覆盖窗口关闭行为
覆盖窗口关闭行为
提问于 2011-09-12 09:50:39
我想要捕获关闭某些特定的现有Cocoa窗口的所有尝试，并添加一些自己的处理程序(这可能真的会关闭它或做一些不同的事情)。
我有不同的解决方案来做这件事。一个是：
我想在运行时用自己的close小部件替换现有Cocoa窗口的窗口关闭按钮，我可以在其中添加一些自己的代码。
现在，我有这样的代码：
import objc
_NSThemeCloseWidget = objc.lookUpClass("_NSThemeCloseWidget")
def find_close_widget(window):
contentView = window.contentView()
grayFrame = contentView.superview()
for i in range(len(grayFrame.subviews())):
v = grayFrame.subviews()[i]
if isinstance(v, _NSThemeCloseWidget):
return v, i, grayFrame
class CustomCloseWidget(_NSThemeCloseWidget):
pass
def replace_close_widget(window, clazz=CustomCloseWidget):
v, i, grayFrame = find_close_widget(window)
newv = clazz.alloc().init()
grayFrame.subviews()[i] = newv然而，这似乎不太正确。(它崩溃了。)
回答 2
Stack Overflow用户
回答已采纳
发布于 2011-09-14 22:26:46
我现在走另一条路线。这在一定程度上与Chrome有关，但也可以很容易地在其他地方采用。我想捕捉几个动作，以便尽可能早地关闭窗口，以避免任何其他导致窗口处于奇怪状态的清理。
def check_close_callback(obj):
# check ...
return True # or:
return False
import objc
BrowserWindowController = objc.lookUpClass("BrowserWindowController")
# copied from objc.signature to avoid warning
def my_signature(signature, **kw):
from objc._objc import selector
kw['signature'] = signature
def makeSignature(func):
return selector(func, **kw)
return makeSignature
windowWillCloseSig = "c12@0:4@8" # BrowserWindowController.windowWillClose_.signature
commandDispatchSig = "v12@0:4@8"
class BrowserWindowController(objc.Category(BrowserWindowController)):
@my_signature(windowWillCloseSig)
def myWindowShouldClose_(self, sender):
print "myWindowShouldClose", self, sender
if not check_close_callback(self): return objc.NO
return self.myWindowShouldClose_(sender) # this is no recursion when we exchanged the methods
@my_signature(commandDispatchSig)
def myCommandDispatch_(self, cmd):
try: print "myCommandDispatch_", self, cmd
except: pass # like <type 'exceptions.UnicodeEncodeError'>: 'ascii' codec can't encode character u'\u2026' in position 37: ordinal not in range(128)
if cmd.tag() == 34015: # IDC_CLOSE_TAB
if not check_close_callback(self): return
self.myCommandDispatch_(cmd)
from ctypes import *
capi = pythonapi
# id objc_getClass(const char *name)
capi.objc_getClass.restype = c_void_p
capi.objc_getClass.argtypes = [c_char_p]
# SEL sel_registerName(const char *str)
capi.sel_registerName.restype = c_void_p
capi.sel_registerName.argtypes = [c_char_p]
def capi_get_selector(name):
return c_void_p(capi.sel_registerName(name))
# Method class_getInstanceMethod(Class aClass, SEL aSelector)
# Will also search superclass for implementations.
capi.class_getInstanceMethod.restype = c_void_p
capi.class_getInstanceMethod.argtypes = [c_void_p, c_void_p]
# void method_exchangeImplementations(Method m1, Method m2)
capi.method_exchangeImplementations.restype = None
capi.method_exchangeImplementations.argtypes = [c_void_p, c_void_p]
def method_exchange(className, origSelName, newSelName):
clazz = capi.objc_getClass(className)
origMethod = capi.class_getInstanceMethod(clazz, capi_get_selector(origSelName))
newMethod = capi.class_getInstanceMethod(clazz, capi_get_selector(newSelName))
capi.method_exchangeImplementations(origMethod, newMethod)
def hook_into_windowShouldClose():
method_exchange("BrowserWindowController", "windowShouldClose:", "myWindowShouldClose:")
def hook_into_commandDispatch():
method_exchange("BrowserWindowController", "commandDispatch:", "myCommandDispatch:")Stack Overflow用户
发布于 2011-09-12 15:53:46
关闭小部件并不是关闭窗口的唯一方法。有一个公共API来获取小部件，所以你不需要浏览框架视图的子视图，但无论如何这都是错误的路径。
正确的方法是使一个对象成为窗口的代理，并在那里执行interfere with the window's closure。理想情况下，您应该在创建窗口和排序窗口之间设置窗口的委托。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/7382627
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