added callback util

kabuki/actor.py

@@ -1,5 +1,6 @@
 from .frame import Frame
 from .logic import decide_src_plt_cfg
+from .utils import cb, cb_dbg
 
 from .cfgdlgs import ConfigDialog1D, ConfigDialog2D #TODO
 
@@ -16,7 +17,7 @@ class Actor:
         self.cache = cache = src.cache.get_view()
 
         cfg.ti_cache_size.value = str(cache.size)
-        cfg.ti_cache_size.on_change("value", self.do_update_cache_size)
+        cfg.ti_cache_size.on_change("value", cb_dbg(self.do_update_cache_size))
 
         if isinstance(cfg, ConfigDialog1D): #TODO
             cfg.curves_latest.active = plt.line_latest.visible
@@ -32,17 +33,16 @@ class Actor:
         if isinstance(cfg, ConfigDialog2D): #TODO
             cfg.sel_cmap.value = plt.palette
 
-            cfg.sel_cmap.on_change("value", lambda _attr, _old, new: plt.change_cmap(new))
-            cfg.sp_vmin.on_change("value",  lambda _attr, _old, new: plt.change_vmin(new))
-            cfg.sp_vmax.on_change("value",  lambda _attr, _old, new: plt.change_vmax(new))
+            cfg.sel_cmap.on_change("value", cb(plt.change_cmap))
+            cfg.sp_vmin.on_change("value",  cb(plt.change_vmin))
+            cfg.sp_vmax.on_change("value",  cb(plt.change_vmax))
 
 
     def delete(self):
         self.cache = None
 
 
-    def do_update_cache_size(self, attr, old, new):
-        print(f"CB Update cache size: attribute \"{attr}\" changed from \"{old}\" to \"{new}\"")
+    def do_update_cache_size(self, new):
         self.cache.set_size(int(new))
         self.cfg.ti_cache_size.value = str(self.cache.size)
 

kabuki/utils.py

@@ -1,6 +1,22 @@
+from functools import partial
+
+
+def cb(handler):
+    def wrapper(attr, old, new):
+        handler(new)
+    return wrapper
+
+def cb_dbg(handler):
+    fn = handler.__name__
+    def wrapper(attr, old, new):
+        print(f"Callback {fn}: attribute \"{attr}\" changed from \"{old}\" to \"{new}\"")
+        handler(new)
+    return wrapper
+
 
 def adjust_margin(obj, top=0, right=0, bottom=0, left=0):
     delta = (top, right, bottom, left)
     obj.margin = [m + d for m, d in zip(obj.margin, delta)]
 
 
+