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/*******************************************************************************
* 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.jsf.common.ui.internal.dialogfield;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.forms.widgets.FormToolkit;
/**
* This will display a labal and a group of radio buttons. The group of radio
* buttons will be layed out horizontally use a RowLayout, and them as a group
* will use one cell in the GridLayout.
*
* Whenever the radios selection change will fire both dialogFieldChanged() and
* dialogFieldApplied() event.
*
* @author mengbo
*/
public class RadiosDialogField extends DialogFieldBase {
final static private String INDEXKEY = "INDEX"; //$NON-NLS-1$
private Composite _group;
private String[] _items;
private Button[] _button;
private int _selectIndex = -1;
private boolean _fireEvent = true;
/**
* Default constructor
*/
public RadiosDialogField() {
super();
}
/**
* this method must be called before create control
*
* @param items
*/
public void setItems(String[] items) {
_items = items;
_button = new Button[_items.length];
}
// ------- layout helpers
/*
* @see DialogField#doFillIntoGrid
*/
public Control[] doFillIntoGrid(FormToolkit toolkit, Composite parent,
int nColumns) {
assertEnoughColumns(nColumns);
Control requiredLabel = getRequiredLabelControl(toolkit, parent);
requiredLabel.setLayoutData(gridDataForLabel(1));
Control label = getLabelControl(toolkit, parent);
label.setLayoutData(gridDataForLabel(1));
_group = getGroup(toolkit, parent);
_group.setLayoutData(gridDataForGroup(nColumns - 2));
return new Control[] { requiredLabel, label, _group };
}
/*
* @see DialogField#getNumberOfControls
*/
public int getNumberOfControls() {
return 3;
}
/**
* @param span
* @return the grid data
*/
protected static GridData gridDataForGroup(int span) {
GridData gd = new GridData();
gd.horizontalAlignment = GridData.FILL;
gd.grabExcessHorizontalSpace = false;
gd.horizontalSpan = span;
return gd;
}
// ------- focus methods
/*
* @see DialogField#setFocus
*/
public boolean setFocus() {
if (isOkToUse(_group)) {
_group.setFocus();
}
return true;
}
// ------- ui creation
/**
* @param toolkit
* @param parent
* @return the group composite
*/
public Composite getGroup(FormToolkit toolkit, Composite parent) {
if (_group == null || _group.isDisposed()) {
assertCompositeNotNull(parent);
if (toolkit != null) {
_group = toolkit.createComposite(parent);
} else {
_group = new Composite(parent, SWT.NONE);
}
RowLayout layout = new RowLayout();
layout.marginBottom = 0;
_group.setLayout(layout);
for (int i = 0; i < _items.length; i++) {
if (toolkit != null) {
_button[i] = toolkit.createButton(_group, _items[i],
SWT.RADIO);
} else {
_button[i] = new Button(_group, SWT.RADIO);
_button[i].setText(_items[i]);
}
_button[i].setData(INDEXKEY, new Integer(i));
_button[i].addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
if (_fireEvent) {
_selectIndex = ((Integer) e.widget
.getData(INDEXKEY)).intValue();
// FIXME: seemed will fire widgetSelected twice, one
// for the deselect one,
// one for the newly selected one. Need investigate.
if (((Button) e.widget).getSelection()) {
dialogFieldChangedAndApplied();
}
}
}
});
}
}
return _group;
}
// ------ enable / disable management
/*
* @see DialogField#updateEnableState
*/
protected void updateEnableState() {
super.updateEnableState();
if (isOkToUse(_group)) {
_group.setEnabled(isEnabled());
}
}
// ------ text access
/**
* Sets the text. Triggers a dialog-changed event.
* @param index
*/
public void setSelectedIndex(int index) {
_selectIndex = index;
if (isOkToUse(_group)) {
if (_selectIndex >= 0 && _selectIndex < _items.length) {
_button[_selectIndex].setSelection(true);
} else {
for (int i = 0; i < _items.length; i++) {
if (_button[i].getSelection()) {
_button[i].setSelection(false);
}
}
}
}
dialogFieldChangedAndApplied();
}
/**
* Sets the text without triggering a dialog-changed event.
* @param index
*/
public void setSelectedIndexWithoutUpdate(int index) {
_selectIndex = index;
if (isOkToUse(_group)) {
_fireEvent = false;
if (_selectIndex >= 0 && _selectIndex < _items.length) {
_button[_selectIndex].setSelection(true);
} else {
for (int i = 0; i < _items.length; i++) {
if (_button[i].getSelection()) {
_button[i].setSelection(false);
}
}
}
_fireEvent = true;
}
}
/**
* @return the index selected
*/
public int getSelectedIndex() {
return _selectIndex;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.jsf.common.ui.internal.dialogfield.DialogField#handleGrabHorizontal()
*/
public void handleGrabHorizontal() {
LayoutUtil.setGrabHorizontal(this._group, true);
}
}
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