Fix zoom center button. Reverse disconnect wiggle.

core/block_svg.js

@@ -706,10 +706,8 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
         if (this_.parentBlock_) {
           // Push this block to the very top of the stack.
           this_.setParent(null);
-          if (workspace_.scale >= 1) {
           this_.disconnectUiEffect();
         }
-        }
         this_.setDragging_(true);
         workspace_.recordDeleteAreas();
       }
@@ -1097,7 +1095,9 @@ Blockly.BlockSvg.disposeUiStep_ = function(clone, rtl, start, workspaceScale) {
  */
 Blockly.BlockSvg.prototype.connectionUiEffect = function() {
   this.workspace.playAudio('click');
-
+  if (this.workspace.scale < 1) {
+    return;  // Too small to care about visual effects.
+  }
   // Determine the absolute coordinates of the inferior block.
   var xy = Blockly.getSvgXY_(/** @type {!Element} */ (this.svgGroup_),
                              this.workspace);
@@ -1144,12 +1144,15 @@ Blockly.BlockSvg.connectionUiStep_ = function(ripple, start, workspaceScale) {
  */
 Blockly.BlockSvg.prototype.disconnectUiEffect = function() {
   this.workspace.playAudio('disconnect');
+  if (this.workspace.scale < 1) {
+    return;  // Too small to care about visual effects.
+  }
   // Horizontal distance for bottom of block to wiggle.
   var DISPLACEMENT = 10;
   // Scale magnitude of skew to height of block.
   var height = this.getHeightWidth().height;
   var magnitude = Math.atan(DISPLACEMENT / height) / Math.PI * 180;
-  if (this.RTL) {
+  if (!this.RTL) {
     magnitude *= -1;
   }
   // Start the animation.

core/field.js

@@ -113,9 +113,10 @@ Blockly.Field.prototype.init = function(block) {
        'x': -Blockly.BlockSvg.SEP_SPACE_X / 2,
        'y': 0,
        'height': 16}, this.fieldGroup_, this.sourceBlock_.workspace);
-  /** @type {Element} */
+  /** @type {!Element} */
   this.textElement_ = Blockly.createSvgElement('text',
-      {'class': 'blocklyText', 'y': this.size_.height - 12.5}, this.fieldGroup_);
+      {'class': 'blocklyText', 'y': this.size_.height - 12.5},
+      this.fieldGroup_);
 
   this.updateEditable();
   block.getSvgRoot().appendChild(this.fieldGroup_);

core/workspace_svg.js

@@ -913,18 +913,26 @@ Blockly.WorkspaceSvg.prototype.zoomCenter = function(type) {
 
 /**
  * Reset zooming and dragging.
+ * @param {!Event} e Mouse down event.
  */
-Blockly.WorkspaceSvg.prototype.zoomReset = function() {
+Blockly.WorkspaceSvg.prototype.zoomReset = function(e) {
   this.scale = 1;
   this.updateGridPattern_();
-  var metrics = this.getMetrics();
-  this.scrollbar.set((metrics.contentWidth - metrics.viewWidth) / 2,
-                     (metrics.contentHeight - metrics.viewHeight) / 2);
   Blockly.hideChaff(false);
   if (this.flyout_) {
     // No toolbox, resize flyout.
     this.flyout_.reflow();
   }
+  // Center the workspace once the scaling has had a chance to take effect.
+  var thisWorkspace = this;
+  var scroll = function() {
+    var metrics = thisWorkspace.getMetrics();
+    thisWorkspace.scrollbar.set((metrics.contentWidth - metrics.viewWidth) / 2,
+        (metrics.contentHeight - metrics.viewHeight) / 2);
+  };
+  setTimeout(scroll, 0);
+  // This event has been handled.  No need to bubble up to the document.
+  e.stopPropagation();
 };
 
 /**

core/zoom_controls.js

@@ -163,11 +163,13 @@ Blockly.ZoomControls.prototype.createDom = function() {
 
   // Attach event listeners.
   Blockly.bindEvent_(zoomresetSvg, 'mousedown', workspace, workspace.zoomReset);
-  Blockly.bindEvent_(zoominSvg, 'mousedown', null, function() {
+  Blockly.bindEvent_(zoominSvg, 'mousedown', null, function(e) {
     workspace.zoomCenter(1);
+    e.stopPropagation();  // Don't start a workspace scroll.
   });
-  Blockly.bindEvent_(zoomoutSvg, 'mousedown', null, function() {
+  Blockly.bindEvent_(zoomoutSvg, 'mousedown', null, function(e) {
     workspace.zoomCenter(-1);
+    e.stopPropagation();  // Don't start a workspace scroll.
   });
 
   return this.svgGroup_;