New functions like batch move, delete, withdraw with redundant codes

PPOCRLabel/PPOCRLabel.py

@@ -206,7 +206,7 @@ class MainWindow(QMainWindow, WindowMixin):
         self.labelList = EditInList()
         labelListContainer = QWidget()
         labelListContainer.setLayout(listLayout)
-        self.labelList.itemActivated.connect(self.labelSelectionChanged)
+        # self.labelList.itemActivated.connect(self.labelSelectionChanged)
         self.labelList.itemSelectionChanged.connect(self.labelSelectionChanged)
         self.labelList.clicked.connect(self.labelList.item_clicked)
         # Connect to itemChanged to detect checkbox changes.
@@ -444,7 +444,7 @@ class MainWindow(QMainWindow, WindowMixin):
                             'Ctrl+R', 'reRec', getStr('singleRe'), enabled=False)
 
         createpoly = action(getStr('creatPolygon'), self.createPolygon,
-                            'q', 'new', 'Creat Polygon', enabled=True)
+                            'q', 'new', getStr('creatPolygon'), enabled=True)
 
         saveRec = action(getStr('saveRec'), self.saveRecResult,
                             '', 'save', getStr('saveRec'), enabled=False)
@@ -452,6 +452,12 @@ class MainWindow(QMainWindow, WindowMixin):
         saveLabel = action(getStr('saveLabel'), self.saveLabelFile, #
                             'Ctrl+S', 'save', getStr('saveLabel'), enabled=False)
 
+        undoLastPoint = action(getStr("undoLastPoint"), self.canvas.undoLastPoint,
+                               'Ctrl+Z', "undo", "Undo last drawn point", enabled=False)
+
+        undo = action(getStr("undo"), self.undoShapeEdit,
+                      'Ctrl+Z', "undo", "Undo last add and edit of shape", enabled=False)
+
         self.editButton.setDefaultAction(edit)
         self.newButton.setDefaultAction(create)
         self.DelButton.setDefaultAction(deleteImg)
@@ -512,10 +518,11 @@ class MainWindow(QMainWindow, WindowMixin):
                               zoom=zoom, zoomIn=zoomIn, zoomOut=zoomOut, zoomOrg=zoomOrg,
                               fitWindow=fitWindow, fitWidth=fitWidth,
                               zoomActions=zoomActions, saveLabel=saveLabel,
+                              undo=undo, undoLastPoint=undoLastPoint,
                               fileMenuActions=(
                                   opendir, saveLabel,  resetAll, quit),
                               beginner=(), advanced=(),
-                              editMenu=(createpoly, edit, copy, delete,singleRere,
+                              editMenu=(createpoly, edit, copy, delete,singleRere,None, undo, undoLastPoint,
                                         None, color1, self.drawSquaresOption),
                               beginnerContext=(create, edit, copy, delete, singleRere),
                               advancedContext=(createMode, editMode, edit, copy,
@@ -549,8 +556,13 @@ class MainWindow(QMainWindow, WindowMixin):
         self.labelDialogOption.setChecked(settings.get(SETTING_PAINT_LABEL, False))
         self.labelDialogOption.triggered.connect(self.speedChoose)
 
+        self.autoSaveOption = QAction(getStr('autoSaveMode'), self)
+        self.autoSaveOption.setCheckable(True)
+        self.autoSaveOption.setChecked(settings.get(SETTING_PAINT_LABEL, False))
+        self.autoSaveOption.triggered.connect(self.autoSaveFunc)
+
         addActions(self.menus.file,
-                   (opendir, None, saveLabel, saveRec, None, resetAll, deleteImg, quit))
+                   (opendir, None, saveLabel, saveRec, self.autoSaveOption, None, resetAll, deleteImg, quit))
 
         addActions(self.menus.help, (showSteps, showInfo))
         addActions(self.menus.view, (
@@ -758,6 +770,7 @@ class MainWindow(QMainWindow, WindowMixin):
         self.canvas.setEditing(False)
         self.canvas.fourpoint = True
         self.actions.create.setEnabled(False)
+        self.actions.undoLastPoint.setEnabled(True)
 
     def toggleDrawingSensitive(self, drawing=True):
         """In the middle of drawing, toggling between modes should be disabled."""
@@ -865,11 +878,21 @@ class MainWindow(QMainWindow, WindowMixin):
             self.setDirty()
             self.updateComboBox()
 
+    # def updateBoxlist(self):
+    #     shape = self.canvas.selectedShape
+    #     item = self.shapesToItemsbox[shape]  # listitem
+    #     text = [(int(p.x()), int(p.y())) for p in shape.points]
+    #     item.setText(str(text))
+    #     self.setDirty()
+
     def updateBoxlist(self):
-        shape = self.canvas.selectedShape
+        #changedShape = self.canvas.selectedShapes
+        #changedShape.append(self.canvas.hShape) #changedShape: #
+        for shape in self.canvas.selectedShapes+[self.canvas.hShape]:
             item = self.shapesToItemsbox[shape]  # listitem
             text = [(int(p.x()), int(p.y())) for p in shape.points]
             item.setText(str(text))
+        self.actions.undo.setEnabled(True)
         self.setDirty()
 
     def indexTo5Files(self, currIndex):
@@ -902,23 +925,60 @@ class MainWindow(QMainWindow, WindowMixin):
         if len(self.mImgList) > 0:
             self.zoomWidget.setValue(self.zoomWidgetValue + self.imgsplider.value())
 
