# HG changeset patch
# User Frank Benoit <benoit@tionex.de>
# Date 1207247882 -7200
# Node ID 5802cda3813d3b0185746ac7545d6c972a9ceea1
# Parent  51d06982c55004c5a026cf11eb3b1f1ec6d0894a
TreeColumnLayout

diff -r 51d06982c550 -r 5802cda3813d dwtx/jface/layout/TreeColumnLayout.d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/layout/TreeColumnLayout.d	Thu Apr 03 20:38:02 2008 +0200
@@ -0,0 +1,123 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
+ *                                               - fix for bug 178280, 183999, 184609
+ *     IBM Corporation - API refactoring and general maintenance
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+
+module dwtx.jface.layout.TreeColumnLayout;
+
+import dwtx.jface.layout.AbstractColumnLayout;
+
+import dwt.events.TreeEvent;
+import dwt.events.TreeListener;
+import dwt.widgets.Composite;
+import dwt.widgets.Layout;
+import dwt.widgets.Scrollable;
+import dwt.widgets.Tree;
+import dwt.widgets.TreeColumn;
+import dwt.widgets.Widget;
+import dwtx.jface.viewers.ColumnLayoutData;
+import dwtx.jface.viewers.ColumnPixelData;
+
+import dwt.dwthelper.utils;
+import dwt.dwthelper.Runnable;
+
+/**
+ * The TreeColumnLayout is the {@link Layout} used to maintain {@link TreeColumn} sizes in a
+ * {@link Tree}.
+ *
+ * <p>
+ * <b>You can only add the {@link Layout} to a container whose <i>only</i>
+ * child is the {@link Tree} control you want the {@link Layout} applied to.
+ * Don't assign the layout directly the {@link Tree}</b>
+ * </p>
+ *
+ * @since 3.3
+ */
+public class TreeColumnLayout : AbstractColumnLayout {
+    private bool addListener = true;
+
+    private static class TreeLayoutListener : TreeListener {
+
+        public void treeCollapsed(TreeEvent e) {
+            update(cast(Tree) e.widget);
+        }
+
+        public void treeExpanded(TreeEvent e) {
+            update(cast(Tree) e.widget);
+        }
+
+        private void update(Tree tree) {
+            tree.getDisplay().asyncExec(new class Runnable {
+                Tree tree_;
+                this(){
+                    tree_=tree;
+                }
+                public void run() {
+                    tree_.update();
+                    tree_.getParent().layout();
+                }
+
+            });
+        }
+
+    }
+
+    private static const TreeLayoutListener listener;
+
+    static this(){
+        listener = new TreeLayoutListener();
+    }
+
+    protected void layout(Composite composite, bool flushCache) {
+        super.layout(composite, flushCache);
+        if( addListener ) {
+            addListener=false;
+            (cast(Tree)getControl(composite)).addTreeListener(listener);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.layout.AbstractColumnLayout#getColumnCount(dwt.widgets.Scrollable)
+     */
+    int getColumnCount(Scrollable tree) {
+        return (cast(Tree) tree).getColumnCount();
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.layout.AbstractColumnLayout#setColumnWidths(dwt.widgets.Scrollable, int[])
+     */
+    void setColumnWidths(Scrollable tree, int[] widths) {
+        TreeColumn[] columns = (cast(Tree) tree).getColumns();
+        for (int i = 0; i < widths.length; i++) {
+            columns[i].setWidth(widths[i]);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.layout.AbstractColumnLayout#getLayoutData(dwt.widgets.Scrollable, int)
+     */
+    ColumnLayoutData getLayoutData(Scrollable tableTree, int columnIndex) {
+        TreeColumn column = (cast(Tree) tableTree).getColumn(columnIndex);
+        return cast(ColumnLayoutData) column.getData(LAYOUT_DATA);
+    }
+
+    void updateColumnData(Widget column) {
+        TreeColumn tColumn = cast(TreeColumn) column;
+        Tree t = tColumn.getParent();
+
+        if( ! IS_GTK || t.getColumn(t.getColumnCount()-1) !is tColumn ){
+            tColumn.setData(LAYOUT_DATA,new ColumnPixelData(tColumn.getWidth()));
+            layout(t.getParent(), true);
+        }
+    }
+}