1 files changed, 24 insertions, 0 deletions
diff --git a/jfr_playoff/gui/variables.py b/jfr_playoff/gui/variables.py
new file mode 100644
index 0000000..abb3cc1
--- /dev/null
+++ b/jfr_playoff/gui/variables.py
@@ -0,0 +1,24 @@
+#coding=utf-8
+
+import tkinter as tk
+
+class NotifyVar(tk.Variable):
+    def __init__(self, *args, **kwargs):
+        tk.Variable.__init__(self, *args, **kwargs)
+        self.trace('w', self._onChange)
+
+    def _onChange(self, *args):
+        self._root.event_generate('<<ValueChanged>>', when='tail')
+
+class NotifyStringVar(NotifyVar, tk.StringVar):
+    pass
+
+class NotifyIntVar(NotifyVar, tk.IntVar):
+    pass
+
+class NotifyNumericVar(NotifyStringVar):
+    def get(self, default=None):
+        try:
+            return int(str(NotifyStringVar.get(self)).strip())
+        except ValueError:
+            return default