在MATLAB中,类方法可以在不公开的情况下充当uicontrol回调吗?
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01-07-2019 - |
题
在MATLAB 2008a中,有没有办法允许类方法充当uicontrol回调函数而不必公开该方法?从概念上讲,该方法不应该是公共的,因为它永远不应该由类的用户调用。它只应该由于触发回调的UI事件而被调用。但是,如果我将方法的访问权限设置为private或protected,则回调不起作用。我的类派生自hgsetget,使用2008a classdef语法定义。
uicontrol代码类似于:
methods (Access = public)
function this = MyClass(args)
this.someClassProperty = uicontrol(property1, value1, ... , 'Callback', ...
{@(src, event)myCallbackMethod(this, src, event)});
% the rest of the class constructor code
end
end
回调代码如下:
methods (Access = private) % This doesn't work because it's private
% It works just fine if I make it public instead, but that's wrong conceptually.
function myCallbackMethod(this, src, event)
% do something
end
end
解决方案
将回调函数句柄存储为私有属性似乎解决了这个问题。试试这个:
classdef MyClass
properties
handle;
end
properties (Access=private)
callback;
end
methods
function this = MyClass(args)
this.callback = @myCallbackMethod;
this.handle = uicontrol('Callback', ...
{@(src, event)myCallbackMethod(this, src, event)});
end
end
methods (Access = private)
function myCallbackMethod(this, src, event)
disp('Hello world!');
end
end
end
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