pad negative numbers in legend box

src/main/python/plot.py

@@ -30,31 +30,39 @@ def __plot(tup, datapoints, path, date1=None, date2=None, forcePath=False):
         ls = CFG("plot_line_style")
         tup[FIGURE],tup[AXIS] = plt.subplots(1, 1)
 
+        # generate datapoints #
+        tupelsToIterate = []
         for key in datapoints.keys():
-                g = datapoints[key]
-                print(key)
-                #### Check if we are supposed to plot something ####
-                if not g.plot:
-                        continue
-                #### GET AND CHECK TIMEFRAMES ####
-                x,y, = g.get_timeframe(tup[CALLBACK],date1,date2)
-                if not x or not y or len(x) <= 0 or len(y) <= 0:
-                    print("Warning: Empty series of data '%s' (wrong start/end time?)"%g.name)
-                    continue
-                else:
-                    NO_SERIES = False
-                    unix_x = [ el.timestamp() for el in x]
-                    ymin,ymax = plot_graphutils.getlimits_y(y)
+            g = datapoints[key]
+            if not g.plot:
+                continue
+            x,y, = g.get_timeframe(tup[CALLBACK],date1,date2)
+            tupelsToIterate += [(x, y, g)]
 
-                #### GET LINE STYLES ####
-                legend_label = plot_graphutils.legend_box_contents(g.name,y)
-                tup[AXIS].plot(unix_x, y,ls=ls,lw=lw,marker="None", label=legend_label, color=g.color)
+        # check for negative values (legend padding) #
+        anyValueNegative = False
+        for x, y, g in tupelsToIterate:
+            anyValueNegative = anyValueNegative or min(y) < 0
+
+        # plot #
+        for x, y, g in tupelsToIterate:
+            if not x or not y or len(x) <= 0 or len(y) <= 0:
+                print("Warning: Empty series of data '%s' (wrong start/end time?)"%g.name)
+                continue
+            else:
+                NO_SERIES = False
+                unix_x = [ el.timestamp() for el in x]
+                ymin,ymax = plot_graphutils.getlimits_y(y)
+
+                legend_label = plot_graphutils.legend_box_contents(g.name, y, anyValueNegative)
+                tup[AXIS].plot(unix_x, y, ls=ls, lw=lw, marker="None", 
+                                label=legend_label, color=g.color)
                 legacy_x_save = x
                 lagacy_y_save = y
         
         if NO_SERIES:
-                print("Error: no data, nothing to plot. cannot continue. exit.")
-                sys.exit(1)
+            print("Error: no data, nothing to plot. cannot continue. exit.")
+            sys.exit(1)
 
         ## GRID ##
         plot_graphutils.general_background_setup(tup, ymin, ymax, legacy_x_save)

src/main/python/plot_graphutils.py

@@ -31,24 +31,32 @@ def getlimits_y(y):
         
     return (ymin, ymax)
 
-def legend_box_contents(name, y):
+def legend_box_contents(name, y, anyValueNegative):
     '''Return a string with the formate content of the legend/caption'''
 
+    padding = 4
+    if anyValueNegative:
+        padding = 5
+
+    minFormatString = " min: {:" + str(padding) + ".1f},"
+    maxFormatString = " max: {:" + str(padding) + ".1f},"
+    avgFormatString = " Mittelwert: {:" + str(padding) + ".1f},"
+
     # capping values at 99 makes formating easier#
     if CFG("cap_values_at_99"):
         y = [ min( [el, 99.9] ) for el in y ]
     
     # add minimum values if configured #
     if CFG("show_min"):
-        name += " min: {:4.1f},".format(min(y))
+        name += minFormatString.format(min(y))
 
     # add maximum values if configured #
     if CFG("show_max"):
-        name += " max: {:4.1f},".format(max(y))
+        name += maxFormatString.format(max(y))
     
     # show average if configured #
     if CFG("show_avg"):
-        name += " Mittelwert: {:4.1f},".format(sum(y)/float(len(y)))
+        name += avgFormatString.format(sum(y)/float(len(y)))
     return name.rstrip(",")    
 
 def general_background_setup(tup,ymin,ymax,x):