X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FPlatform.java;h=3fb384f0d7ef7b45e86f88aa2f74a1f0d5d857a7;hb=refs%2Fheads%2Freleases%2FRelease_2_10_0_Branch;hp=333aff4be282225b0a8092b8d847cc72c5aa7d24;hpb=ad15cff29620f960119f80176f1fd443da9f6763;p=jalview.git

diff --git a/src/jalview/util/Platform.java b/src/jalview/util/Platform.java
index 333aff4..3fb384f 100644
--- a/src/jalview/util/Platform.java
+++ b/src/jalview/util/Platform.java
@@ -20,6 +20,9 @@
  */
 package jalview.util;
 
+import java.awt.Toolkit;
+import java.awt.event.MouseEvent;
+
 /**
  * System platform information used by Applet and Application
  * 
@@ -32,13 +35,13 @@ public class Platform
    * 
    * @return true if we do things in a special way.
    */
-  public boolean isAMac()
+  public static boolean isAMac()
   {
     return java.lang.System.getProperty("os.name").indexOf("Mac") > -1;
 
   }
 
-  public boolean isHeadless()
+  public static boolean isHeadless()
   {
     String hdls = java.lang.System.getProperty("java.awt.headless");
 
@@ -74,4 +77,24 @@ public class Platform
     f.append(file.substring(lastp));
     return f.toString();
   }
+
+  /**
+   * Answers true if the mouse event has Meta-down (Command key on Mac) or
+   * Ctrl-down (on other o/s). Note this answers _false_ if the Ctrl key is
+   * pressed instead of the Meta/Cmd key on Mac. To test for Ctrl-click on Mac,
+   * you can use e.isPopupTrigger().
+   * 
+   * @param e
+   * @return
+   */
+  public static boolean isControlDown(MouseEvent e)
+  {
+    if (isAMac())
+    {
+      return (Toolkit.getDefaultToolkit().getMenuShortcutKeyMask() & e
+              .getModifiers()) != 0;
+      // could we use e.isMetaDown() here?
+    }
+    return e.isControlDown();
+  }
 }