jpa/tests/org.eclipse.jpt.ui.tests/src/org/eclipse/jpt/ui/tests/internal/utility/swt/DropDownListBoxModelBindingUITest.java - dali/webtools.dali - Git at Google

 /*******************************************************************************
  * Copyright (c) 2009, 2010 Oracle. 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:
  *     Oracle - initial API and implementation
  ******************************************************************************/
 package org.eclipse.jpt.ui.tests.internal.utility.swt;

 import java.text.Collator;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;

 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.ActionContributionItem;
 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.window.ApplicationWindow;
 import org.eclipse.jface.window.Window;
 import org.eclipse.jpt.ui.internal.utility.swt.SWTTools;
 import org.eclipse.jpt.utility.internal.model.AbstractModel;
 import org.eclipse.jpt.utility.internal.model.value.ListAspectAdapter;
 import org.eclipse.jpt.utility.internal.model.value.PropertyAspectAdapter;
 import org.eclipse.jpt.utility.internal.model.value.SimplePropertyValueModel;
 import org.eclipse.jpt.utility.internal.model.value.SortedListValueModelWrapper;
 import org.eclipse.jpt.utility.model.Model;
 import org.eclipse.jpt.utility.model.value.ListValueModel;
 import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.layout.FormAttachment;
 import org.eclipse.swt.layout.FormData;
 import org.eclipse.swt.layout.FormLayout;
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;

 /**
  * Play around with a set of read-only combo-boxes.
  */
 @SuppressWarnings("nls")
 public class DropDownListBoxModelBindingUITest
 	extends ApplicationWindow
 {
 	final TaskList taskList;
 	private final WritablePropertyValueModel<TaskList> taskListHolder;
 	private Text taskTextField;

 	public static void main(String[] args) throws Exception {
 		Window window = new DropDownListBoxModelBindingUITest(args);
 		window.setBlockOnOpen(true);
 		window.open();
 		Display.getCurrent().dispose();
 		System.exit(0);
 	}

 	private DropDownListBoxModelBindingUITest(@SuppressWarnings("unused") String[] args) {
 		super(null);
 		this.taskList = new TaskList();
 		this.taskListHolder = new SimplePropertyValueModel<TaskList>(this.taskList);
 		this.taskList.addTask("swim");
 		this.taskList.addTask("bike");
 		this.taskList.addTask("run");
 		Task rest = this.taskList.addTask("rest");
 		this.taskList.addTask("repeat");
 		this.taskList.setPriorityTask(rest);
 	}

 	@Override
 	protected Control createContents(Composite parent) {
 		((Shell) parent).setText(this.getClass().getSimpleName());
 		parent.setSize(800, 300);
 		Composite mainPanel = new Composite(parent, SWT.NONE);
 		mainPanel.setLayout(new FormLayout());
 		Control taskListPanel = this.buildTaskListPanel(mainPanel);
 		this.buildControlPanel(mainPanel, taskListPanel);
 		return mainPanel;
 	}

 	private Control buildTaskListPanel(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);

 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100, -30);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FormLayout());
 		this.buildTaskListPanel_(panel);  // false = native (Combo)

 		return panel;
 	}

 	private Control buildTaskListPanel_(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);

 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(50);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FormLayout());
 		this.buildPrimitiveTaskListPanel(panel);
 		this.buildObjectTaskListPanel(panel);

 		return panel;
 	}

 	private void buildPrimitiveTaskListPanel(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);

 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(50);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FillLayout());
 		this.buildUnsortedPrimitiveListPanel(panel);
 		this.buildStandardSortedPrimitiveListPanel(panel);
 		this.buildCustomSortedPrimitiveListPanel(panel);
 	}

 	private void buildObjectTaskListPanel(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);

 		FormData fd = new FormData();
 			fd.top = new FormAttachment(50);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FillLayout());
 		this.buildUnsortedObjectListPanel(panel);
 		this.buildStandardSortedObjectListPanel(panel);
 		this.buildCustomSortedObjectListPanel(panel);
 	}

 	private void buildUnsortedPrimitiveListPanel(Composite parent) {
 		String label = "primitive unsorted";
 		this.buildComboBoxPanel(parent, label, this.buildUnsortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
 	}

 	private void buildStandardSortedPrimitiveListPanel(Composite parent) {
 		String label = "primitive sorted";
 		this.buildComboBoxPanel(parent, label, this.buildStandardSortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
 	}

 	private void buildCustomSortedPrimitiveListPanel(Composite parent) {
 		String label = "primitive reverse sorted";
 		this.buildComboBoxPanel(parent, label, this.buildCustomSortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
 	}

 	private void buildUnsortedObjectListPanel(Composite parent) {
 		String label = "object unsorted";
 		this.buildComboBoxPanel(parent, label, this.buildUnsortedObjectListModel(), this.buildPriorityTaskAdapter());
 	}

