Re: Little help with Getters, Setters and Native integration
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- Subject: Re: Little help with Getters, Setters and Native integration
- From: David Given <dg@...>
- Date: 2006年3月31日 15:33:24 +0100
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jdarling@eonclash.com wrote:
[...]
> If I have: GetWidth and SetWidth is their a way to have a table entry of
> Width that calls GetWidth and SetWidth automatically? I know I have to
> play with __index, but I can't seem to wrap my brain around it.
__index is called when reading from a non-existent table entry,
__newindex when writing to one. So you can use a metatable of:
{
__index = function(t, k)
if (k == "width") then
return GetWidth()
end
end,
__newindex = function(t, k, v)
if (k == "width") then
SetWidth(v)
end
end
}
You have to make sure never to set t.width, though, or these will never
get called.
- --
+- David Given --McQ-+
| dg@cowlark.com | "Those that repeat truisms, are also forced to
| (dg@tao-group.com) | repeat them." --- Anonymous from Slashdot
+- www.cowlark.com --+
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