| /******************************************************************************* |
| * Copyright (c) 2013 EclipseSource 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: |
| * EclipseSource - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.rap.rwt.application; |
| |
| import static org.eclipse.rap.rwt.internal.service.ContextProvider.getApplicationContext; |
| |
| import org.eclipse.rap.rwt.internal.lifecycle.RWTLifeCycle; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| |
| |
| /** |
| * This class provides a skeletal implementation of the <code>EntryPoint</code> interface, to |
| * minimize the effort required to implement this interface. |
| * <p> |
| * By default, this implementation creates a maximized main shell without any trimmings. Subclasses |
| * must implement <code>createContents</code> to create the contents of the main shell. In case a |
| * different type of main shell is required, subclasses may also override <code>createShell</code>. |
| * </p> |
| * <p> |
| * This class is compatible with all operation modes of RWT. It is recommended to extend this base |
| * class rather than to implement the EntryPoint interface itself. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public abstract class AbstractEntryPoint implements EntryPoint { |
| |
| private Display display; |
| private Shell shell; |
| |
| /** |
| * This method is called by the framework to initialize the UI. Subclasses should implement |
| * {@link #createContents(Composite)} instead of overriding this method. |
| * |
| * @nooverride This method is not intended to be re-implemented or extended by clients. |
| */ |
| public int createUI() { |
| display = new Display(); |
| shell = createShell( display ); |
| shell.setLayout( new GridLayout( 1, false ) ); |
| createContents( shell ); |
| if( shell.getMaximized() ) { |
| shell.layout(); |
| } else { |
| shell.pack(); |
| } |
| shell.open(); |
| if( getApplicationContext().getLifeCycleFactory().getLifeCycle() instanceof RWTLifeCycle ) { |
| while( !shell.isDisposed() ) { |
| if( !display.readAndDispatch() ) { |
| display.sleep(); |
| } |
| } |
| display.dispose(); |
| } |
| return 0; |
| } |
| |
| /** |
| * Returns the main shell for this entrypoint. |
| * |
| * @return the main shell, or <code>null</code> if the shell is not created yet |
| */ |
| protected Shell getShell() { |
| return shell; |
| } |
| |
| /** |
| * Creates the controls that constitute the UI for this entrypoint. Subclasses must implement this |
| * method and set the parent's layout as needed. |
| * <p> |
| * An implementation must not create an SWT event loop. This is done by the base class as needed. |
| * </p> |
| * |
| * @param parent the parent composite to contain the content |
| */ |
| protected abstract void createContents( Composite parent ); |
| |
| /** |
| * Creates the main shell for this entrypoint. The default implementation creates a maximized |
| * shell without any trimmings. Subclasses may override this method in order to create a different |
| * kind of shell. |
| * |
| * @param display the display to create the shell on |
| * @return the created shell |
| */ |
| protected Shell createShell( Display display ) { |
| Shell shell = new Shell( display, SWT.NO_TRIM ); |
| shell.setMaximized( true ); |
| return shell; |
| } |
| |
| } |