--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/action/ControlContribution.d	Thu Apr 03 00:48:42 2008 +0200
@@ -0,0 +1,108 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.action.ControlContribution;
+
+import dwtx.jface.action.ContributionItem;
+
+import dwt.DWT;
+import dwt.widgets.Composite;
+import dwt.widgets.Control;
+import dwt.widgets.Menu;
+import dwt.widgets.ToolBar;
+import dwt.widgets.ToolItem;
+import dwtx.core.runtime.Assert;
+
+import dwt.dwthelper.utils;
+
+/**
+ * An abstract contribution item implementation for adding an arbitrary
+ * DWT control to a tool bar.
+ * Note, however, that these items cannot be contributed to menu bars.
+ * <p>
+ * The <code>createControl</code> framework method must be implemented
+ * by concrete subclasses.
+ * </p>
+ */
+public abstract class ControlContribution : ContributionItem {
+    /**
+     * Creates a control contribution item with the given id.
+     *
+     * @param id the contribution item id
+     */
+    protected this(String id) {
+        super(id);
+    }
+
+    /**
+     * Computes the width of the given control which is being added
+     * to a tool bar.  This is needed to determine the width of the tool bar item
+     * containing the given control.
+     * <p>
+     * The default implementation of this framework method returns
+     * <code>control.computeSize(DWT.DEFAULT, DWT.DEFAULT, true).x</code>.
+     * Subclasses may override if required.
+     * </p>
+     *
+     * @param control the control being added
+     * @return the width of the control
+     */
+    protected int computeWidth(Control control) {
+        return control.computeSize(DWT.DEFAULT, DWT.DEFAULT, true).x;
+    }
+
+    /**
+     * Creates and returns the control for this contribution item
+     * under the given parent composite.
+     * <p>
+     * This framework method must be implemented by concrete
+     * subclasses.
+     * </p>
+     *
+     * @param parent the parent composite
+     * @return the new control
+     */
+    protected abstract Control createControl(Composite parent);
+
+    /**
+     * The control item implementation of this <code>IContributionItem</code>
+     * method calls the <code>createControl</code> framework method.
+     * Subclasses must implement <code>createControl</code> rather than
+     * overriding this method.
+     */
+    public final void fill(Composite parent) {
+        createControl(parent);
+    }
+
+    /**
+     * The control item implementation of this <code>IContributionItem</code>
+     * method throws an exception since controls cannot be added to menus.
+     */
+    public final void fill(Menu parent, int index) {
+        Assert.isTrue(false, "Can't add a control to a menu");//$NON-NLS-1$
+    }
+
+    /**
+     * The control item implementation of this <code>IContributionItem</code>
+     * method calls the <code>createControl</code> framework method to
+     * create a control under the given parent, and then creates
+     * a new tool item to hold it.
+     * Subclasses must implement <code>createControl</code> rather than
+     * overriding this method.
+     */
+    public final void fill(ToolBar parent, int index) {
+        Control control = createControl(parent);
+        ToolItem ti = new ToolItem(parent, DWT.SEPARATOR, index);
+        ti.setControl(control);
+        ti.setWidth(computeWidth(control));
+    }
+}