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// Copyright (C) 2008 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.gerrit.client.ui;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.user.client.ui.FocusWidget;
import com.google.gwt.user.client.ui.TextBoxBase;
/** Enables an action (e.g. a Button) if the text box is modified. */
public class TextSaveButtonListener implements KeyPressHandler {
private final FocusWidget descAction;
public TextSaveButtonListener(final FocusWidget action) {
descAction = action;
}
public TextSaveButtonListener(final TextBoxBase text, final FocusWidget action) {
this(action);
text.addKeyPressHandler(this);
}
@Override
public void onKeyPress(final KeyPressEvent e) {
if (descAction.isEnabled()) {
// Do nothing, its already enabled.
} else if (e.isControlKeyDown() || e.isAltKeyDown() || e.isMetaKeyDown()) {
switch (e.getCharCode()) {
case 'v':
case 'x':
on(e);
break;
}
} else {
switch (e.getCharCode()) {
case KeyCodes.KEY_UP:
case KeyCodes.KEY_DOWN:
case KeyCodes.KEY_LEFT:
case KeyCodes.KEY_RIGHT:
case KeyCodes.KEY_HOME:
case KeyCodes.KEY_END:
case KeyCodes.KEY_PAGEUP:
case KeyCodes.KEY_PAGEDOWN:
case KeyCodes.KEY_ALT:
case KeyCodes.KEY_CTRL:
case KeyCodes.KEY_SHIFT:
break;
default:
on(e);
break;
}
}
}
private void on(final KeyPressEvent e) {
descAction.setEnabled(((TextBoxBase) e.getSource()).isEnabled());
}
}
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