/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.erlide.ui.dialogs.fields;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
/**
* Dialog field containing a label and a combo control.
*/
public class ComboDialogField extends DialogField {
private String fText;
private int fSelectionIndex;
private String[] fItems;
private Combo fComboControl;
private ModifyListener fModifyListener;
private final int fFlags;
public ComboDialogField(final int flags) {
super();
fText = ""; //$NON-NLS-1$
fItems = new String[0];
fFlags = flags;
fSelectionIndex = -1;
}
// ------- layout helpers
/*
* @see DialogField#doFillIntoGrid
*/
@Override
public Control[] doFillIntoGrid(final Composite parent, final int nColumns) {
assertEnoughColumns(nColumns);
final Label label = getLabelControl(parent);
label.setLayoutData(gridDataForLabel(1));
final Combo combo = getComboControl(parent);
combo.setLayoutData(gridDataForCombo(nColumns - 1));
return new Control[] { label, combo };
}
/*
* @see DialogField#getNumberOfControls
*/
@Override
public int getNumberOfControls() {
return 2;
}
protected static GridData gridDataForCombo(final int span) {
final GridData gd = new GridData();
gd.horizontalAlignment = GridData.FILL;
gd.grabExcessHorizontalSpace = false;
gd.horizontalSpan = span;
return gd;
}
// ------- focus methods
/*
* @see DialogField#setFocus
*/
@Override
public boolean setFocus() {
if (isOkToUse(fComboControl)) {
fComboControl.setFocus();
}
return true;
}
// ------- ui creation
/**
* Creates or returns the created combo control.
*
* @param parent
* The parent composite or <code>null</code> when the widget has
* already been created.
*/
public Combo getComboControl(final Composite parent) {
if (fComboControl == null) {
assertCompositeNotNull(parent);
fModifyListener = new ModifyListener() {
@Override
public void modifyText(final ModifyEvent e) {
doModifyText(e);
}
};
final SelectionListener selectionListener = new SelectionListener() {
@Override
public void widgetSelected(final SelectionEvent e) {
doSelectionChanged(e);
}
@Override
public void widgetDefaultSelected(final SelectionEvent e) {
}
};
fComboControl = new Combo(parent, fFlags);
// moved up due to 1GEUNW2
fComboControl.setItems(fItems);
if (fSelectionIndex != -1) {
fComboControl.select(fSelectionIndex);
} else {
fComboControl.setText(fText);
}
fComboControl.setFont(parent.getFont());
fComboControl.addModifyListener(fModifyListener);
fComboControl.addSelectionListener(selectionListener);
fComboControl.setEnabled(isEnabled());
}
return fComboControl;
}
protected void doModifyText(final ModifyEvent e) {
if (isOkToUse(fComboControl)) {
fText = fComboControl.getText();
fSelectionIndex = fComboControl.getSelectionIndex();
}
dialogFieldChanged();
}
protected void doSelectionChanged(final SelectionEvent e) {
if (isOkToUse(fComboControl)) {
fItems = fComboControl.getItems();
fText = fComboControl.getText();
fSelectionIndex = fComboControl.getSelectionIndex();
}
dialogFieldChanged();
}
// ------ enable / disable management
/*
* @see DialogField#updateEnableState
*/
@Override
protected void updateEnableState() {
super.updateEnableState();
if (isOkToUse(fComboControl)) {
fComboControl.setEnabled(isEnabled());
}
}
// ------ text access
/**
* Gets the combo items.
*/
public String[] getItems() {
return fItems;
}
/**
* Sets the combo items. Triggers a dialog-changed event.
*/
public void setItems(final String[] items) {
fItems = items;
if (isOkToUse(fComboControl)) {
fComboControl.setItems(items);
}
dialogFieldChanged();
}
/**
* Gets the text.
*/
public String getText() {
return fText;
}
/**
* Sets the text. Triggers a dialog-changed event.
*/
public void setText(final String text) {
fText = text;
if (isOkToUse(fComboControl)) {
fComboControl.setText(text);
} else {
dialogFieldChanged();
}
}
/**
* Selects an item.
*/
public boolean selectItem(final int index) {
boolean success = false;
if (isOkToUse(fComboControl)) {
fComboControl.select(index);
success = fComboControl.getSelectionIndex() == index;
} else {
if (index >= 0 && index < fItems.length) {
fText = fItems[index];
fSelectionIndex = index;
success = true;
}
}
if (success) {
dialogFieldChanged();
}
return success;
}
/**
* Selects an item.
*/
public boolean selectItem(final String name) {
for (int i = 0; i < fItems.length; i++) {
if (fItems[i].equals(name)) {
return selectItem(i);
}
}
return false;
}
public int getSelectionIndex() {
return fSelectionIndex;
}
/**
* Sets the text without triggering a dialog-changed event.
*/
public void setTextWithoutUpdate(final String text) {
fText = text;
if (isOkToUse(fComboControl)) {
fComboControl.removeModifyListener(fModifyListener);
fComboControl.setText(text);
fComboControl.addModifyListener(fModifyListener);
}
}
@Override
public void refresh() {
super.refresh();
setTextWithoutUpdate(fText);
}
}