moved MDISubWindow to separate file

grum/mdi/mdisubplot.py

@@ -1,27 +1,6 @@
-from PyQt5.QtCore import Qt
-from PyQt5.QtWidgets import QMdiSubWindow
 import pyqtgraph as pg
 
-from .. import assets
-
-
-class MDISubWindow(QMdiSubWindow):
-
-    def __init__(self, title, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.setWindowTitle(title)
-        self.setWindowIcon(assets.char())
-
-        # without this, the SubWindow is not removed from the subWindowList
-        self.setAttribute(Qt.WA_DeleteOnClose)
-
-
-    def frame_on(self):
-        self.setWindowFlag(Qt.FramelessWindowHint, False)
-
-    def frame_off(self):
-        self.setWindowFlag(Qt.FramelessWindowHint, True)
-
+from .mdisubwin import MDISubWindow
 
 
 class MDISubPlot(MDISubWindow):

grum/mdi/mdisubwin.py

@@ -0,0 +1,25 @@
+from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QMdiSubWindow
+
+from .. import assets
+
+
+class MDISubWindow(QMdiSubWindow):
+
+    def __init__(self, title, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.setWindowTitle(title)
+        self.setWindowIcon(assets.char())
+
+        # without this, the SubWindow is not removed from the subWindowList
+        self.setAttribute(Qt.WA_DeleteOnClose)
+
+
+    def frame_on(self):
+        self.setWindowFlag(Qt.FramelessWindowHint, False)
+
+    def frame_off(self):
+        self.setWindowFlag(Qt.FramelessWindowHint, True)
+
+
+