com.amitinside.e4.filebrowser.parts.FileBrowserPart.java Source code

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Here is the source code for com.amitinside.e4.filebrowser.parts.FileBrowserPart.java

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/*******************************************************************************
 * Copyright (C) 2015 - Amit Kumar Mondal <admin@amitinside.com>
 *
 * 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.amitinside.e4.filebrowser.parts;

import java.io.File;
import java.net.URL;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.e4.ui.di.Focus;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkUtil;

public class FileBrowserPart {
    private TreeViewer viewer;
    private Image image;

    @PostConstruct
    public void createControls(Composite parent) {
        createImage();
        viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
        viewer.setContentProvider(new ViewContentProvider());
        viewer.setLabelProvider(new ViewLabelProvider());
        viewer.setInput(File.listRoots());
    }

    private void createImage() {
        Bundle bundle = FrameworkUtil.getBundle(ViewLabelProvider.class);
        URL url = FileLocator.find(bundle, new Path("icons/folder.png"), null);
        ImageDescriptor imageDcr = ImageDescriptor.createFromURL(url);
        this.image = imageDcr.createImage();
    }

    class ViewContentProvider implements ITreeContentProvider {
        public void inputChanged(Viewer v, Object oldInput, Object newInput) {
        }

        @Override
        public void dispose() {
        }

        @Override
        public Object[] getElements(Object inputElement) {
            return (File[]) inputElement;
        }

        @Override
        public Object[] getChildren(Object parentElement) {
            File file = (File) parentElement;
            return file.listFiles();
        }

        @Override
        public Object getParent(Object element) {
            File file = (File) element;
            return file.getParentFile();
        }

        @Override
        public boolean hasChildren(Object element) {
            File file = (File) element;
            if (file.isDirectory()) {
                return true;
            }
            return false;
        }

    }

    class ViewLabelProvider extends LabelProvider {
        @Override
        public String getText(Object element) {
            File file = (File) element;
            String name = file.getName();
            return name.isEmpty() ? file.getPath() : name;
        }

        public Image getImage(Object element) {
            File file = (File) element;
            if (file.isDirectory()) {
                return image;
            }
            return null;
        }
    }

    @Focus
    public void setFocus() {
        viewer.getControl().setFocus();
    }

    @PreDestroy
    public void dispose() {
        image.dispose();
    }
}