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

package org.eclipse.e4.tools.emf.ui.internal.common.component.virtual;

import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.common.ComponentLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
import org.eclipse.e4.tools.emf.ui.internal.common.VirtualEntry;
import org.eclipse.e4.tools.emf.ui.internal.common.commands.AddAddonCommand;
import org.eclipse.e4.tools.emf.ui.internal.common.commands.RemoveAddonCommand;
import org.eclipse.e4.ui.model.application.MAddon;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.impl.ApplicationPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.edit.command.MoveCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.action.Action;
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 VApplicationAddons extends AbstractComponentEditor {
	private Composite composite;
	private ModelEditor editor;
	private TableViewer viewer;
	private EMFDataBindingContext context;
	
	private List<Action> actions = new ArrayList<Action>();
	
	//FIXME We need to plug this stuff into the command frameworks
	private AddAddonCommand addAddonCommand = new AddAddonCommand();
	private RemoveAddonCommand removeAddonCommand = new RemoveAddonCommand();
	
	public VApplicationAddons(EditingDomain editingDomain, ModelEditor editor) {
		super(editingDomain);
		this.editor = editor;
		actions.add(new Action("Add Addon") {
			@Override
			public void run() {
				handleAddAddon();
			}
		});
	}

	@Override
	public Image getImage(Object element, Display display) {
		return null;
	}

	@Override
	public String getLabel(Object element) {
		return "Addons";
	}

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

	@Override
	public String getDescription(Object element) {
		return "Addons bla bla bla bla";
	}

	@Override
	public Composite getEditor(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("Commands");
			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);
			viewer.setLabelProvider(new ComponentLabelProvider(editor));
						
			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(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();
							MApplication container = (MApplication) getMaster().getValue();
							int idx = container.getCommands().indexOf(obj) - 1;
							if( idx >= 0 ) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.APPLICATION__ADDONS, 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(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();
							MApplication container = (MApplication) getMaster().getValue();
							int idx = container.getCommands().indexOf(obj) + 1;
							if( idx < container.getCommands().size() ) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), ApplicationPackageImpl.Literals.APPLICATION__ADDONS, 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(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) {
					handleAddAddon();
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText("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() ) {
						handleRemoveAddons(((IStructuredSelection)viewer.getSelection()).toList());
					}
				}
			});
		}
		
		return parent;
	}
	
	private void handleAddAddon() {
		addAddonCommand.execute(getEditingDomain(), (MApplication) getMaster().getValue());
	}
	
	private void handleRemoveAddons(List<MAddon> addons) {
		removeAddonCommand.execute(getEditingDomain(), addons);
	}
	
	@Override
	public IObservableList getChildList(Object element) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public List<Action> getActions(Object element) {
		ArrayList<Action> l = new ArrayList<Action>(super.getActions(element));
		l.addAll(actions);
		return l;
	}
}