xmScale

#! /usr/sgitcl/bin/moat 
xtAppInitialize
xmMainWindow .main managed
xmScale .main.slide managed -orientation horizontal \
    -maximum 11 -value 11 -showValue True \
    -titleString "Volume"
. realizeWidget
. mainLoop

Figure 4-6 : xmScale Horizontal Slider The xmScale widget class defines the new resources, as shown in Table 4-34.

xmScale Resources

Resource Name	Default Value	Type or Legal Values
-decimalPoints	0	Integer
-fontList	Inherited	Font List
-highlightOnEnter	False	Boolean
-highlightThickness	2	Dimension
-maximum	100	Integer
-minimum	0	Integer
-orientation	vertical	horizontal vertical
-processingDirection	computed	max_on_bottom max_on_left max_on_right max_on_top
-scaleHeight	0	Dimension
-scaleWidth	0	Dimension
-scaleMultiple	$(max-min)/10$	Integer
-showValue	False	Boolean
-titleString	""	String
-value	0	Integer

The slider may be moved between the integer -minimum and -maximum. Fractional values are obtained using the -decimalPoints resource, to display a decimal point. The slider size may be set by -scaleHeight and -scaleWidth. The resource -showValue toggles display of text showing the current value, while -scaleMultiple is used for large slider moves with a <Ctrl>-Arrow key.

Table 4-35 lists callbacks defined for the xmScale widget.

xmScale Callbacks

Method Name	Why
valueChangedCallback	The scale value had changed.
dragCallback	The slider is being dragged.

In addition, xmScale inherits the usual helpCallback from the Primitive abstract class.

In these callbacks, %value substitution may be used to retrieve the current scale position.