On 09/09/2013 16:34, Hans-Peter Diettrich wrote:
Ademir Constantino schrieb:
Dear all
I have noted something strange when I try to use a WMPaint event with
Manifest File for Windows theme support.
For example, If create a descendent class from TEdit and I add this
event:
procedure WMPaint (var Message: TLMPaint); message LM_PAINT;
Even I do not write anything in this procedure, I can not see what is
in the Edit when it it not focused (it is not in editing mode). That
is, if I focus on another component, the content of the edit stays
invisible (disapeare).
I'm not sure what you mean. In WMPaint you either have to show the
text yourself, or let it show by calling "inherited". If you don't
paint anything, the display will stay empty, of course.
But, if I disable the option "Use manifest file to enable themes",
then it work fine. Is it a bug?
Maybe, the native Windows controls often do not respect the
conventions. I have similar problems even without themes (W2K), where
my paint handler is only called in non-focused state. In focused state
the EDIT control seems to handle painting itself, ignoring all
eventually installed paint handlers.
DoDi
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Your are right.
Actually I was trying to use this event to do put the content on left
side (left justify)) when I am editing and put on right side (right
justify) when I exit it, but this does not worked as I was thinking.
I will try to discover other way.
Thanks
Ademir
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