-    # React to canvas signals.
-    def shapeSelectionChanged(self, selected=False):
-        if self._noSelectionSlot:
-            self._noSelectionSlot = False
-        else:
-            shape = self.canvas.selectedShape
-            if shape:
-                self.shapesToItems[shape].setSelected(True)
-                self.shapesToItemsbox[shape].setSelected(True)  # ADD
-            else:
+    # # TODO: UPDATE THIS FUNCTION
+    # # React to canvas signals.
+    # def shapeSelectionChanged(self, selected=False):
+    #     if self._noSelectionSlot:
+    #         self._noSelectionSlot = False
+    #     else:
+    #         shape = self.canvas.selectedShape
+    #         if shape:
+    #             self.shapesToItems[shape].setSelected(True)
+    #             self.shapesToItemsbox[shape].setSelected(True)  # ADD
+    #         else:
+    #             self.labelList.clearSelection()
+    #     self.actions.delete.setEnabled(selected)
+    #     self.actions.copy.setEnabled(selected)
+    #     self.actions.edit.setEnabled(selected)
+    #     self.actions.shapeLineColor.setEnabled(selected)
+    #     self.actions.shapeFillColor.setEnabled(selected)
+    #     self.actions.singleRere.setEnabled(selected)
+
+    # def shapeSelectionChanged(self, selected_shapes):
+    #     if self._noSelectionSlot:
+    #         self._noSelectionSlot = False
+    #     else:
+    #         if self.canvas.selectedShapes:
+    #             for shape in self.canvas.selectedShapes:
+    #                 self.shapesToItems[shape].setSelected(True)
+    #                 self.shapesToItemsbox[shape].setSelected(True)
+    #         else:
+    #             self.labelList.clearSelection()
+    #
+    #     n_selected = len(selected_shapes)
+    #     self.actions.delete.setEnabled(n_selected)
+    #     self.actions.copy.setEnabled(n_selected)
+    #     self.actions.edit.setEnabled(n_selected == 1)
+
+    def shapeSelectionChanged(self, selected_shapes):
+        self._noSelectionSlot = True
+        for shape in self.canvas.selectedShapes: # 为何要反选?
+            shape.selected = False
         self.labelList.clearSelection()
-        self.actions.delete.setEnabled(selected)
-        self.actions.copy.setEnabled(selected)
-        self.actions.edit.setEnabled(selected)
-        self.actions.shapeLineColor.setEnabled(selected)
-        self.actions.shapeFillColor.setEnabled(selected)
-        self.actions.singleRere.setEnabled(selected)
+        self.canvas.selectedShapes = selected_shapes # 这里没有把选择的两个都加入
+        for shape in self.canvas.selectedShapes:
+            shape.selected = True
+            # item = self.labelList.findItemByShape(shape)
+            # self.labelList.selectItem(item)
+            # self.labelList.scrollToItem(item)
+            self.shapesToItems[shape].setSelected(True)
+            self.shapesToItemsbox[shape].setSelected(True)  # ADD 是否可以代替selectItem？
+
+        self._noSelectionSlot = False
+        n_selected = len(selected_shapes)
+        self.actions.delete.setEnabled(n_selected)
+        self.actions.copy.setEnabled(n_selected)
+        self.actions.edit.setEnabled(n_selected == 1)
 
     def addLabel(self, shape):
         shape.paintLabel = self.displayLabelOption.isChecked()
@@ -941,10 +1001,11 @@ class MainWindow(QMainWindow, WindowMixin):
             action.setEnabled(True)
         self.updateComboBox()
 
-    def remLabel(self, shape):
-        if shape is None:
+    def remLabels(self, shapes):
+        if shapes is None:
             # print('rm empty label')
             return
+        for shape in shapes:
             item = self.shapesToItems[shape]
             self.labelList.takeItem(self.labelList.row(item))
             del self.shapesToItems[shape]
@@ -1001,7 +1062,7 @@ class MainWindow(QMainWindow, WindowMixin):
         item.setText(str([(int(p.x()), int(p.y())) for p in shape.points]))
         self.updateComboBox()
 
-    def updateComboBox(self):
+    def updateComboBox(self): # TODO：貌似没用
         # Get the unique labels and add them to the Combobox.
         itemsTextList = [str(self.labelList.item(i).text()) for i in range(self.labelList.count())]
 
@@ -1059,21 +1120,47 @@ class MainWindow(QMainWindow, WindowMixin):
         self.shapeSelectionChanged(True)
 
