它是带式图书馆的一部分:
(define InputMask
(_bitmask (NoEventMask = #x00000000
KeyPressMask = #x00000001
KeyReleaseMask = #x00000002
...
OwnerGrabButtonMask = #x01000000)
_long))
我必须说明,如何进入比特马克(或为此而设)的田地。 例如,我如何获得关键Press Mask的价值?
页: 1 添加这种类型是容易的:为了形成一种新的类型,你需要提供一种现有的类型,以充实和发挥两项职能——一种是翻译任何一种现有类型,另一种是翻译另一种方式。
现在,<代码>_bitmask 仅此类型——它以<代码>_int为基础。 (但就您的情况而言,它载于_long,而两个翻译职能将一个符号清单译成星体,并将一个星号转换成一个符号清单。 一旦使用这种编号,你就不必知道<代码>的价值。 KeyPressMask ——你刚刚知道你可以通过<代码>(KeyPressMask),作为<条码>输入外国功能,并将译成适当编号;你还知道,如果你从拥有<条码>的“InputMask输出的功能中获得结果价值,那么,它将成为一份可能包含<条码>的符号>的符号清单。 底线是,在计划一侧,你没有处理编号——只有文号清单。
如果你
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