Revision: 13677
http://gate.svn.sourceforge.net/gate/?rev=13677&view=rev
Author: valyt
Date: 2011-04-15 13:04:29 +0000 (Fri, 15 Apr 2011)
Log Message:
-----------
Better support for textual features in the Annotation Schema Editor:
- customised text editor, which allows null values (by pressing a dedicated
button)
- initialise textual feature values with null, if no actual value was provided
Modified Paths:
--------------
gate/trunk/src/gate/gui/annedit/SchemaFeaturesEditor.java
Added Paths:
-----------
gate/trunk/src/gate/gui/annedit/JNullableTextField.java
Added: gate/trunk/src/gate/gui/annedit/JNullableTextField.java
===================================================================
--- gate/trunk/src/gate/gui/annedit/JNullableTextField.java
(rev 0)
+++ gate/trunk/src/gate/gui/annedit/JNullableTextField.java 2011-04-15
13:04:29 UTC (rev 13677)
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 1995-2011, The University of Sheffield. See the file
+ * COPYRIGHT.txt in the software or at http://gate.ac.uk/gate/COPYRIGHT.txt
+ *
+ * This file is part of GATE (see http://gate.ac.uk/), and is free
+ * software, licenced under the GNU Library General Public License,
+ * Version 2, June 1991 (in the distribution as file licence.html,
+ * and also available at http://gate.ac.uk/gate/licence.html).
+
+ * Valentin Tablan, 15 Apr 2011
+ *
+ * $Id$
+ */
+package gate.gui.annedit;
+
+import gate.gui.MainFrame;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Insets;
+import java.awt.event.ActionEvent;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.swing.AbstractAction;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import javax.swing.border.Border;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+
+/**
+ * An encapsulation of {@link JTextField} and a {@link JButton} that allows
+ * the text value to be set to null by pressing the button. Provides the
minimal
+ * API required for the needs of {@link SchemaFeaturesEditor}.
+ */
+public class JNullableTextField extends JPanel {
+ private static final long serialVersionUID = -1530694436281692216L;
+
+ protected class NullifyTextAction extends AbstractAction {
+ private static final long serialVersionUID = -7807829141939910776L;
+
+ public NullifyTextAction() {
+ super(null, MainFrame.getIcon("delete"));
+ putValue(SHORT_DESCRIPTION, "Removes this feature completely");
+ }
+
+ public void actionPerformed(ActionEvent e) {
+ textField.setText(null);
+ text = null;
+ fireInsertUpdate(null);
+ }
+ }
+
+ protected JButton nullifyButton;
+
+ protected JTextField textField;
+
+ protected Color normalBgColor;
+
+ protected Color nullBgColor = new Color(200, 250, 255);
+
+ protected Set<DocumentListener> documentListeners;
+
+ /**
+ * The text value, which can be null
+ */
+ protected String text = null;
+
+ public JNullableTextField() {
+ initGui();
+ initListeners();
+ }
+
+ public void setText(String text) {
+ textField.setText(text);
+ this.text = text;
+ fireInsertUpdate(null);
+ }
+
+ public String getText() {
+ return text;
+ }
+
+ public void setColumns(int cols) {
+ textField.setColumns(cols);
+ }
+
+ protected void initGui() {
+ setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
+
+ textField = new JTextField();
+ add(textField);
+ add(Box.createHorizontalStrut(2));
+ nullifyButton = new JButton(new NullifyTextAction());
+// nullifyButton.setBorderPainted(true);
+// nullifyButton.setContentAreaFilled(false);
+// nullifyButton.setOpaque(false);
+// nullifyButton.setMargin(new Insets(2, 2, 2, 2));
+ add(nullifyButton);
+
+ normalBgColor = textField.getBackground();
+ // borrow the LnF from the text field
+// setBackground(textField.getBackground());
+// Border border = textField.getBorder();
+// textField.setBorder(null);
+// setBorder(border);
+ }
+
+ protected void initListeners() {
+ documentListeners = Collections.synchronizedSet(
+ new HashSet<DocumentListener>());
+
+ final DocumentListener tfDocumentListener = new DocumentListener() {
+ public void removeUpdate(DocumentEvent e) {
+ text = textField.getText();
+ fireRemoveUpdate(e);
+ }
+
+ public void insertUpdate(DocumentEvent e) {
+ text = textField.getText();
+ fireInsertUpdate(e);
+ }
+
