allow opening of directory on launch

data/predefined_classes.txt

@@ -3,3 +3,13 @@ person
 cat
 tv
 car
+meatballs
+marinara sauce
+tomato soup
+chicken noodle soup
+french onion soup
+chicken breast
+ribs
+pulled pork
+hamburger
+cavity

labelImg.py

@@ -199,7 +199,7 @@ def __init__(self, defaultFilename=None, defaultPrefdefClassFile=None):
         # Tzutalin 20160906 : Add file list and dock to move faster
         self.addDockWidget(Qt.RightDockWidgetArea, self.filedock)
         self.filedock.setFeatures(QDockWidget.DockWidgetFloatable)
-        
+
         self.dockFeatures = QDockWidget.DockWidgetClosable | QDockWidget.DockWidgetFloatable
         self.dock.setFeatures(self.dock.features() ^ self.dockFeatures)
 
@@ -460,6 +460,10 @@ def xbool(x):
         self.labelCoordinates = QLabel('')
         self.statusBar().addPermanentWidget(self.labelCoordinates)
 
+        # Open Dir if deafult file
+        if self.filePath and os.path.isdir(self.filePath):
+            self.openDirDialog(dirpath=self.filePath)
+
     ## Support Functions ##
 
     def noShapes(self):
@@ -1081,20 +1085,20 @@ def openAnnotationDialog(self, _value=False):
                     filename = filename[0]
             self.loadPascalXMLByFilename(filename)
 
-    def openDirDialog(self, _value=False):
+    def openDirDialog(self, _value=False, dirpath=None):
         if not self.mayContinue():
             return
 
-        defaultOpenDirPath = '.'
+        defaultOpenDirPath = dirpath if dirpath else '.'
         if self.lastOpenDir and os.path.exists(self.lastOpenDir):
             defaultOpenDirPath = self.lastOpenDir
         else:
             defaultOpenDirPath = os.path.dirname(self.filePath) if self.filePath else '.'
 
-        dirpath = ustr(QFileDialog.getExistingDirectory(self,
+        targetDirPath = ustr(QFileDialog.getExistingDirectory(self,
                                                      '%s - Open Directory' % __appname__, defaultOpenDirPath,
                                                      QFileDialog.ShowDirsOnly | QFileDialog.DontResolveSymlinks))
-        self.importDirImages(dirpath)
+        self.importDirImages(targetDirPath)
 
     def importDirImages(self, dirpath):
         if not self.mayContinue() or not dirpath: