Save shape and zoom level to conf

src/painter.py

@@ -463,6 +463,14 @@ class Painter(Widget):
     # write configuration to file
     def write(self,file):
         ff=open(file,"w")
+        # save state (particle shape, zoom, lattice)
+        if self.shape==Cross:
+            ff.write("%shape=cross\n")
+        else:
+            ff.write("%shape=disk\n")
+        ff.write("%zoom={:1.1f}\n".format(self.base_size/50))
+        if self.lattice != None:
+            ff.write("%lattice="+self.lattice.type+':'+str(self.lattice.spacing)+"\n")
         for particle in self.particles:
             if type(particle)==Cross:
                 ff.write("{:d};".format(CROSS_INDEX))
@@ -502,6 +510,15 @@ class Painter(Widget):
             if len(line)==0:
                 continue
 
+            # read options
+            if line[0]=='%':
+                [key,val]=line[1:].split('=',1)
+                if key=="shape":
+                    self.app.command_prompt.run_set_shape(["set","shape",val])
+                elif key=="zoom":
+                    self.app.command_prompt.run_set_zoom(["set","zoom",val])
+                continue
+
             entries=line.split(";")
             # skip line if improperly formatted
             if len(entries)>3: