/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.directory.studio.templateeditor.editor.widgets;
import org.apache.directory.studio.entryeditors.IEntryEditor;
import org.apache.directory.studio.ldapbrowser.core.model.IAttribute;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.apache.directory.studio.templateeditor.model.widgets.TemplateTextField;
import org.apache.directory.studio.templateeditor.model.widgets.WidgetAlignment;
/**
* This class implements an editor text field.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class EditorTextField extends EditorWidget<TemplateTextField>
{
/** The text field */
private Text textfield;
/** The modify listener */
private ModifyListener modifyListener = new ModifyListener()
{
public void modifyText( ModifyEvent e )
{
// Getting the value
String value = textfield.getText();
// Replacing '$' by '/n' if needed
if ( getWidget().isDollarSignIsNewLine() )
{
value = value.replace( '\n', '$' );
}
// Updating the attribute's value
updateAttributeValue( value );
}
};
/**
* Creates a new instance of EditorTextField.
*
* @param editor
* the associated editor
* @param templateTextField
* the associated template text field
* @param toolkit
* the associated toolkit
*/
public EditorTextField( IEntryEditor editor, TemplateTextField templateTextField, FormToolkit toolkit )
{
super( templateTextField, editor, toolkit );
}
/**
* {@inheritDoc}
*/
public Composite createWidget( Composite parent )
{
// Creating and initializing the widget UI
Composite composite = initWidget( parent );
// Updating the widget's content
updateWidget();
// Adding the listeners
addListeners();
return composite;
}
/**
* Creates and initializes the widget UI.
*
* @param parent
* the parent composite
* @return
* the associated composite
*/
private Composite initWidget( Composite parent )
{
// Creating the text field
textfield = getToolkit().createText( parent, "", getStyle() ); //$NON-NLS-1$
GridData gd = getGridata();
textfield.setLayoutData( gd );
// Setting the characters limit
if ( getWidget().getCharactersLimit() != -1 )
{
textfield.setTextLimit( getWidget().getCharactersLimit() );
}
// Calculating height for multiple rows
int numberOfRows = getWidget().getNumberOfRows();
if ( numberOfRows != 1 )
{
GC gc = new GC( parent );
try
{
gc.setFont( textfield.getFont() );
FontMetrics fontMetrics = gc.getFontMetrics();
gd.heightHint = fontMetrics.getHeight() * numberOfRows;
}
finally
{
gc.dispose();
}
}
textfield.pack();
return parent;
}
/**
* Gets the style of the widget.
*
* @return
* the style of the widget
*/
private int getStyle()
{
int style = SWT.BORDER | SWT.WRAP;
// Multiple lines?
if ( getWidget().getNumberOfRows() == 1 )
{
style |= SWT.SINGLE;
}
else
{
style |= SWT.MULTI;
}
// Horizontal alignment set to end?
if ( getWidget().getHorizontalAlignment() == WidgetAlignment.END )
{
style |= SWT.RIGHT;
}
// Horizontal alignment set to center?
else if ( getWidget().getHorizontalAlignment() == WidgetAlignment.CENTER )
{
style |= SWT.CENTER;
}
return style;
}
/**
* Updates the widget's content.
*/
private void updateWidget()
{
IAttribute attribute = getAttribute();
if ( ( attribute != null ) && ( attribute.isString() ) && ( attribute.getValueSize() > 0 ) )
{
// Saving the current caret position by getting the current selection
Point selection = textfield.getSelection();
// Getting the text to display
String text = attribute.getStringValue();
// Replacing '$' by '/n' (if needed)
if ( getWidget().isDollarSignIsNewLine() )
{
text = text.replace( '$', '\n' );
}
// Assigning the text to the label
textfield.setText( text );
// Restoring the current caret position
textfield.setSelection( selection );
}
else
{
// There's no value to display
textfield.setText( "" ); //$NON-NLS-1$
}
}
/**
* Adds the listeners.
*/
private void addListeners()
{
if ( ( textfield != null ) && ( !textfield.isDisposed() ) )
{
textfield.addModifyListener( modifyListener );
}
}
/**
* Removes the listeners.
*/
private void removeListeners()
{
if ( ( textfield != null ) && ( !textfield.isDisposed() ) )
{
textfield.removeModifyListener( modifyListener );
}
}
/**
* {@inheritDoc}
*/
public void update()
{
removeListeners();
updateWidget();
addListeners();
}
/**
* {@inheritDoc}
*/
public void dispose()
{
removeListeners();
}
}