/**
* 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.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.livingstories.client.BaseContentItem;
import com.google.livingstories.client.ui.ContentItemSelector.SingleSelectionHandler;
/**
* Widget to display a single selection.
* Gives the user a 'select' button that pops up a ContentItemSelector. User clicks on
* the desired content item, and the selection is set and processed.
*/
public class SingleContentItemSelectionPanel extends Composite {
private Grid selectionPanel;
private ContentItemSelector contentItemSelector;
private Button clearButton;
private BaseContentItem selection;
public SingleContentItemSelectionPanel() {
contentItemSelector = new ContentItemSelector();
selectionPanel = new Grid(1, 2);
selectionPanel.setWidget(0, 1, createButtonPanel());
initWidget(selectionPanel);
setSelection(null);
}
public BaseContentItem getSelection() {
return selection;
}
public void setSelection(BaseContentItem selection) {
this.selection = selection;
if (selection == null) {
selectionPanel.setWidget(0, 0, new Label("No selection"));
clearButton.setEnabled(false);
} else {
selectionPanel.setWidget(0, 0, selection.renderTiny());
clearButton.setEnabled(true);
}
}
private Widget createButtonPanel() {
Button selectionButton = new Button("Select item");
selectionButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent e) {
contentItemSelector.show(new SingleSelectionHandler() {
@Override
public void onSelect(BaseContentItem contentItem) {
setSelection(contentItem);
}
});
}
});
clearButton = new Button("Clear selection");
clearButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent e) {
setSelection(null);
}
});
VerticalPanel buttonPanel = new VerticalPanel();
buttonPanel.add(selectionButton);
buttonPanel.add(clearButton);
return buttonPanel;
}
}