Classes

SpinBox inherits behavior, resources, and traits from the Core, Composite, Constraint, and XmManager classes.

The class pointer is xmSpinBoxWidgetClass.

The class name is XmSpinBox.

New Resources

The following table defines a set of widget resources used by the programmer 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 or XmC 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 include any underscores between words). The codes in the access column indicate whether 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).

XmNarrowLayout

Specifies placement of the two arrows in the widget. Possible layouts are as follows:

XmNarrowSize

Specifies both the width and height of the arrow in pixels.

XmNdefaultArrowSensitivity

Specifies the default sensitivity of the arrows in the widget. Insensitive arrows change color, cannot be depressed, and perform no action. (This resource may be overridden by the constraint resource XmNarrowSensitivity for individual traversable text children of the SpinBox.) Possible default sensitivity values are as follows:

XmNdetailShadowThickness

Specifies the thickness of the inside arrow shadows. The default thickness is 2 pixels.

XmNinitialDelay

Specifies how long, in milliseconds, the mouse button must be held down before automatic spinning begins. In other words, when the user selects the increment or decrement arrow and keeps it depressed, this delay occurs before the choices start spinning. If XmNinitialDelay is 0, then XmNrepeatDelay is used as the initial delay.

XmNmarginHeight

Specifies the amount of blank space between the top edge of the SpinBox widget and the first item in each column, and the bottom edge of the SpinBox widget and the last item in each column.

XmNmarginWidth

Specifies the amount of blank space between the left edge of the SpinBox widget and the first item in each row, and the right edge of the SpinBox widget and the last item in each row.

XmNmodifyVerifyCallback

This callback is called before the SpinBox position changes (see the Constraint resource XmNposition). The application can use this callback to set the next position, change SpinBox resources, or cancel the impending action. For example, this callback can be used to stop the spinning just before wrapping at the upper and lower position boundaries. If the doit member is set to False, nothing happens. Otherwise the position changes. Reasons sent by the callback are XmCR_SPIN_NEXT, XmCR_SPIN_PRIOR, XmCR_SPIN_FIRST, or XmCR_SPIN_LAST.

XmNrepeatDelay

When the user selects and keeps an arrow button depressed by pressing and holding <Btn1>, spinning begins. After the time specified in XmNinitialDelay elapses, the SpinBox position changes automatically until the arrow button is released. The XmNrepeatDelay resource specifies the delay in milliseconds between each automatic change. If XmNrepeatDelay is set to 0 (zero), automatic spinning is turned off and XmNinitialDelay is ignored.

XmNspacing

Specifies the horizontal and vertical spacing between items contained within the SpinBox widget.

XmNvalueChangedCallback

This is called n+1 times for n SpinBox position changes (see the Constraint resource XmNposition). Reasons sent by the callback are XmCR_OK, XmCR_SPIN_NEXT, XmCR_SPIN_PRIOR, XmCR_SPIN_FIRST, or XmCR_SPIN_LAST. Other members are detailed in the callback structure description.

XmSpinBox Constraint
Resource Set
Name	Class	Type	Default	Access
XmNarrowSensitivity	XmCArrowSensitivity	unsigned char	XmARROWS_DEFAULT_SENSITIVITY	CSG
XmNdecimalPoints	XmCDecimalPoints	short	0	CSG
XmNincrementValue	XmCIncrementValue	int	1	CSG
XmNmaximumValue	XmCMaximumValue	int	10	CSG
XmNminimumValue	XmCMinimumValue	int	0	CSG
XmNnumValues	XmCNumValues	int	0	CSG
XmNposition	XmCPosition	int	0	CSG
XmNpositionType	XmCPositionType	char	XmPOSITION_VALUE	CG
XmNspinBoxChildType	XmSpinBoxChildType	unsigned char	XmSTRING	CG
XmNvalues	XmCValues	XmStringTable	NULL	CSG

XmNarrowSensitivity

Specifies the sensitivity of the arrows for a SpinBox child. By using this resource in the definition of a SpinBox child, the application programmer can override the default SpinBox sensitivity (set by XmNdefaultArrowSensitivity) for a particular child. This allows each traversable child to have a different arrow sensitivity. The arrow sensitivity values are as follows:

XmNdecimalPoints

Specifies the number of decimal places used when displaying the value of a SpinBox numeric type child. If the number of decimal places specified is greater than the number of digits in a displayed value, the value is padded with 0 (zeros). For example, when XmNinitialValue is 1 and XmNmaximumValue is 1000 and XmNdecimalPoints is 3, the range of values displayed in the SpinBox is 0.001 to 1.000. This is used only when XmNspinBoxChildType is XmNUMERIC.

