suggest file pattern on parser change

src/main/java/de/marhali/easyi18n/dialog/SettingsDialog.java

@@ -20,6 +20,8 @@ import de.marhali.easyi18n.service.SettingsService;
 
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
 import java.util.ResourceBundle;
 
 /**
@@ -101,6 +103,7 @@ public class SettingsDialog {
         parserStrategyComboBox = new ComboBox<>(bundle.getString("settings.strategy.parser").split(ArrayMapper.SPLITERATOR_REGEX));
         parserStrategyComboBox.setSelectedIndex(state.getParserStrategy().toIndex());
         parserStrategyComboBox.setToolTipText(bundle.getString("settings.strategy.parser.tooltip"));
+        parserStrategyComboBox.addItemListener(handleParserChange());
         constraints.fill = GridBagConstraints.HORIZONTAL;
         constraints.gridx = 1;
         constraints.gridy = 0;
@@ -157,4 +160,14 @@ public class SettingsDialog {
 
         return builder;
     }
+
+    private ItemListener handleParserChange() {
+        return e -> {
+          if(e.getStateChange() == ItemEvent.SELECTED) {
+              // Automatically suggest file pattern option on parser change
+              ParserStrategy newStrategy = ParserStrategy.fromIndex(parserStrategyComboBox.getSelectedIndex());
+              filePatternText.setText(newStrategy.getExampleFilePattern());
+          }
+        };
+    }
 }

src/main/java/de/marhali/easyi18n/model/bus/ParserStrategy.java

@@ -9,6 +9,10 @@ public enum ParserStrategy {
     YAML,
     PROPERTIES;
 
+    public String getExampleFilePattern() {
+        return "*." + toString().toLowerCase();
+    }
+
     public int toIndex() {
         int index = 0;