undoable edits for normal component settings; TODO: merge small edits

1 files changed, 12 insertions, 0 deletions

diff --git a/src/toolkit/common.py b/src/toolkit/common.py
index eba57d9..51ad023 100644
--- a/src/toolkit/common.py
+++ b/src/toolkit/common.py
@@ -9,6 +9,18 @@ import subprocess
 from collections import OrderedDict
 
 
+class blockSignals:
+    '''A context manager to temporarily block a Qt widget from updating'''
+    def __init__(self, widget):
+        self.widget = widget
+
+    def __enter__(self):
+        self.widget.blockSignals(True)
+
+    def __exit__(self, *args):
+        self.widget.blockSignals(False)
+
+
 def badName(name):
     '''Returns whether a name contains non-alphanumeric chars'''
     return any([letter in string.punctuation for letter in name])