Fix copying of download hash, GitHub issue #121

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -227,6 +227,15 @@ class MainFrameController {
         core.eventBus.publish( new TrustEvent(persona : p, level : TrustLevel.DISTRUSTED, reason : reason) )
     }
 
+    @ControllerAction
+    void copyDownloadHash() {
+        List<Downloader> downloaders = selectedDownloads()
+        if (downloaders.size() != 1)
+            return
+        def download = downloaders.first()
+        CopyPasteSupport.copyToClipboard(Base64.encode(download.getInfoHash().getRoot()))
+    }
+    
     @ControllerAction
     void cancel() {
         for (Downloader downloader : selectedDownloads()) {

gui/griffon-app/views/com/muwire/gui/MainFrameView.groovy

@@ -1556,14 +1556,12 @@ class MainFrameView {
         }
         
         JPopupMenu menu = new JPopupMenu()
-        JMenuItem copyHashToClipboard = new JMenuItem(trans("COPY_HASH_TO_CLIPBOARD"))
-        copyHashToClipboard.addActionListener({
-            String hash = Base64.encode(downloader.infoHash.getRoot())
-            StringSelection selection = new StringSelection(hash)
-            def clipboard = Toolkit.getDefaultToolkit().getSystemClipboard()
-            clipboard.setContents(selection, null)
-        })
-        menu.add(copyHashToClipboard)
+        
+        if (selected.length == 1) {
+            JMenuItem copyHashToClipboard = new JMenuItem(trans("COPY_HASH_TO_CLIPBOARD"))
+            copyHashToClipboard.addActionListener({ mvcGroup.controller.copyDownloadHash() })
+            menu.add(copyHashToClipboard)
+        }
 
         if (pauseEnabled) {
             JMenuItem pause = new JMenuItem(trans("PAUSE"))