1 files changed, 43 insertions, 0 deletions
diff --git a/PerlQt/tutorials/t8/CannonField.pm b/PerlQt/tutorials/t8/CannonField.pm
new file mode 100644
index 0000000..28e4986
--- /dev/null
+++ b/PerlQt/tutorials/t8/CannonField.pm
@@ -0,0 +1,43 @@
+package CannonField;
+use strict;
+use Qt;
+use Qt::isa qw(Qt::Widget);
+use Qt::signals
+	angleChanged => ['int'];
+use Qt::slots
+	setAngle => ['int'];
+use Qt::attributes qw(
+	ang
+);
+use POSIX qw(atan);
+
+sub angle () { ang }
+
+sub NEW {
+    shift->SUPER::NEW(@_);
+
+    ang = 45;
+    setPalette(Qt::Palette(Qt::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 = Qt::Painter(this);
+    $p->drawText(200, 200, $s);
+}
+
+sub sizePolicy {
+    Qt::SizePolicy(&Qt::SizePolicy::Expanding, &Qt::SizePolicy::Expanding);
+}
+
+1;