 	private void buildStandardSortedObjectListPanel(Composite parent) {
 		String label = "object sorted";
 		this.buildComboBoxPanel(parent, label, this.buildStandardSortedObjectListModel(), this.buildPriorityTaskAdapter());
 	}

 	private void buildCustomSortedObjectListPanel(Composite parent) {
 		String label = "object reverse sorted";
 		this.buildComboBoxPanel(parent, label, this.buildCustomSortedObjectListModel(), this.buildPriorityTaskAdapter());
 	}

 	private ListValueModel<String> buildUnsortedPrimitiveListModel() {
 		return this.buildPrimitiveTaskListAdapter();
 	}

 	private ListValueModel<String> buildStandardSortedPrimitiveListModel() {
 		return new SortedListValueModelWrapper<String>(this.buildPrimitiveTaskListAdapter());
 	}

 	private ListValueModel<String> buildCustomSortedPrimitiveListModel() {
 		return new SortedListValueModelWrapper<String>(this.buildPrimitiveTaskListAdapter(), this.buildCustomStringComparator());
 	}

 	private ListValueModel<Task> buildUnsortedObjectListModel() {
 		return this.buildObjectTaskListAdapter();
 	}

 	private ListValueModel<Task> buildStandardSortedObjectListModel() {
 		return new SortedListValueModelWrapper<Task>(this.buildObjectTaskListAdapter());
 	}

 	private ListValueModel<Task> buildCustomSortedObjectListModel() {
 		return new SortedListValueModelWrapper<Task>(this.buildObjectTaskListAdapter(), this.buildCustomTaskComparator());
 	}

 	private <E> void buildComboBoxPanel(Composite parent, String label, ListValueModel<E> model, WritablePropertyValueModel<E> selectedItemModel) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		panel.setLayout(new FormLayout());

 		Label comboBoxLabel = new Label(panel, SWT.LEFT | SWT.VERTICAL);
 		comboBoxLabel.setText(label);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0, 3);
 			fd.bottom = new FormAttachment(0, 20);
 			fd.left = new FormAttachment(0, 5);
 			fd.right = new FormAttachment(100);
 		comboBoxLabel.setLayoutData(fd);

 		Combo comboBox = this.buildComboBox(panel);
 		fd = new FormData();
 			fd.top = new FormAttachment(comboBoxLabel);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		comboBox.setLayoutData(fd);
 		SWTTools.bind(model, selectedItemModel, comboBox);  // use #toString()
 	}

 	private Combo buildComboBox(Composite parent) {
 		return new Combo(parent, SWT.READ_ONLY);
 	}

 	private Comparator<String> buildCustomStringComparator() {
 		return new Comparator<String>() {
 			public int compare(String s1, String s2) {
 				return s2.compareTo(s1);
 			}
 		};
 	}

 	private Comparator<Task> buildCustomTaskComparator() {
 		return new Comparator<Task>() {
 			public int compare(Task to1, Task to2) {
 				return to2.compareTo(to1);
 			}
 		};
 	}

 	private ListValueModel<String> buildPrimitiveTaskListAdapter() {
 		return new ListAspectAdapter<TaskList, String>(this.taskListHolder, TaskList.TASK_NAMES_LIST) {
 			@Override
 			protected ListIterator<String> listIterator_() {
 				return this.subject.taskNames();
 			}
 		};
 	}

 	private ListValueModel<Task> buildObjectTaskListAdapter() {
 		return new ListAspectAdapter<TaskList, Task>(this.taskListHolder, TaskList.TASKS_LIST) {
 			@Override
 			protected ListIterator<Task> listIterator_() {
 				return this.subject.tasks();
 			}
 		};
 	}

 	private WritablePropertyValueModel<Task> buildPriorityTaskAdapter() {
 		return new PriorityTaskAdapter(this.taskListHolder);
 	}

 	static class PriorityTaskAdapter
 		extends PropertyAspectAdapter<TaskList, Task>
 	{
 		PriorityTaskAdapter(WritablePropertyValueModel<TaskList> taskListHolder) {
 			super(taskListHolder, TaskList.PRIORITY_TASK_PROPERTY);
 		}
 		@Override
 		protected Task buildValue_() {
 			return this.subject.getPriorityTask();
 		}
 		@Override
 		protected void setValue_(Task value) {
 			this.subject.setPriorityTask(value);
 		}
 	}

 	private WritablePropertyValueModel<String> buildPriorityTaskNameAdapter() {
 		return new PriorityTaskNameAdapter(this.taskListHolder);
 	}

 	static class PriorityTaskNameAdapter
 		extends PropertyAspectAdapter<TaskList, String>
 	{
 		PriorityTaskNameAdapter(WritablePropertyValueModel<TaskList> taskListHolder) {
 			super(taskListHolder, TaskList.PRIORITY_TASK_NAME_PROPERTY);
 		}
 		@Override
 		protected String buildValue_() {
 			return this.subject.getPriorityTaskName();
 		}
 		@Override
 		protected void setValue_(String value) {
 			// ignore
 		}
 	}

 	private void buildControlPanel(Composite parent, Control taskListPanel) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(taskListPanel);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FormLayout());
 		Control misc = this.buildMiscTaskPanel(panel);
 		this.buildAddRemoveTaskPanel(panel, misc);
 	}

