在PySide中,我可以使用values
属性获取包含可能/允许的枚举器值及其字符串表示的字典。例如:
QtWidgets.QMessageBox.StandardButton.values.items()
。如何在PyQt4 / PyQt5中实现相同的功能?这甚至可能吗?我在文档中没有发现任何相关内容。
答案 0 :(得分:1)
PySide有一个内置的枚举类型(Shiboken.EnumType
),支持对名称/值进行迭代。它还支持name
属性,您可以使用该属性直接从其值中获取枚举器名称。
不幸的是,PyQt从未拥有过这些功能,所以你必须推出自己的解决方案。使用QMetaType
进行此操作很诱人,但有些课程没有必要staticMetaObject
。特别是,Qt
命名空间没有一个,它使用QMetaType
排除了很大一组枚举。
因此,更通用的解决方案是使用python的dir
函数来构建双向映射,如下所示:
def enum_mapping(cls, enum):
mapping = {}
for key in dir(cls):
value = getattr(cls, key)
if isinstance(value, enum):
mapping[key] = value
mapping[value] = key
return mapping
enum = enum_mapping(QMessageBox, QMessageBox.StandardButton)
print('Ok = %s' % enum['Ok'])
print('QMessageBox.Ok = %s' % enum[QMessageBox.Ok])
print('1024 = %s' % enum[1024])
print()
for item in sorted(enum.items(), key=str):
print('%s = %s' % item)
输出:
Ok = 1024
QMessageBox.Ok = Ok
1024 = Ok
Abort = 262144
Apply = 33554432
ButtonMask = -769
Cancel = 4194304
Close = 2097152
Default = 256
Discard = 8388608
Escape = 512
FirstButton = 1024
FlagMask = 768
Help = 16777216
Ignore = 1048576
LastButton = 134217728
No = 65536
NoAll = 131072
NoButton = 0
NoToAll = 131072
Ok = 1024
Open = 8192
Reset = 67108864
RestoreDefaults = 134217728
Retry = 524288
Save = 2048
SaveAll = 4096
Yes = 16384
YesAll = 32768
YesToAll = 32768
-769 = ButtonMask
0 = NoButton
1024 = Ok
1048576 = Ignore
131072 = NoToAll
134217728 = RestoreDefaults
16384 = Yes
16777216 = Help
2048 = Save
2097152 = Close
256 = Default
262144 = Abort
32768 = YesToAll
33554432 = Apply
4096 = SaveAll
4194304 = Cancel
512 = Escape
524288 = Retry
65536 = No
67108864 = Reset
768 = FlagMask
8192 = Open
8388608 = Discard