diff --git a/PPOCRLabel/PPOCRLabel.py b/PPOCRLabel/PPOCRLabel.py
index d93c4814cd..e3d47f4bd3 100644
--- a/PPOCRLabel/PPOCRLabel.py
+++ b/PPOCRLabel/PPOCRLabel.py
@@ -849,7 +849,7 @@ class MainWindow(QMainWindow):
 
         box = ast.literal_eval(item.text())
         # print('shape in labelItemChanged is',shape.points)
-        if box != [(p.x(), p.y()) for p in shape.points]:
+        if box != [(int(p.x()), int(p.y())) for p in shape.points]:
             # shape.points = box
             shape.points = [QPointF(p[0], p[1]) for p in box]
 
diff --git a/PPOCRLabel/libs/canvas.py b/PPOCRLabel/libs/canvas.py
index 6116f357d6..8d257e6bd7 100644
--- a/PPOCRLabel/libs/canvas.py
+++ b/PPOCRLabel/libs/canvas.py
@@ -11,19 +11,13 @@
 # CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-try:
-    from PyQt5.QtGui import *
-    from PyQt5.QtCore import *
-    from PyQt5.QtWidgets import *
-except ImportError:
-    from PyQt4.QtGui import *
-    from PyQt4.QtCore import *
-
-#from PyQt4.QtOpenGL import *
+import copy
 
+from PyQt5.QtCore import Qt, pyqtSignal, QPointF, QPoint
+from PyQt5.QtGui import QPainter, QBrush, QColor, QPixmap
+from PyQt5.QtWidgets import QWidget, QMenu, QApplication
 from libs.shape import Shape
 from libs.utils import distance
-import copy
 
 CURSOR_DEFAULT = Qt.ArrowCursor
 CURSOR_POINT = Qt.PointingHandCursor
@@ -31,8 +25,6 @@ CURSOR_DRAW = Qt.CrossCursor
 CURSOR_MOVE = Qt.ClosedHandCursor
 CURSOR_GRAB = Qt.OpenHandCursor
 
-# class Canvas(QGLWidget):
-
 
 class Canvas(QWidget):
     zoomRequest = pyqtSignal(int)
@@ -129,7 +121,6 @@ class Canvas(QWidget):
     def selectedVertex(self):
         return self.hVertex is not None
 
-
     def mouseMoveEvent(self, ev):
         """Update line with last point and current coordinates."""
         pos = self.transformPos(ev.pos())
@@ -333,7 +324,6 @@ class Canvas(QWidget):
 
              self.movingShape = False
 
-
     def endMove(self, copy=False):
         assert self.selectedShapes and self.selectedShapesCopy
         assert len(self.selectedShapesCopy) == len(self.selectedShapes)
@@ -410,7 +400,6 @@ class Canvas(QWidget):
         self.selectionChanged.emit(shapes)
         self.update()
 
-
     def selectShapePoint(self, point, multiple_selection_mode):
         """Select the first shape created which contains this point."""
         if self.selectedVertex():  # A vertex is marked for selection.
@@ -494,7 +483,6 @@ class Canvas(QWidget):
         else:
             shape.moveVertexBy(index, shiftPos)
 
-
     def boundedMoveShape(self, shapes, pos):
         if type(shapes).__name__ != 'list': shapes = [shapes]
         if self.outOfPixmap(pos):
@@ -515,6 +503,7 @@ class Canvas(QWidget):
         if dp:
             for shape in shapes:
                 shape.moveBy(dp)
+                shape.close()
             self.prevPoint = pos
             return True
         return False
@@ -728,6 +717,31 @@ class Canvas(QWidget):
              self.moveOnePixel('Up')
         elif key == Qt.Key_Down and self.selectedShapes:
              self.moveOnePixel('Down')
+        elif key == Qt.Key_X and self.selectedShapes:
+            for i in range(len(self.selectedShapes)):
+                self.selectedShape = self.selectedShapes[i]
+                if self.rotateOutOfBound(0.01):
+                    continue
+                self.selectedShape.rotate(0.01)
+            self.shapeMoved.emit()
+            self.update()
+
+        elif key == Qt.Key_C and self.selectedShapes:
+            for i in range(len(self.selectedShapes)):
+                self.selectedShape = self.selectedShapes[i]
+                if self.rotateOutOfBound(-0.01):
+                    continue
+                self.selectedShape.rotate(-0.01)
+            self.shapeMoved.emit()
+            self.update()
+
+    def rotateOutOfBound(self, angle):
+        for shape in range(len(self.selectedShapes)):
+            self.selectedShape = self.selectedShapes[shape]
+            for i, p in enumerate(self.selectedShape.points):
+                if self.outOfPixmap(self.selectedShape.rotatePoint(p, angle)):
+                    return True
+            return False
 