 	// is there a better way to associate an ACI with form data?
 	private Control buildMiscTaskPanel(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(100, -400);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FillLayout());
 		this.buildClearListACI().fill(panel);
 		this.buildClearModelACI().fill(panel);
 		this.buildRestoreModelACI().fill(panel);
 		this.buildChangePriorityTaskACI().fill(panel);
 		this.buildClearPriorityTaskACI().fill(panel);
 		return panel;
 	}

 	private ActionContributionItem buildClearListACI() {
 		Action action = new Action("clear list", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.clearTasks();
 			}
 		};
 		action.setToolTipText("clear all the tasks");
 		return new ActionContributionItem(action);
 	}

 	private ActionContributionItem buildClearModelACI() {
 		Action action = new Action("clear model", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.clearModel();
 			}
 		};
 		action.setToolTipText("clear the task list model");
 		return new ActionContributionItem(action);
 	}

 	private ActionContributionItem buildRestoreModelACI() {
 		Action action = new Action("restore model", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.restoreModel();
 			}
 		};
 		action.setToolTipText("restore the task list model");
 		return new ActionContributionItem(action);
 	}

 	private ActionContributionItem buildChangePriorityTaskACI() {
 		Action action = new Action("change priority", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.changePriorityTask();
 			}
 		};
 		action.setToolTipText("change the priority task");
 		return new ActionContributionItem(action);
 	}

 	private ActionContributionItem buildClearPriorityTaskACI() {
 		Action action = new Action("clear priority", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.clearPriorityTask();
 			}
 		};
 		action.setToolTipText("clear the priority task");
 		return new ActionContributionItem(action);
 	}

 	private void buildAddRemoveTaskPanel(Composite parent, Control clearButton) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(clearButton);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FormLayout());
 		Control addButton = this.buildAddButton(panel);
 		Control removeButton = this.buildRemoveButton(panel);
 		this.buildTaskTextField(panel, addButton, removeButton);
 	}

 	// is there a better way to associate an ACI with form data?
 	private Control buildAddButton(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(0);
 			fd.right = new FormAttachment(0, 50);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FillLayout());
 		this.buildAddACI().fill(panel);
 		return panel;
 	}

 	private ActionContributionItem buildAddACI() {
 		Action action = new Action("add", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.addTask();
 			}
 		};
 		action.setToolTipText("add a task with the name in the entry field");
 		return new ActionContributionItem(action);
 	}

 	// is there a better way to associate an ACI with form data?
 	private Control buildRemoveButton(Composite parent) {
 		Composite panel = new Composite(parent, SWT.NONE);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(100, -50);
 			fd.right = new FormAttachment(100);
 		panel.setLayoutData(fd);

 		panel.setLayout(new FillLayout());
 		this.buildRemoveACI().fill(panel);
 		return panel;
 	}

 	private ActionContributionItem buildRemoveACI() {
 		Action action = new Action("remove", IAction.AS_PUSH_BUTTON) {
 			@Override
 			public void run() {
 				DropDownListBoxModelBindingUITest.this.removeTask();
 			}
 		};
 		action.setToolTipText("remove the task with the name in the entry field");
 		return new ActionContributionItem(action);
 	}

 	private void buildTaskTextField(Composite parent, Control addButton, Control removeButton) {
 		this.taskTextField = new Text(parent, SWT.SINGLE | SWT.BORDER);
 		FormData fd = new FormData();
 			fd.top = new FormAttachment(0);
 			fd.bottom = new FormAttachment(100);
 			fd.left = new FormAttachment(addButton);
 			fd.right = new FormAttachment(removeButton);
 		this.taskTextField.setLayoutData(fd);
 	}

 	private String taskTextFieldText() {
 		return this.taskTextField.getText();
 	}

 	void addTask() {
 		String taskText = this.taskTextFieldText();
 		if (taskText.length() != 0) {
 			this.taskList.addTask(taskText);
 		}
 	}

 	void removeTask() {
 		String task = this.taskTextFieldText();
 		if (task.length() != 0) {
 			this.taskList.removeTask(task);
 		}
 	}

 	void clearTasks() {
 		this.taskList.clearTasks();
 	}

 	void clearModel() {
 		this.taskListHolder.setValue(null);
 	}

 	void restoreModel() {
 		this.taskListHolder.setValue(this.taskList);
 	}

 	void changePriorityTask() {
 		boolean found = false;
 		for (Task task : this.taskList.getTasks()) {
 			if (this.taskList.getPriorityTask() == task) {
 				found = true;
 			} else {
 				if (found) {
 					this.taskList.setPriorityTask(task);
 					return;
 				}
 			}
 		}
 		Iterator<Task> tasks = this.taskList.tasks();
 		if (tasks.hasNext()) {
 			this.taskList.setPriorityTask(tasks.next());
 		}
 	}

