--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/demo/share/jfc/SampleTree/SampleTreeCellRenderer.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Oracle nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This source code is provided to illustrate the usage of a given feature
+ * or technique and has been deliberately simplified. Additional steps
+ * required for a production-quality application, such as security checks,
+ * input validation and proper error handling, might not be present in
+ * this sample code.
+ */
+
+
+
+import javax.swing.Icon;
+import javax.swing.ImageIcon;
+import javax.swing.JLabel;
+import javax.swing.JTree;
+import javax.swing.tree.TreeCellRenderer;
+import javax.swing.tree.DefaultMutableTreeNode;
+import java.awt.Component;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics;
+import javax.swing.UIManager;
+
+
+@SuppressWarnings("serial")
+public class SampleTreeCellRenderer extends JLabel implements TreeCellRenderer {
+
+ /** Font used if the string to be displayed isn't a font. */
+ protected static Font defaultFont;
+ /** Icon to use when the item is collapsed. */
+ protected static ImageIcon collapsedIcon;
+ /** Icon to use when the item is expanded. */
+ protected static ImageIcon expandedIcon;
+ /** Color to use for the background when selected. */
+ protected static final Color SELECTED_BACKGROUND_COLOR;
+
+ static {
+ if ("Nimbus".equals(UIManager.getLookAndFeel().getName())) {
+ SELECTED_BACKGROUND_COLOR = new Color(0, 0,
+ 0, 0);
+ } else {
+ SELECTED_BACKGROUND_COLOR = Color.YELLOW;
+ }
+ try {
+ defaultFont = new Font("SansSerif", 0, 12);
+ } catch (Exception e) {
+ }
+ try {
+ collapsedIcon = new ImageIcon(SampleTreeCellRenderer.class.
+ getResource("/resources/images/collapsed.gif"));
+ expandedIcon = new ImageIcon(SampleTreeCellRenderer.class.
+ getResource("/resources/images/expanded.gif"));
+ } catch (Exception e) {
+ System.out.println("Couldn't load images: " + e);
+ }
+ }
+ /** Whether or not the item that was last configured is selected. */
+ protected boolean selected;
+
+ /**
+ * This is messaged from JTree whenever it needs to get the size
+ * of the component or it wants to draw it.
+ * This attempts to set the font based on value, which will be
+ * a TreeNode.
+ */
+ public Component getTreeCellRendererComponent(JTree tree, Object value,
+ boolean selected, boolean expanded,
+ boolean leaf, int row,
+ boolean hasFocus) {
+ String stringValue = tree.convertValueToText(value, selected,
+ expanded, leaf, row, hasFocus);
+
+ /* Set the text. */
+ setText(stringValue);
+ /* Tooltips used by the tree. */
+ setToolTipText(stringValue);
+
+ /* Set the image. */
+ if (expanded) {
+ setIcon(expandedIcon);
+ } else if (!leaf) {
+ setIcon(collapsedIcon);
+ } else {
+ setIcon(null);
+ }
+
+ /* Set the color and the font based on the SampleData userObject. */
+ SampleData userObject = (SampleData) ((DefaultMutableTreeNode) value).
+ getUserObject();
+ if (hasFocus) {
+ setForeground(UIManager.getColor("Tree.selectionForeground"));
+ } else {
+ setForeground(userObject.getColor());
+ }
+ if (userObject.getFont() == null) {
+ setFont(defaultFont);
+ } else {
+ setFont(userObject.getFont());
+ }
+
+ /* Update the selected flag for the next paint. */
+ this.selected = selected;
+
+ return this;
+ }
+
+ /**
+ * paint is subclassed to draw the background correctly. JLabel
+ * currently does not allow backgrounds other than white, and it
+ * will also fill behind the icon. Something that isn't desirable.
+ */
+ @Override
+ public void paint(Graphics g) {
+ Color bColor;
+ Icon currentI = getIcon();
+
+ if (selected) {
+ bColor = SELECTED_BACKGROUND_COLOR;
+ } else if (getParent() != null) /* Pick background color up from parent (which will come from
+ the JTree we're contained in). */ {
+ bColor = getParent().getBackground();
+ } else {
+ bColor = getBackground();
+ }
+ g.setColor(bColor);
+ if (currentI != null && getText() != null) {
+ int offset = (currentI.getIconWidth() + getIconTextGap());
+
+ if (getComponentOrientation().isLeftToRight()) {
+ g.fillRect(offset, 0, getWidth() - 1 - offset,
+ getHeight() - 1);
+ } else {
+ g.fillRect(0, 0, getWidth() - 1 - offset, getHeight() - 1);
+ }
+ } else {
+ g.fillRect(0, 0, getWidth() - 1, getHeight() - 1);
+ }
+ super.paint(g);
+ }
+}