 
+    # def labelSelectionChanged(self):
+    #     item = self.currentItem()
+    #     self.labelList.scrollToItem(item, QAbstractItemView.EnsureVisible)
+    #     if item and self.canvas.editing():
+    #         self._noSelectionSlot = True
+    #         self.canvas.selectShape(self.itemsToShapes[item])
+    #         shape = self.itemsToShapes[item]
+
     def labelSelectionChanged(self):
-        item = self.currentItem()
-        self.labelList.scrollToItem(item, QAbstractItemView.EnsureVisible)
-        if item and self.canvas.editing():
-            self._noSelectionSlot = True
-            self.canvas.selectShape(self.itemsToShapes[item])
-            shape = self.itemsToShapes[item]
+        if self._noSelectionSlot:
+            return
+        if self.canvas.editing():
+            selected_shapes = []
+            for item in self.labelList.selectedItems():
+                selected_shapes.append(self.itemsToShapes[item])
+            if selected_shapes:
+                self.canvas.selectShapes(selected_shapes)
+            else:
+                self.canvas.deSelectShape()
+
+
+    # def boxSelectionChanged(self):
+    #     item = self.currentBox()
+    #     self.BoxList.scrollToItem(item, QAbstractItemView.EnsureVisible)
+    #     if item and self.canvas.editing():
+    #         self._noSelectionSlot = True
+    #         self.canvas.selectShape(self.itemsToShapesbox[item])
+    #         shape = self.itemsToShapesbox[item]
 
     def boxSelectionChanged(self):
-        item = self.currentBox()
-        self.BoxList.scrollToItem(item, QAbstractItemView.EnsureVisible)
-        if item and self.canvas.editing():
-            self._noSelectionSlot = True
-            self.canvas.selectShape(self.itemsToShapesbox[item])
-            shape = self.itemsToShapesbox[item]
+        if self._noSelectionSlot:
+            return
+        if self.canvas.editing():
+            selected_shapes = []
+            for item in self.labelList.selectedItems():
+                selected_shapes.append(self.itemsToShapesbox[item])
+            if selected_shapes:
+                self.canvas.selectShapes(selected_shapes)
+            else:
+                self.canvas.deSelectShape()
+
 
     def labelItemChanged(self, item):
         shape = self.itemsToShapes[item]
@@ -1113,6 +1200,8 @@ class MainWindow(QMainWindow, WindowMixin):
             if self.beginner():  # Switch to edit mode.
                 self.canvas.setEditing(True)
                 self.actions.create.setEnabled(True)
+                self.actions.undoLastPoint.setEnabled(False)
+                self.actions.undo.setEnabled(True)
             else:
                 self.actions.editMode.setEnabled(True)
             self.setDirty()
@@ -1643,7 +1732,8 @@ class MainWindow(QMainWindow, WindowMixin):
             self.setDirty()
 
     def deleteSelectedShape(self):
-        self.remLabel(self.canvas.deleteSelected())
+        self.remLabels(self.canvas.deleteSelected())
+        self.actions.undo.setEnabled(True)
         self.setDirty()
         if self.noShapes():
             for action in self.actions.onShapesPresent:
@@ -1914,8 +2004,8 @@ class MainWindow(QMainWindow, WindowMixin):
         self.savePPlabel()
 
     def saveRecResult(self):
-        if None in [self.PPlabelpath, self.PPlabel, self.fileStatedict]:
-            QMessageBox.information(self, "Information", "Save file first")
+        if {} in [self.PPlabelpath, self.PPlabel, self.fileStatedict]:
+            QMessageBox.information(self, "Information", "Check the image first")
             return
 
         rec_gt_dir = os.path.dirname(self.PPlabelpath) + '/rec_gt.txt'
@@ -1953,6 +2043,29 @@ class MainWindow(QMainWindow, WindowMixin):
             self.canvas.newShape.disconnect()
             self.canvas.newShape.connect(partial(self.newShape, False))
 
+    def autoSaveFunc(self):
+        if self.autoSaveOption.isChecked():
+            self.autoSaveNum = 1 # Real auto_Save
+            print('The program will automatically save once after confirming an image')
+        else:
+            self.autoSaveNum = 5 # Used for backup
+            print('The program will automatically save once after confirming 5 images (default)')
+
+    def undoShapeEdit(self):
+        self.canvas.restoreShape()
+        self.labelList.clear()
+        self.BoxList.clear()
+        self.loadShapes(self.canvas.shapes) #  重新加载
+        self.actions.undo.setEnabled(self.canvas.isShapeRestorable)
+
+    def loadShapes(self, shapes, replace=True):
+        self._noSelectionSlot = True
+        for shape in shapes:
+            self.addLabel(shape)
+        self.labelList.clearSelection()
+        self._noSelectionSlot = False
+        self.canvas.loadShapes(shapes, replace=replace)
+
 
 def inverted(color):
     return QColor(*[255 - v for v in color.getRgb()])
@@ -1976,7 +2089,7 @@ def get_main_app(argv=[]):
     app.setWindowIcon(newIcon("app"))
     # Tzutalin 201705+: Accept extra agruments to change predefined class file
     argparser = argparse.ArgumentParser()
-    argparser.add_argument("--lang", default='en', nargs="?")
+    argparser.add_argument("--lang", default='ch', nargs="?")
     argparser.add_argument("--predefined_classes_file",
                            default=os.path.join(os.path.dirname(__file__), "data", "predefined_classes.txt"),
                            nargs="?")