 	void clearPriorityTask() {
 		this.taskList.setPriorityTask(null);
 	}


 	// ********** TaskList **********

 	// note absence of validation...
 	public static class TaskList extends AbstractModel {
 		private final List<String> taskNames = new ArrayList<String>();
 			public static final String TASK_NAMES_LIST = "taskNames";
 		private final List<Task> tasks = new ArrayList<Task>();
 			public static final String TASKS_LIST = "tasks";
 		private String priorityTaskName = null;
 			public static final String PRIORITY_TASK_NAME_PROPERTY = "priorityTaskName";
 		private Task priorityTask = null;
 			public static final String PRIORITY_TASK_PROPERTY = "priorityTask";
 		public TaskList() {
 			super();
 		}
 		public ListIterator<String> taskNames() {
 			return this.taskNames.listIterator();
 		}
 		public Iterable<Task> getTasks() {
 			return this.tasks;
 		}
 		public ListIterator<Task> tasks() {
 			return this.tasks.listIterator();
 		}
 		public String getPriorityTaskName() {
 			return this.priorityTaskName;
 		}
 		public Task getPriorityTask() {
 			return this.priorityTask;
 		}
 		public Task addTask(String taskName) {
 			this.addItemToList(taskName, this.taskNames, TASK_NAMES_LIST);
 			Task task = new Task(taskName);
 			this.addItemToList(task, this.tasks, TASKS_LIST);
 			return task;
 		}
 		public void removeTask(String taskName) {
 			int index = this.taskNames.indexOf(taskName);
 			if (index != -1) {
 				Task task = this.tasks.get(index);
 				if (task == this.priorityTask) {
 					this.setPriorityTask(null);
 				}
 				// assume the indexes match...
 				this.removeItemFromList(index, this.taskNames, TASK_NAMES_LIST);
 				this.removeItemFromList(index, this.tasks, TASKS_LIST);
 			}
 		}
 		public void clearTasks() {
 			this.setPriorityTask(null);
 			this.clearList(this.taskNames, TASK_NAMES_LIST);
 			this.clearList(this.tasks, TASKS_LIST);
 		}
 		private void setPriorityTaskName(String priorityTaskName) {
 			String old = this.priorityTaskName;
 			this.priorityTaskName = priorityTaskName;
 			this.firePropertyChanged(PRIORITY_TASK_NAME_PROPERTY, old, priorityTaskName);
 		}
 		public void setPriorityTask(Task priorityTask) {
 			Task old = this.priorityTask;
 			this.priorityTask = priorityTask;
 			this.firePropertyChanged(PRIORITY_TASK_PROPERTY, old, priorityTask);
 			this.setPriorityTaskName((priorityTask == null) ? null : priorityTask.getName());
 		}
 	}


 	// ********** Task **********

 	public static class Task extends AbstractModel implements Displayable {
 		private String name;
 		private int instanceCount;
 		private static int INSTANCE_COUNT = 1;
 		public Task(String name) {
 			this.name = name;
 			this.instanceCount = INSTANCE_COUNT++;
 		}
 		public String displayString() {
 			return this.name + ": " + this.instanceCount;
 		}
 		public int compareTo(Displayable o) {
 			return DEFAULT_COMPARATOR.compare(this, o);
 		}
 		public String getName() {
 			return this.name;
 		}
 		public void setName(String name) {
 			Object old = this.name;
 			this.name = name;
 			this.firePropertyChanged(DISPLAY_STRING_PROPERTY, old, name);
 		}
 		@Override
 		public String toString() {
 			return this.displayString();
 		}
 	}

 	public interface Displayable extends Model, Comparable<Displayable> {

 		String displayString();
 			String DISPLAY_STRING_PROPERTY = "displayString";


 		// ********** helper implementations **********

 		Collator DEFAULT_COLLATOR = Collator.getInstance();

 		Comparator<Displayable> DEFAULT_COMPARATOR =
 			new Comparator<Displayable>() {
 				public int compare(Displayable d1, Displayable d2) {
 					// disallow duplicates based on object identity
 					if (d1 == d2) {
 						return 0;
 					}

 					// first compare display strings using the default collator
 					int result = DEFAULT_COLLATOR.compare(d1.displayString(), d2.displayString());
 					if (result != 0) {
 						return result;
 					}

 					// then compare using object-id
 					result = System.identityHashCode(d1) - System.identityHashCode(d2);
 					if (result != 0) {
 						return result;
 					}

