[bugfix] old usage of _parent

QtPyLoT.py

@@ -554,8 +554,8 @@ class MainWindow(QMainWindow):
         self.pg = pg
 
         # init style
-        self.set_style('dark')
-        #self.set_style('bright')
+        #self.set_style('dark')
+        self.set_style('bright')
         #self.set_style('default')
 
         # add event combo box and ref/test buttons

pylot/core/util/widgets.py

@@ -729,7 +729,7 @@ class PylotCanvas(FigureCanvas):
     def saveFigure(self):
         if self.figure:
             fd = QtGui.QFileDialog()
-            fname, filter = fd.getSaveFileName(self._parent, filter='Images (*.png)')
+            fname, filter = fd.getSaveFileName(self.parent(), filter='Images (*.png)')
             if not fname:
                 return
             if not fname.endswith('.png'):

pylot/styles/dark.qss

@@ -158,6 +158,11 @@ border-width:1px;
 padding:5px;
 }
 
+QTabBar::tab:disabled{
+background-color:qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:1, stop:0 rgba(70, 70, 80, 255), stop:1 rgba(60, 60, 70, 255));
+color: rgba(100, 100, 120, 255);
+}
+
 QTabWidget{
 background-color:transparent;
 }