+ public void changedUpdate(DocumentEvent e) {
+ fireChangedUpdate(e);
+ }
+ };
+
+ textField.getDocument().addDocumentListener(tfDocumentListener);
+
+ textField.addPropertyChangeListener("document", new
PropertyChangeListener() {
+ public void propertyChange(PropertyChangeEvent evt) {
+ textField.getDocument().addDocumentListener(tfDocumentListener);
+ }
+ });
+
+ // listen to our own events, and display null value
+ addDocumentListener(new DocumentListener() {
+ public void removeUpdate(DocumentEvent e) {
+ valueChanged();
+ }
+ public void insertUpdate(DocumentEvent e) {
+ valueChanged();
+ }
+
+ public void changedUpdate(DocumentEvent e) { }
+
+ private void valueChanged() {
+ if(getText() == null) {
+ textField.setBackground(nullBgColor);
+ } else {
+ textField.setBackground(normalBgColor);
+ }
+ }
+ });
+
+ }
+
+ public void addDocumentListener(DocumentListener listener) {
+ documentListeners.add(listener);
+ }
+
+ public void removeDocumentListener(DocumentListener listener) {
+ documentListeners.remove(listener);
+ }
+
+ protected void fireChangedUpdate(DocumentEvent e) {
+ for(DocumentListener aListener : documentListeners)
+ aListener.changedUpdate(e);
+ }
+
+ protected void fireInsertUpdate(DocumentEvent e) {
+ for(DocumentListener aListener : documentListeners)
+ aListener.insertUpdate(e);
+ }
+
+ protected void fireRemoveUpdate(DocumentEvent e) {
+ for(DocumentListener aListener : documentListeners)
+ aListener.removeUpdate(e);
+ }
+
+ public static void main(String[] args) {
+
+ JFrame frame = new JFrame(JNullableTextField.class.getName());
+
+ JPanel mainPanel = new JPanel(new BorderLayout());
+
+ final JNullableTextField textField = new JNullableTextField();
+ textField.setText("Test text");
+ mainPanel.add(textField, BorderLayout.CENTER);
+
+ final JLabel textLabel = new JLabel();
+ JButton getTextButton = new JButton(new AbstractAction("Copy text") {
+ public void actionPerformed(ActionEvent e) {
+ String text = textField.getText();
+ textLabel.setText(text == null ? "<null>" : text);
+ }
+ });
+
+ Box box = new Box(BoxLayout.X_AXIS);
+ box.add(getTextButton);
+ box.add(textLabel);
+ mainPanel.add(box, BorderLayout.SOUTH);
+
+ frame.add(mainPanel);
+ frame.setSize(400, 400);
+ frame.pack();
+ frame.setVisible(true);
+
+
+ }
+}
Property changes on: gate/trunk/src/gate/gui/annedit/JNullableTextField.java
___________________________________________________________________
Added: svn:keywords
+ Id
Added: svn:eol-style
+ native
Modified: gate/trunk/src/gate/gui/annedit/SchemaFeaturesEditor.java
===================================================================
--- gate/trunk/src/gate/gui/annedit/SchemaFeaturesEditor.java 2011-04-15
08:48:57 UTC (rev 13676)
+++ gate/trunk/src/gate/gui/annedit/SchemaFeaturesEditor.java 2011-04-15
13:04:29 UTC (rev 13677)
@@ -168,6 +168,7 @@
}
}
};
+
//build the empty shell
gui = new JPanel();
gui.setAlignmentX(Component.LEFT_ALIGNMENT);
@@ -211,15 +212,18 @@
// break;
case text:
gui.setLayout(new BoxLayout(gui, BoxLayout.LINE_AXIS));
- textField = new JTextField(20);
+ textField = new JNullableTextField();
+ textField.setColumns(20);
if(value != null){
textField.setText(value);
}else if(defaultValue != null){
textField.setText(defaultValue);
}
- textField.addActionListener(sharedActionListener);
- textField.getDocument().addDocumentListener(new DocumentListener(){
+ textField.addDocumentListener(new DocumentListener(){
public void changedUpdate(DocumentEvent e) {
+ sharedActionListener.actionPerformed(
+ new ActionEvent(textField, ActionEvent.ACTION_PERFORMED,
+ null));
}
public void insertUpdate(DocumentEvent e) {
sharedActionListener.actionPerformed(
@@ -241,7 +245,7 @@
gui.setBorder(defaultBorder);
}
- protected JTextField textField;
+ protected JNullableTextField textField;
protected JCheckBox checkbox;
protected JChoice jchoice;
@@ -337,6 +341,9 @@
* @param value
*/
public void setValue(String value) {
+ // cache the actually provided value: if the value is null, we need to
+ // know, as the text editor would return "" when asked rather than null
+ this.value = value;
switch(type){
case nominal:
jchoice.setSelectedItem(value);
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