1 files changed, 76 insertions, 0 deletions
diff --git a/PerlTQt/tutorials/t10/CannonField.pm b/PerlTQt/tutorials/t10/CannonField.pm
new file mode 100644
index 0000000..08b2e10
--- /dev/null
+++ b/PerlTQt/tutorials/t10/CannonField.pm
@@ -0,0 +1,76 @@
+package CannonField;
+use strict;
+use TQt;
+use TQt::isa qw(TQt::Widget);
+use TQt::signals
+	angleChanged => ['int'],
+	forceChanged => ['int'];
+use TQt::slots
+	setAngle => ['int'],
+	setForce => ['int'];
+use TQt::attributes qw(
+	ang
+	f
+);
+use POSIX qw(atan);
+
+sub angle () { ang }
+sub force () { f }
+
+sub NEW {
+    shift->SUPER::NEW(@_);
+
+    ang = 45;
+    f = 0;
+    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(cannonRect(), 0);
+    emit angleChanged(ang);
+}
+
+sub setForce {
+    my $newton = shift;
+    $newton = 0 if $newton < 0;
+    return if f == $newton;
+    f = $newton;
+    emit forceChanged(f);
+}
+
+sub paintEvent {
+    my $e = shift;
+    return unless $e->rect->intersects(cannonRect());
+    my $cr = cannonRect();
+    my $pix = TQt::Pixmap($cr->size);
+    $pix->fill(this, $cr->topLeft);
+
+    my $p = TQt::Painter($pix);
+    $p->setBrush(&blue);
+    $p->setPen(&NoPen);
+    $p->translate(0, $pix->height - 1);
+    $p->drawPie(TQt::Rect(-35, -35, 70, 70), 0, 90*16);
+    $p->rotate(- ang);
+    $p->drawRect(TQt::Rect(33, -4, 15, 8));
+    $p->end;
+
+    $p->begin(this);
+    $p->drawPixmap($cr->topLeft, $pix);
+}
+
+sub cannonRect {
+    my $r = TQt::Rect(0, 0, 50, 50);
+    $r->moveBottomLeft(rect()->bottomLeft);
+    return $r;
+}
+
+sub sizePolicy {
+    TQt::SizePolicy(&TQt::SizePolicy::Expanding, &TQt::SizePolicy::Expanding);
+}
+
+1;