com.habibsweb.commons.components.JIntTextArea Maven / Gradle / Ivy
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/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.habibsweb.commons.components;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.DocumentFilter;
import javax.swing.text.PlainDocument;
/**
* *Creates a JTextArea that can allow setting a maximum number of
* characters and will accept only a numeric input
*
* @author Charles Hamilton
*/
public class JIntTextArea extends JLimitedTextArea {
/**
* Constructs a new JIntTextArea. A default model is set, the initial string
* is null, and rows/columns are set to 0.
*/
public JIntTextArea() {
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the specified text displayed. A
* default model is created, rows/columns are set to 0, and there is no
* maximum limit.
*
* @param text the text to be displayed, or null
*/
public JIntTextArea(String text) {
super(text);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new empty JIntTextArea with the specified number of rows and
* columns. A default model is created, and the initial string is null.
*
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(int rows, int columns) {
super(rows, columns);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the specified text and number of rows
* and columns. A default model is created.
*
* @param text the text to be displayed, or null
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(String text, int rows, int columns) {
super(text, rows, columns);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the given document model, and defaults
* for all of the other arguments (null, 0, 0).
*
* @param doc the model to use
*/
public JIntTextArea(Document doc) {
super(doc);
PlainDocument doc2 = (PlainDocument) this.getDocument();
doc2.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the specified number of rows and
* columns, and the given model. All of the constructors feed through this
* constructor.
*
* @param doc the model to use, or create a default one if null
* @param text the text to be displayed, null if none
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(Document doc, String text, int rows, int columns) {
super(doc, text, rows, columns);
PlainDocument doc2 = (PlainDocument) this.getDocument();
doc2.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with a specified maximum input length. A
* default model is set, the initial string is null, rows/columns are set to
* 0.
*
* @param maxLength Maximum length of the input allowed
*/
public JIntTextArea(int maxLength) {
super(maxLength);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
** Constructs a new JIntTextArea with a specified text and maximum input
* length. A default model is set, the initial string is null, rows/columns
* are set to 0.
*
* @param text the text to be displayed, or null
* @param maxLength maximum length of the input allowed
*/
public JIntTextArea(String text, int maxLength) {
super(text, maxLength);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new empty JIntTextArea with the specified number of rows and
* columns. The maximum input length is specified. A default model is
* created, and the initial string is null.
*
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @param maxLength maximum length of the input allowed
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(int rows, int columns, int maxLength) {
super(rows, columns, maxLength);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the specified text and number of rows
* and columns. A default model is created. The maximum length of the input
* is specified
*
* @param text the text to be displayed, or null
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @param maxLength maximum length of the input allowed
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(String text, int rows, int columns, int maxLength) {
super(text, rows, columns, maxLength);
PlainDocument doc = (PlainDocument) this.getDocument();
doc.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the given document model, and defaults
* for all of the other arguments (null, 0, 0). The maximum length of the
* input is specified
*
* @param doc the model to use
* @param maxLength maximum length of the input allowed
*/
public JIntTextArea(Document doc, int maxLength) {
super(doc, maxLength);
PlainDocument doc2 = (PlainDocument) this.getDocument();
doc2.setDocumentFilter(new MyIntFilter());
}
/**
* Constructs a new JIntTextArea with the specified number of rows and
* columns, and the given model. The maximum length of the input is
* specified
*
* @param doc the model to use, or create a default one if null
* @param text the text to be displayed, null if none
* @param rows the number of rows >= 0
* @param columns the number of columns >= 0
* @param maxLength maximum length of the input allowed
* @exception IllegalArgumentException if the rows or columns arguments are
* negative.
*/
public JIntTextArea(Document doc, String text, int rows, int columns, int maxLength) {
super(doc, text, rows, columns, maxLength);
PlainDocument doc2 = (PlainDocument) this.getDocument();
doc2.setDocumentFilter(new MyIntFilter());
}
}
class MyIntFilter extends DocumentFilter {
@Override
public void insertString(FilterBypass fb, int offset, String string,
AttributeSet attr) throws BadLocationException {
Document doc = fb.getDocument();
StringBuilder sb = new StringBuilder();
sb.append(doc.getText(0, doc.getLength()));
sb.insert(offset, string);
if (test(sb.toString())) {
super.insertString(fb, offset, string, attr);
} else {
// warn the user and don't allow the insert
}
}
public boolean test(String text) {
try {
if (text.equalsIgnoreCase("-")) {
return true;
}
Integer.parseInt(text);
return true;
} catch (NumberFormatException e) {
return false;
}
}
@Override
public void replace(FilterBypass fb, int offset, int length, String text,
AttributeSet attrs) throws BadLocationException {
Document doc = fb.getDocument();
StringBuilder sb = new StringBuilder();
sb.append(doc.getText(0, doc.getLength()));
sb.replace(offset, offset + length, text);
if (test(sb.toString())) {
super.replace(fb, offset, length, text, attrs);
} else {
// warn the user and don't allow the insert
}
}
@Override
public void remove(FilterBypass fb, int offset, int length)
throws BadLocationException {
Document doc = fb.getDocument();
StringBuilder sb = new StringBuilder();
sb.append(doc.getText(0, doc.getLength()));
sb.delete(offset, offset + length);
if (test(sb.toString())) {
super.remove(fb, offset, length);
} else {
// warn the user and don't allow the insert
}
}
}