/*
* Copyright 2011 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.drools.guvnor.client.decisiontable.cells;
import java.math.BigDecimal;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.regexp.shared.RegExp;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.PopupPanel.PositionCallback;
import com.google.gwt.user.client.ui.TextBox;
/**
* A Popup Text Editor.
*/
public class PopupNumericEditCell extends
AbstractPopupEditCell<BigDecimal, BigDecimal> {
private final TextBox textBox;
// A valid number
private static final RegExp VALID = RegExp.compile( "(^[-+]?[0-9]*\\.?[0-9]*([eE][-+]?[0-9]*)?$)" );
public PopupNumericEditCell() {
super();
this.textBox = new TextBox();
// Tabbing out of the TextBox commits changes
textBox.addKeyDownHandler( new KeyDownHandler() {
public void onKeyDown(KeyDownEvent event) {
boolean keyTab = event.getNativeKeyCode() == KeyCodes.KEY_TAB;
boolean keyEnter = event.getNativeKeyCode() == KeyCodes.KEY_ENTER;
if ( keyEnter
|| keyTab ) {
commit();
}
}
} );
// Restrict entry to navigation and numerics
textBox.addKeyPressHandler( new KeyPressHandler() {
public void onKeyPress(KeyPressEvent event) {
// Permit navigation
int keyCode = event.getNativeEvent().getKeyCode();
if ( event.isControlKeyDown()
|| keyCode == KeyCodes.KEY_BACKSPACE
|| keyCode == KeyCodes.KEY_DELETE
|| keyCode == KeyCodes.KEY_LEFT
|| keyCode == KeyCodes.KEY_RIGHT
|| keyCode == KeyCodes.KEY_TAB ) {
return;
}
// Get new value and validate
int charCode = event.getCharCode();
String oldValue = textBox.getValue();
String newValue = oldValue.substring( 0,
textBox.getCursorPos() );
newValue = newValue
+ ((char) charCode);
newValue = newValue
+ oldValue.substring( textBox.getCursorPos()
+ textBox.getSelectionLength() );
if ( !VALID.test( String.valueOf( newValue ) ) ) {
event.preventDefault();
}
}
} );
vPanel.add( textBox );
}
@Override
public void render(Context context,
BigDecimal value,
SafeHtmlBuilder sb) {
if ( value != null ) {
sb.append( renderer.render( value.toPlainString() ) );
}
}
// Commit the change
@Override
protected void commit() {
// Update value
String text = textBox.getValue();
BigDecimal number = null;
if ( text.length() > 0 ) {
try {
number = new BigDecimal( text );
} catch ( NumberFormatException e ) {
number = new BigDecimal( 0 );
}
}
setValue( lastContext,
lastParent,
number );
if ( valueUpdater != null ) {
valueUpdater.update( number );
}
panel.hide();
}
// Start editing the cell
@Override
protected void startEditing(final Context context,
final Element parent,
final BigDecimal value) {
textBox.setValue( (value == null ? "" : value.toPlainString()) );
panel.setPopupPositionAndShow( new PositionCallback() {
public void setPosition(int offsetWidth,
int offsetHeight) {
panel.setPopupPosition( parent.getAbsoluteLeft()
+ offsetX,
parent.getAbsoluteTop()
+ offsetY );
// Focus the first enabled control
Scheduler.get().scheduleDeferred( new ScheduledCommand() {
public void execute() {
String text = textBox.getValue();
textBox.setFocus( true );
textBox.setCursorPos( text.length() );
textBox.setSelectionRange( 0,
text.length() );
}
} );
}
} );
}
}