def data(self, index, role=Qt.DisplayRole):
if not index.isValid():
return None
attr_dict = self.header_list[index.column()] # 获取该列字段的配置
data_obj = index.internalPointer()
attr = attr_dict.get('key')
if role in SETTING_MAP.keys():
role_key = SETTING_MAP[role].get('config') # role 配置的关键字
formatter_from_config = attr_dict.get(role_key) # header中该role的配置
if not formatter_from_config and role not in [
Qt.DisplayRole, Qt.EditRole, Qt.ToolTipRole
]:
# 如果header中没有配置该role，而且也不是 DisplayRole/EditRole，直接返回None
return None
else:
value = apply_formatter(formatter_from_config,
get_obj_value(data_obj, attr),
data_obj)
formatter_from_model = SETTING_MAP[role].get('formatter',
None) # role 配置的转换函数
result = apply_formatter(formatter_from_model, value)
return result
if role == Qt.CheckStateRole and attr_dict.get('checkable', False):
state = get_obj_value(data_obj, attr + '_checked')
return Qt.Unchecked if state is None else state
return None
def test_apply_formatter(formatter, result, args, kwargs):
"""Test for apply_formatter with all situation."""
assert utils.apply_formatter(formatter, *args, **kwargs) == result