PPOCRLabel/libs/canvas.py

@@ -37,7 +37,8 @@ class Canvas(QWidget):
     zoomRequest = pyqtSignal(int)
     scrollRequest = pyqtSignal(int, int)
     newShape = pyqtSignal()
-    selectionChanged = pyqtSignal(bool)
+    # selectionChanged = pyqtSignal(bool)
+    selectionChanged = pyqtSignal(list)
     shapeMoved = pyqtSignal()
     drawingPolygon = pyqtSignal(bool)
 
@@ -51,9 +52,11 @@ class Canvas(QWidget):
         # Initialise local state.
         self.mode = self.EDIT
         self.shapes = []
+        self.shapesBackups = []
         self.current = None
+        self.selectedShapes = []
         self.selectedShape = None  # save the selected shape here
-        self.selectedShapeCopy = None
+        self.selectedShapesCopy = []
         self.drawingLineColor = QColor(0, 0, 255)
         self.drawingRectColor = QColor(0, 0, 255)
         self.line = Shape(line_color=self.drawingLineColor)
@@ -77,6 +80,7 @@ class Canvas(QWidget):
         self.drawSquare = False
         self.fourpoint = True # ADD
         self.pointnum = 0
+        self.movingShape = False
 
         #initialisation for panning
         self.pan_initial_pos = QPoint()
@@ -149,37 +153,40 @@ class Canvas(QWidget):
                     clipped_x = min(max(0, pos.x()), size.width())
                     clipped_y = min(max(0, pos.y()), size.height())
                     pos = QPointF(clipped_x, clipped_y)
-                elif len(self.current) > 1 and self.closeEnough(pos, self.current[0]) and not self.fourpoint:
+
+                elif len(self.current) > 1 and self.closeEnough(pos, self.current[0]):# and not self.fourpoint:
                     # Attract line to starting point and colorise to alert the
                     # user:
                     pos = self.current[0]
                     color = self.current.line_color
                     self.overrideCursor(CURSOR_POINT)
                     self.current.highlightVertex(0, Shape.NEAR_VERTEX)
-                elif ( # ADD
-                        len(self.current) > 1
-                        and self.fourpoint
-                        and self.closeEnough(pos, self.current[0])
-                ):
-                    # Attract line to starting point and
-                    # colorise to alert the user.
-                    pos = self.current[0]
-                    self.overrideCursor(CURSOR_POINT)
-                    self.current.highlightVertex(0, Shape.NEAR_VERTEX)
-
-
-                if self.drawSquare:
-                    initPos = self.current[0]
-                    minX = initPos.x()
-                    minY = initPos.y()
-                    min_size = min(abs(pos.x() - minX), abs(pos.y() - minY))
-                    directionX = -1 if pos.x() - minX < 0 else 1
-                    directionY = -1 if pos.y() - minY < 0 else 1
-                    self.line[1] = QPointF(minX + directionX * min_size, minY + directionY * min_size)
+                # elif ( # ADD # 合并上下代码 内容一样
+                #         len(self.current) > 1
+                #         and self.fourpoint
+                #         and self.closeEnough(pos, self.current[0])
+                # ):
+                #     # Attract line to starting point and
+                #     # colorise to alert the user.
+                #     pos = self.current[0]
+                #     self.overrideCursor(CURSOR_POINT)
+                #     self.current.highlightVertex(0, Shape.NEAR_VERTEX)
+
+
+                if self.drawSquare: # 这部分不同
+                    # initPos = self.current[0] # 原先代码
+                    # minX = initPos.x()
+                    # minY = initPos.y()
+                    # min_size = min(abs(pos.x() - minX), abs(pos.y() - minY))
+                    # directionX = -1 if pos.x() - minX < 0 else 1
+                    # directionY = -1 if pos.y() - minY < 0 else 1
+                    # self.line[1] = QPointF(minX + directionX * min_size, minY + directionY * min_size)
+
+                    self.line.points = [self.current[0], pos] # Labelme代码
+                    self.line.close()
 
                 elif self.fourpoint:
                     # self.line[self.pointnum] = pos # OLD
-
                     self.line[0] = self.current[-1]
                     self.line[1] = pos
 