 					// It's unlikely that we get to this point; but, just in case, we will return -1.
 					// Unfortunately, this introduces some mild unpredictability to the sort order
 					// (unless the objects are always passed into this method in the same order).
 					return -1;		// if all else fails, indicate that o1 < o2
 				}
 				@Override
 				public String toString() {
 					return "Displayable.DEFAULT_COMPARATOR";
 				}
 			};

 	}
 }
	/*******************************************************************************
	* Copyright (c) 2009, 2010 Oracle. 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:
	* Oracle - initial API and implementation
	******************************************************************************/
	package org.eclipse.jpt.ui.tests.internal.utility.swt;

	import java.text.Collator;
	import java.util.ArrayList;
	import java.util.Comparator;
	import java.util.Iterator;
	import java.util.List;
	import java.util.ListIterator;

	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.action.ActionContributionItem;
	import org.eclipse.jface.action.IAction;
	import org.eclipse.jface.window.ApplicationWindow;
	import org.eclipse.jface.window.Window;
	import org.eclipse.jpt.ui.internal.utility.swt.SWTTools;
	import org.eclipse.jpt.utility.internal.model.AbstractModel;
	import org.eclipse.jpt.utility.internal.model.value.ListAspectAdapter;
	import org.eclipse.jpt.utility.internal.model.value.PropertyAspectAdapter;
	import org.eclipse.jpt.utility.internal.model.value.SimplePropertyValueModel;
	import org.eclipse.jpt.utility.internal.model.value.SortedListValueModelWrapper;
	import org.eclipse.jpt.utility.model.Model;
	import org.eclipse.jpt.utility.model.value.ListValueModel;
	import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.layout.FormAttachment;
	import org.eclipse.swt.layout.FormData;
	import org.eclipse.swt.layout.FormLayout;
	import org.eclipse.swt.widgets.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;

	/**
	* Play around with a set of read-only combo-boxes.
	*/
	@SuppressWarnings("nls")
	public class DropDownListBoxModelBindingUITest
	extends ApplicationWindow
	{
	final TaskList taskList;
	private final WritablePropertyValueModel<TaskList> taskListHolder;
	private Text taskTextField;

	public static void main(String[] args) throws Exception {
	Window window = new DropDownListBoxModelBindingUITest(args);
	window.setBlockOnOpen(true);
	window.open();
	Display.getCurrent().dispose();
	System.exit(0);
	}

	private DropDownListBoxModelBindingUITest(@SuppressWarnings("unused") String[] args) {
	super(null);
	this.taskList = new TaskList();
	this.taskListHolder = new SimplePropertyValueModel<TaskList>(this.taskList);
	this.taskList.addTask("swim");
	this.taskList.addTask("bike");
	this.taskList.addTask("run");
	Task rest = this.taskList.addTask("rest");
	this.taskList.addTask("repeat");
	this.taskList.setPriorityTask(rest);
	}

	@Override
	protected Control createContents(Composite parent) {
	((Shell) parent).setText(this.getClass().getSimpleName());
	parent.setSize(800, 300);
	Composite mainPanel = new Composite(parent, SWT.NONE);
	mainPanel.setLayout(new FormLayout());
	Control taskListPanel = this.buildTaskListPanel(mainPanel);
	this.buildControlPanel(mainPanel, taskListPanel);
	return mainPanel;
	}

	private Control buildTaskListPanel(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);

	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100, -30);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FormLayout());
	this.buildTaskListPanel_(panel); // false = native (Combo)

	return panel;
	}

	private Control buildTaskListPanel_(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);

	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(50);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FormLayout());
	this.buildPrimitiveTaskListPanel(panel);
	this.buildObjectTaskListPanel(panel);

	return panel;
	}

	private void buildPrimitiveTaskListPanel(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);

	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(50);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FillLayout());
	this.buildUnsortedPrimitiveListPanel(panel);
	this.buildStandardSortedPrimitiveListPanel(panel);
	this.buildCustomSortedPrimitiveListPanel(panel);
	}

	private void buildObjectTaskListPanel(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);

	FormData fd = new FormData();
	fd.top = new FormAttachment(50);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FillLayout());
	this.buildUnsortedObjectListPanel(panel);
	this.buildStandardSortedObjectListPanel(panel);
	this.buildCustomSortedObjectListPanel(panel);
	}

	private void buildUnsortedPrimitiveListPanel(Composite parent) {
	String label = "primitive unsorted";
	this.buildComboBoxPanel(parent, label, this.buildUnsortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
	}

	private void buildStandardSortedPrimitiveListPanel(Composite parent) {
	String label = "primitive sorted";
	this.buildComboBoxPanel(parent, label, this.buildStandardSortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
	}

	private void buildCustomSortedPrimitiveListPanel(Composite parent) {
	String label = "primitive reverse sorted";
	this.buildComboBoxPanel(parent, label, this.buildCustomSortedPrimitiveListModel(), this.buildPriorityTaskNameAdapter());
	}

