From:	"Mars" <mars AT homemail DOT com>
Sender:	"Mars" <marsj AT 195 DOT 158 DOT 64 DOT 19>
Reply-To:	"Mars" <mars AT homemail DOT com>
Subject:	Help => OOP: Programming a mouselistener
Newsgroups:	comp.os.msdos.djgpp
NNTP-Posting-Host:	proxy.orbit.net.mt
Message-ID:	<36055909.0@news.orbit.net.mt>
Date:	20 Sep 1998 21:35:37 +0100
Lines:	16
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Having used Java this summer, I wish to write a MouseListener for C++.  The
buttons are objects derived from a basic class.  I have written another class
which contains these buttons, and given an x and y coordinate it checks to
see if any button registered with it falls onto these coordinates.  If it
does, appropriate action is taken. 

My problem is that I need to call this class whenever the user clicks the
mouse.  Using Allegro, you have to rewrite the mouse_callback function, which
is called during a mouse interrupt,  This entails the locking of all buttons
and classes which is not feasable.  Therefore, can anyone point for me some
information on how I can overcome this problem?  I would appreciate if someone
can give me a site where the algorithms of such programs are explained.

Thanks
Mars

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