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require 'Qt4'
class LCDRange < Qt::Widget
signals 'valueChanged(int)'
slots 'setValue(int)', 'setRange(int, int)'
def initialize(parent = nil)
super
lcd = Qt::LCDNumber.new(2)
@slider = Qt::Slider.new(Qt::Horizontal)
@slider.range = 0..99
@slider.setValue(0)
connect(@slider, SIGNAL('valueChanged(int)'), lcd, SLOT('display(int)'))
connect(@slider, SIGNAL('valueChanged(int)'), SIGNAL('valueChanged(int)'))
layout = Qt::VBoxLayout.new
layout.addWidget(lcd)
layout.addWidget(@slider)
setLayout(layout)
setFocusProxy(@slider)
end
def value()
@slider.value()
end
def setValue( value )
@slider.setValue( value )
end
def range=( r )
setRange(r.begin, r.end)
end
def setRange( minVal, maxVal )
if minVal < 0 || maxVal > 99 || minVal > maxVal
qWarning( "LCDRange::setRange(#{minVal},#{maxVal})\n" +
"\tRange must be 0..99\n" +
"\tand minVal must not be greater than maxVal" )
return
end
@slider.range = minVal..maxVal
end
end
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