Allow editing of a field with a pulldown (combobox).

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3707 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/admin/client/PulldownFieldEditor.java

@@ -0,0 +1,142 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2005 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library 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 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library 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 library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.admin.client;
+
+import java.lang.reflect.Field;
+
+import javax.swing.JComboBox;
+
+import com.samskivert.util.ObjectUtil;
+
+import com.threerings.presents.dobj.DObject;
+import com.threerings.presents.util.PresentsContext;
+
+import com.threerings.admin.Log;
+
+/**
+ * Allows editing of a dobj field using a pulldown.
+ */
+public class PulldownFieldEditor extends FieldEditor
+{
+    /**
+     * An object that nicely represents a pulldown choice.
+     */
+    public static class Choice
+    {
+        /** The value we represent. */
+        public Object value;
+
+        /**
+         * Construct a pulldown choice.
+         */
+        public Choice (String displayName, Object value)
+        {
+            if (displayName == null) {
+                throw new NullPointerException("displayName cannot be null.");
+            }
+            _name = displayName;
+            this.value = value;
+        }
+
+        // documentation inherited
+        public String toString ()
+        {
+            return _name;
+        }
+
+        /** The string representation of this choice. */
+        protected String _name;
+    }
+
+    /**
+     * Construct a PulldownFieldEditor.
+     */
+    public PulldownFieldEditor (PresentsContext ctx, Field field, DObject obj)
+    {
+        super(ctx, field, obj);
+
+        add(_value = new JComboBox());
+    }
+
+    /**
+     * Add a PulldownChoice object as a choice for the pulldown.
+     */
+    public void addChoice (Choice choice)
+    {
+        _value.addItem(choice);
+    }
+
+    /**
+     * Add the specified object as a choice. The name will be the
+     * toString() of the object.
+     */
+    public void addChoice (Object choice)
+    {
+        String name = (choice == null) ? "null" : choice.toString();
+        addChoice(new Choice(name, choice));
+    }
+
+    // documentation inherited
+    public void addNotify ()
+    {
+        super.addNotify();
+        _value.addActionListener(this);
+    }
+
+    // documentation inherited
+    public void removeNotify ()
+    {
+        _value.removeActionListener(this);
+        super.removeNotify();
+    }
+
+    // documentation inherited
+    protected Object getDisplayValue ()
+        throws Exception
+    {
+        Object obj = _value.getSelectedItem();
+        if (obj == null) {
+            return null;
+        }
+        return ((Choice) obj).value;
+    }
+
+    // documentation inherited
+    protected void displayValue (Object value)
+    {
+        for (int ii = _value.getItemCount() - 1; ii >= 0; ii--) {
+            Choice choice = (Choice) _value.getItemAt(ii);
+            if (ObjectUtil.equals(value, choice.value)) {
+                _value.setSelectedIndex(ii);
+                return;
+            }
+        }
+
+        // cause shit to blow up minorly
+        Log.warning("Value in dobj is not settable, disabling choice.");
+        Thread.dumpStack();
+        _value.setEnabled(false);
+    }
+
+    /** Holds the value we're editing. */
+    protected JComboBox _value;
+}