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libtqt-perl/PerlTQt/tutorials/t8/CannonField.pm

44 lines
762 B

package CannonField;
use strict;
use TQt;
use TQt::isa qw(TQt::Widget);
use TQt::signals
angleChanged => ['int'];
use TQt::slots
setAngle => ['int'];
use TQt::attributes qw(
ang
);
use POSIX qw(atan);
sub angle () { ang }
sub NEW {
shift->SUPER::NEW(@_);
ang = 45;
setPalette(TQt::Palette(TQt::Color(250, 250, 200)));
}
sub setAngle {
my $degrees = shift;
$degrees = 5 if $degrees < 5;
$degrees = 70 if $degrees > 70;
return if ang == $degrees;
ang = $degrees;
repaint();
emit angleChanged(ang);
}
sub paintEvent {
my $s = "Angle = " . ang;
my $p = TQt::Painter(this);
$p->drawText(200, 200, $s);
}
sub sizePolicy {
TQt::SizePolicy(&TQt::SizePolicy::Expanding, &TQt::SizePolicy::Expanding);
}
1;