AThumbnailListPane.java

/*******************************************************************************
 * Copyright (c) 2016 Weasis Team and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Nicolas Roduit - initial API and implementation
 *******************************************************************************/
package org.weasis.base.explorer.list;

import java.awt.Dimension;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ExecutorService;

import javax.swing.JComponent;
import javax.swing.JRootPane;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingUtilities;
import javax.swing.event.ListSelectionEvent;

import org.weasis.base.explorer.JIExplorerContext;
import org.weasis.core.api.media.data.MediaElement;
import org.weasis.core.api.util.ThreadUtil;
import org.weasis.core.ui.editor.image.DefaultView2d;

@SuppressWarnings("serial")
public abstract class AThumbnailListPane<E extends MediaElement> extends JScrollPane implements IThumbnailListPane<E> {
    protected final IThumbnailList<E> thumbnailList;
    protected final ExecutorService pool;

    public AThumbnailListPane(IThumbnailList<E> thumbList) {
        super(thumbList.asComponent(), ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
            ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        this.pool = ThreadUtil.buildNewSingleThreadExecutor("Thumbnail List"); //$NON-NLS-1$

        this.thumbnailList = thumbList;
        this.thumbnailList.addListSelectionListener(new JIListSelectionAdapter());
        this.thumbnailList.registerListeners();

        this.setPreferredSize(new Dimension(200,200));
        this.setAutoscrolls(true);
    }

    @Override
    public void loadDirectory(Path dir) {
        JRootPane pane = getRootPane();
        Optional.ofNullable(pane).ifPresent(p -> p.setCursor(DefaultView2d.WAIT_CURSOR));
        this.pool.execute(() -> {
            AThumbnailListPane.this.thumbnailList.getThumbnailListModel().setData(dir);
            AThumbnailListPane.this.thumbnailList.setChanged();
            AThumbnailListPane.this.thumbnailList.clearChanged();
            Optional.ofNullable(pane).ifPresent(p -> p.setCursor(DefaultView2d.DEFAULT_CURSOR));
        });
    }

    final class JIListSelectionAdapter implements javax.swing.event.ListSelectionListener {

        JIListSelectionAdapter() {
        }

        @Override
        public void valueChanged(final ListSelectionEvent e) {
            final Thread runner = new Thread() {

                @Override
                public void run() {
                    SwingUtilities.invokeLater(() -> AThumbnailListPane.this.thumbnailList.listValueChanged(e));
                }
            };
            runner.start();
        }
    }

    public void notifyObservers() {
        this.thumbnailList.notifyObservers(null);
    }

    @Override
    public void notifyObservers(final Object arg) {
        this.thumbnailList.notifyObservers(arg);
    }

    @Override
    public boolean hasChanged() {
        return this.thumbnailList.hasChanged();
    }

    @Override
    public IThumbnailModel<E> getFileListModel() {
        return this.thumbnailList.getThumbnailListModel();
    }

    public JIExplorerContext getReloadContext() {
        return this.thumbnailList.getThumbnailListModel().getReloadContext();
    }

    public void setReloadContext(final JIExplorerContext reloadContext) {
        this.thumbnailList.getThumbnailListModel().setReloadContext(reloadContext);
    }

    public int[] getSelectedIndices() {
        return this.thumbnailList.getSelectedIndices();
    }

    public JComponent getRendererComponent() {
        final Object obj = this.thumbnailList.getCellRenderer();
        return (obj != null) && (obj instanceof JComponent) ? (JComponent) obj : null;
    }

    @Override
    public void loadDirectory(String pathname) {
        loadDirectory(Paths.get(pathname));
    }

    @Override
    public List<E> getSelectedValuesList() {
        return thumbnailList.getSelectedValuesList();
    }

    public IThumbnailList<E> getThumbnailList() {
        return thumbnailList;
    }
}