aboutsummaryrefslogtreecommitdiffstats
path: root/src/pyexiv2.py
diff options
context:
space:
mode:
Diffstat (limited to 'src/pyexiv2.py')
-rw-r--r--src/pyexiv2.py41
1 files changed, 37 insertions, 4 deletions
diff --git a/src/pyexiv2.py b/src/pyexiv2.py
index 0bd180e..6b6ed69 100644
--- a/src/pyexiv2.py
+++ b/src/pyexiv2.py
@@ -468,7 +468,7 @@ class ExifValueError(ValueError):
(self.type, self.value)
-class ExifTag(MetadataTag):
+class ExifTag(MetadataTag, ListenerInterface):
"""
An EXIF metadata tag.
@@ -501,7 +501,10 @@ class ExifTag(MetadataTag):
# May contain multiple values
values = self.raw_value.split()
if len(values) > 1:
- self._value = map(self._convert_to_python, values)
+ # Make values a notifying list
+ values = map(self._convert_to_python, values)
+ self._value = NotifyingList(values)
+ self._value.register_listener(self)
return
self._value = self._convert_to_python(self.raw_value)
@@ -510,19 +513,49 @@ class ExifTag(MetadataTag):
def _set_value(self, new_value):
if self.metadata is not None:
- raw_value = self._convert_to_string(new_value)
+ if isinstance(new_value, (list, tuple)):
+ raw_values = map(self._convert_to_string, new_value)
+ raw_value = ' '.join(raw_values)
+ else:
+ raw_value = self._convert_to_string(new_value)
self.metadata._set_exif_tag_value(self.key, raw_value)
- self._value = new_value
+
+ if isinstance(self._value, NotifyingList):
+ self._value.unregister_listener(self)
+
+ if isinstance(new_value, NotifyingList):
+ # Already a notifying list
+ self._value = new_value
+ self._value.register_listener(self)
+ elif isinstance(new_value, (list, tuple)):
+ # Make the values a notifying list
+ self._value = NotifyingList(new_value)
+ self._value.register_listener(self)
+ else:
+ # Single value
+ self._value = new_value
def _del_value(self):
if self.metadata is not None:
self.metadata._delete_exif_tag(self.key)
+
+ if isinstance(self._value, NotifyingList):
+ self._value.unregister_listener(self)
+
del self._value
"""the value of the tag converted to its corresponding python type"""
value = property(fget=_get_value, fset=_set_value, fdel=_del_value,
doc=None)
+ def contents_changed(self):
+ """
+ Implementation of the L{ListenerInterface}.
+ React on changes to the list of values of the tag.
+ """
+ # self._value is a list of value and its contents changed.
+ self._set_value(self._value)
+
def _convert_to_python(self, value):
"""
Convert one raw value to its corresponding python type.