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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.core.controls.CComboBox;
import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.model.property.table.PropertyTable;
import org.eclipse.wb.internal.core.utils.execution.ExecutionUtils;
import org.eclipse.wb.internal.core.utils.execution.RunnableEx;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
/**
* The {@link PropertyEditor} for selecting single value using {@link CComboBox}. This editor has
* in-line search-feature and is more suitable (vs {@link AbstractComboPropertyEditor}) for
* properties with large lists of value items.
*
* @author sablin_aa
* @author scheglov_ke
* @coverage core.model.property.editor
*/
public abstract class AbstractComboBoxPropertyEditor extends TextDisplayPropertyEditor {
////////////////////////////////////////////////////////////////////////////
//
// Editing
//
////////////////////////////////////////////////////////////////////////////
private CComboBox m_combo;
private String m_dropDelayedText;
@Override
public final boolean activate(final PropertyTable propertyTable,
final Property property,
Point location) throws Exception {
m_combo = new CComboBox(propertyTable, SWT.NONE);
// initialize
addItems(property, m_combo);
selectItem(property, m_combo);
// install listeners
m_combo.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
handleKeyPressed(propertyTable, property, e);
}
});
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) {
propertyTable.deactivateEditor(true);
}
});
m_combo.setFocus();
// schedule showing drop-down, because we don't have bounds yet
ExecutionUtils.runAsync(new RunnableEx() {
public void run() throws Exception {
m_combo.comboDropDown(true);
if (m_dropDelayedText != null) {
m_combo.setEditText(m_dropDelayedText);
m_combo.setEditSelection(m_dropDelayedText.length(), m_dropDelayedText.length());
m_dropDelayedText = null;
}
}
});
// keep editor active
return true;
}
private void handleKeyPressed(PropertyTable propertyTable, Property property, KeyEvent e) {
if (e.keyCode == SWT.ESC) {
propertyTable.deactivateEditor(false);
} else if (e.keyCode == SWT.ARROW_UP || e.keyCode == SWT.ARROW_DOWN) {
e.doit = false;
propertyTable.deactivateEditor(true);
propertyTable.navigate(e);
}
}
@Override
public final void deactivate(PropertyTable propertyTable, Property property, boolean save) {
if (save) {
toProperty(propertyTable, property);
}
if (m_combo != null) {
m_combo.dispose();
m_combo = null;
}
}
private void toProperty(PropertyTable propertyTable, Property property) {
try {
toPropertyEx(property, m_combo);
} catch (Throwable e) {
propertyTable.handleException(e);
}
}
@Override
public void setBounds(Rectangle bounds) {
m_combo.setBounds(bounds);
}
@Override
public void keyDown(PropertyTable propertyTable, Property property, KeyEvent event)
throws Exception {
boolean withAlt = (event.stateMask & SWT.ALT) != 0;
boolean withCtrl = (event.stateMask & SWT.CTRL) != 0;
if (event.character > 0x20 && !(withAlt || withCtrl)) {
propertyTable.activateEditor(property, null);
m_dropDelayedText = "" + event.character;
}
}
////////////////////////////////////////////////////////////////////////////
//
// Abstract methods
//
////////////////////////////////////////////////////////////////////////////
/**
* Adds items to given {@link CComboBox}.
*/
protected abstract void addItems(Property property, CComboBox combo) throws Exception;
/**
* Selects current item in given {@link CCombo3}.
*/
protected void selectItem(Property property, CComboBox combo) throws Exception {
}
/**
* Transfers data from widget to {@link Property}.
*/
protected abstract void toPropertyEx(Property property, CComboBox combo) throws Exception;
}
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