1 files changed, 209 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/swt/TableItemModelAdapter.java b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/swt/TableItemModelAdapter.java
new file mode 100644
index 0000000000..aa17710792
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/swt/TableItemModelAdapter.java
@@ -0,0 +1,209 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2008 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.internal.swt;
+
+import org.eclipse.jface.viewers.ITableLabelProvider;
+import org.eclipse.jpt.ui.internal.listeners.SWTPropertyChangeListenerWrapper;
+import org.eclipse.jpt.utility.internal.StringTools;
+import org.eclipse.jpt.utility.model.event.PropertyChangeEvent;
+import org.eclipse.jpt.utility.model.listener.PropertyChangeListener;
+import org.eclipse.jpt.utility.model.value.PropertyValueModel;
+import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.TableItem;
+
+/**
+ * This adapter can be used to keep a table item in synch with the properties of
+ * a model.
+ */
+@SuppressWarnings("nls")
+public class TableItemModelAdapter {
+
+	/** The table item we synchronize with the model. */
+	protected final TableItem tableItem;
+
+	/**
+	 * A listener that allows us to stop listening to stuff when the button
+	 * is disposed.
+	 */
+	protected final DisposeListener tableItemDisposeListener;
+
+	/**
+	 * Client-supplied adapter that provides with the various column settings and
+	 * converts the objects in the LVM into an array of cell models.
+	 */
+	private ColumnAdapter<Object> columnAdapter;
+
+	/**
+	 * The value models used to listen to each property that are display by the
+	 * table item.
+	 */
+	private WritablePropertyValueModel<?>[] valueHolders;
+
+	/**
+	 * The list of <code>PropertyChangeListener</code>s used to be notified when
+	 * the properties of the model being display into a row change.
+	 */
+	private PropertyChangeListener[] propertyChangeListeners;
+
+	/**
+	 * The label used to format the objects into a string representation.
+	 */
+	private ITableLabelProvider labelProvider;
+
+	// ********** static methods **********
+
+	/**
+	 * Adapt the specified boolean to the specified button.
+	 * If the boolean is null, the button's value will be "unselected".
+	 */
+	public static TableItemModelAdapter adapt(TableItem tableItem, ColumnAdapter<?> columnAdapter, ITableLabelProvider labelProvider) {
+		return new TableItemModelAdapter(tableItem, columnAdapter, labelProvider);
+	}
+
+
+	// ********** constructors **********
+
+	/**
+	 * Constructor - the boolean holder and button are required.
+	 */
+	@SuppressWarnings("unchecked")
+	protected TableItemModelAdapter(TableItem tableItem, ColumnAdapter<?> columnAdapter, ITableLabelProvider labelProvider) {
+		super();
+		if (tableItem == null || columnAdapter == null || labelProvider == null) {
+			throw new NullPointerException();
+		}
+		this.tableItem = tableItem;
+		this.labelProvider = labelProvider;
+		this.columnAdapter = (ColumnAdapter<Object>) columnAdapter;
+
+		this.tableItemDisposeListener = this.buildTableItemDisposeListener();
+		this.tableItem.addDisposeListener(this.tableItemDisposeListener);
+
+		this.valueHolders = this.columnAdapter.cellModels(tableItem.getData());
+		this.propertyChangeListeners = this.buildPropertyChangeListeners();
+
+		for (int index = this.columnAdapter.columnCount(); --index >= 0; ) {
+			tableItemChanged(index, tableItem.getData(), false);
+			valueHolders[index].addPropertyChangeListener(PropertyValueModel.VALUE, propertyChangeListeners[index]);
+		}
+	}
+
+
+	// ********** initialization **********
+
+	private PropertyChangeListener[] buildPropertyChangeListeners() {
+		PropertyChangeListener[] listeners = new PropertyChangeListener[columnAdapter.columnCount()];
+		for (int index = listeners.length; --index >= 0; ) {
+			listeners[index] = buildPropertyChangeListener(index);
+		}
+		return listeners;
+	}
+
+
+	protected PropertyChangeListener buildPropertyChangeListener(int index) {
+		return new SWTPropertyChangeListenerWrapper(
+			this.buildPropertyChangeListener_(index)
+		);
+	}
+
+	protected PropertyChangeListener buildPropertyChangeListener_(int index) {
+		return new TableItemPropertyChangeListener(index);
+	}
+
+	protected DisposeListener buildTableItemDisposeListener() {
+		return new DisposeListener() {
+			public void widgetDisposed(DisposeEvent event) {
+				TableItemModelAdapter.this.tableItemDisposed(event);
+			}
+		    @Override
+			public String toString() {
+				return "TableItem dispose listener";
+			}
+		};
+	}
+
+
+	// ********** behavior **********
+
+	protected void tableItemChanged(int index, Object subject, boolean revalidate) {
+
+		if (!this.tableItem.isDisposed()) {
+			this.updateTableItemText(index, subject);
+			this.updateTableItemImage(index, subject);
+
+			if (revalidate) {
+				this.layoutTable();
+			}
+		}
+	}
+
+	private void updateTableItemText(int index, Object subject) {
+		String text = this.labelProvider.getColumnText(subject, index);
+		if (text == null) {
+			text = "";
+		}
+		this.tableItem.setText(index, text);
+	}
+
+	private void updateTableItemImage(int index, Object subject) {
+		Image image = this.labelProvider.getColumnImage(subject, index);
+		this.tableItem.setImage(index, image);
+	}
+
+	private void layoutTable() {
+		// Refresh the table in order to show the scrollbar if required
+		Composite container = this.tableItem.getParent().getParent();
+		container.computeSize(SWT.DEFAULT, SWT.DEFAULT);
+		container.layout();
+	}
+
+	// ********** dispose **********
+
+	protected void tableItemDisposed(DisposeEvent event) {
+		// the button is not yet "disposed" when we receive this event
+		// so we can still remove our listeners
+		this.tableItem.removeDisposeListener(this.tableItemDisposeListener);
+
+		for (int index = valueHolders.length; --index >= 0; ) {
+			valueHolders[index].removePropertyChangeListener(PropertyValueModel.VALUE, propertyChangeListeners[index]);
+		}
+	}
+
+
+	// ********** standard methods **********
+
+	@Override
+	public String toString() {
+		return StringTools.buildToStringFor(this);
+	}
+
+   private class TableItemPropertyChangeListener implements PropertyChangeListener {
+
+   	private final int index;
+
+   	TableItemPropertyChangeListener(int index) {
+   		super();
+   		this.index = index;
+   	}
+
+   	public void propertyChanged(PropertyChangeEvent event) {
+   		if (!tableItem.isDisposed()) {
+   			Table table = tableItem.getParent();
+   			tableItemChanged(index, tableItem.getData(), table.getColumnCount() == 0);
+   		}
+   	}
+   }
+}
+\ No newline at end of file