From f14b5e3e41af68866edd706c9d48db61f3e0da4f Mon Sep 17 00:00:00 2001
From: Vincent Vinet <vince.vinet@gmail.com>
Date: Wed, 25 Mar 2009 18:26:30 +0000
Subject: Add the filters and treeview in the editor, and get_children in gtkutils

---
(limited to 'src/sugar/tutorius/gtkutils.py')

diff --git a/src/sugar/tutorius/gtkutils.py b/src/sugar/tutorius/gtkutils.py
index 1870dc4..bbd8863 100644
--- a/src/sugar/tutorius/gtkutils.py
+++ b/src/sugar/tutorius/gtkutils.py
@@ -47,13 +47,13 @@ def find_widget(base, target_fqdn):
 
     while len(path) > 0:
         try:
-            obj = obj.get_children()[int(path.pop(0))]
+            obj = get_children(obj)[int(path.pop(0))]
         except:
             break
 
     return obj
 
-EVENTS = [
+EVENTS = (
     "focus",
     "button-press-event",
     "enter-notify-event",
@@ -61,9 +61,9 @@ EVENTS = [
     "key-press-event",
     "text-selected",
     "clicked",
-]
+)
 
-IGNORED_WIDGETS = [
+IGNORED_WIDGETS = (
     "GtkVBox",
     "GtkHBox",
     "GtkAlignment",
@@ -71,9 +71,9 @@ IGNORED_WIDGETS = [
     "GtkButton",
     "GtkToolItem",
     "GtkToolbar",
-]
+)
 
-def register_signals_numbered(target, handler, prefix="0", max_depth=None):
+def register_signals_numbered(target, handler, prefix="0", max_depth=None, events=None):
     """
         Recursive function to register event handlers on an target
         and it's children. The event handler is called with an extra
@@ -96,25 +96,24 @@ def register_signals_numbered(target, handler, prefix="0", max_depth=None):
         @returns list of (object, handler_id)
     """
     ret = []
+    evts = events or EVENTS
     #Gtk Containers have a get_children() function
-    if hasattr(target, "get_children") and \
-        hasattr(target.get_children, "__call__"):
-        children = target.get_children()
-        for i in range(len(children)):
-            child = children[i]
-            if max_depth is None or max_depth > 0:
-                #Recurse with a prefix on all children
-                pre = ".".join( \
-                    [p for p in (prefix, str(i)) if not p is None]
-                )
-                if max_depth is None:
-                    dep = None
-                else:
-                    dep = max_depth - 1
-                ret+=register_signals_numbered(child, handler, pre, dep)
+    children = get_children(target)
+    for i in range(len(children)):
+        child = children[i]
+        if max_depth is None or max_depth > 0:
+            #Recurse with a prefix on all children
+            pre = ".".join( \
+                [p for p in (prefix, str(i)) if not p is None]
+            )
+            if max_depth is None:
+                dep = None
+            else:
+                dep = max_depth - 1
+            ret+=register_signals_numbered(child, handler, pre, dep, evts)
     #register events on the target if a widget XXX necessary to check this?
     if isinstance(target, gtk.Widget):
-        for sig in EVENTS:
+        for sig in evts:
             try:
                 ret.append( \
                     (target, target.connect(sig, handler, (sig, prefix) ))\
@@ -124,7 +123,7 @@ def register_signals_numbered(target, handler, prefix="0", max_depth=None):
 
     return ret
 
-def register_signals(target, handler, prefix=None, max_depth=None):
+def register_signals(target, handler, prefix=None, max_depth=None, events=None):
     """
         Recursive function to register event handlers on an target
         and it's children. The event handler is called with an extra
@@ -148,28 +147,27 @@ def register_signals(target, handler, prefix=None, max_depth=None):
         @returns list of (object, handler_id)
     """
     ret = []
+    evts = events or EVENTS
     #Gtk Containers have a get_children() function
-    if hasattr(target, "get_children") and \
-        hasattr(target.get_children, "__call__"):
-        for child in target.get_children():
-            if max_depth is None or max_depth > 0:
-                #Recurse with a prefix on all children
-                pre = ".".join( \
-                    [p for p in (prefix, target.get_name()) \
-                    if not (p is None or p in IGNORED_WIDGETS)] \
-                )
-                if max_depth is None:
-                    dep = None
-                else:
-                    dep = max_depth - 1
-                ret += register_signals(child, handler, pre, dep)
+    for child in get_children(target):
+        if max_depth is None or max_depth > 0:
+            #Recurse with a prefix on all children
+            pre = ".".join( \
+                [p for p in (prefix, target.get_name()) \
+                if not (p is None or p in IGNORED_WIDGETS)] \
+            )
+            if max_depth is None:
+                dep = None
+            else:
+                dep = max_depth - 1
+            ret += register_signals(child, handler, pre, dep, evts)
     name = ".".join( \
         [p for p in (prefix, target.get_name()) \
         if not (p is None or p in IGNORED_WIDGETS)] \
     )
     #register events on the target if a widget XXX necessary to check this?
     if isinstance(target, gtk.Widget):
-        for sig in EVENTS:
+        for sig in evts:
             try:
                 ret.append( \
                     (target, target.connect(sig, handler, (sig, name) )) \
@@ -179,3 +177,19 @@ def register_signals(target, handler, prefix=None, max_depth=None):
 
     return ret
     
+def get_children(widget):
+    """Lists widget's children"""
+    #widgets with multiple children
+    try:
+        return widget.get_children()
+    except (AttributeError,TypeError):
+        pass
+
+    #widgets with a single child
+    try:
+        return [widget.get_child(),]
+    except (AttributeError,TypeError):
+        pass
+
+    #otherwise return empty list
+    return []
--
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