Class: AnalogClock

Inherits:
Qt::Widget show all
Defined in:
ext/ruby/qtruby/examples/widgets/analogclock/analogclock.rb

Overview

an analog clock widget using an internal Qt::Timer

Instance Method Summary collapse

Methods inherited from Qt::Widget

#raise

Methods inherited from Qt::Base

#%, #&, #*, #**, #+, #-, #-@, #/, #<, #<<, #<=, #==, #>, #>=, #>>, #QCOMPARE, #QEXPECT_FAIL, #QFAIL, #QSKIP, #QTEST, #QVERIFY, #QVERIFY2, #QWARN, #^, ancestors, #is_a?, #methods, private_slots, #protected_methods, #public_methods, q_classinfo, q_signal, q_slot, signals, #singleton_methods, slots, #|, #~

Constructor Details

#initialize(parent = nil) ⇒ AnalogClock

Returns a new instance of AnalogClock.



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# File 'ext/ruby/qtruby/examples/widgets/analogclock/analogclock.rb', line 33

def initialize(parent = nil)
    super(parent)

    @timer = Qt::Timer.new(self)
    connect(@timer, SIGNAL('timeout()'), self, SLOT('update()'))
    @timer.start(1000)

    setWindowTitle(tr("Analog Clock"))
    resize(200, 200)
end

Instance Method Details

#paintEvent(e) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/widgets/analogclock/analogclock.rb', line 44

def paintEvent(e)
    hourHand = Qt::Polygon.new( [   Qt::Point.new(7, 8),
                                    Qt::Point.new(-7, 8),
                                    Qt::Point.new(0, -40) ] )
    minuteHand = Qt::Polygon.new(   [   Qt::Point.new(7, 8),
                                        Qt::Point.new(-7, 8),
                                        Qt::Point.new(0, -70) ] )
    hourColor = Qt::Color.new(127, 0, 127)
    minuteColor = Qt::Color.new(0, 127, 127, 191)

    side = width() < height() ? width() : height()
    time = Qt::Time.currentTime

    painter = Qt::Painter.new(self)
    painter.renderHint = Qt::Painter::Antialiasing
    painter.translate(width() / 2, height() / 2)
    painter.scale(side / 200.0, side / 200.0)

    painter.pen = Qt::NoPen
    painter.brush = Qt::Brush.new(hourColor)

    painter.save
    painter.rotate(30.0 * ((time.hour + time.minute / 60.0)))
    painter.drawConvexPolygon(hourHand)
    painter.restore

    painter.pen = hourColor
    (0...12).each do |i|
        painter.drawLine(88, 0, 96, 0)
        painter.rotate(30.0)
    end

    painter.pen = Qt::NoPen
    painter.brush = Qt::Brush.new(minuteColor)

    painter.save
    painter.rotate(6.0 * (time.minute + time.second / 60.0))
    painter.drawConvexPolygon(minuteHand)
    painter.restore

    painter.pen = minuteColor
    (0...60).each do |j|
        if (j % 5) != 0
            painter.drawLine(92, 0, 96, 0)
        end
        painter.rotate(6.0)
    end

		painter.end
end