12.4.5 使用其他窗口部件

require 'Qt'
class MyWindow < Qt::Widget
slots 'somethingClicked(QAbstractButton *)'
def initialize(parent = nil)
super(parent)
groupbox = Qt::GroupBox.new("Some Radio Button",self)
radio1 = Qt::RadioButton.new("Radio Button 1", groupbox)
radio2 = Qt::RadioButton.new("Radio Button 2", groupbox)
check1 = Qt::CheckBox.new("Check Box 1", groupbox)
vbox = Qt::VBoxLayout.new
vbox.addWidget(radio1)
vbox.addWidget(radio2)
vbox.addWidget(check1)
groupbox.setLayout(vbox)
bg = Qt::ButtonGroup.new(self)
bg.addButton(radio1)
bg.addButton(radio2)
bg.addButton(check1)
connect(bg, SIGNAL('buttonClicked(QAbstractButton *)'),
self, SLOT('somethingClicked(QAbstractButton *)') )
@label = Qt::Label.new(self)
vbox = Qt::VBoxLayout.new
vbox.addWidget(groupbox)
vbox.addWidget(@label)
setLayout(vbox)
end
def somethingClicked(who)
@label.setText("You clicked on a " + who.className)
end
end
app = Qt::Application.new(ARGV)
widget = MyWindow.new
widget.show
app.exec

require 'Qt'
class TimerClock < Qt::Widget
def initialize(parent = nil)
super(parent)
@timer = Qt::Timer.new(self)
connect(@timer, SIGNAL('timeout()'), self, SLOT('update()'))
@timer.start(25)
setWindowTitle('Stop Watch')
resize(200, 200)
end
def paintEvent(e)
fastHand = Qt::Polygon.new([Qt::Point.new(7, 8),
Qt::Point.new(-7, 8),
Qt::Point.new(0, -80)])
secondHand = Qt::Polygon.new([Qt::Point.new(7, 8),
Qt::Point.new(-7, 8),
Qt::Point.new(0, -65)])
secondColor = Qt::Color.new(100, 0, 100)
fastColor = Qt::Color.new(0, 150, 150, 150)
side = [width, height].min
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(secondColor)
painter.save
painter.rotate(6.0 * time.second)
painter.drawConvexPolygon(secondHand)
painter.restore
painter.pen = secondColor
(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(fastColor)
painter.save
painter.rotate(36.0 * (time.msec / 100.0) )
painter.drawConvexPolygon(fastHand)
painter.restore
painter.pen = fastColor
(0...60).each do |j|
if (j % 5) != 0
painter.drawLine(92, 0, 96, 0)
end
painter.rotate(6.0)
end
painter.end
end
end
app = Qt::Application.new(ARGV)
wid = TimerClock.new
wid.show
app.exec