Merge pull request #53 from karlduderstadt/master

Author: imagejan

src/main/java/org/scijava/ui/swing/widget/SwingChoiceWidget.java

@@ -31,6 +31,7 @@
 
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Arrays;
 
 import javax.swing.JComboBox;
 import javax.swing.JPanel;
@@ -67,7 +68,10 @@ public void actionPerformed(final ActionEvent e) {
 
 	@Override
 	public String getValue() {
-		return comboBox.getSelectedItem().toString();
+		if (comboBox.getItemCount() > 0)
+			return comboBox.getSelectedItem().toString();
+		else
+			return null;
 	}
 
 	// -- WrapperPlugin methods --
@@ -97,8 +101,24 @@ public boolean supports(final WidgetModel model) {
 
 	@Override
 	public void doRefresh() {
-		final Object value = get().getValue();
-		if (value.equals(comboBox.getSelectedItem())) return; // no change
-		comboBox.setSelectedItem(value);
+		final String[] choices = get().getChoices();
+		
+		if (!Arrays.equals(choices, comboBoxItems())) {
+			comboBox.removeAllItems();	
+			for (int i=0; i<choices.length; i++)
+				comboBox.addItem(choices[i]);
+		} else {
+			final Object value = get().getValue();
+			if (value.equals(comboBox.getSelectedItem())) return;
+			comboBox.setSelectedItem(value);
+		}
+	}
+	
+	private String[] comboBoxItems() {
+		String[] comboItems = new String[comboBox.getItemCount()];
+		for (int i=0; i <comboBox.getItemCount(); i++)
+			comboItems[i] = comboBox.getItemAt(i);
+		
+		return comboItems;
 	}
 }