SgThumbWheel(3X)
SgThumbWheel --The ThumbWheel widget class
As shipped in IRIX 6.5.7. Unchanged since IRIX 6.5.
NAME SgThumbWheel --The ThumbWheel widget class SYNOPSIS #include <Sgm/ThumbWheel.h> VERSION This page documents the version of Sgm that accompanies Motif 1.2. DESCRIPTION ThumbWheel is used by an application to allow the user to input or modify a value either from within a range of values or from an unbounded (infinite) range. A ThumbWheel has an elongated rectangular region within which a wheel graphic is displayed. The user can modify the ThumbWheel's value by spin- ning the wheel. A ThumbWheel can also include a Home Button located out- side the wheel region. This button allows the user to set the ThumbWheel's value to a known position. Classes ThumbWheel inherits behavior and resources from Core and Primitive classes. The class pointer is sgThumbWheelWidgetClass. The class name is SgThumbWheel. New Resources The following table defines a set of widget resources used by the program- mer to specify data. The programmer can also set the resource values for the inherited classes to set attributes for this widget. To reference a resource by name or by class in a .Xdefaults file, remove the XmN, SgN, XmC, or SgC prefix and use the remaining letters. To specify one of the defined values for a resource in a .Xdefaults file, remove the Xm prefix and use the remaining letters (in either lowercase or uppercase, but in- clude any underscores between words). The codes in the access column indi- cate if the given resource can be set at creation time (C), set by using XtSetValues (S), retrieved by using XtGetValues (G), or is not applicable (N/A). SgThumbWheel Resource Set Name Class Type Default Access ------------------------------------------------------------------------------------- SgNhomePosition SgCHomePosition int 50 CSG XmNmaximum XmCMaximum int 100 CSG XmNminimum XmCMinimum int 0 CSG SgNangleRange SgCAngleRange int 150 CSG SgNunitsPerRotation SgCUnitsPerRotation int 240 CSG XmNorientation XmCOrientation unsigned char XmVERTICAL CSG SgNshowHomeButton XmCShowHomeButton Boolean True CSG XmNvalue XmCValue int dynamic CSG XmNvalueChangedCallback XmCCallback XtCallbackList NULL C XmNdragCallback XmCCallback XtCallbackList NULL C SgNhomePosition Specifies the "known value" to which the thumb wheel's value is set when the home button is clicked. XmNmaximumSpecifies the thumb wheel's maximum value. XmNmaximum must be greater than or equal to XmNminimum. Setting XmNmaximum equal to XmNminimum indicates an infinite range. XmNminimumSpecifies the thumb wheel's minimum value. XmNmaximum must be greater than or equal to XmNminimum. Setting XmNmaximum equal to XmNminimum indicates an infinite range. SgNangleRange Specifies the angular range, in degrees, through which the thumb wheel is allowed to rotate. This, in conjunction with XmNmaximum and XmNminimum, controls the fineness or coarseness of the wheel control when it is not infinite. If set to zero, the thumb wheel has an infinite range. The default of 150 represents roughly the visible amount of the wheel. Thus clicking at one end of the wheel and dragging the mouse to the other end would give roughly the entire range from XmNminimum to XmNmaximum. SgNunitsPerRotation Specifies the change in XmNvalue when the wheel is rotated one full turn around. This controls the fineness or coarseness of the wheel control when the range is infinite. XmNorientation Displays ThumbWheel vertically or horizontally. This resource can have values of XmVERTICAL and XmHORIZONTAL. SgNshowHomeButton Specifies whether a home button should be displayed next to the slider. If the value is True, the home button is displayed. XmNvalue Specifies the current position of the thumb wheel, between XmN- minimum and XmNmaximum if the thumb wheel is not infinite. XmNvalueChangedCallback Specifies the list of callbacks that is called when the value of the thumb wheel has changed. The reason sent by the callback is XmCR_VALUE_CHANGED. XmNdragCallback Specifies the list of callbacks that is called when the wheel po- sition changes as the wheel is being spun. The reason sent by the callback is XmCR_DRAG. Inherited Resources ThumbWheel inherits behavior and resources from the following superclasses. For a complete description of each resource, refer to the man page for that superclass. XmPrimitive Resource Set Name Class Type Default Access ------------------------------------------------------------------------------------------------- XmNbottomShadowColor XmCBottomShadowColor Pixel dynamic CSG XmNbottomShadowPixmap XmCBottomShadowPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG XmNforeground XmCForeground Pixel dynamic CSG XmNhelpCallback XmCCallback XtCallbackList NULL C XmNhighlightColor XmCHighlightColor Pixel dynamic CSG XmNhighlightOnEnter XmCHighlightOnEnter Boolean False CSG XmNhighlightPixmap XmCHighlightPixmap Pixmap dynamic CSG XmNhighlightThickness XmCHighlightThickness Dimension 0 CSG XmNnavigationType XmCNavigationType XmNavigationType XmNONE CSG XmNshadowThickness XmCShadowThickness Dimension 0 CSG XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG XmNtopShadowPixmap XmCTopShadowPixmap Pixmap dynamic CSG XmNtraversalOn XmCTraversalOn Boolean False CSG XmNunitType XmCUnitType unsigned char dynamic CSG XmNuserData XmCUserData XtPointer NULL CSG Core Resource Set Name Class Type Default Access --------------------------------------------------------------------------------------------------------------- XmNaccelerators XmCAccelerators XtAccelerators dynamic CSG XmNancestorSensitive XmCSensitive Boolean dynamic G XmNbackground XmCBackground Pixel dynamic CSG XmNbackgroundPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG XmNborderColor XmCBorderColor Pixel XtDefaultForeground CSG XmNborderPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG XmNborderWidth XmCBorderWidth Dimension 0 CSG XmNcolormap XmCColormap Colormap dynamic CG XmNdepth XmCDepth int dynamic CG XmNdestroyCallback XmCCallback XtCallbackList NULL C XmNheight XmCHeight Dimension dynamic CSG XmNinitialResourcesPersistent XmCInitialResourcesPersistent Boolean True C XmNmappedWhenManaged XmCMappedWhenManaged Boolean True CSG XmNscreen XmCScreen Screen * dynamic CG XmNsensitive XmCSensitive Boolean True CSG XmNtranslations XmCTranslations XtTranslations dynamic CSG XmNwidth XmCWidth Dimension dynamic CSG XmNx XmCPosition Position 0 CSG XmNy XmCPosition Position 0 CSG Callback Information A pointer to the following structure is passed to each callback: typedef struct { int reason; XEvent * event; int value; } SgThumbWheelCallbackStruct; reason Indicates why the callback was invoked event Points to the XEvent that triggered the callback value Is the new thumb wheel value Behavior ThumbWheel behavior is described below: BSelect Press or BDrag Press: (in slider): Activates the interactive dragging of the wheel. (in home button): Sets the wheel value to SgNhomePosition. BSelect Motion or BDrag Motion: If the button press occurs within the wheel, the subsequent mo- tion events spin the wheel to follow the motion of the pointer and call the callbacks for XmNdragCallback. BSelect Release or BDrag Release: If the button press occurs within the wheel and the wheel posi- tion is changed, the callbacks for XmNvalueChangedCallback are called. Virtual Bindings The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings(3X). RELATED INFORMATION SgThumbWheelGetValue(3X), SgThumbWheelSetValue(3X), Primitive(3X), Core(3X) ThumbWheel(3X)