Labels will be added to history and re-use it while showing pop window

labelImg.py

@@ -59,6 +59,7 @@ class MainWindow(QMainWindow, WindowMixin):
         # For loading all image under a directory
         self.mImgList = []
         self.dirname = None
+        self.labelHist = []
 
         # Whether we need to save or not.
         self.dirty = False
@@ -593,6 +594,9 @@ class MainWindow(QMainWindow, WindowMixin):
 
         position MUST be in global coordinates.
         """
+        if len(self.labelHist) > 0:
+            self.labelDialog = LabelDialog(parent=self, listItem=self.labelHist)
+
         text = self.labelDialog.popUp()
         if text is not None:
             self.addLabel(self.canvas.setLastLabel(text))
@@ -602,6 +606,10 @@ class MainWindow(QMainWindow, WindowMixin):
             else:
                 self.actions.editMode.setEnabled(True)
             self.setDirty()
+
+
+            if text not in self.labelHist:
+                self.labelHist.append(text)
         else:
             #self.canvas.undoLastLine()
             self.canvas.resetAllLines()
@@ -790,9 +798,12 @@ class MainWindow(QMainWindow, WindowMixin):
         self.mImgList = self.scanAllImages(dirpath)
         self.openNextImg()
 
+    def openPrevImg(self, _value=False):
+        if not self.mayContinue():
+            return
+
+
     def openNextImg(self, _value=False):
-        if self.dirty == True:
-            print 'dirty'
         if not self.mayContinue():
             return
         if len(self.mImgList) <= 0:

libs/labelDialog.py

@@ -7,7 +7,7 @@ BB = QDialogButtonBox
 
 class LabelDialog(QDialog):
 
-    def __init__(self, text="Enter object label", parent=None):
+    def __init__(self, text="Enter object label", parent=None, listItem=None):
         super(LabelDialog, self).__init__(parent)
         self.edit = QLineEdit()
         self.edit.setText(text)
@@ -21,6 +21,14 @@ class LabelDialog(QDialog):
         bb.accepted.connect(self.validate)
         bb.rejected.connect(self.reject)
         layout.addWidget(bb)
+
+        if listItem is not None and len(listItem) > 0:
+            self.listWidget = QListWidget(self)
+            for item in listItem:
+                self.listWidget.addItem(item)
+            self.listWidget.itemDoubleClicked.connect(self.listItemClick)
+            layout.addWidget(self.listWidget)
+
         self.setLayout(layout)
 
     def validate(self):
@@ -38,3 +46,6 @@ class LabelDialog(QDialog):
             self.move(QCursor.pos())
         return self.edit.text() if self.exec_() else None
 
+    def listItemClick(self, tQListWidgetItem):
+        text = tQListWidgetItem.text().trimmed()
+        self.edit.setText(text)