@@ -193,15 +200,17 @@ class Canvas(QWidget):
                 self.prevPoint = pos
             self.repaint()
             return
-
+        # 一下都相同
         # Polygon copy moving.
         if Qt.RightButton & ev.buttons():
-            if self.selectedShapeCopy and self.prevPoint:
+            if self.selectedShapesCopy and self.prevPoint:
                 self.overrideCursor(CURSOR_MOVE)
-                self.boundedMoveShape(self.selectedShapeCopy, pos)
+                self.boundedMoveShape(self.selectedShapesCopy, pos)
                 self.repaint()
-            elif self.selectedShape:
-                self.selectedShapeCopy = self.selectedShape.copy()
+            elif self.selectedShapes:
+                self.selectedShapesCopy = [
+                    s.copy() for s in self.selectedShapes
+                ]
                 self.repaint()
             return
 
@@ -209,14 +218,16 @@ class Canvas(QWidget):
         if Qt.LeftButton & ev.buttons():
             if self.selectedVertex():
                 self.boundedMoveVertex(pos)
-                self.shapeMoved.emit()
+                self.shapeMoved.emit() # 同时选中时的移动
                 self.repaint()
-            elif self.selectedShape and self.prevPoint:
+                self.movingShape = True
+            elif self.selectedShapes and self.prevPoint:
                 self.overrideCursor(CURSOR_MOVE)
-                self.boundedMoveShape(self.selectedShape, pos)
+                self.boundedMoveShape(self.selectedShapes, pos)
                 self.shapeMoved.emit()
                 self.repaint()
-            else:
+                self.movingShape = True
+            else: # TODO 这部分是多的
                 #pan
                 delta_x = pos.x() - self.pan_initial_pos.x()
                 delta_y = pos.y() - self.pan_initial_pos.y()
@@ -237,7 +248,8 @@ class Canvas(QWidget):
             if index is not None:
                 if self.selectedVertex():
                     self.hShape.highlightClear()
-                self.hVertex, self.hShape = index, shape
+                # TODO： Pre部分的变量都没有
+                self.hVertex, self.hShape = index, shape # 倒着来的原因是要更新hShape的值？
                 shape.highlightVertex(index, shape.MOVE_VERTEX)
                 self.overrideCursor(CURSOR_POINT)
                 self.setToolTip("Click & drag to move point")
@@ -263,23 +275,25 @@ class Canvas(QWidget):
 
     def mousePressEvent(self, ev):
         pos = self.transformPos(ev.pos())
-
         if ev.button() == Qt.LeftButton:
             if self.drawing():
                 # self.handleDrawing(pos) # OLD
-
-
-                if self.current and self.fourpoint: # ADD IF
+                if self.current:
+                    if self.fourpoint: # ADD IF
                         # Add point to existing shape.
-                    print('Adding points in mousePressEvent is ', self.line[1])
+                        # print('Adding points in mousePressEvent is ', self.line[1])
                         self.current.addPoint(self.line[1])
                         self.line[0] = self.current[-1]
                         if self.current.isClosed():
                             # print('1111')
                             self.finalise()
+                    elif self.drawSquare: # 增加
+                        assert len(self.current.points) == 1
+                        self.current.points = self.line.points
+                        self.finalise()
                 elif not self.outOfPixmap(pos):
                     # Create new shape.
-                    self.current = Shape()# self.current = Shape(shape_type=self.createMode)
+                    self.current = Shape()# self.current = Shape(shape_type=self.createMode) # TODO: 有可能需要制定类型？
                     self.current.addPoint(pos)
                     # if self.createMode == "point":
                     #     self.finalise()
@@ -291,69 +305,103 @@ class Canvas(QWidget):
                     self.drawingPolygon.emit(True)
                     self.update()
 
-
-            else:
-                selection = self.selectShapePoint(pos)
+            else: # 改动后可以增加多选框，选点方式从单点变成list
+                # selection = self.selectShapePoint(pos)
+                # self.prevPoint = pos
+                #
+                # if selection is None:
+                #     #pan
+                #     QApplication.setOverrideCursor(QCursor(Qt.OpenHandCursor))
+                #     self.pan_initial_pos = pos
+                group_mode = int(ev.modifiers()) == Qt.ControlModifier
+                self.selectShapePoint(pos, multiple_selection_mode=group_mode)
                 self.prevPoint = pos
-
-                if selection is None:
-                    #pan
-                    QApplication.setOverrideCursor(QCursor(Qt.OpenHandCursor))
                 self.pan_initial_pos = pos
+                # self.repaint()
 
         elif ev.button() == Qt.RightButton and self.editing():
-            self.selectShapePoint(pos)
+            # self.selectShapePoint(pos)
+            # self.prevPoint = pos
+            group_mode = int(ev.modifiers()) == Qt.ControlModifier
+            self.selectShapePoint(pos, multiple_selection_mode=group_mode)
             self.prevPoint = pos
+            # self.repaint() # 只用update？
         self.update()
 
     def mouseReleaseEvent(self, ev):
         if ev.button() == Qt.RightButton:
-            menu = self.menus[bool(self.selectedShapeCopy)]
+            menu = self.menus[bool(self.selectedShapesCopy)]
             self.restoreCursor()
             if not menu.exec_(self.mapToGlobal(ev.pos()))\
-               and self.selectedShapeCopy:
+               and self.selectedShapesCopy:
                 # Cancel the move by deleting the shadow copy.
-                self.selectedShapeCopy = None
+                # self.selectedShapeCopy = None
+                self.selectedShapesCopy = []
                 self.repaint()
-        elif ev.button() == Qt.LeftButton and self.selectedShape: # OLD
+        # elif ev.button() == Qt.LeftButton and self.selectedShape: # OLD
+        elif ev.button() == Qt.LeftButton and self.selectedShapes:
             if self.selectedVertex():
                 self.overrideCursor(CURSOR_POINT)
             else:
                 self.overrideCursor(CURSOR_GRAB)
 
