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- package com.vaadin.tests;
-
- import java.io.File;
-
- import com.vaadin.server.VaadinSession;
- import com.vaadin.tests.util.SampleDirectory;
- import com.vaadin.ui.Component.Event;
- import com.vaadin.ui.Component.Listener;
- import com.vaadin.ui.Label;
- import com.vaadin.ui.LegacyWindow;
- import com.vaadin.ui.Panel;
- import com.vaadin.ui.VerticalLayout;
- import com.vaadin.v7.data.util.FilesystemContainer;
- import com.vaadin.v7.data.util.FilesystemContainer.FileItem;
- import com.vaadin.v7.ui.Field;
- import com.vaadin.v7.ui.Tree;
-
- /**
- * Browsable file explorer using Vaadin Tree component. Demonstrates: how to use
- * <code>com.vaadin.ui.Component.Tree</code> datasource container, how to create
- * <code>com.vaadin.data.util.FilesystemContainer</code>, how to read
- * <code>com.vaadin.ui.Component.Event</code> objects, how to receive and handle
- * any event by implementing <code>com.vaadin.ui.Component.Listener</code>.
- *
- * @since 4.0.0
- *
- */
- public class TreeFilesystemContainer extends com.vaadin.server.LegacyApplication
- 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();
-
- @Override
- public void init() {
- final LegacyWindow w = new LegacyWindow(
- "Tree FilesystemContainer demo");
- setMainWindow(w);
- final VerticalLayout main = new VerticalLayout();
- w.setContent(main);
- main.setMargin(true);
- main.setSpacing(true);
-
- propertyPanel.setHeight("120px");
- main.addComponent(propertyPanel);
- explorerPanel.setHeight("100%");
- main.addComponent(explorerPanel);
- main.setExpandRatio(explorerPanel, 1);
-
- // Explorer panel contains tree
- VerticalLayout explorerLayout = new VerticalLayout();
- explorerLayout.setMargin(true);
- explorerPanel.setContent(explorerLayout);
- explorerLayout.addComponent(filesystem);
-
- // Property panel contains label
- VerticalLayout propertyLayout = new VerticalLayout();
- propertyLayout.setMargin(true);
- propertyPanel.setContent(propertyLayout);
- propertyLayout.addComponent(fileProperties);
- fileProperties.setCaption("No file selected.");
- propertyPanel.setEnabled(false);
-
- // Get sample directory
- final File sampleDir = SampleDirectory
- .getDirectory(VaadinSession.getCurrent(), w);
- // 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.
- */
- @Override
- public void componentEvent(Event event) {
- // Check if event occurred 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
- }
-
- }
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