/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.properties.celleditors;
import java.text.MessageFormat;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jst.jsf.common.ui.internal.utils.StyleCombo;
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.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
/**
* Combo cell editor
*
*/
public class StyleComboCellEditor extends CellEditor {
/**
* The list of items to present in the combo box.
*/
private String[] items;
/**
* The zero-based index of the selected item.
*/
int selection;
/**
* The custom combo box control.
*/
StyleCombo comboBox;
/**
* Default ComboBoxCellEditor style
*/
private static final int defaultStyle = SWT.NONE;
/**
* Default constructor
*/
public StyleComboCellEditor() {
setStyle(defaultStyle);
}
/**
* @param parent
* @param items
*/
public StyleComboCellEditor(Composite parent, String[] items) {
this(parent, items, defaultStyle);
}
/**
* @param parent
* @param items
* @param style
*/
public StyleComboCellEditor(Composite parent, String[] items, int style) {
super(parent, style);
setItems(items);
}
/**
* Returns the list of choices for the combo box
*
* @return the list of choices for the combo box
*/
public String[] getItems() {
return this.items;
}
/**
* Sets the list of choices for the combo box
*
* @param items
* the list of choices for the combo box
*/
public void setItems(String[] items) {
Assert.isNotNull(items);
this.items = items;
populateComboBoxItems();
}
/*
* (non-Javadoc) Method declared on CellEditor.
*/
protected Control createControl(Composite parent) {
comboBox = new StyleCombo(parent, getStyle());
comboBox.setFont(parent.getFont());
comboBox.addKeyListener(new KeyAdapter() {
// hook key pressed - see PR 14201
public void keyPressed(KeyEvent e) {
keyReleaseOccured(e);
}
});
comboBox.addSelectionListener(new SelectionAdapter() {
public void widgetDefaultSelected(SelectionEvent event) {
applyEditorValueAndDeactivate();
}
public void widgetSelected(SelectionEvent event) {
selection = comboBox.getSelectionIndex();
}
});
comboBox.addTraverseListener(new TraverseListener() {
public void keyTraversed(TraverseEvent e) {
if (e.detail == SWT.TRAVERSE_ESCAPE
|| e.detail == SWT.TRAVERSE_RETURN) {
e.doit = false;
}
}
});
comboBox.addFocusListener(new FocusAdapter() {
public void focusLost(FocusEvent e) {
StyleComboCellEditor.this.focusLost();
}
});
return comboBox;
}
/**
* The <code>ComboBoxCellEditor</code> implementation of this
* <code>CellEditor</code> framework method returns the zero-based index
* of the current selection.
*
* @return the zero-based index of the current selection wrapped as an
* <code>Integer</code>
*/
protected Object doGetValue() {
return new Integer(selection);
}
/*
* (non-Javadoc) Method declared on CellEditor.
*/
protected void doSetFocus() {
comboBox.setFocus();
}
/**
* The <code>ComboBoxCellEditor</code> implementation of this
* <code>CellEditor</code> framework method sets the minimum width of the
* cell. The minimum width is 10 characters if <code>comboBox</code> is
* not <code>null</code> or <code>disposed</code> eles it is 60 pixels
* to make sure the arrow button and some text is visible. The list of
* CCombo will be wide enough to show its longest item.
*/
public LayoutData getLayoutData() {
LayoutData layoutData = super.getLayoutData();
if ((comboBox == null) || comboBox.isDisposed())
layoutData.minimumWidth = 60;
else {
// make the comboBox 10 characters wide
GC gc = new GC(comboBox);
layoutData.minimumWidth = (gc.getFontMetrics()
.getAverageCharWidth() * 10) + 10;
gc.dispose();
}
return layoutData;
}
/**
* The <code>ComboBoxCellEditor</code> implementation of this
* <code>CellEditor</code> framework method accepts a zero-based index of
* a selection.
*
* @param value
* the zero-based index of the selection wrapped as an
* <code>Integer</code>
*/
protected void doSetValue(Object value) {
Assert.isTrue(comboBox != null && (value instanceof Integer));
selection = ((Integer) value).intValue();
comboBox.select(selection);
}
/**
* Updates the list of choices for the combo box for the current control.
*/
private void populateComboBoxItems() {
if (comboBox != null && items != null) {
comboBox.removeAll();
for (int i = 0; i < items.length; i++)
comboBox.add(items[i], i);
setValueValid(true);
selection = 0;
}
}
/**
* Applies the currently selected value and deactiavates the cell editor
*/
void applyEditorValueAndDeactivate() {
// must set the selection before getting value
selection = comboBox.getSelectionIndex();
Object newValue = doGetValue();
markDirty();
boolean isValid = isCorrect(newValue);
setValueValid(isValid);
if (!isValid) {
// try to insert the current value into the error message.
setErrorMessage(MessageFormat.format(getErrorMessage(),
new Object[] { items[selection] }));
}
fireApplyEditorValue();
deactivate();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.CellEditor#focusLost()
*/
protected void focusLost() {
if (isActivated()) {
applyEditorValueAndDeactivate();
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.CellEditor#keyReleaseOccured(org.eclipse.swt.events.KeyEvent)
*/
protected void keyReleaseOccured(KeyEvent keyEvent) {
if (keyEvent.character == '\u001b') { // Escape character
fireCancelEditor();
} else if (keyEvent.character == '\t') { // tab key
applyEditorValueAndDeactivate();
}
}
}