Value Selectors
Value selectors are components that allow the user to select a value. This is a fairly
diverse category of components because the types of values they allow the
user to select and the ways in which they allow the user to select the
values are quite different. Figure 7-3
shows the basic value selector components (except for VSlider
, because it is the vertical version of
HSlider
, which is shown).
Figure 7-3. Value selector components
The slider components (HSlider
and VSlider
) differ only in that one is horizontal and one is vertical.
Otherwise, they behave identically. The slider components allow the user
to select a numeric value along a range from a minimum to a maximum value.
The default range is 0 to 10, but you can adjust the range using the
minimum
and maximum
properties. The slider components allow
the user to drag a thumb along that range. Optionally, you can add more
than one thumb and allow the user to select a range of values. Use the
thumbCount
property to specify the number of thumbs. The following example adds
a new thumb when the user clicks on the button:
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical"> <mx:Script> <![CDATA[ private function addThumb():void { hslider.thumbCount++; } ]]> </mx:Script> <mx:HSlider id="hslider" /> <mx:Button label="Add Thumb" click="addThumb();" /> </mx:Application> ...
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