Try to flicker less when redrawing lists

gui/chrome_tabs.py

@@ -1333,14 +1333,12 @@ class _TabsContainer(wx.Panel):
             if not self.preview_tab.GetSelected():
                 page = self.Parent.GetPage(self.GetTabIndex(self.preview_tab))
                 if page.Snapshot():
-
                     self.preview_wnd = PFNotebookPagePreview(
-                                                        self,
-                                                        (mposx + 3, mposy + 3),
-                                                        page.Snapshot(),
-                                                        self.preview_tab.text)
+                        self,
+                        (mposx + 3, mposy + 3),
+                        page.Snapshot(),
+                        self.preview_tab.text)
                     self.preview_wnd.Show()
-
         event.Skip()
 
 

gui/display.py

@@ -185,8 +185,10 @@ class Display(wx.ListCtrl):
             self.Select(row, True)
 
     def populate(self, stuff):
-
         if stuff is not None:
+            wasFrozen = self.IsFrozen()
+            if not wasFrozen:
+                self.Freeze()
             listItemCount = self.GetItemCount()
             stuffItemCount = len(stuff)
 
@@ -203,11 +205,15 @@ class Display(wx.ListCtrl):
                     for i in range(listItemCount - stuffItemCount):
                         self.DeleteItem(self.getLastItem())
                     self.Refresh()
+            if not wasFrozen:
+                self.Thaw()
 
     def refresh(self, stuff):
         if stuff is None:
             return
-
+        wasFrozen = self.IsFrozen()
+        if not wasFrozen:
+           self.Freeze()
         item = -1
         for id_, st in enumerate(stuff):
 
@@ -259,6 +265,8 @@ class Display(wx.ListCtrl):
                         self.SetColumnWidth(i, headerWidth)
                 else:
                     self.SetColumnWidth(i, col.size)
+        if not wasFrozen:
+            self.Thaw()
 
     def update(self, stuff):
         self.populate(stuff)

gui/errorDialog.py

@@ -48,6 +48,7 @@ class ErrorHandler:
                 app = wx.App(False)
                 cls.__frame = ErrorFrame(None)
                 cls.__frame.addException("".join(t))
+                cls.__frame.Show()
                 app.MainLoop()
                 sys.exit()
             else:
@@ -121,7 +122,5 @@ class ErrorFrame(AuxiliaryFrame):
 
         self.Centre(wx.BOTH)
 
-        self.Show()
-
     def addException(self, text):
         self.errorTextCtrl.AppendText("\n{}\n\n{}".format("#" * 20, text))