diff options
Diffstat (limited to 'PerlTQt/tutorials/t12/CannonField.pm')
| -rw-r--r-- | PerlTQt/tutorials/t12/CannonField.pm | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/PerlTQt/tutorials/t12/CannonField.pm b/PerlTQt/tutorials/t12/CannonField.pm new file mode 100644 index 0000000..6cc1529 --- /dev/null +++ b/PerlTQt/tutorials/t12/CannonField.pm @@ -0,0 +1,177 @@ +package CannonField; +use strict; +use TQt; +use TQt::isa qw(TQt::Widget); +use TQt::signals + hit => [], + missed => [], + angleChanged => ['int'], + forceChanged => ['int']; +use TQt::slots + setAngle => ['int'], + setForce => ['int'], + shoot => [], + moveShot => []; +use TQt::attributes qw( + ang + f + + timerCount + autoShootTimer + shoot_ang + shoot_f + + target +); +use POSIX qw(atan); + +sub angle () { ang } +sub force () { f } + +sub NEW { + shift->SUPER::NEW(@_); + + ang = 45; + f = 0; + timerCount = 0; + autoShootTimer = TQt::Timer(this, "movement handler"); + this->connect(autoShootTimer, TQT_SIGNAL('timeout()'), TQT_SLOT('moveShot()')); + shoot_ang = 0; + shoot_f = 0; + target = TQt::Point(0, 0); + setPalette(TQt::Palette(TQt::Color(250, 250, 200))); + newTarget(); +} + +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 shoot { + return if autoShootTimer->isActive; + timerCount = 0; + shoot_ang = ang; + shoot_f = f; + autoShootTimer->start(50); +} + +sub newTarget { + my $r = TQt::Region(targetRect()); + target = TQt::Point(200 + int(rand(190)), + 10 + int(rand(255))); + repaint($r->unite(TQt::Region(targetRect()))); +} + +sub moveShot { + my $r = TQt::Region(shotRect()); + timerCount++; + + my $shotR = shotRect(); + + if($shotR->intersects(targetRect())) { + autoShootTimer->stop; + emit hit(); + } elsif($shotR->x > width() || $shotR->y > height()) { + autoShootTimer->stop; + emit missed(); + } else { + $r = $r->unite(TQt::Region($shotR)); + } + repaint($r); +} + +sub paintEvent { + my $e = shift; + my $updateR = $e->rect; + my $p = TQt::Painter(this); + + paintCannon($p) if $updateR->intersects(cannonRect()); + paintShot($p) if autoShootTimer->isActive and $updateR->intersects(shotRect()); + paintTarget($p) if $updateR->intersects(targetRect()); +} + +sub paintShot { + my $p = shift; + $p->setBrush(&black); + $p->setPen(&NoPen); + $p->drawRect(shotRect()); +} + +sub paintTarget { + my $p = shift; + $p->setBrush(&red); + $p->setPen(&black); + $p->drawRect(targetRect()); +} + +my $barrelRect = TQt::Rect(33, -4, 15, 8); + +sub paintCannon { + my $p = shift; + my $cr = cannonRect(); + my $pix = TQt::Pixmap($cr->size); + $pix->fill(this, $cr->topLeft); + + my $tmp = TQt::Painter($pix); + $tmp->setBrush(&blue); + $tmp->setPen(&NoPen); + + $tmp->translate(0, $pix->height - 1); + $tmp->drawPie(TQt::Rect(-35, -35, 70, 70), 0, 90*16); + $tmp->rotate(- ang); + $tmp->drawRect($barrelRect); + $tmp->end; + + $p->drawPixmap($cr->topLeft, $pix); +} + +sub cannonRect { + my $r = TQt::Rect(0, 0, 50, 50); + $r->moveBottomLeft(rect()->bottomLeft); + return $r; +} + +sub shotRect { + my $gravity = 4; + + my $time = timerCount / 4.0; + my $velocity = shoot_f; + my $radians = shoot_ang*3.14159265/180; + + my $velx = $velocity*cos($radians); + my $vely = $velocity*sin($radians); + my $x0 = ($barrelRect->right + 5)*cos($radians); + my $y0 = ($barrelRect->right + 5)*sin($radians); + my $x = $x0 + $velx*$time; + my $y = $y0 + $vely*$time - 0.5*$gravity*$time**2; + + my $r = TQt::Rect(0, 0, 6, 6); + $r->moveCenter(TQt::Point(int($x), height() - 1 - int($y))); + return $r; +} + +sub targetRect { + my $r = TQt::Rect(0, 0, 20, 10); + $r->moveCenter(TQt::Point(target->x, height() - 1 - target->y)); + return $r; +} + +sub sizePolicy { + TQt::SizePolicy(&TQt::SizePolicy::Expanding, &TQt::SizePolicy::Expanding); +} + +1; |