JuuS wrote:
On 07/27/2015 09:31 AM, Mark Morgan Lloyd wrote:
Péter Gábor wrote:
Sorry!
I was "misreading" your mail... you want to know the type of them.
You can compare the type of them:
if Sender = TButton then { do something} ;
Can this be elegantly put into a case statement?
Hi, I just tried it and no you can't. At least not directly, there may
be a way of casting the Sender object to ordinal or string but I'm not
sure that is efficient or elegant.
I didn't think there was, but thought it worth asking. My use case is
this sort of thing:
if MainForm.OutputComponent is TListBox then
with MainForm.ListBox1 do begin
Font.Name := fontName;
Font.Size := fontSize
end;
if MainForm.OutputComponent is TMemo then
with MainForm.Memo1 do begin
Font.Name := fontName;
Font.Size := fontSize
end;
...
Now obviously I could have a separate property holding an enumeration,
but it's a pity that it's not possible to do something like
case MainForm.OutputComponent of
TListBox: begin end;
TMemo: begin end;
...
otherwise
// Fatal exception since this is a serious programming error
end;
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
--
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