Implement font increse/decrease with CTRL+MouseWheel

Author: facchinm

app/src/processing/app/EditorTab.java

@@ -30,6 +30,9 @@
 import java.awt.Font;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseWheelListener;
+import java.awt.event.MouseWheelEvent;
+
 import java.io.IOException;
 
 import javax.swing.Action;
@@ -64,7 +67,7 @@
 /**
  * Single tab, editing a single file, in the main window.
  */
-public class EditorTab extends JPanel implements SketchFile.TextStorage {
+public class EditorTab extends JPanel implements SketchFile.TextStorage, MouseWheelListener {
   protected Editor editor;
   protected SketchTextArea textarea;
   protected RTextScrollPane scrollPane;
@@ -106,6 +109,7 @@ public EditorTab(Editor editor, SketchFile file, String contents)
     file.setStorage(this);
     applyPreferences();
     add(scrollPane, BorderLayout.CENTER);
+	textarea.addMouseWheelListener(this);
   }
 
   private RSyntaxDocument createDocument(String contents) {
@@ -178,6 +182,18 @@ private SketchTextArea createTextArea(RSyntaxDocument document)
     return textArea;
   }
 
+  public void mouseWheelMoved(MouseWheelEvent e) {
+    if (e.isControlDown()) {
+      if (e.getWheelRotation() < 0) {
+        editor.base.handleFontSizeChange(1);
+      } else {
+        editor.base.handleFontSizeChange(-1);
+      }
+    } else {
+      e.getComponent().getParent().dispatchEvent(e);
+    }
+  }
+
   private void configurePopupMenu(final SketchTextArea textarea){
 
     JPopupMenu menu = textarea.getPopupMenu();