| /**************************************************************** |
| * Licensed to the Apache Software Foundation (ASF) under one * |
| * or more contributor license agreements. See the NOTICE file * |
| * distributed with this work for additional information * |
| * regarding copyright ownership. The ASF licenses this file * |
| * to you 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 org.apache.hupa.widgets.ui; |
| |
| import org.apache.hupa.widgets.event.EditEvent; |
| import org.apache.hupa.widgets.event.EditHandler; |
| |
| import com.google.gwt.event.dom.client.BlurEvent; |
| import com.google.gwt.event.dom.client.BlurHandler; |
| import com.google.gwt.event.dom.client.KeyCodes; |
| import com.google.gwt.event.dom.client.KeyDownEvent; |
| import com.google.gwt.event.dom.client.KeyDownHandler; |
| import com.google.gwt.event.shared.HandlerManager; |
| import com.google.gwt.event.shared.HandlerRegistration; |
| import com.google.gwt.user.client.ui.HasText; |
| import com.google.gwt.user.client.ui.Label; |
| import com.google.gwt.user.client.ui.TextBox; |
| import com.google.gwt.user.client.ui.TreeItem; |
| import com.google.gwt.user.client.ui.Widget; |
| |
| /** |
| * TreeItem which supports editing |
| * |
| * |
| */ |
| public class EditableTreeItem extends TreeItem implements HasEditable,HasEditHandlers{ |
| protected TextBox editBox = new TextBox(); |
| protected String oldValue; |
| protected Widget normalItem = new Label(); |
| protected HandlerManager manager = new HandlerManager(this); |
| public EditableTreeItem() { |
| editBox.setWidth("100px"); |
| editBox.addKeyDownHandler(new KeyDownHandler() { |
| |
| public void onKeyDown(KeyDownEvent event) { |
| int code = event.getNativeKeyCode(); |
| switch (code) { |
| // handle ENTER and ESCAPE keys |
| case KeyCodes.KEY_ENTER: |
| stopEdit(); |
| break; |
| case KeyCodes.KEY_ESCAPE: |
| cancelEdit(); |
| break; |
| |
| default: |
| break; |
| } |
| |
| } |
| |
| }); |
| |
| // Just cancel the editing if the user click outside the TextBox |
| editBox.addBlurHandler(new BlurHandler() { |
| |
| public void onBlur(BlurEvent event) { |
| cancelEdit(); |
| } |
| |
| }); |
| super.setWidget(normalItem); |
| } |
| |
| |
| @Override |
| public void setText(String text) { |
| editBox.setText(text); |
| ((HasText)normalItem).setText(text); |
| } |
| |
| |
| @Override |
| public void setWidget(Widget newWidget) { |
| if (newWidget instanceof HasText) { |
| normalItem = newWidget; |
| super.setWidget(newWidget); |
| } else { |
| throw new IllegalArgumentException("Widget need to implement HasText"); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.hupa.client.widgets.HasEditable#cancelEdit() |
| */ |
| public void cancelEdit() { |
| showItem(oldValue); |
| manager.fireEvent(new EditEvent(EditEvent.EventType.Start,oldValue,null)); |
| } |
| /* |
| * (non-Javadoc) |
| * @see org.apache.hupa.client.widgets.HasEditable#isEdit() |
| */ |
| public boolean isEdit() { |
| return getWidget().equals(editBox); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.hupa.client.widgets.HasEditable#startEdit() |
| */ |
| public void startEdit() { |
| oldValue = getText(); |
| showEditBox(oldValue); |
| manager.fireEvent(new EditEvent(EditEvent.EventType.Start,oldValue,null)); |
| } |
| |
| /** |
| * Show the editbox filled with the given value |
| * |
| * @param value |
| */ |
| protected void showEditBox(String value) { |
| super.setWidget(editBox); |
| editBox.setText(value); |
| editBox.setCursorPos(value.length()); |
| editBox.setFocus(true); |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.hupa.client.widgets.HasEditable#stopEdit() |
| */ |
| public void stopEdit() { |
| showItem(editBox.getText()); |
| manager.fireEvent(new EditEvent(EditEvent.EventType.Stop,oldValue,editBox.getText())); |
| } |
| |
| /** |
| * Show the "normal" item with the given text |
| * |
| * @param text |
| */ |
| protected void showItem(String text) { |
| ((HasText)normalItem).setText(text); |
| setWidget(normalItem); |
| } |
| |
| @Override |
| public String getText() { |
| return ((HasText)normalItem).getText(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.hupa.client.widgets.HasEditHandlers#addEditHandler(org.apache.hupa.client.widgets.EditHandler) |
| */ |
| public HandlerRegistration addEditHandler(EditHandler handler) { |
| return manager.addHandler(EditEvent.TYPE, handler); |
| } |
| |
| |
| |
| } |