-
-        elif ev.button() == Qt.LeftButton and not self.fourpoint:
+        elif ev.button() == Qt.LeftButton and not self.fourpoint: # 暂时去除四点部分的代码
             pos = self.transformPos(ev.pos())
             if self.drawing():
-                self.handleDrawing(pos)
+                self.handleDrawing(pos) # 关键函数
             else:
                 #pan
                 QApplication.restoreOverrideCursor() # ?
 
+        if self.movingShape and self.hShape: # 加上之后会移动点会崩 用于撤回
+             index = self.shapes.index(self.hShape)
+             if (
+                 self.shapesBackups[-1][index].points # 如果新建的框位置变化
+                 != self.shapes[index].points
+             ):
+                 self.storeShapes() # 重新backup一下
+                 self.shapeMoved.emit() # 连接updateBoxlist
+
+             self.movingShape = False
+
 
     def endMove(self, copy=False):
-        assert self.selectedShape and self.selectedShapeCopy
-        shape = self.selectedShapeCopy
+        # assert self.selectedShape and self.selectedShapeCopy
+        # shape = self.selectedShapeCopy
         #del shape.fill_color
         #del shape.line_color
+        # if copy:
+        #     self.shapes.append(shape)
+        #     self.selectedShape.selected = False
+        #     self.selectedShape = shape
+        #     self.repaint()
+        # else:
+        #     self.selectedShape.points = [p for p in shape.points]
+        # self.selectedShapeCopy = None
+        assert self.selectedShapes and self.selectedShapesCopy
+        assert len(self.selectedShapesCopy) == len(self.selectedShapes)
         if copy:
+            for i, shape in enumerate(self.selectedShapesCopy):
                 self.shapes.append(shape)
-            self.selectedShape.selected = False
-            self.selectedShape = shape
-            self.repaint()
+                self.selectedShapes[i].selected = False
+                self.selectedShapes[i] = shape
         else:
-            self.selectedShape.points = [p for p in shape.points]
-        self.selectedShapeCopy = None
+            for i, shape in enumerate(self.selectedShapesCopy):
+                self.selectedShapes[i].points = shape.points
+        self.selectedShapesCopy = []
+        self.repaint()
+        self.storeShapes()
+        return True
 
     def hideBackroundShapes(self, value):
         self.hideBackround = value
-        if self.selectedShape:
+        if self.selectedShapes:
             # Only hide other shapes if there is a current selection.
             # Otherwise the user will not be able to select a shape.
             self.setHiding(True)
             self.repaint()
 
-    def handleDrawing(self, pos):
+    def handleDrawing(self, pos): # 没有此函数
         if self.current and self.current.reachMaxPoints() is False:
             if self.fourpoint:
                 targetPos = self.line[self.pointnum]
@@ -399,28 +447,54 @@ class Canvas(QWidget):
                 self.current.popPoint()
             self.finalise()
 
-    def selectShape(self, shape):
-        self.deSelectShape()
-        shape.selected = True
-        self.selectedShape = shape
+    def selectShapes(self, shapes):
+        # self.deSelectShape()
+        # shape.selected = True
+        # self.selectedShape = shape
+        # self.setHiding()
+        # self.selectionChanged.emit(True)
+        # self.update()
+        for s in shapes: s.seleted = True
         self.setHiding()
-        self.selectionChanged.emit(True)
+        self.selectionChanged.emit(shapes)
         self.update()
 
