diff options
Diffstat (limited to 'qtruby/rubylib/tutorial/t14/cannon.rb')
| -rw-r--r-- | qtruby/rubylib/tutorial/t14/cannon.rb | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/qtruby/rubylib/tutorial/t14/cannon.rb b/qtruby/rubylib/tutorial/t14/cannon.rb new file mode 100644 index 00000000..b0f77d37 --- /dev/null +++ b/qtruby/rubylib/tutorial/t14/cannon.rb @@ -0,0 +1,279 @@ +require 'Qt' +include Math + +class CannonField < Qt::Widget + + signals 'hit()', 'missed()', 'angleChanged(int)', 'forceChanged(int)', + 'canShoot(bool)' + + slots 'setAngle(int)', 'setForce(int)', 'shoot()', 'moveShot()', + 'newTarget()', 'setGameOver()', 'restartGame()' + + def initialize(parent, name) + super + @ang = 45 + @f = 0 + @timerCount = 0; + @autoShootTimer = Qt::Timer.new( self, 'movement handler' ) + connect( @autoShootTimer, SIGNAL('timeout()'), + self, SLOT('moveShot()') ) + @shoot_ang = 0 + @shoot_f = 0 + @target = Qt::Point.new(0, 0) + @gameEnded = false + @barrelPressed = false + setPalette( Qt::Palette.new( Qt::Color.new( 250, 250, 200) ) ) + newTarget() + @barrelRect = Qt::Rect.new(33, -4, 15, 8) + end + + def angle() + return @ang + end + + def force() + return @f + end + + def gameOver() + return @gameEnded + end + + def setAngle( degrees ) + if degrees < 5 + degrees = 5 + elsif degrees > 70 + degrees = 70 + end + if @ang == degrees + return + end + @ang = degrees + repaint( cannonRect(), false ) + emit angleChanged( @ang ) + end + + def setForce( newton ) + if newton < 0 + newton = 0 + end + if @f == newton + return + end + @f = newton + emit forceChanged( @f ) + end + + def shoot() + if isShooting() + return + end + @timerCount = 0 + @shoot_ang = @ang + @shoot_f = @f + @autoShootTimer.start( 50 ) + emit canShoot( false ) + end + + @@first_time = true + + def newTarget() + if @@first_time + @@first_time = false + midnight = Qt::Time.new( 0, 0, 0 ) + srand( midnight.secsTo(Qt::Time.currentTime()) ) + end + r = Qt::Region.new( targetRect() ) + @target = Qt::Point.new( 200 + rand(190), + 10 + rand(255) ) + repaint( r.unite( Qt::Region.new(targetRect()) ) ) + end + + def setGameOver() + if @gameEnded + return + end + if isShooting() + @autoShootTimer.stop() + end + @gameEnded = true + repaint() + end + + def restartGame() + if isShooting() + @autoShootTimer.stop() + end + @gameEnded = false + repaint() + emit canShoot( true ) + end + + def moveShot() + r = Qt::Region.new( shotRect() ) + @timerCount += 1 + + shotR = shotRect() + + if shotR.intersects( targetRect() ) + @autoShootTimer.stop() + emit hit() + emit canShoot(true) + elsif shotR.x() > width() || shotR.y() > height() || + shotR.intersects(barrierRect()) + @autoShootTimer.stop() + emit missed() + emit canShoot(true) + else + r = r.unite( Qt::Region.new( shotR ) ) + end + + repaint( r ) + end + private :moveShot + + def mousePressEvent( e ) + if e.button() != Qt::LeftButton + return + end + if barrelHit( e.pos() ) + @barrelPressed = true + end + end + + def mouseMoveEvent( e ) + if !@barrelPressed + return + end + pnt = e.pos(); + if pnt.x() <= 0 + pnt.setX( 1 ) + end + if pnt.y() >= height() + pnt.setY( height() - 1 ) + end + rad = atan2((rect().bottom()-pnt.y()), pnt.x()) + setAngle( ( rad*180/3.14159265 ).round ) + end + + def mouseReleaseEvent( e ) + if e.button() == Qt::LeftButton + @barrelPressed = false + end + end + + def paintEvent( e ) + updateR = e.rect() + p = Qt::Painter.new( self ) + + if @gameEnded + p.setPen( black ) + p.setFont( Qt::Font.new( 'Courier', 48, Qt::Font::Bold ) ) + p.drawText( rect(), Qt::AlignCenter, 'Game Over' ) + end + if updateR.intersects( cannonRect() ) + paintCannon( p ) + end + if updateR.intersects( barrierRect() ) + paintBarrier( p ) + end + if isShooting() && updateR.intersects( shotRect() ) + paintShot( p ) + end + if !@gameEnded && updateR.intersects( targetRect() ) + paintTarget( p ) + end + + p.end() + end + + def paintShot( p ) + p.setBrush( black ) + p.setPen( Qt::NoPen ) + p.drawRect( shotRect() ) + end + + def paintTarget( p ) + p.setBrush( red ) + p.setPen( black ) + p.drawRect( targetRect() ) + end + + def paintBarrier( p ) + p.setBrush( yellow ) + p.setPen( black ) + p.drawRect( barrierRect() ) + end + + def paintCannon(p) + cr = cannonRect() + pix = Qt::Pixmap.new( cr.size() ) + pix.fill( self, cr.topLeft() ) + + tmp = Qt::Painter.new( pix ) + tmp.setBrush( blue ) + tmp.setPen( Qt::NoPen ) + + tmp.translate( 0, pix.height() - 1 ) + tmp.drawPie( Qt::Rect.new(-35, -35, 70, 70), 0, 90*16 ) + tmp.rotate( - @ang ) + tmp.drawRect( @barrelRect ) + tmp.end() + + p.drawPixmap(cr.topLeft(), pix ) + end + private :paintShot, :paintTarget, :paintBarrier, :paintCannon + + def cannonRect() + r = Qt::Rect.new( 0, 0, 50, 50) + r.moveBottomLeft( rect().bottomLeft() ) + return r + end + + def shotRect() + gravity = 4.0 + + time = @timerCount / 4.0 + velocity = @shoot_f + radians = @shoot_ang*3.14159265/180.0 + + velx = velocity*cos( radians ) + vely = velocity*sin( radians ) + x0 = ( @barrelRect.right() + 5.0 )*cos(radians) + y0 = ( @barrelRect.right() + 5.0 )*sin(radians) + x = x0 + velx*time + y = y0 + vely*time - 0.5*gravity*time*time + + r = Qt::Rect.new( 0, 0, 6, 6 ); + r.moveCenter( Qt::Point.new( x.round, height() - 1 - y.round ) ) + return r + end + + def targetRect() + r = Qt::Rect.new( 0, 0, 20, 10 ) + r.moveCenter( Qt::Point.new(@target.x(),height() - 1 - @target.y()) ) + return r + end + + def barrierRect() + return Qt::Rect.new( 145, height() - 100, 15, 100 ) + end + + def barrelHit( p ) + mtx = Qt::WMatrix.new + mtx.translate( 0, height() - 1 ) + mtx.rotate( - @ang ) + mtx = mtx.invert() + return @barrelRect.contains( mtx.map(p) ) + end + + private :cannonRect, :shotRect, :targetRect, :barrierRect, :barrelHit + + def isShooting() + return @autoShootTimer.isActive() + end + + def sizePolicy() + return Qt::SizePolicy.new( Qt::SizePolicy::Expanding, Qt::SizePolicy::Expanding ) + end +end |