Merge pull request #454 from MikeTheWatchGuy/Dev-latest

Dev latest

Demo_Window_Disappear.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+layout = [[ sg.Text('My Window') ],
+          [ sg.RButton('Disappear')]]
+
+window = sg.Window('My window').Layout(layout)
+
+while True:
+    button, value = window.Read()
+    if button is None:
+        break
+    if button == 'Disappear':
+        window.Disapper()
+        sg.Popup('Click OK to make window reappear')
+        window.Reappear()
+

PySimpleGUI.py

@@ -2677,6 +2677,11 @@ class Window:
     def UnHide(self):
         self.TKroot.deiconify()
 
+    def Disapper(self):
+        self.TKroot.attributes('-alpha', 0)
+
+    def Reappear(self):
+        self.TKroot.attributes('-alpha', 255)
 
     def __enter__(self):
         return self