WrapLayout funktioniert nicht

[Lucaaa]

Hallo!
Ich habe für meine JScrollPane ein Panel mit einem WrapLayout, damit die Zeile umgebrochen wird.
Problem: Es klappt nicht!

package com.ludevstudio.passwordmanager;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.ScrollPane;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
public class ManagerPanel extends JPanel{
 // This Class contains the Manager
 JPanel panel;
 
 // Constructor and params
 public ManagerPanel() {
     add(gettScrollPane());
 
 } 
 
 public JScrollPane gettScrollPane() {
  JPanel panel = new JPanel();
  WrapLayout layout = new WrapLayout(WrapLayout.LEFT, 10, 10);
  layout.preferredLayoutSize(this);
  
  
  panel.setLayout(layout);
  panel.setMinimumSize(new Dimension(500, 100));
     ItemPanel[] items = new ItemPanel[10];
  for (int i = 0; i<items.length; i++) {
   items[i] = new ItemPanel();
   panel.add(items[i]);
}
  
  JScrollPane pane = new JScrollPane(panel,
    ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
    ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
  return pane;
 }
 
}

package com.ludevstudio.passwordmanager;
import java.awt.*;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class WrapLayout extends FlowLayout
{
  private Dimension preferredLayoutSize;

 public WrapLayout()
 {
  super();
 }

 public WrapLayout(int align)
 {
  super(align);
 }

 public WrapLayout(int align, int hgap, int vgap)
 {
  super(align, hgap, vgap);
 }

 @Override
 public Dimension preferredLayoutSize(Container target)
 {
  return layoutSize(target, true);
 }

 @Override
 public Dimension minimumLayoutSize(Container target)
 {
  Dimension minimum = layoutSize(target, false);
  minimum.width -= (getHgap() + 1);
  return minimum;
 }

 private Dimension layoutSize(Container target, boolean preferred)
 {
 synchronized (target.getTreeLock())
 {
  int targetWidth = target.getSize().width;

  if (targetWidth == 0)
   targetWidth = Integer.MAX_VALUE;

  int hgap = getHgap();
  int vgap = getVgap();
  Insets insets = target.getInsets();
  int horizontalInsetsAndGap = insets.left + insets.right + (hgap * 2);
  int maxWidth = targetWidth - horizontalInsetsAndGap;

  Dimension dim = new Dimension(0, 0);
  int rowWidth = 0;
  int rowHeight = 0;

  int nmembers = target.getComponentCount();

  for (int i = 0; i < nmembers; i++)
  {
   Component m = target.getComponent(i);

   if (m.isVisible())
   {
    Dimension d = preferred ? m.getPreferredSize() : m.getMinimumSize();

    if (rowWidth + d.width > maxWidth)
    {
     addRow(dim, rowWidth, rowHeight);
     rowWidth = 0;
     rowHeight = 0;
    }

    if (rowWidth != 0)
    {
     rowWidth += hgap;
    }

    rowWidth += d.width;
    rowHeight = Math.max(rowHeight, d.height);
   }
  }

  addRow(dim, rowWidth, rowHeight);

  dim.width += horizontalInsetsAndGap;
  dim.height += insets.top + insets.bottom + vgap * 2;

  Container scrollPane = SwingUtilities.getAncestorOfClass(JScrollPane.class, target);
  if (scrollPane != null)
  {
   dim.width -= (hgap + 1);
  }

  return dim;
 }
 }

 private void addRow(Dimension dim, int rowWidth, int rowHeight)
 {
  dim.width = Math.max(dim.width, rowWidth);

  if (dim.height > 0)
  {
   dim.height += getVgap();
  }

  dim.height += rowHeight;
 }
}

 

[mihe7]

Du packst Deine ScrollPane in ein Panel mit FlowLayout.