     def moveOnePixel(self, direction):
         # print(self.selectedShape.points)
diff --git a/PPOCRLabel/libs/shape.py b/PPOCRLabel/libs/shape.py
index e2cdcb3227..528b1102b0 100644
--- a/PPOCRLabel/libs/shape.py
+++ b/PPOCRLabel/libs/shape.py
@@ -10,20 +10,15 @@
 # SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 # CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
-#!/usr/bin/python
+# !/usr/bin/python
 # -*- coding: utf-8 -*-
-
-
-try:
-    from PyQt5.QtGui import *
-    from PyQt5.QtCore import *
-except ImportError:
-    from PyQt4.QtGui import *
-    from PyQt4.QtCore import *
-
-from libs.utils import distance
+import math
 import sys
 
+from PyQt5.QtCore import QPointF
+from PyQt5.QtGui import QColor, QPen, QPainterPath, QFont
+from libs.utils import distance
+
 DEFAULT_LINE_COLOR = QColor(0, 255, 0, 128)
 DEFAULT_FILL_COLOR = QColor(255, 0, 0, 128)
 DEFAULT_SELECT_LINE_COLOR = QColor(255, 255, 255)
@@ -59,6 +54,8 @@ class Shape(object):
         self.difficult = difficult
         self.paintLabel = paintLabel
         self.locked = False
+        self.direction = 0
+        self.center = None
         self._highlightIndex = None
         self._highlightMode = self.NEAR_VERTEX
         self._highlightSettings = {
@@ -74,7 +71,24 @@ class Shape(object):
             # is used for drawing the pending line a different color.
             self.line_color = line_color
 
+    def rotate(self, theta):
+        for i, p in enumerate(self.points):
+            self.points[i] = self.rotatePoint(p, theta)
+        self.direction -= theta
+        self.direction = self.direction % (2 * math.pi)
+
+    def rotatePoint(self, p, theta):
+        order = p - self.center
+        cosTheta = math.cos(theta)
+        sinTheta = math.sin(theta)
+        pResx = cosTheta * order.x() + sinTheta * order.y()
+        pResy = - sinTheta * order.x() + cosTheta * order.y()
+        pRes = QPointF(self.center.x() + pResx, self.center.y() + pResy)
+        return pRes
+
     def close(self):
+        self.center = QPointF((self.points[0].x() + self.points[2].x()) / 2,
+                              (self.points[0].y() + self.points[2].y()) / 2)
         self._closed = True
 
     def reachMaxPoints(self):
@@ -83,7 +97,9 @@ class Shape(object):
         return False
 
     def addPoint(self, point):
-        if not self.reachMaxPoints():  # 4个点时发出close信号
+        if self.reachMaxPoints():
+            self.close()
+        else:
             self.points.append(point)
 
     def popPoint(self):
@@ -112,7 +128,7 @@ class Shape(object):
             # Uncommenting the following line will draw 2 paths
             # for the 1st vertex, and make it non-filled, which
             # may be desirable.
-            #self.drawVertex(vrtx_path, 0)
+            # self.drawVertex(vrtx_path, 0)
 
             for i, p in enumerate(self.points):
                 line_path.lineTo(p)
@@ -136,9 +152,9 @@ class Shape(object):
                     font.setPointSize(8)
                     font.setBold(True)
                     painter.setFont(font)
-                    if(self.label == None):
+                    if self.label is None:
                         self.label = ""
-                    if(min_y < MIN_Y_LABEL):
+                    if min_y < MIN_Y_LABEL:
                         min_y += MIN_Y_LABEL
                     painter.drawText(min_x, min_y, self.label)
 
@@ -198,6 +214,8 @@ class Shape(object):
     def copy(self):
         shape = Shape("%s" % self.label)
         shape.points = [p for p in self.points]
+        shape.center = self.center
+        shape.direction = self.direction
         shape.fill = self.fill
         shape.selected = self.selected
         shape._closed = self._closed