-    def selectShapePoint(self, point):
+    # def selectShapePoint(self, point):
+    #     """Select the first shape created which contains this point."""
+    #     self.deSelectShape()
+    #     if self.selectedVertex():  # A vertex is marked for selection.
+    #         index, shape = self.hVertex, self.hShape
+    #         shape.highlightVertex(index, shape.MOVE_VERTEX)
+    #         self.selectShape(shape)
+    #         return self.hVertex
+    #     for shape in reversed(self.shapes):
+    #         if self.isVisible(shape) and shape.containsPoint(point):
+    #             self.selectShape(shape) # 函数
+    #             self.calculateOffsets(shape, point)
+    #             return self.selectedShape
+    #     return None
+
+    def selectShapePoint(self, point, multiple_selection_mode):
         """Select the first shape created which contains this point."""
-        self.deSelectShape()
         if self.selectedVertex():  # A vertex is marked for selection.
             index, shape = self.hVertex, self.hShape
-            shape.highlightVertex(index, shape.MOVE_VERTEX)
-            self.selectShape(shape)
+            shape.highlightVertex(index, shape.MOVE_VERTEX) # 突出显示
+
             return self.hVertex
+        else:
             for shape in reversed(self.shapes):
                 if self.isVisible(shape) and shape.containsPoint(point):
-                self.selectShape(shape)
                     self.calculateOffsets(shape, point)
-                return self.selectedShape
-        return None
+                    self.setHiding()
+                    if multiple_selection_mode:
+                        if shape not in self.selectedShapes: # list TODO:为什么是2个，刚开始应该是1个
+                            self.selectionChanged.emit(
+                                self.selectedShapes + [shape] # 选择+未选择
+                            )
+                    else:
+                        self.selectionChanged.emit([shape])
+                    return
+        self.deSelectShape()
 
     def calculateOffsets(self, shape, point):
         rect = shape.boundingRect()
@@ -465,8 +539,8 @@ class Canvas(QWidget):
         else:
             shiftPos = pos - point
 
+        if shape[0].x()==shape[3].x() and shape[1].x()==shape[2].x() and shape[0].y()==shape[1].y():
             shape.moveVertexBy(index, shiftPos)
-
             lindex = (index + 1) % 4
             rindex = (index + 3) % 4
             lshift = None
@@ -480,7 +554,11 @@ class Canvas(QWidget):
             shape.moveVertexBy(rindex, rshift)
             shape.moveVertexBy(lindex, lshift)
 
-    def boundedMoveShape(self, shape, pos):
+        else:
+            shape.moveVertexBy(index, shiftPos)
+
+
+    def boundedMoveShape(self, shapes, pos):
         if self.outOfPixmap(pos):
             return False  # No need to move
         o1 = pos + self.offsets[0]
@@ -497,36 +575,69 @@ class Canvas(QWidget):
         #self.calculateOffsets(self.selectedShape, pos)
         dp = pos - self.prevPoint
         if dp:
+            for shape in shapes:
                 shape.moveBy(dp)
             self.prevPoint = pos
             return True
         return False
 
     def deSelectShape(self):
-        if self.selectedShape:
-            self.selectedShape.selected = False
-            self.selectedShape = None
+        # if self.selectedShape:
+        #     self.selectedShape.selected = False
+        #     self.selectedShape = None
+        #     self.setHiding(False)
+        #     self.selectionChanged.emit(False)
+        #     self.update()
+        if self.selectedShapes:
+            # TODO：少了两个清空？
+            for shape in self.selectedShapes: shape.selected=False
             self.setHiding(False)
-            self.selectionChanged.emit(False)
+            self.selectionChanged.emit([])
             self.update()
 
+    # def deleteSelected(self):
+    #     if self.selectedShape:
+    #         shape = self.selectedShape
+    #         self.shapes.remove(self.selectedShape)
+    #         self.selectedShape = None
+    #         self.update()
+    #         return shape
+
     def deleteSelected(self):
-        if self.selectedShape:
-            shape = self.selectedShape
-            self.shapes.remove(self.selectedShape)
-            self.selectedShape = None
+        deleted_shapes = []
+        if self.selectedShapes:
+            #self.storeShapes()
+            for shape in self.selectedShapes:
+                self.shapes.remove(shape)
+                #self.shapesBackups.append(shape)
+                deleted_shapes.append(shape)
+            self.storeShapes() # 这里应该是先储存
+            self.selectedShapes = []
             self.update()
-            return shape
+        return deleted_shapes
+
+    def storeShapes(self):
+        shapesBackup = []
+        for shape in self.shapes:
+            shapesBackup.append(shape.copy())
+        if len(self.shapesBackups) >= 10:
+            self.shapesBackups = self.shapesBackups[-9:]
+        self.shapesBackups.append(shapesBackup) # 每删除或保存一次都会backup一次
 
     def copySelectedShape(self):
-        if self.selectedShape:
-            shape = self.selectedShape.copy()
-            self.deSelectShape()
-            self.shapes.append(shape)
-            shape.selected = True
-            self.selectedShape = shape
-            self.boundedShiftShape(shape)
-            return shape
+        # if self.selectedShape:
+        #     shape = self.selectedShape.copy()
+        #     self.deSelectShape()
+        #     self.shapes.append(shape)
+        #     shape.selected = True
+        #     self.selectedShape = shape
+        #     self.boundedShiftShape(shape)
+        #     return shape
+        if self.selectedShapes:
+            self.selectedShapesCopy = [s.copy() for s in self.selectedShapes]
+            self.boundedShiftShapes(self.selectedShapesCopy)
+            self.endMove(copy=True)
+        return self.selectedShapes
 
     def boundedShiftShape(self, shape):
         # Try to move in one direction, and if it fails in another.
@@ -560,8 +671,9 @@ class Canvas(QWidget):
         if self.current:
             self.current.paint(p)
             self.line.paint(p)
-        if self.selectedShapeCopy:
-            self.selectedShapeCopy.paint(p)
+        if self.selectedShapesCopy:
+            for s in self.selectedShapesCopy:
+                s.paint(p)
 
