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/*******************************************************************************
* Copyright (c) 2011 Google, Inc.
* 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:
* Google, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.wb.internal.core.model.property.editor;
import org.eclipse.wb.core.controls.CCombo3;
import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.model.property.table.PropertyTable;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
/**
* The {@link PropertyEditor} for selecting single value using {@link CCombo3}.
*
* @author scheglov_ke
* @coverage core.model.property.editor
*/
public abstract class AbstractComboPropertyEditor extends TextDisplayPropertyEditor {
////////////////////////////////////////////////////////////////////////////
//
// Editing
//
////////////////////////////////////////////////////////////////////////////
private CCombo3 m_combo;
private boolean m_doDropDown;
@Override
public boolean activate(final PropertyTable propertyTable, final Property property, Point location)
throws Exception {
// create combo
{
m_combo = new CCombo3(propertyTable, SWT.NONE);
m_doDropDown = true;
// add items
addItems(property, m_combo);
// select item
selectItem(property, m_combo);
}
// add listeners
m_combo.addFocusListener(new FocusAdapter() {
@Override
public void focusLost(FocusEvent e) {
propertyTable.deactivateEditor(true);
}
});
m_combo.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
int index = m_combo.getSelectionIndex();
toProperty(propertyTable, property, index);
}
});
m_combo.addListener(SWT.KeyDown, new Listener() {
public void handleEvent(Event event) {
switch (event.keyCode) {
case SWT.ESC :
propertyTable.deactivateEditor(false);
break;
case SWT.DEL :
try {
property.setValue(Property.UNKNOWN_VALUE);
event.doit = false;
selectItem(property, m_combo);
} catch (Throwable e) {
propertyTable.handleException(e);
propertyTable.deactivateEditor(false);
}
m_combo.doDropDown(false);
break;
}
}
});
m_combo.addMouseListener(new MouseAdapter() {
@Override
public void mouseDoubleClick(MouseEvent e) {
int index = (m_combo.getSelectionIndex() + 1) % m_combo.getItemCount();
toProperty(propertyTable, property, index);
}
});
// keep editor active
return true;
}
@Override
public final void setBounds(Rectangle bounds) {
m_combo.setBounds(bounds);
// editor created without bounds, so activate it after first setBounds()
if (m_doDropDown) {
m_doDropDown = false;
m_combo.setFocus();
m_combo.doDropDown(true);
m_combo.startDrag();
}
}
@Override
public final void deactivate(PropertyTable propertyTable, Property property, boolean save) {
if (m_combo != null) {
m_combo.dispose();
m_combo = null;
}
}
////////////////////////////////////////////////////////////////////////////
//
// Abstract methods
//
////////////////////////////////////////////////////////////////////////////
/**
* Adds items to given {@link CCombo3}.
*/
protected abstract void addItems(Property property, CCombo3 combo) throws Exception;
/**
* Selects current item in given {@link CCombo3}.
*/
protected abstract void selectItem(Property property, CCombo3 combo) throws Exception;
/**
* Transfers data from widget to {@link Property}.
*/
protected abstract void toPropertyEx(Property property, CCombo3 combo, int index)
throws Exception;
/**
* Transfers data from widget to {@link Property}.
*/
private void toProperty(PropertyTable propertyTable, Property property, int index) {
try {
toPropertyEx(property, m_combo, index);
} catch (Throwable e) {
propertyTable.handleException(e);
}
propertyTable.deactivateEditor(false);
}
}
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