Get the "handle number" of a standard handle class
1 次查看(过去 30 天)
显示 更早的评论
How can I ...
-Get the "handle number" (like the handle number returned when using hdgetset classes(ex : 203.0024)) of a myclass object which is of a "standard" handle class (myclass<handle)
-Store this "handle number" in a text variant
-And then retrieve my original object by this "handle number"
Thanks for you help!!! Gabriel
0 个评论
采纳的回答
Walter Roberson
2012-2-29
You can attach arbitrary (binary) data to a graphics object by setting its UserData property, or by using setappdata() on it.
0 个评论
更多回答(3 个)
Andrew Newell
2012-2-29
Setappdata seems best because of the limitations on using the UserData property (see How can I keep track of my GUI object handles?. You can store handles, as in the following example:
x = 1:10;
h = plot(x,x);
ha = @(x) x^2;
setappdata(h,'myHandle',ha)
f = getappdata(h,'myHandle');
f(2)
ans =
4
0 个评论
Daniel Shub
2012-2-29
You cannot do this directly. I don't understand why you would want to. Why not just pass the object around? MATLAB is pretty smart about memory management and doesn't make copies of handle object every time they are referenced.
If you really want to do it, you could subclass the handle class with something like myhandle. This new class could have a public property "h" which gets set at creation with a unique number. There are a number of ways that I can think of to keep track of the handle number to guarantee that they are unique. Then just make myclass<myhandle.
6 个评论
Walter Roberson
2012-2-29
Gabriel, object handles that are not handle graphics objects, do *not* have a representation of the kind you are seeking.
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Graphics Object Programming 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!