The values of numbers can be changed by sliding the SliderRectangle . A QSliderRectangle is the part of the QSlider that moves to change the number value of the Slider. A QSliderMaker is used to make QSlider s. The starting, stopping, and step values are specified via simple dialog boxes. The values for start, step, stop, are arbitrary in a sense that start can be bigger, smaller, or even the same as the stop.
Step can be a double value even if start and stop are integers.
QDisplayer A QDisplayer is a button with an associated display window. It is used to display the value of a QActor . When a QDisplayer is clicked, it searches the QWorld for a QActor beneath it. If it finds such a QActor , it displays the QActor 's value in the QDisplayer's associated window. QBlackHole A QBlackHole is a button to save and remove any QActor from the QWorld .