/*
* Copyright 2008 IT Mill Ltd.
*
* 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.itmill.toolkit.demo;
import java.io.File;
import com.itmill.toolkit.data.util.FilesystemContainer;
import com.itmill.toolkit.data.util.FilesystemContainer.FileItem;
import com.itmill.toolkit.demo.util.SampleDirectory;
import com.itmill.toolkit.ui.ExpandLayout;
import com.itmill.toolkit.ui.Field;
import com.itmill.toolkit.ui.Label;
import com.itmill.toolkit.ui.Panel;
import com.itmill.toolkit.ui.Tree;
import com.itmill.toolkit.ui.Window;
import com.itmill.toolkit.ui.Component.Event;
import com.itmill.toolkit.ui.Component.Listener;
/**
* Browsable file explorer using Toolkit Tree component. Demonstrates: how to
* use <code>com.itmill.toolkit.ui.Component.Tree</code> datasource container,
* how to create <code>com.itmill.toolkit.data.util.FilesystemContainer</code>,
* how to read <code>com.itmill.toolkit.ui.Component.Event</code> objects, how
* to receive and handle any event by implementing
* <code>com.itmill.toolkit.ui.Component.Listener</code>.
*
* @since 4.0.0
*
*/
public class TreeFilesystemContainer extends com.itmill.toolkit.Application
implements Listener {
// Filesystem explorer panel and it's components
private final Panel explorerPanel = new Panel("Filesystem explorer");
private final Tree filesystem = new Tree();
// File properties panel and it's components
private final Panel propertyPanel = new Panel("File properties");
private final Label fileProperties = new Label();
public void init() {
final Window w = new Window("Tree FilesystemContainer demo");
setMainWindow(w);
final ExpandLayout main = new ExpandLayout();
w.setLayout(main);
main.setMargin(true);
main.setSpacing(true);
propertyPanel.setHeight(120);
main.addComponent(propertyPanel);
explorerPanel.setHeight(100);
explorerPanel.setHeightUnits(Panel.UNITS_PERCENTAGE);
main.addComponent(explorerPanel);
main.expand(explorerPanel);
// Explorer panel contains tree
explorerPanel.addComponent(filesystem);
// Property panel contains label
propertyPanel.addComponent(fileProperties);
fileProperties.setCaption("No file selected.");
propertyPanel.setEnabled(false);
// Get sample directory
final File sampleDir = SampleDirectory.getDirectory(this);
// Populate tree with FilesystemContainer
final FilesystemContainer fsc = new FilesystemContainer(sampleDir, true);
filesystem.setContainerDataSource(fsc);
// "this" handles all filesystem events
// e.g. node clicked, expanded etc.
filesystem.addListener(this);
// Value changes are immediate
filesystem.setImmediate(true);
}
/**
* Listener for any component events. This class has been registered as an
* listener for component fsTree.
*/
public void componentEvent(Event event) {
// Check if event occured at fsTree component
if (event.getSource() == filesystem) {
// Check if event is about changing value
if (event.getClass() == Field.ValueChangeEvent.class) {
// Update property panel contents
final FileItem fileItem = (FileItem) filesystem
.getItem(filesystem.getValue());
fileProperties.setIcon(fileItem.getIcon());
fileProperties.setCaption(fileItem.getName() + ", size "
+ fileItem.getSize() + " bytes.");
propertyPanel.setEnabled(true);
}
// here we could check for other type of events for filesystem
// component
}
// here we could check for other component's events
}
}
|