	private void buildUnsortedObjectListPanel(Composite parent) {
	String label = "object unsorted";
	this.buildComboBoxPanel(parent, label, this.buildUnsortedObjectListModel(), this.buildPriorityTaskAdapter());
	}

	private void buildStandardSortedObjectListPanel(Composite parent) {
	String label = "object sorted";
	this.buildComboBoxPanel(parent, label, this.buildStandardSortedObjectListModel(), this.buildPriorityTaskAdapter());
	}

	private void buildCustomSortedObjectListPanel(Composite parent) {
	String label = "object reverse sorted";
	this.buildComboBoxPanel(parent, label, this.buildCustomSortedObjectListModel(), this.buildPriorityTaskAdapter());
	}

	private ListValueModel<String> buildUnsortedPrimitiveListModel() {
	return this.buildPrimitiveTaskListAdapter();
	}

	private ListValueModel<String> buildStandardSortedPrimitiveListModel() {
	return new SortedListValueModelWrapper<String>(this.buildPrimitiveTaskListAdapter());
	}

	private ListValueModel<String> buildCustomSortedPrimitiveListModel() {
	return new SortedListValueModelWrapper<String>(this.buildPrimitiveTaskListAdapter(), this.buildCustomStringComparator());
	}

	private ListValueModel<Task> buildUnsortedObjectListModel() {
	return this.buildObjectTaskListAdapter();
	}

	private ListValueModel<Task> buildStandardSortedObjectListModel() {
	return new SortedListValueModelWrapper<Task>(this.buildObjectTaskListAdapter());
	}

	private ListValueModel<Task> buildCustomSortedObjectListModel() {
	return new SortedListValueModelWrapper<Task>(this.buildObjectTaskListAdapter(), this.buildCustomTaskComparator());
	}

	private <E> void buildComboBoxPanel(Composite parent, String label, ListValueModel<E> model, WritablePropertyValueModel<E> selectedItemModel) {
	Composite panel = new Composite(parent, SWT.NONE);
	panel.setLayout(new FormLayout());

	Label comboBoxLabel = new Label(panel, SWT.LEFT \| SWT.VERTICAL);
	comboBoxLabel.setText(label);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0, 3);
	fd.bottom = new FormAttachment(0, 20);
	fd.left = new FormAttachment(0, 5);
	fd.right = new FormAttachment(100);
	comboBoxLabel.setLayoutData(fd);

	Combo comboBox = this.buildComboBox(panel);
	fd = new FormData();
	fd.top = new FormAttachment(comboBoxLabel);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	comboBox.setLayoutData(fd);
	SWTTools.bind(model, selectedItemModel, comboBox); // use #toString()
	}

	private Combo buildComboBox(Composite parent) {
	return new Combo(parent, SWT.READ_ONLY);
	}

	private Comparator<String> buildCustomStringComparator() {
	return new Comparator<String>() {
	public int compare(String s1, String s2) {
	return s2.compareTo(s1);
	}
	};
	}

	private Comparator<Task> buildCustomTaskComparator() {
	return new Comparator<Task>() {
	public int compare(Task to1, Task to2) {
	return to2.compareTo(to1);
	}
	};
	}

	private ListValueModel<String> buildPrimitiveTaskListAdapter() {
	return new ListAspectAdapter<TaskList, String>(this.taskListHolder, TaskList.TASK_NAMES_LIST) {
	@Override
	protected ListIterator<String> listIterator_() {
	return this.subject.taskNames();
	}
	};
	}

	private ListValueModel<Task> buildObjectTaskListAdapter() {
	return new ListAspectAdapter<TaskList, Task>(this.taskListHolder, TaskList.TASKS_LIST) {
	@Override
	protected ListIterator<Task> listIterator_() {
	return this.subject.tasks();
	}
	};
	}

	private WritablePropertyValueModel<Task> buildPriorityTaskAdapter() {
	return new PriorityTaskAdapter(this.taskListHolder);
	}

	static class PriorityTaskAdapter
	extends PropertyAspectAdapter<TaskList, Task>
	{
	PriorityTaskAdapter(WritablePropertyValueModel<TaskList> taskListHolder) {
	super(taskListHolder, TaskList.PRIORITY_TASK_PROPERTY);
	}
	@Override
	protected Task buildValue_() {
	return this.subject.getPriorityTask();
	}
	@Override
	protected void setValue_(Task value) {
	this.subject.setPriorityTask(value);
	}
	}

	private WritablePropertyValueModel<String> buildPriorityTaskNameAdapter() {
	return new PriorityTaskNameAdapter(this.taskListHolder);
	}

	static class PriorityTaskNameAdapter
	extends PropertyAspectAdapter<TaskList, String>
	{
	PriorityTaskNameAdapter(WritablePropertyValueModel<TaskList> taskListHolder) {
	super(taskListHolder, TaskList.PRIORITY_TASK_NAME_PROPERTY);
	}
	@Override
	protected String buildValue_() {
	return this.subject.getPriorityTaskName();
	}
	@Override
	protected void setValue_(String value) {
	// ignore
	}
	}

	private void buildControlPanel(Composite parent, Control taskListPanel) {
	Composite panel = new Composite(parent, SWT.NONE);
	FormData fd = new FormData();
	fd.top = new FormAttachment(taskListPanel);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FormLayout());
	Control misc = this.buildMiscTaskPanel(panel);
	this.buildAddRemoveTaskPanel(panel, misc);
	}

