com.sap.dirigible.ide.registry.ui.RegistryView.java Source code

Introduction

Here is the source code for com.sap.dirigible.ide.registry.ui.RegistryView.java

Source

/*******************************************************************************
 * Copyright (c) 2014 SAP AG or an SAP affiliate company. All rights reserved.
 * 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.sap.dirigible.ide.registry.ui;

import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.ISelectionListener;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.ViewPart;

import com.sap.dirigible.ide.common.CommonParameters;
import com.sap.dirigible.ide.ui.widget.extbrowser.ExtendedBrowser;

public class RegistryView extends ViewPart {

    private static final String REFRESH = Messages.RegistryView_REFRESH;

    private static final URL DIRIGIBLE_REFRESH_ICON_URL = RegistryView.class.getResource("/resources/refresh.png"); //$NON-NLS-1$

    private final ISelectionListener selectionListener = new SelectionListenerImpl();

    private ExtendedBrowser browser = null;

    private final ResourceManager resourceManager;

    public RegistryView() {
        super();
        resourceManager = new LocalResourceManager(JFaceResources.getResources());
    }

    @Override
    public void init(IViewSite site) throws PartInitException {
        super.init(site);
        attachSelectionListener(site);
    }

    @Override
    public void createPartControl(Composite parent) {
        GridLayout layout = new GridLayout(1, false);
        parent.setLayout(layout);

        final Composite holder = new Composite(parent, SWT.NONE);
        holder.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
        holder.setLayout(new GridLayout(3, false));

        Button goButton = new Button(holder, SWT.PUSH);
        goButton.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false));
        goButton.setToolTipText(REFRESH);
        goButton.setImage(createImage(DIRIGIBLE_REFRESH_ICON_URL));
        goButton.addSelectionListener(new SelectionAdapter() {
            /**
             * 
             */
            private static final long serialVersionUID = 1316287800753595995L;

            public void widgetSelected(SelectionEvent e) {
                browser.refresh();
            }
        });

        browser = new ExtendedBrowser(parent, SWT.NONE);
        browser.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        browser.setUrl(CommonParameters.getRuntimeUrl());
    }

    @Override
    public void setFocus() {
        browser.setFocus();
    }

    @Override
    public void dispose() {
        detachSelectionListener(getSite());
        browser = null;
        super.dispose();
    }

    private void attachSelectionListener(IWorkbenchPartSite site) {
        if (site == null) {
            return;
        }
        final ISelectionService selectionService = getSelectionService(site);
        if (selectionService != null) {
            selectionService.addSelectionListener(selectionListener);
        }
    }

    private void detachSelectionListener(IWorkbenchPartSite site) {
        if (site == null) {
            return;
        }
        final ISelectionService selectionService = getSelectionService(site);
        if (selectionService != null) {
            selectionService.removeSelectionListener(selectionListener);
        }
    }

    private ISelectionService getSelectionService(IWorkbenchPartSite site) {
        final IWorkbenchWindow window = site.getWorkbenchWindow();
        if (window == null) {
            return null;
        }
        return window.getSelectionService();
    }

    private void handleElementSelected(Object element) {
        //
    }

    private class SelectionListenerImpl implements ISelectionListener {

        public void selectionChanged(IWorkbenchPart part, ISelection selection) {
            if (selection instanceof IStructuredSelection) {
                selectionChanged((IStructuredSelection) selection);
            }
        }

        private void selectionChanged(IStructuredSelection selection) {
            Object element = selection.getFirstElement();
            if (element != null) {
                handleElementSelected(element);
            }
        }

    }

    private Image createImage(URL imageURL) {
        ImageDescriptor imageDescriptor = ImageDescriptor.createFromURL(imageURL);
        return resourceManager.createImage(imageDescriptor);
    }

}