# HG changeset patch
# User Frank Benoit <benoit@tionex.de>
# Date 1207031524 -7200
# Node ID 7615869f89e603daa1c730fbaef3d44730200795
# Parent  f459f9147650eda5bbfccc4825228e33ad3c1633
ControlEnableState

diff -r f459f9147650 -r 7615869f89e6 dwtx/jface/dialogs/ControlEnableState.d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/dialogs/ControlEnableState.d	Tue Apr 01 08:32:04 2008 +0200
@@ -0,0 +1,161 @@
+/*******************************************************************************
+ * 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.dialogs.ControlEnableState;
+
+import tango.util.collection.ArraySeq;
+import tango.util.collection.model.Seq;
+
+import dwt.widgets.Composite;
+import dwt.widgets.Control;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Helper class to save the enable/disable state of a control including all its
+ * descendent controls.
+ */
+public class ControlEnableState {
+    /**
+     * List of exception controls (element type: <code>Control</code>);
+     * <code>null</code> if none.
+     */
+    private Seq!(Control) exceptions = null;
+
+    /**
+     * List of saved states (element type: <code>ItemState</code>).
+     */
+    private Seq!(Object) states;
+
+    /**
+     * Internal class for recording the enable/disable state of a single
+     * control.
+     */
+    private class ItemState {
+        /** the control */
+        protected Control item;
+
+        /** the state */
+        protected bool state;
+
+        /**
+         * Create a new instance of the receiver.
+         *
+         * @param item
+         * @param state
+         */
+        public this(Control item, bool state) {
+            this.item = item;
+            this.state = state;
+        }
+
+        /**
+         * Restore the enabled state to the original value.
+         *
+         */
+        public void restore() {
+            if (item is null || item.isDisposed()) {
+                return;
+            }
+            item.setEnabled(state);
+        }
+    }
+
+    /**
+     * Creates a new object and saves in it the current enable/disable state of
+     * the given control and its descendents; the controls that are saved are
+     * also disabled.
+     *
+     * @param w
+     *            the control
+     */
+    protected this(Control w) {
+        this(w, null);
+    }
+
+    /**
+     * Creates a new object and saves in it the current enable/disable state of
+     * the given control and its descendents except for the given list of
+     * exception cases; the controls that are saved are also disabled.
+     *
+     * @param w
+     *            the control
+     * @param exceptions
+     *            the list of controls to not disable (element type:
+     *            <code>Control</code>), or <code>null</code> if none
+     */
+    protected this(Control w, Seq!(Control) exceptions) {
+//         super();
+        states = new ArraySeq!(Object);
+        this.exceptions = exceptions;
+        readStateForAndDisable(w);
+    }
+
+    /**
+     * Saves the current enable/disable state of the given control and its
+     * descendents in the returned object; the controls are all disabled.
+     *
+     * @param w
+     *            the control
+     * @return an object capturing the enable/disable state
+     */
+    public static ControlEnableState disable(Control w) {
+        return new ControlEnableState(w);
+    }
+
+    /**
+     * Saves the current enable/disable state of the given control and its
+     * descendents in the returned object except for the given list of exception
+     * cases; the controls that are saved are also disabled.
+     *
+     * @param w
+     *            the control
+     * @param exceptions
+     *            the list of controls to not disable (element type:
+     *            <code>Control</code>)
+     * @return an object capturing the enable/disable state
+     */
+    public static ControlEnableState disable(Control w, Seq!(Control) exceptions) {
+        return new ControlEnableState(w, exceptions);
+    }
+
+    /**
+     * Recursively reads the enable/disable state for the given window and
+     * disables all controls.
+     * @param control Control
+     */
+    private void readStateForAndDisable(Control control) {
+        if ((exceptions !is null && exceptions.contains(control))) {
+            return;
+        }
+        if (auto c = cast(Composite)control ) {
+            Control[] children = c.getChildren();
+            for (int i = 0; i < children.length; i++) {
+                readStateForAndDisable(children[i]);
+            }
+        }
+        // XXX: Workaround for 1G2Q8SS: ITPUI:Linux - Combo box is not enabled
+        // in "File->New->Solution"
+        states.append(new ItemState(control, control.getEnabled()));
+        control.setEnabled(false);
+    }
+
+    /**
+     * Restores the window enable state saved in this object.
+     */
+    public void restore() {
+        int size = states.size();
+        for (int i = 0; i < size; i++) {
+            (cast(ItemState) states.get(i)).restore();
+        }
+    }
+}