1 files changed, 32 insertions, 0 deletions
diff --git a/jfr_playoff/gui/variables.py b/jfr_playoff/gui/variables.py
new file mode 100644
index 0000000..9dcbff2
--- /dev/null
+++ b/jfr_playoff/gui/variables.py
@@ -0,0 +1,32 @@
+#coding=utf-8
+
+import tkinter as tk
+
+class NotifyVar(tk.Variable):
+    def __init__(self, *args, **kwargs):
+        tk.Variable.__init__(self, *args, **kwargs)
+        self._prevValue = self.get()
+        self._root.after(0, self.trace, 'w', self._onChange)
+
+    def _onChange(self, *args):
+        if self._prevValue != self.get():
+            self._root.event_generate('<<ValueChanged>>', when='tail')
+        self._prevValue = self.get()
+
+class NumericVar(tk.StringVar):
+    def get(self, default=None):
+        try:
+            return int(str(tk.StringVar.get(self)).strip())
+        except ValueError:
+            return default
+
+class NotifyStringVar(NotifyVar, tk.StringVar):
+    pass
+
+class NotifyIntVar(NotifyVar, tk.IntVar):
+    pass
+
+class NotifyNumericVar(NumericVar, NotifyVar):
+    def __init__(self, *args, **kwargs):
+        NotifyVar.__init__(self, *args, **kwargs)
+        NumericVar.__init__(self, *args, **kwargs)