fix Transformer bugs

src/shapes/Transformer.ts

@@ -30,8 +30,6 @@ var ATTR_CHANGE_LIST = [
 var NODE_RECT = 'nodeRect';
 
 var TRANSFORM_CHANGE_STR = [
-  'xChange.tr',
-  'yChange.tr',
   'widthChange.tr',
   'heightChange.tr',
   'scaleXChange.tr',
@@ -197,15 +195,15 @@ export class Transformer extends Group {
       .map(prop => prop + 'Change.tr')
       .join(' ');
 
-    const upChange = () => {
+    const onChange = () => {
       this._resetTransformCache();
       if (!this._transforming) {
         this.update();
       }
     };
-    node.on(additionalEvents, upChange);
-
-    node.on(TRANSFORM_CHANGE_STR, upChange);
+    node.on(additionalEvents, onChange);
+    node.on(TRANSFORM_CHANGE_STR, onChange);
+    node.on('xChange.tr yChange.tr', () => this._resetTransformCache());
     // we may need it if we set node in initial props
     // so elements are not defined yet
     var elementsCreated = !!this.findOne('.top-left');

test/unit/shapes/Transformer-test.js

@@ -1057,6 +1057,57 @@ suite('Transformer', function() {
     });
   });
 
+  test('check transformer with drag&drop and scaled shape', function() {
+    var stage = addStage();
+
+    var layer = new Konva.Layer();
+    stage.add(layer);
+
+    var rect = new Konva.Rect({
+      x: 0,
+      y: 0,
+      width: 100,
+      height: 100,
+      fill: 'green',
+      draggable: true,
+      scaleX: 2
+    });
+
+    layer.add(rect);
+
+    var tr = new Konva.Transformer({
+      node: rect
+    });
+    layer.add(tr);
+
+    layer.draw();
+
+    stage.simulateMouseDown({
+      x: 20,
+      y: 20
+    });
+
+    stage.simulateMouseMove({
+      x: 30,
+      y: 30
+    });
+
+    assert.equal(rect.x(), 10);
+    assert.equal(rect.y(), 10);
+
+    assert.equal(tr.x(), 10);
+    assert.equal(tr.y(), 10);
+
+    assert.equal(tr.width(), 200);
+
+    stage.simulateMouseUp({
+      x: 30,
+      y: 30
+    });
+
+    throw '1';
+  });
+
   test('on negative scaleY should move rotater', function() {
     var stage = addStage();
     var layer = new Konva.Layer();