examples/org.eclipse.e4.demo.tools.simpleide/src/org/eclipse/e4/demo/tools/simpleide/VEditorPartDescriptorEditor.java

package org.eclipse.e4.demo.tools.simpleide;

import org.eclipse.e4.tools.services.IResourcePool;

import org.eclipse.e4.tools.emf.ui.internal.ResourceProvider;

import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;

import java.util.List;
import javax.inject.Inject;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.e4.demo.simpleide.model.simpleide.MEditorPartDescriptor;
import org.eclipse.e4.demo.simpleide.model.simpleide.MSimpleideFactory;
import org.eclipse.e4.demo.simpleide.model.simpleide.impl.SimpleidePackageImpl;
import org.eclipse.e4.tools.emf.ui.common.IModelResource;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.ObservableColumnLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.VirtualEntry;
import org.eclipse.e4.ui.model.application.commands.MHandler;
import org.eclipse.e4.ui.model.application.descriptor.basic.MPartDescriptorContainer;
import org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.databinding.edit.EMFEditProperties;
import org.eclipse.emf.databinding.edit.IEMFEditValueProperty;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.MoveCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
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.jface.viewers.TableViewerColumn;
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 VEditorPartDescriptorEditor extends AbstractComponentEditor {
	private Composite composite;
	private EMFDataBindingContext context;
	private TableViewer viewer;
	
	@Inject
	public VEditorPartDescriptorEditor() {
		super();
	}

	@Override
	public Image getImage(Object element, Display display) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public String getLabel(Object element) {
		return "Editor Part Descriptors";
	}

	@Override
	public String getDetailLabel(Object element) {
		return null;
	}

	@Override
	public String getDescription(Object element) {
		return "Editor Part Descriptors Bla Bla Bla Bla";
	}

	@Override
	public Composite doGetEditor(Composite parent, Object object) {
		if( composite == null ) {
			context = new EMFDataBindingContext();
			composite = createForm(parent,context, getMaster());
		}
		VirtualEntry<?> o = (VirtualEntry<?>)object;
		viewer.setInput(o.getList());
		getMaster().setValue(o.getOriginalParent());
		return composite;
	}

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

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

			viewer = new TableViewer(parent);
			ObservableListContentProvider cp = new ObservableListContentProvider();
			viewer.setContentProvider(cp);
			GridData gd = new GridData(GridData.FILL_HORIZONTAL);
			gd.heightHint = 300;
			viewer.getControl().setLayoutData(gd);
			viewer.getTable().setHeaderVisible(true);

			{
				IEMFEditValueProperty prop = EMFEditProperties.value(getEditingDomain(), UiPackageImpl.Literals.UI_LABEL__LABEL);
					
				TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
				column.getColumn().setText("Name");
				column.getColumn().setWidth(200);
				column.setLabelProvider(new ObservableColumnLabelProvider<MHandler>(prop.observeDetail(cp.getKnownElements())));
			}
									
			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("Up");
			b.setImage(createImage(ResourceProvider.IMG_Obj16_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();
							MPartDescriptorContainer container = (MPartDescriptorContainer) getMaster().getValue();
							int idx = container.getDescriptors().indexOf(obj) - 1;
							if( idx >= 0 ) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), SimpleidePackageImpl.Literals.SIMPLE_IDE_APPLICATION__EDITOR_PART_DESCRIPTORS, obj, idx);
								
								if( cmd.canExecute() ) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}
							
						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText("Down");
			b.setImage(createImage(ResourceProvider.IMG_Obj16_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();
							MPartDescriptorContainer container = (MPartDescriptorContainer) getMaster().getValue();
							int idx = container.getDescriptors().indexOf(obj) + 1;
							if( idx < container.getDescriptors().size() ) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), SimpleidePackageImpl.Literals.SIMPLE_IDE_APPLICATION__EDITOR_PART_DESCRIPTORS, obj, idx);
								
								if( cmd.canExecute() ) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}
							
						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText("Add ...");
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_add));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					MEditorPartDescriptor obj = MSimpleideFactory.INSTANCE.createEditorPartDescriptor();
					Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(), SimpleidePackageImpl.Literals.SIMPLE_IDE_APPLICATION__EDITOR_PART_DESCRIPTORS, obj);
					
					if( cmd.canExecute() ) {
						getEditingDomain().getCommandStack().execute(cmd);
//TODO Need to abstract this	editor.setSelection(command);
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText("Remove");
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_delete));
			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<?> commands = ((IStructuredSelection)viewer.getSelection()).toList();
						Command cmd = RemoveCommand.create(getEditingDomain(), getMaster().getValue(), SimpleidePackageImpl.Literals.SIMPLE_IDE_APPLICATION__EDITOR_PART_DESCRIPTORS, commands);
						if( cmd.canExecute() ) {
							getEditingDomain().getCommandStack().execute(cmd);
						}
					}
				}
			});
		}

		return parent;
	}

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

}