	// is there a better way to associate an ACI with form data?
	private Control buildMiscTaskPanel(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(100, -400);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FillLayout());
	this.buildClearListACI().fill(panel);
	this.buildClearModelACI().fill(panel);
	this.buildRestoreModelACI().fill(panel);
	this.buildChangePriorityTaskACI().fill(panel);
	this.buildClearPriorityTaskACI().fill(panel);
	return panel;
	}

	private ActionContributionItem buildClearListACI() {
	Action action = new Action("clear list", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.clearTasks();
	}
	};
	action.setToolTipText("clear all the tasks");
	return new ActionContributionItem(action);
	}

	private ActionContributionItem buildClearModelACI() {
	Action action = new Action("clear model", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.clearModel();
	}
	};
	action.setToolTipText("clear the task list model");
	return new ActionContributionItem(action);
	}

	private ActionContributionItem buildRestoreModelACI() {
	Action action = new Action("restore model", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.restoreModel();
	}
	};
	action.setToolTipText("restore the task list model");
	return new ActionContributionItem(action);
	}

	private ActionContributionItem buildChangePriorityTaskACI() {
	Action action = new Action("change priority", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.changePriorityTask();
	}
	};
	action.setToolTipText("change the priority task");
	return new ActionContributionItem(action);
	}

	private ActionContributionItem buildClearPriorityTaskACI() {
	Action action = new Action("clear priority", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.clearPriorityTask();
	}
	};
	action.setToolTipText("clear the priority task");
	return new ActionContributionItem(action);
	}

	private void buildAddRemoveTaskPanel(Composite parent, Control clearButton) {
	Composite panel = new Composite(parent, SWT.NONE);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(clearButton);
	panel.setLayoutData(fd);

	panel.setLayout(new FormLayout());
	Control addButton = this.buildAddButton(panel);
	Control removeButton = this.buildRemoveButton(panel);
	this.buildTaskTextField(panel, addButton, removeButton);
	}

	// is there a better way to associate an ACI with form data?
	private Control buildAddButton(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(0);
	fd.right = new FormAttachment(0, 50);
	panel.setLayoutData(fd);

	panel.setLayout(new FillLayout());
	this.buildAddACI().fill(panel);
	return panel;
	}

	private ActionContributionItem buildAddACI() {
	Action action = new Action("add", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.addTask();
	}
	};
	action.setToolTipText("add a task with the name in the entry field");
	return new ActionContributionItem(action);
	}

	// is there a better way to associate an ACI with form data?
	private Control buildRemoveButton(Composite parent) {
	Composite panel = new Composite(parent, SWT.NONE);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(100, -50);
	fd.right = new FormAttachment(100);
	panel.setLayoutData(fd);

	panel.setLayout(new FillLayout());
	this.buildRemoveACI().fill(panel);
	return panel;
	}

	private ActionContributionItem buildRemoveACI() {
	Action action = new Action("remove", IAction.AS_PUSH_BUTTON) {
	@Override
	public void run() {
	DropDownListBoxModelBindingUITest.this.removeTask();
	}
	};
	action.setToolTipText("remove the task with the name in the entry field");
	return new ActionContributionItem(action);
	}

	private void buildTaskTextField(Composite parent, Control addButton, Control removeButton) {
	this.taskTextField = new Text(parent, SWT.SINGLE \| SWT.BORDER);
	FormData fd = new FormData();
	fd.top = new FormAttachment(0);
	fd.bottom = new FormAttachment(100);
	fd.left = new FormAttachment(addButton);
	fd.right = new FormAttachment(removeButton);
	this.taskTextField.setLayoutData(fd);
	}

	private String taskTextFieldText() {
	return this.taskTextField.getText();
	}

	void addTask() {
	String taskText = this.taskTextFieldText();
	if (taskText.length() != 0) {
	this.taskList.addTask(taskText);
	}
	}

	void removeTask() {
	String task = this.taskTextFieldText();
	if (task.length() != 0) {
	this.taskList.removeTask(task);
	}
	}

