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# Copyright (C) 2001-2012, Parrot Foundation.
=head1 NAME
eventhandler.pir - a minesweeper event handler
=head1 SYNOPSIS
$P0 = new ['SDL'; 'Event']
$P1 = new "Mines::EventHandler"
$P0."process_events"( 0.1, $P1, field )
=head1 DESCRIPTION
This is a simple SDL event handler class.
=cut
.namespace ["Mines::EventHandler"]
.sub __onload :load
$P0 = get_class "Mines::EventHandler"
unless null $P0 goto END
newclass $P0, "Mines::EventHandler"
END:
.end
=head1 METHODS
=over 4
=item mouse_button_down( event, field )
Handles mouse click events.
Reveals a field or sets a flag.
=cut
.sub mouse_button_down :method
.param pmc event
.param pmc field
event = event.'event'( 'MouseButton' )
.local int state
.local int x
.local int y
state = event["state"]
# SDL_BUTTON_LEFT
if state != 1 goto DONE
x = event["x"]
y = event["y"]
$I0 = field."mark"( x, y )
if $I0 goto DONE
field."click"( x, y, 1 )
DONE:
.end
=item mouse_motion( event, field )
Handles mouse click events.
Reveals a field or sets a flag.
=cut
.sub mouse_motion :method
.param pmc event
.param pmc field
event = event.'event'( 'MouseMotion' )
.local int state
.local int x
.local int y
state = event["state"]
# SDL_BUTTON_LEFT
if state != 1 goto DONE
x = event["x"]
y = event["y"]
$I0 = field."mark"( x, y )
field."click"( x, y, 1 )
branch EXIT
DONE:
field."click"( x, y, 0 )
EXIT:
.end
=item mouse_button_up( event, field )
Handles mouse click events.
Reveals a field or sets a flag.
=cut
.sub mouse_button_up :method
.param pmc event
.param pmc field
event = event.'event'( 'MouseButton' )
.local int state
.local int x
.local int y
.local int ret
state = event["state"]
x = event["x"]
y = event["y"]
# SDL_BUTTON_LEFT
if state == 1 goto REVEAL
# SDL_BUTTON_RIGHT
if state == 3 goto SETFLAG
branch DONE
REVEAL:
ret = field."reveal"( x, y )
branch DONE
SETFLAG:
ret = field."setFlag"( x, y )
DONE:
if ret goto EXIT
field."click"( x, y, 0 )
EXIT:
.end
=back
=head1 AUTHOR
Jens Rieks E<lt>parrot at jensbeimsurfen dot deE<gt> is the author
and maintainer.
Please send patches and suggestions to the Perl 6 Internals mailing list.
=cut
# Local Variables:
# mode: pir
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4 ft=pir:
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