applets: add progress bar applet

Signed-off-by: Suthep Pomjaksilp <pomjaksi@physik.uni-kl.de>

artiq/applets/progress_bar.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+from PyQt5 import QtWidgets
+
+from artiq.applets.simple import SimpleApplet
+
+
+class ProgressWidget(QtWidgets.QProgressBar):
+    def __init__(self, args):
+        QtWidgets.QProgressBar.__init__(self)
+        self.setMinimum(args.min)
+        self.setMaximum(args.max)
+        self.dataset_value = args.value
+
+    def data_changed(self, data, mods):
+        try:
+            value = round(data[self.dataset_value][1])
+        except (KeyError, ValueError, TypeError):
+            value = 0
+        self.setValue(value)
+
+
+
+def main():
+    applet = SimpleApplet(ProgressWidget)
+    applet.add_dataset("value", "counter")
+    applet.argparser.add_argument("--min", type=int, default=0,
+                                  help="minimum (left) value of the bar")
+    applet.argparser.add_argument("--max", type=int, default=100,
+                                  help="maximum (right) value of the bar")
+    applet.run()
+
+if __name__ == "__main__":
+    main()

artiq/gui/applets.py

@@ -225,6 +225,7 @@ _templates = [
                        "HIST_BIN_BOUNDARIES_DATASET "
                        "HISTS_COUNTS_DATASET"),
     ("Image", "${artiq_applet}image IMG_DATASET"),
+    ("Progress bar", "${artiq_applet}progress_bar VALUE"),
 ]