--- /dev/null
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+// Can be found at: https://code.google.com/archive/p/aephyr/source/default/source
+// package aephyr.swing;
+package be.nikiroo.utils.ui;
+
+import java.awt.*;
+import java.awt.event.*;
+
+import javax.swing.*;
+import javax.swing.tree.*;
+
+import java.util.*;
+
+public class TreeCellSpanner extends Container implements TreeCellRenderer, ComponentListener {
+
+ public TreeCellSpanner(JTree tree, TreeCellRenderer renderer) {
+ if (tree == null || renderer == null)
+ throw new NullPointerException();
+ this.tree = tree;
+ this.renderer = renderer;
+ treeParent = tree.getParent();
+ if (treeParent != null && treeParent instanceof JViewport) {
+ treeParent.addComponentListener(this);
+ } else {
+ treeParent = null;
+ tree.addComponentListener(this);
+ }
+ }
+
+ protected final JTree tree;
+
+ private TreeCellRenderer renderer;
+
+ private Component rendererComponent;
+
+ private Container treeParent;
+
+ private Map<TreePath,Integer> offsets = new HashMap<TreePath,Integer>();
+
+ private TreePath path;
+
+ public TreeCellRenderer getRenderer() {
+ return renderer;
+ }
+
+ @Override
+ public Component getTreeCellRendererComponent(JTree tree, Object value,
+ boolean selected, boolean expanded, boolean leaf, int row,
+ boolean hasFocus) {
+ path = tree.getPathForRow(row);
+ if (path != null && path.getLastPathComponent() != value)
+ path = null;
+ rendererComponent = renderer.getTreeCellRendererComponent(
+ tree, value, selected, expanded, leaf, row, hasFocus);
+ if (getComponentCount() < 1 || getComponent(0) != rendererComponent) {
+ removeAll();
+ add(rendererComponent);
+ }
+ return this;
+ }
+
+ @Override
+ public void doLayout() {
+ int x = getX();
+ if (x < 0)
+ return;
+ if (path != null) {
+ Integer offset = offsets.get(path);
+ if (offset == null || offset.intValue() != x) {
+ offsets.put(path, x);
+ fireTreePathChanged(path);
+ }
+ }
+ rendererComponent.setBounds(getX(), getY(), getWidth(), getHeight());
+ }
+
+ @Override
+ public void paint(Graphics g) {
+ if (rendererComponent != null)
+ rendererComponent.paint(g);
+ }
+
+ @Override
+ public Dimension getPreferredSize() {
+ Dimension s = rendererComponent.getPreferredSize();
+ // check if path count is greater than 1 to exclude the root
+ if (path != null && path.getPathCount() > 1) {
+ Integer offset = offsets.get(path);
+ if (offset != null) {
+ int width;
+ if (tree.getParent() == treeParent) {
+ width = treeParent.getWidth();
+ } else {
+ if (treeParent != null) {
+ treeParent.removeComponentListener(this);
+ tree.addComponentListener(this);
+ treeParent = null;
+ }
+ if (tree.getParent() instanceof JViewport) {
+ treeParent = tree.getParent();
+ tree.removeComponentListener(this);
+ treeParent.addComponentListener(this);
+ width = treeParent.getWidth();
+ } else {
+ width = tree.getWidth();
+ }
+ }
+ s.width = width - offset;
+ }
+ }
+ return s;
+ }
+
+
+ protected void fireTreePathChanged(TreePath path) {
+ if (path.getPathCount() > 1) {
+ // this cannot be used for the root node or else
+ // the entire tree will keep being revalidated ad infinitum
+ TreeModel model = tree.getModel();
+ Object node = path.getLastPathComponent();
+ if (node instanceof TreeNode && (model instanceof DefaultTreeModel
+ || (model instanceof TreeModelTransformer<?> &&
+ (model=((TreeModelTransformer<?>)model).getModel()) instanceof DefaultTreeModel))) {
+ ((DefaultTreeModel)model).nodeChanged((TreeNode)node);
+ } else {
+ model.valueForPathChanged(path, node.toString());
+ }
+ } else {
+ // root!
+
+ }
+ }
+
+
+ private int lastWidth;
+
+ @Override
+ public void componentHidden(ComponentEvent e) {}
+
+ @Override
+ public void componentMoved(ComponentEvent e) {}
+
+ @Override
+ public void componentResized(ComponentEvent e) {
+ if (e.getComponent().getWidth() != lastWidth) {
+ lastWidth = e.getComponent().getWidth();
+ for (int row=tree.getRowCount(); --row>=0;) {
+ fireTreePathChanged(tree.getPathForRow(row));
+ }
+ }
+ }
+
+ @Override
+ public void componentShown(ComponentEvent e) {}
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff