1 files changed, 113 insertions, 0 deletions
diff --git a/qtruby/rubylib/examples/qt-examples/aclock/aclock.rb b/qtruby/rubylib/examples/qt-examples/aclock/aclock.rb
new file mode 100644
index 00000000..a2cdc378
--- /dev/null
+++ b/qtruby/rubylib/examples/qt-examples/aclock/aclock.rb
@@ -0,0 +1,113 @@
+#!/usr/bin/env ruby -w
+
+require 'Qt'
+
+# an analog clock widget using an internal QTimer
+class AnalogClock < Qt::Widget
+	slots 'setTime(const QTime&)', 'drawClock(QPainter*)', 'timeout()'
+
+	def initialize(*k)
+		super(*k)
+
+		@time = Qt::Time::currentTime
+		@internalTimer = Qt::Timer.new(self)
+		connect(@internalTimer, SIGNAL('timeout()'), self, SLOT('timeout()'))
+		@internalTimer.start(5000)
+	end
+
+	def mousePressEvent(e)
+		if isTopLevel
+			topLeft = geometry.topLeft - frameGeometry.topLeft
+			@clickPos = e.pos + topLeft
+		end
+	end
+
+	def mouseMoveEvent(e)
+		if isTopLevel
+			move(e.globalPos - @clickPos) unless @clickPos.nil?
+		end
+	end
+
+	def setTime(t)
+		# erm. huh?
+		timeout()
+	end
+
+	# The QTimer::timeout() signal is received by this slot.
+	def timeout
+		new_time = Qt::Time::currentTime
+		@time = @time.addSecs 5
+		unless new_time.minute == @time.minute
+			if autoMask
+				updateMask
+			else
+				update
+			end
+		end
+	end
+
+	def paintEvent(blah)
+		unless autoMask
+			paint = Qt::Painter.new(self)
+			paint.setBrush(colorGroup.foreground)
+			drawClock(paint)
+			paint.end
+		end
+	end
+
+	# If clock is transparent, we use updateMask() instead of paintEvent()
+	def updateMask
+		bm = Qt::Bitmap.new(size)
+		bm.fill(color0)			# transparent
+
+		paint = Qt::Painter.new
+		paint.begin(bm, self)
+		paint.setBrush(color1)		# use non-transparent color
+		paint.setPen(color1)
+
+		drawClock(paint)
+
+		paint.end
+		setMask(bm)
+	end
+
+	# The clock is painted using a 1000x1000 square coordinate system, in
+	# the centered square, as big as possible.  The painter's pen and
+	# brush colors are used.
+	def drawClock(paint)
+		paint.save
+
+		paint.setWindow(-500,-500, 1000,1000)
+
+		v = paint.viewport
+		d = [v.width, v.height].min
+		vpx = (v.left + (v.width-d)) / 2
+		vpy = (v.top  - (v.height-d)) / 2
+		paint.setViewport(vpx, vpy, d, d) 
+
+		paint.save
+		paint.rotate(30*(@time.hour%12-3) + @time.minute/2)
+		pts = Qt::PointArray.new(4, [-20,0, 0,-20, 300,0, 0,20])
+		paint.drawConvexPolygon(pts)
+		paint.restore
+
+		paint.save
+		paint.rotate((@time.minute-15)*6)
+		pts = Qt::PointArray.new(4, [-10,0, 0,-10, 400,0, 0,10])
+		paint.drawConvexPolygon(pts)
+		paint.restore;
+
+		12.times {
+			paint.drawLine(440,0, 460,0)
+			paint.rotate(30)
+		}
+
+		paint.restore
+	end
+
+	def setAutoMask(background)
+		setBackgroundMode(background ? PaletteForeground : PaletteBackground)
+		Qt::Widget::setAutoMask(background)
+	end
+
+end