plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/ServerPreferencePage.java

/*******************************************************************************
 * Copyright (c) 2003, 2016 IBM Corporation 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:
 *     IBM Corporation - Initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.server.ui.internal;


import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.help.IWorkbenchHelpSystem;
import org.eclipse.wst.server.core.internal.ServerPreferences;
import org.eclipse.wst.server.discovery.Discovery;
import org.eclipse.wst.server.ui.ICacheUpdateListener;
import org.eclipse.wst.server.ui.ServerUIUtil;
/**
 * The preference page that holds server properties.
 */
public class ServerPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {
	protected ServerPreferences preferences;
	protected ServerUIPreferences uiPreferences;

	protected Button showOnActivity;
	protected Button refreshNow;
	protected Text updateTime;
	protected Combo updateCacheFrequencyCombo;

	/**
	 * ServerPreferencesPage constructor comment.
	 */
	public ServerPreferencePage() {
		super();
	
		preferences = ServerPreferences.getInstance();
		uiPreferences = ServerUIPlugin.getPreferences();
	}
	
	/**
	 * Create the preference options.
	 *
	 * @param parent org.eclipse.swt.widgets.Composite
	 * @return org.eclipse.swt.widgets.Control
	 */
	protected Control createContents(Composite parent) {
		initializeDialogUnits(parent);
		IWorkbenchHelpSystem whs = PlatformUI.getWorkbench().getHelpSystem();
		whs.setHelp(parent, ContextIds.PREF_GENERAL);
		
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.horizontalSpacing = convertHorizontalDLUsToPixels(4);
		layout.verticalSpacing = convertVerticalDLUsToPixels(4);
		layout.marginWidth = 0;
		layout.marginHeight = 0;
		layout.numColumns = 3;
		composite.setLayout(layout);
		GridData data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
		composite.setLayoutData(data);
		
		showOnActivity = new Button(composite, SWT.CHECK);
		showOnActivity.setText(Messages.prefShowOnActivity);
		data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		data.horizontalSpan = 3;
		showOnActivity.setLayoutData(data);
		showOnActivity.setSelection(uiPreferences.getShowOnActivity());
		whs.setHelp(showOnActivity, ContextIds.PREF_GENERAL_SHOW_ON_ACTIVITY);
		
		Label label = new Label(composite, SWT.NONE);
		data = new GridData();
		data.horizontalSpan = 3;
		label.setLayoutData(data);
				
		Group cacheGroup = new Group(composite, SWT.NONE);
		cacheGroup.setText(Messages.cacheUpdate_boxTitle);
		layout = new GridLayout();
		layout.numColumns = 3;
		cacheGroup.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.horizontalSpan = 3;
		cacheGroup.setLayoutData(data);
		Label updateCacheLabel = new Label(cacheGroup, SWT.NONE);
		updateCacheLabel.setText(Messages.cacheUpdate_frequencyLabel);

		
		updateCacheFrequencyCombo = new Combo(cacheGroup, SWT.READ_ONLY);
		String[] frequency = new String[5];
		frequency[0] = Messages.cacheFrequency_manual;
		frequency[1] = Messages.cacheFrequency_daily;
		frequency[2] = Messages.cacheFrequency_weekly;
		frequency[3] = Messages.cacheFrequency_monthly;
		frequency[4] = Messages.cacheFrequency_quarterly;
		
		updateCacheFrequencyCombo.setItems(frequency);
			
		int cacheFrequency = uiPreferences.getCacheFrequency();
		updateCacheFrequencyCombo.select(cacheFrequency);
		
		refreshNow = new Button(cacheGroup, SWT.PUSH);
		data = new GridData(GridData.HORIZONTAL_ALIGN_END);
		refreshNow.setLayoutData(data);
		String refreshButtonText = ServerUIUtil.refreshButtonText;
		ServerUIUtil.setListener(new UpdateJobChangeListener());
		if (refreshButtonText.equals(Messages.cacheUpdate_refreshNow))
			refreshNow.setEnabled(true);
		else
			refreshNow.setEnabled(false);
		refreshNow.setText(refreshButtonText);
		
		refreshNow.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				refreshNow.setEnabled(false);
				updateRefreshText(Messages.cacheUpdate_refreshing);
				updateJob = ServerUIUtil.refreshServerNode(true);
			}
		});
		
		Label lastUpdatedLabel = new Label(cacheGroup, SWT.NONE);
		lastUpdatedLabel.setText(Messages.cacheUpdate_lastUpdatedOn);
		updateTime = new Text(cacheGroup, SWT.READ_ONLY);
		updateTime.setText(Discovery.getLastUpdatedDate());
		Dialog.applyDialogFont(composite);
		
		
		return composite;
	}
	Job updateJob = null;
	
	private class UpdateJobChangeListener implements ICacheUpdateListener {
		public UpdateJobChangeListener() {
		}
		public void start(){
			Display.getDefault().asyncExec(new Runnable() {
				public void run() {
					 if (refreshNow != null && !refreshNow.isDisposed()){
						 refreshNow.setText(Messages.cacheUpdate_refreshing);
						 refreshNow.setEnabled(false);
					 }
				}
			});
		}

		public void done() {
			Display.getDefault().asyncExec(new Runnable() {
				public void run() {
					 if (refreshNow != null && !refreshNow.isDisposed()){
						 refreshNow.setEnabled(true);
						 refreshNow.setText(Messages.cacheUpdate_refreshNow);
						 updateTime.setText(Discovery.getLastUpdatedDate());
					 }
				}
			});

		}

	}
	public void updateRefreshText(String refreshText){
		refreshNow.setText(refreshText);
	}

	/**
	 * Initializes this preference page using the passed workbench.
	 *
	 * @param workbench the current workbench
	 */
	public void init(IWorkbench workbench) {
		// do nothing
	}

	/**
	 * Performs special processing when this page's Defaults button has been pressed.
	 */
	protected void performDefaults() {
		showOnActivity.setSelection(uiPreferences.getDefaultShowOnActivity());
		updateCacheFrequencyCombo.select(/*Weekly*/2);
		
		super.performDefaults();
	}

	/**
	 * @see org.eclipse.jface.preference.IPreferencePage#performOk()
	 */
	public boolean performOk() {
		uiPreferences.setShowOnActivity(showOnActivity.getSelection());
		uiPreferences.setCacheFrequency(updateCacheFrequencyCombo.getSelectionIndex());
		return true;
	}
	
	public void dispose(){
		ServerUIUtil.setListener(null);
	}
}