         # Paint rect
         if self.current is not None and len(self.line) == 2 and not self.fourpoint:
@@ -689,14 +801,14 @@ class Canvas(QWidget):
             self.update()
         elif key == Qt.Key_Return and self.canCloseShape():
             self.finalise()
-        elif key == Qt.Key_Left and self.selectedShape:
-            self.moveOnePixel('Left')
-        elif key == Qt.Key_Right and self.selectedShape:
-            self.moveOnePixel('Right')
-        elif key == Qt.Key_Up and self.selectedShape:
-            self.moveOnePixel('Up')
-        elif key == Qt.Key_Down and self.selectedShape:
-            self.moveOnePixel('Down')
+        # elif key == Qt.Key_Left and self.selectedShape:
+        #     self.moveOnePixel('Left')
+        # elif key == Qt.Key_Right and self.selectedShape:
+        #     self.moveOnePixel('Right')
+        # elif key == Qt.Key_Up and self.selectedShape:
+        #     self.moveOnePixel('Up')
+        # elif key == Qt.Key_Down and self.selectedShape:
+        #     self.moveOnePixel('Down')
 
     def moveOnePixel(self, direction):
         # print(self.selectedShape.points)
@@ -739,6 +851,8 @@ class Canvas(QWidget):
 
         if fill_color:
             self.shapes[-1].fill_color = fill_color
+        #self.shapesBackups.pop() # 新建shape后要pop?
+        self.storeShapes()
 
         return self.shapes[-1]
 
@@ -749,6 +863,17 @@ class Canvas(QWidget):
         self.line.points = [self.current[-1], self.current[0]]
         self.drawingPolygon.emit(True)
 
+    def undoLastPoint(self):
+        if not self.current or self.current.isClosed():
+            return
+        self.current.popPoint()
+        if len(self.current) > 0:
+            self.line[0] = self.current[-1]
+        else:
+            self.current = None
+            self.drawingPolygon.emit(False)
+        self.repaint()
+
     def resetAllLines(self):
         assert self.shapes
         self.current = self.shapes.pop()
@@ -762,11 +887,18 @@ class Canvas(QWidget):
     def loadPixmap(self, pixmap):
         self.pixmap = pixmap
         self.shapes = []
-        self.repaint() # 这函数在哪
+        self.repaint()
 
-    def loadShapes(self, shapes):
+    def loadShapes(self, shapes, replace=True):
+        if replace:
             self.shapes = list(shapes)
+        else:
+            self.shapes.extend(shapes)
         self.current = None
+        self.hShape = None
+        self.hVertex = None
+        # self.hEdge = None
+        self.storeShapes()
         self.repaint()
 
     def setShapeVisible(self, shape, value):
@@ -793,6 +925,25 @@ class Canvas(QWidget):
         self.restoreCursor()
         self.pixmap = None
         self.update()
+        self.shapesBackups = []
 
     def setDrawingShapeToSquare(self, status):
         self.drawSquare = status
+
+    def restoreShape(self): # 用于撤销
+        if not self.isShapeRestorable:
+            return
+        self.shapesBackups.pop()  # latest
+        shapesBackup = self.shapesBackups.pop()
+        self.shapes = shapesBackup
+        #self.shapes.append(self.shapesBackups.pop()) # 为何这里之前是只将back赋值呢
+        self.selectedShapes = []
+        for shape in self.shapes:
+            shape.selected = False
+        self.repaint()
+
+    @property
+    def isShapeRestorable(self):
+        if len(self.shapesBackups) < 2:
+            return False
+        return True
\ No newline at end of file

PPOCRLabel/libs/shape.py

@@ -82,7 +82,10 @@ class Shape(object):
         return False
 
     def addPoint(self, point):
-        if not self.reachMaxPoints():
+        if not self.reachMaxPoints():  # 4个点时发出close信号
+            if self.points and point == self.points[0]:
+                self.close()
+            else:
                 self.points.append(point)
 
     def popPoint(self):

PPOCRLabel/resources/strings/strings-zh-CN.properties

@@ -97,3 +97,6 @@ showBox=显示所有标注
 saveLabel=保存标记结果
 singleRe=重识别此区块
 labelDialogOption=弹出标记输入框
+undo=撤销
+undoLastPoint=撤销上个点
+autoSaveMode=自动保存标记结果
\ No newline at end of file

PPOCRLabel/resources/strings/strings.properties

@@ -97,3 +97,6 @@ showBox=Show All Box
 saveLabel=Save Label
 singleRe=Re-recognition RectBox
 labelDialogOption=Pop-up Label Input Dialog
+undo=Undo
+undoLastPoint=Undo Last Point
+autoSaveMode=Auto Save Label Mode
\ No newline at end of file