	void clearTasks() {
	this.taskList.clearTasks();
	}

	void clearModel() {
	this.taskListHolder.setValue(null);
	}

	void restoreModel() {
	this.taskListHolder.setValue(this.taskList);
	}

	void changePriorityTask() {
	boolean found = false;
	for (Task task : this.taskList.getTasks()) {
	if (this.taskList.getPriorityTask() == task) {
	found = true;
	} else {
	if (found) {
	this.taskList.setPriorityTask(task);
	return;
	}
	}
	}
	Iterator<Task> tasks = this.taskList.tasks();
	if (tasks.hasNext()) {
	this.taskList.setPriorityTask(tasks.next());
	}
	}

	void clearPriorityTask() {
	this.taskList.setPriorityTask(null);
	}


	// ******** TaskList ********

	// note absence of validation...
	public static class TaskList extends AbstractModel {
	private final List<String> taskNames = new ArrayList<String>();
	public static final String TASK_NAMES_LIST = "taskNames";
	private final List<Task> tasks = new ArrayList<Task>();
	public static final String TASKS_LIST = "tasks";
	private String priorityTaskName = null;
	public static final String PRIORITY_TASK_NAME_PROPERTY = "priorityTaskName";
	private Task priorityTask = null;
	public static final String PRIORITY_TASK_PROPERTY = "priorityTask";
	public TaskList() {
	super();
	}
	public ListIterator<String> taskNames() {
	return this.taskNames.listIterator();
	}
	public Iterable<Task> getTasks() {
	return this.tasks;
	}
	public ListIterator<Task> tasks() {
	return this.tasks.listIterator();
	}
	public String getPriorityTaskName() {
	return this.priorityTaskName;
	}
	public Task getPriorityTask() {
	return this.priorityTask;
	}
	public Task addTask(String taskName) {
	this.addItemToList(taskName, this.taskNames, TASK_NAMES_LIST);
	Task task = new Task(taskName);
	this.addItemToList(task, this.tasks, TASKS_LIST);
	return task;
	}
	public void removeTask(String taskName) {
	int index = this.taskNames.indexOf(taskName);
	if (index != -1) {
	Task task = this.tasks.get(index);
	if (task == this.priorityTask) {
	this.setPriorityTask(null);
	}
	// assume the indexes match...
	this.removeItemFromList(index, this.taskNames, TASK_NAMES_LIST);
	this.removeItemFromList(index, this.tasks, TASKS_LIST);
	}
	}
	public void clearTasks() {
	this.setPriorityTask(null);
	this.clearList(this.taskNames, TASK_NAMES_LIST);
	this.clearList(this.tasks, TASKS_LIST);
	}
	private void setPriorityTaskName(String priorityTaskName) {
	String old = this.priorityTaskName;
	this.priorityTaskName = priorityTaskName;
	this.firePropertyChanged(PRIORITY_TASK_NAME_PROPERTY, old, priorityTaskName);
	}
	public void setPriorityTask(Task priorityTask) {
	Task old = this.priorityTask;
	this.priorityTask = priorityTask;
	this.firePropertyChanged(PRIORITY_TASK_PROPERTY, old, priorityTask);
	this.setPriorityTaskName((priorityTask == null) ? null : priorityTask.getName());
	}
	}


	// ******** Task ********

	public static class Task extends AbstractModel implements Displayable {
	private String name;
	private int instanceCount;
	private static int INSTANCE_COUNT = 1;
	public Task(String name) {
	this.name = name;
	this.instanceCount = INSTANCE_COUNT++;
	}
	public String displayString() {
	return this.name + ": " + this.instanceCount;
	}
	public int compareTo(Displayable o) {
	return DEFAULT_COMPARATOR.compare(this, o);
	}
	public String getName() {
	return this.name;
	}
	public void setName(String name) {
	Object old = this.name;
	this.name = name;
	this.firePropertyChanged(DISPLAY_STRING_PROPERTY, old, name);
	}
	@Override
	public String toString() {
	return this.displayString();
	}
	}

	public interface Displayable extends Model, Comparable<Displayable> {

	String displayString();
	String DISPLAY_STRING_PROPERTY = "displayString";


	// ******** helper implementations ********

	Collator DEFAULT_COLLATOR = Collator.getInstance();

	Comparator<Displayable> DEFAULT_COMPARATOR =
	new Comparator<Displayable>() {
	public int compare(Displayable d1, Displayable d2) {
	// disallow duplicates based on object identity
	if (d1 == d2) {
	return 0;
	}

	// first compare display strings using the default collator
	int result = DEFAULT_COLLATOR.compare(d1.displayString(), d2.displayString());
	if (result != 0) {
	return result;
	}

	// then compare using object-id
	result = System.identityHashCode(d1) - System.identityHashCode(d2);
	if (result != 0) {
	return result;
	}

	// It's unlikely that we get to this point; but, just in case, we will return -1.
	// Unfortunately, this introduces some mild unpredictability to the sort order
	// (unless the objects are always passed into this method in the same order).
	return -1; // if all else fails, indicate that o1 < o2
	}
	@Override
	public String toString() {
	return "Displayable.DEFAULT_COMPARATOR";
	}
	};

	}
	}