/**
* Copyright 2010 Google Inc.
*
* 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.livingstories.client.ui;
import com.google.gwt.event.logical.shared.BeforeSelectionEvent;
import com.google.gwt.event.logical.shared.BeforeSelectionHandler;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.TabPanel;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.livingstories.client.ui.richtexttoolbar.RichTextToolbar;
/**
* A TabPanel that has tabs for editing the same content either in rich-text mode or in HTML mode.
* The rich text mode consists of a {@link RichTextToolbar} and a {@link RichTextArea}. The
* HTML mode just consists of a {@link TextArea}.
*/
public class RichTextEditor extends Composite {
private static final int EDITOR_WIDTH = 650;
private TabPanel tabPanel;
private TextArea textArea;
private RichTextArea richTextArea;
private VerticalPanel richTextVerticalPanel;
public RichTextEditor() {
super();
this.tabPanel = new TabPanel();
tabPanel.setWidth((EDITOR_WIDTH + 15) + "px");
createEditor();
initWidget(tabPanel);
}
private void createEditor() {
richTextVerticalPanel = new VerticalPanel();
populateRichTextVerticalPanel();
textArea = new TextArea();
textArea.setWidth(EDITOR_WIDTH + "px");
textArea.setVisibleLines(20);
tabPanel.add(richTextVerticalPanel, "Rich Text");
tabPanel.add(textArea, "HTML");
tabPanel.selectTab(0);
// When the tabs are switched, populate the edits in the content from the current tab to the
// other one.
tabPanel.getTabBar().addBeforeSelectionHandler(new BeforeSelectionHandler<Integer>() {
public void onBeforeSelection(BeforeSelectionEvent<Integer> event) {
if (event.getItem() == 0) {
// This is a workaround for some bugs in RichTextArea. It is necessary to create a new
// RichTextArea when selecting this tab because once the RichTextArea loses focus to the
// other TextArea, it does not get focus back. The cursor is lost and all the toggle
// buttons are depressed. See post on GWT-users titled "Weird behavior in RichTextArea"
// for details.
populateRichTextVerticalPanel();
richTextArea.setHTML(textArea.getText());
} else {
textArea.setText(richTextArea.getHTML());
}
}
});
}
/**
* Create a RichTextArea and a toolbar connected to it and add them to the VerticalPanel.
*/
private void populateRichTextVerticalPanel() {
richTextArea = new RichTextArea();
richTextArea.setSize(EDITOR_WIDTH + "px", "300px");
RichTextToolbar richTextToolbar = new RichTextToolbar(richTextArea);
richTextToolbar.setWidth(EDITOR_WIDTH + "px");
richTextVerticalPanel.clear();
richTextVerticalPanel.add(richTextToolbar);
richTextVerticalPanel.add(richTextArea);
}
public void setContent(String content) {
richTextArea.setHTML(content);
textArea.setText(content);
}
/**
* Return the HTML from the currently selected tab.
*/
public String getContent() {
if (tabPanel.getTabBar().getSelectedTab() == 1) {
return textArea.getText();
} else {
return richTextArea.getHTML();
}
}
@Override
public void setHeight(String height) {
textArea.setHeight(height);
richTextArea.setHeight(height);
}
}