalkiss at redhat dot com
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug swing/17360] JScrollPane has incorrect size when JList with specified size is added to it

[abalkiss at redhat dot com]

------- Comment #6 from abalkiss at redhat dot com  2005-10-26 19:15 -------
Created an attachment (id=10064)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10064&action=view)
patch


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug swing/17360] JScrollPane has incorrect size when JList with specified size is added to it

[abalkiss at redhat dot com]

------- Comment #7 from abalkiss at redhat dot com  2005-10-26 19:15 -------
Fixed, patch attached.


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abalkiss at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |0.19


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug swing/17360] JScrollPane has incorrect size when JList with specified size is added to it

[abalkiss at redhat dot com]

------- Comment #5 from abalkiss at redhat dot com  2005-10-26 17:00 -------
An even more specific test case shows that the problem is in ScrollPaneLayout's
preferredLayoutSize method.


***TESTCASE***
import java.awt.*;
import javax.swing.*;

class Test
{
  public static void main(String[] args)
  {
    String[] items = 
      {
        "Item1", "Item2", "Item3", "Item4", "Item5", "Item6",
        "Item7", "Item8", "Item9", "Item10", "Item11"
      };
    JList list = new JList(items);
    list.setPreferredSize(new Dimension(150, 150));
    JScrollPane scroller = new JScrollPane(list);
    System.out.println (scroller.getLayout().preferredLayoutSize(scroller));
  }
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360

[Bug swing/17360] JScrollPane has incorrect size when JList with specified size is added to it

[abalkiss at redhat dot com]

------- Comment #4 from abalkiss at redhat dot com  2005-10-26 15:23 -------
This appears to be a problem with JScrollPane.getPreferredSize(), as the
FlowLayout sets the size of the JScrollPane to its preferredSize, and then this
is a bound for the layout in ScrollPaneLayout which then sets an inappropriate
size for the JViewport.

The simple testcase below shows that JScrollPane is returning an inappropriate
value for getPreferredSize.


***TESTCASE***
import java.awt.*;
import javax.swing.*;

class Test2
{
  public static void main(String[] args)
  {
    JFrame f = new JFrame();
    String[] items = 
                     {
                       "Item1", "Item2", "Item3", "Item4", "Item5", "Item6",
                       "Item7", "Item8", "Item9", "Item10", "Item11"
                     };

    JList list = new JList(items);
    list.setPreferredSize(new Dimension(150, 150));
    f.setLayout(new FlowLayout());
    JScrollPane scroller = new JScrollPane(list);
    System.out.println ("scroll pane pref size: "+scroller.getPreferredSize());
  }


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17360