[python] realtimeplot: take alt_unit scale from drag'n drop

sw/ground_segment/python/real_time_plot/plotpanel.py

@@ -21,7 +21,7 @@ from pprz_msg import messages_xml_map
 
 
 class PlotData:
-    def __init__(self, ivy_msg_id, title, width, color=None):
+    def __init__(self, ivy_msg_id, title, width, color=None, scale=1.0):
         self.id = ivy_msg_id
         self.title = title
         self.SetPlotSize(width)
@@ -32,7 +32,7 @@ class PlotData:
         self.std_dev = 0.0
         self.real_time = False
 
-        self.scale = 1.0
+        self.scale = scale
         self.offset = 0.0
 
         if color is not None:
@@ -253,7 +253,7 @@ class PlotPanel(object):
 
     def OnDropText(self, data):
         [ac_id, category, message, field, scale] = data.encode('ASCII').split(':')
-        self.BindCurve(int(ac_id), message, field)
+        self.BindCurve(int(ac_id), message, field, scale=float(scale))
 
     def OnIvyMsg(self, agent, *larg):
         # print(larg[0])
@@ -282,7 +282,7 @@ class PlotPanel(object):
                 plot.index = self.x_axis.index
             plot.AddPoint(point, self.x_axis)
 
-    def BindCurve(self, ac_id, message, field, color=None, use_as_x=False):
+    def BindCurve(self, ac_id, message, field, color=None, use_as_x=False, scale=1.0):
         # -- add this telemetry to our list of things to plot ...
         message_string = _IVY_STRING % (ac_id, message)
         # print('Binding to %s' % message_string)
@@ -300,7 +300,7 @@ class PlotPanel(object):
 
         ivy_id = IvyBindMsg(self.OnIvyMsg, str(message_string))
         title = '%i:%s:%s' % (ac_id, message, field)
-        self.plots[ac_id][message][field] = PlotData(ivy_id, title, self.plot_size, color)
+        self.plots[ac_id][message][field] = PlotData(ivy_id, title, self.plot_size, color, scale)
         self.frame.AddCurve(ivy_id, title, use_as_x)
         if use_as_x:
             self.x_axis = self.plots[ac_id][message][field]