preview images wrapped + scrollpane

trunk/src/com/jpexs/decompiler/flash/gui/MainPanel.java

@@ -540,8 +540,8 @@ public final class MainPanel extends JPanel implements ActionListener, TreeSelec
 
     private JPanel createFolderPreviewCard() {
         JPanel folderPreviewCard = new JPanel(new BorderLayout());
-        folderPreviewPanel = new JPanel();
-        folderPreviewCard.add(folderPreviewPanel, BorderLayout.CENTER);
+        folderPreviewPanel = new JPanel(new WrapLayout(FlowLayout.LEFT));
+        folderPreviewCard.add(new JScrollPane(folderPreviewPanel), BorderLayout.CENTER);
 
         return folderPreviewCard;
     }

trunk/src/com/jpexs/decompiler/flash/gui/WrapLayout.java

@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2010-2014 JPEXS
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.jpexs.decompiler.flash.gui;
+
+/**
+ *
+ * @author JPEXS
+ */
+import java.awt.*;
+import javax.swing.JScrollPane;
+import javax.swing.SwingUtilities;
+
+/**
+ *  FlowLayout subclass that fully supports wrapping of components.
+ * 
+ *  Taken from: http://tips4java.wordpress.com/2008/11/06/wrap-layout/
+ */
+public class WrapLayout extends FlowLayout
+{
+	private Dimension preferredLayoutSize;
+
+	/**
+	* Constructs a new <code>WrapLayout</code> with a left
+	* alignment and a default 5-unit horizontal and vertical gap.
+	*/
+	public WrapLayout()
+	{
+		super();
+	}
+
+	/**
+	* Constructs a new <code>FlowLayout</code> with the specified
+	* alignment and a default 5-unit horizontal and vertical gap.
+	* The value of the alignment argument must be one of
+	* <code>WrapLayout</code>, <code>WrapLayout</code>,
+	* or <code>WrapLayout</code>.
+	* @param align the alignment value
+	*/
+	public WrapLayout(int align)
+	{
+		super(align);
+	}
+
+	/**
+	* Creates a new flow layout manager with the indicated alignment
+	* and the indicated horizontal and vertical gaps.
+	* <p>
+	* The value of the alignment argument must be one of
+	* <code>WrapLayout</code>, <code>WrapLayout</code>,
+	* or <code>WrapLayout</code>.
+	* @param align the alignment value
+	* @param hgap the horizontal gap between components
+	* @param vgap the vertical gap between components
+	*/
+	public WrapLayout(int align, int hgap, int vgap)
+	{
+		super(align, hgap, vgap);
+	}
+
+	/**
+	* Returns the preferred dimensions for this layout given the
+	* <i>visible</i> components in the specified target container.
+	* @param target the component which needs to be laid out
+	* @return the preferred dimensions to lay out the
+	* subcomponents of the specified container
+	*/
+	@Override
+	public Dimension preferredLayoutSize(Container target)
+	{
+		return layoutSize(target, true);
+	}
+
+	/**
+	* Returns the minimum dimensions needed to layout the <i>visible</i>
+	* components contained in the specified target container.
+	* @param target the component which needs to be laid out
+	* @return the minimum dimensions to lay out the
+	* subcomponents of the specified container
+	*/
+	@Override
+	public Dimension minimumLayoutSize(Container target)
+	{
+		Dimension minimum = layoutSize(target, false);
+		minimum.width -= (getHgap() + 1);
+		return minimum;
+	}
+
+	/**
+	* Returns the minimum or preferred dimension needed to layout the target
+	* container.
+	*
+	* @param target target to get layout size for
+	* @param preferred should preferred size be calculated
+	* @return the dimension to layout the target container
+	*/
+	private Dimension layoutSize(Container target, boolean preferred)
+	{
+	synchronized (target.getTreeLock())
+	{
+		//  Each row must fit with the width allocated to the containter.
+		//  When the container width = 0, the preferred width of the container
+		//  has not yet been calculated so lets ask for the maximum.
+
+		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;
+
+		//  Fit components into the allowed width
+
+		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();
+
+				//  Can't add the component to current row. Start a new row.
+
+				if (rowWidth + d.width > maxWidth)
+				{
+					addRow(dim, rowWidth, rowHeight);
+					rowWidth = 0;
+					rowHeight = 0;
+				}
+
+				//  Add a horizontal gap for all components after the first
+
+				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;
+
+		//	When using a scroll pane or the DecoratedLookAndFeel we need to
+		//  make sure the preferred size is less than the size of the
+		//  target containter so shrinking the container size works
+		//  correctly. Removing the horizontal gap is an easy way to do this.
+
+		Container scrollPane = SwingUtilities.getAncestorOfClass(JScrollPane.class, target);
+
+		if (scrollPane != null && target.isValid())
+		{
+			dim.width -= (hgap + 1);
+		}
+
+		return dim;
+	}
+	}
+
+	/*
+	 *  A new row has been completed. Use the dimensions of this row
+	 *  to update the preferred size for the container.
+	 *
+	 *  @param dim update the width and height when appropriate
+	 *  @param rowWidth the width of the row to add
+	 *  @param rowHeight the height of the row to add
+	 */
+	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;
+	}
+}
+