From c68684dda64340565b2218cbe7573f4cb1e7c1d6 Mon Sep 17 00:00:00 2001
From: Neil Fraser <fraser@google.com>
Date: Mon, 9 Jan 2017 22:55:17 -0800
Subject: [PATCH] Expand stack-drag modifier key to include alt and ctrl.

---
 core/block_svg.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/block_svg.js b/core/block_svg.js
index 95120a284..3cc1a59ac 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -954,7 +954,7 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
       var disconnectEffect = !!this.parentBlock_;
       // If in a stack, either split the stack, or pull out single block.
       var healStack = !Blockly.DRAG_STACK;
-      if (e.metaKey) {
+      if (e.altKey || e.ctrlKey || e.metaKey) {
         healStack = !healStack;
       }
       // Push this block to the very top of the stack.