// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.gwtexpui.globalkey.client;

import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.PopupPanel.PositionCallback;


public class ShowHelpCommand extends KeyCommand {
  public static final ShowHelpCommand INSTANCE = new ShowHelpCommand();

  public ShowHelpCommand() {
    super(0, '?', Util.C.showHelp());
  }

  @Override
  public void onKeyPress(final KeyPressEvent event) {
    final KeyHelpPopup help = new KeyHelpPopup();
    help.setPopupPositionAndShow(new PositionCallback() {
      @Override
      public void setPosition(final int pWidth, final int pHeight) {
        final int left = (Window.getClientWidth() - pWidth) >> 1;
        final int wLeft = Window.getScrollLeft();
        final int wTop = Window.getScrollTop();
        help.setPopupPosition(wLeft + left, wTop + 50);
      }
    });
  }
}

@@ -729,26 +729,187 @@
 gwt.
-user.client.Window
+event.logical.shared.CloseEvent;%0Aimport com.google.gwt.event.logical.shared.CloseHandler;%0Aimport com.google.gwt.user.client.Window;%0Aimport com.google.gwt.user.client.ui.PopupPanel
 ;%0Aim
@@ -1095,16 +1095,55 @@
 mmand();
+%0A  private static KeyHelpPopup current;
 %0A%0A  publ
@@ -1282,51 +1282,371 @@
     
-final KeyHelpPopup help = new KeyHelpPopup(
+if (current != null) %7B%0A      // Already open? Close the dialog.%0A      //%0A      current.hide();%0A      current = null;%0A      return;%0A    %7D%0A%0A    final KeyHelpPopup help = new KeyHelpPopup();%0A    help.addCloseHandler(new CloseHandler%3CPopupPanel%3E() %7B%0A      @Override%0A      public void onClose(final CloseEvent%3CPopupPanel%3E event) %7B%0A        current = null;%0A      %7D%0A    %7D
 );%0A 

Make '?' toggle the help dialog closed