bug fix for handling loading of dynamic params

[debian/gnuradio] / grc / base / Block.py

diff --git a/grc/base/Block.py b/grc/base/Block.py
index cb21c3958a2f0e3da1fb32025ec747e32528ad1e..43f9ba4e962b1b08a5790e523e9387b3d5f4d950 100644 (file)
--- a/grc/base/Block.py
+++ b/grc/base/Block.py
@@ -233,12 +233,22 @@ class Block(Element):
                """
                Import this block's params from nested data.
                Any param keys that do not exist will be ignored.
+               Since params can be dynamically created based another param,
+               call rewrite, and repeat the load until the params stick.
+               This call to rewrite will also create any dynamic ports
+               that are needed for the connections creation phase.
                @param n the nested data odict
                """
-               params_n = n.findall('param')
-               for param_n in params_n:
-                       key = param_n.find('key')
-                       value = param_n.find('value')
-                       #the key must exist in this block's params
-                       if key in self.get_param_keys():
-                               self.get_param(key).set_value(value)
+               get_hash = lambda: reduce(lambda x, y: x | y, [hash(param) for param in self.get_params()], 0)
+               my_hash = 0
+               while get_hash() != my_hash:
+                       params_n = n.findall('param')
+                       for param_n in params_n:
+                               key = param_n.find('key')
+                               value = param_n.find('value')
+                               #the key must exist in this block's params
+                               if key in self.get_param_keys():
+                                       self.get_param(key).set_value(value)
+                       #store hash and call rewrite
+                       my_hash = get_hash()
+                       self.rewrite()