applets: add big_number

artiq/applets/big_number.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3.5
+
+from quamash import QtWidgets
+
+from artiq.applets.simple import SimpleApplet
+
+
+class NumberWidget(QtWidgets.QLCDNumber):
+    def __init__(self, args):
+        QtWidgets.QLCDNumber.__init__(self)
+        self.setDigitCount(args.digit_count)
+        self.dataset_name = args.dataset
+
+    def data_changed(self, data, mod):
+        try:
+            n = float(data[self.dataset_name][1])
+        except (KeyError, ValueError, TypeError):
+            n = "---"
+        self.display(n)
+
+
+def main():
+    applet = SimpleApplet(NumberWidget)
+    applet.add_dataset("dataset", "dataset to show")
+    applet.argparser.add_argument("--digit-count", type=int, default=10,
+                                  help="total number of digits to show")
+    applet.run()
+
+if __name__ == "__main__":
+    main()