My extended TextArea widget finally works (thanks JAD...)...
Hereunder the code for fellow developers (for ULC 6.1)...
Regards,
Alberto A. Smulders
HostDat Lda. - Portugal
** SERVER **
package pt.hostdat.hcc.common.util.component.xtextarea.server;
import com.ulcjava.base.application.ULCTextArea;
/**
* Server-side code of extended TextArea component
*
* @author Alberto Smulders
*/
public class ULCXTextArea extends ULCTextArea {
private int fMaxCharacters = 0;
protected void uploadStateUI() {
super.uploadStateUI();
setStateUI("maxCharacters", 0, fMaxCharacters);
}
public int getMaxCharacters() {
return fMaxCharacters;
}
public void setMaxCharacters(int maxCharacters) {
fMaxCharacters = setStateUI("maxCharacters", fMaxCharacters,
maxCharacters);
}
protected String typeString() {
return
"pt.hostdat.hcc.common.util.component.xtextarea.client.UIXTextArea";
}
}
** CLIENT **
package pt.hostdat.hcc.common.util.component.xtextarea.client;
import com.ulcjava.base.client.UITextArea;
import com.ulcjava.base.client.UiPlainDocument;
/**
* Client-side code of extended TextArea component
*
* @author Alberto Smulders
*/
public class UIXTextArea extends UITextArea {
private BasicTextArea fTextArea = null;
private DocumentSizeFilter fDocumentSizeFilter = new
DocumentSizeFilter();
protected Object createBasicObject(Object[] a) {
System.out.println("createBasicObject!");
if (fTextArea == null) {
fTextArea = new BasicTextArea();
}
return fTextArea;
}
protected void postInitializeState() {
super.postInitializeState();
((UiPlainDocument)fTextArea.getDocument()).setDocumentFilter(fDocumentSizeFilter);
}
public int getMaxCharacter() {
return fDocumentSizeFilter.getMaxCharacters();
}
public void setMaxCharacters(int maxCharacters) {
System.out.println("UIXTextArea.setMaxCharacters : " +
maxCharacters);
if (maxCharacters >= 0) {
fDocumentSizeFilter.setMaxCharacters(maxCharacters);
}
}
}
package pt.hostdat.hcc.common.util.component.xtextarea.client;
import java.awt.Toolkit;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
/**
* Custom document filter to limit size of entry in text fields
*
* @author Alberto Smulders
*/
public class DocumentSizeFilter extends DocumentFilter {
private int fMaxCharacters = 0;
public int getMaxCharacters() {
return fMaxCharacters;
}
public void setMaxCharacters(int maxCharacters) {
fMaxCharacters = maxCharacters;
}
public void insertString(FilterBypass fb,
int offset, String string,
AttributeSet attr)
throws BadLocationException {
replace(fb, offset, 0, string, attr);
}
public void replace(FilterBypass fb,
int offset, int length, String
text,
AttributeSet attrs)
throws BadLocationException {
int newLength = fb.getDocument().getLength() - length +
text.length();
if (fMaxCharacters == 0 || newLength <= fMaxCharacters) {
fb.replace(offset, length, text, attrs);
}
else {
Toolkit.getDefaultToolkit().beep();
}
}
}
--
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