bundles/org.eclipse.e4.tools.emf.ui/src/org/eclipse/e4/tools/emf/ui/internal/common/component/ModelComponentsEditor.java

/*******************************************************************************
 * Copyright (c) 2010 BestSolution.at 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common.component;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.property.list.IListProperty;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.Messages;
import org.eclipse.e4.tools.emf.ui.internal.common.ComponentLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
import org.eclipse.e4.ui.model.application.MApplicationFactory;
import org.eclipse.e4.ui.model.application.MModelComponent;
import org.eclipse.e4.ui.model.application.MModelComponents;
import org.eclipse.e4.ui.model.application.impl.ApplicationPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFProperties;
import org.eclipse.emf.databinding.IEMFListProperty;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.MoveCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
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.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;

public class ModelComponentsEditor extends AbstractComponentEditor {

	private IListProperty MODEL_COMPONENTS__COMPONENTS = EMFProperties.list(ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS);

	private Composite composite;
	private Image image;
	private ModelEditor editor;

	public ModelComponentsEditor(EditingDomain editingDomain, ModelEditor editor) {
		super(editingDomain);
		this.editor = editor;
	}

	@Override
	public Image getImage(Object element, Display display) {
		if (image == null) {
			try {
				image = loadSharedImage(display, new URL("platform:/plugin/org.eclipse.e4.ui.model.workbench.edit/icons/full/obj16/ModelComponents.gif")); //$NON-NLS-1$
			} catch (MalformedURLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return image;
	}

	@Override
	public String getLabel(Object element) {
		return Messages.ModelComponentsEditor_Label;
	}

	@Override
	public String getDescription(Object element) {
		return Messages.ModelComponentsEditor_Description;
	}

	@Override
	public Composite getEditor(Composite parent, Object object) {
		if (composite == null) {
			composite = createForm(parent);
		}
		getMaster().setValue(object);
		return composite;
	}

	private Composite createForm(Composite parent) {
		parent = new Composite(parent, SWT.NONE);
		parent.setLayout(new GridLayout(3, false));

		{
			Label l = new Label(parent, SWT.NONE);
			l.setText(Messages.ModelComponentsEditor_ModelContributions);
			l.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));

			final TableViewer viewer = new TableViewer(parent);
			viewer.setContentProvider(new ObservableListContentProvider());
			viewer.setLabelProvider(new ComponentLabelProvider(editor));
			GridData gd = new GridData(GridData.FILL_HORIZONTAL);
			gd.heightHint = 300;
			viewer.getControl().setLayoutData(gd);

			IEMFListProperty prop = EMFProperties.list(ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS);
			viewer.setInput(prop.observeDetail(getMaster()));

			Composite buttonComp = new Composite(parent, SWT.NONE);
			buttonComp.setLayoutData(new GridData(GridData.FILL, GridData.END, false, false));
			GridLayout gl = new GridLayout();
			gl.marginLeft = 0;
			gl.marginRight = 0;
			gl.marginWidth = 0;
			gl.marginHeight = 0;
			buttonComp.setLayout(gl);

			Button b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelComponentsEditor_Up);
			b.setImage(getImage(b.getDisplay(), ARROW_UP));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							Object obj = s.getFirstElement();
							MModelComponents container = (MModelComponents) getMaster().getValue();
							int idx = container.getComponents().indexOf(obj) - 1;
							if (idx >= 0) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS, obj, idx);

								if (cmd.canExecute()) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelComponentsEditor_Down);
			b.setImage(getImage(b.getDisplay(), ARROW_DOWN));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							Object obj = s.getFirstElement();
							MModelComponents container = (MModelComponents) getMaster().getValue();
							int idx = container.getComponents().indexOf(obj) + 1;
							if (idx < container.getComponents().size()) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS, obj, idx);

								if (cmd.canExecute()) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelComponentsEditor_Add);
			b.setImage(getImage(b.getDisplay(), TABLE_ADD_IMAGE));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					MModelComponent component = MApplicationFactory.INSTANCE.createModelComponent();

					Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS, component);

					if (cmd.canExecute()) {
						getEditingDomain().getCommandStack().execute(cmd);
						editor.setSelection(component);
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelComponentsEditor_Remove);
			b.setImage(getImage(b.getDisplay(), TABLE_DELETE_IMAGE));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						List<?> elements = ((IStructuredSelection) viewer.getSelection()).toList();

						Command cmd = RemoveCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.MODEL_COMPONENTS__COMPONENTS, elements);
						if (cmd.canExecute()) {
							getEditingDomain().getCommandStack().execute(cmd);
						}
					}
				}
			});
		}

		return parent;
	}

	@Override
	public IObservableList getChildList(Object element) {
		return MODEL_COMPONENTS__COMPONENTS.observe(element);
	}

	@Override
	public String getDetailLabel(Object element) {
		// TODO Auto-generated method stub
		return null;
	}

}