XmNincrementValue

Specifies the amount by which to increment or decrement a SpinBox numeric type child. This is used only when XmNspinBoxChildType is XmNUMERIC.

XmNmaximumValue

Specifies the highest possible value for a numeric SpinBox. This is used only when XmNspinBoxChildType is XmNUMERIC.

XmNminimumValue

Specifies the lowest possible value for a numeric SpinBox. This is used only when XmNspinBoxChildType is XmNUMERIC.

XmNnumValues

Specifies the number of strings in XmNvalues. The application must change this value when strings are added or removed from XmNvalues. This is used only when XmNspinBoxChildType is XmSTRING.

XmNposition

Specifies the position of the currently displayed item. The interpritation of XmNposition is dependent upon the value of the XmNpositionType resource.

When XmNpositionType is XmPOSITION_INDEX the XmNposition value is interpreted as follows: For XmSpinBox children of type XmNUMERIC, the XmNposition resource is interpreted as an index into an array of items. The minimum allowable value for XmNposition is 0. The maximum allowable value for XmNposition is (XmNmaximumValue-XmNminimumValue)/XmNincrementValue. The value display by the XmSpinBox child is XmNminimumValue+(XmNposition*XmNincrementValue). For XmSpinBox children of type XmSTRING, the XmNposition resource is interpreted as an index into an array of XmNnumValues items. The minimum allowable value for XmNposition is 0. The maximum allowable value for XmNposition is XmNnumValues - 1. The value displayed by the XmSpinBox is the XmNposition'th value in the XmNvalues array.

When XmNpositionType is XmPOSITION_VALUE the XmNposition value is interpreted as follows:

For XmSpinBox children of type XmNUMERIC, the XmNposition resource is interpreted as the actual value to be displayed. The minimum allowable value for XmNposition is XmNminimumValue. The maximum allowable value for XmNposition is XmNmaximumValue. The value displayed by the XmSpinBox child is XmNposition. For XmSpinBox children of type XmSTRING, the interpretation is the same for XmPOSITION_VALUE as for XmPOSITION_INDEX.

Position values falling outside the specified range are invalid. When an application assigns a value to XmNposition which is less than the minimum, XmNposition is set to the minimum and an error message is displayed. When an application assigns a value to XmNposition which is greater than the maximum, XmNposition is set to the maximum and an error message is displayed.

XmNpositionType

Specifies how values the XmNposition resource are to be interpreted. Valid values include XmPOSITION_INDEX and XmPOSITION_VALUE.

XmNspinBoxChildType

Specifies the type of data displayed in the child:

XmNvalues

Specifies the array of XmStrings to be displayed in a SpinBox string type child. The application must change XmNnumValues when strings are added to or removed from XmNvalues. This is used only when XmNspinBoxChildType is XmSTRING.

Inherited Resources

SpinBox inherits behavior and resources from the superclasses described in the following tables. For a complete description of each resource, refer to the reference page for that superclass.

Callback

A pointer to the following structure is passed to each callback:

typedef struct
{


        int reason;


        XEvent * event;


        Widget widget;


        Boolean doit;


        int position;


        XmString value;


        Boolean crossed_boundary;
} XmSpinBoxCallbackStruct;

reason

Indicates why the callback was invoked. Reasons may be the following:

event

Points to the XEvent that triggered this callback.

widget

Specifies the child widget affected by this callback.

doit

When the callback is XmNmodifyVerifyCallback, doit indicates whether or not an action will be performed before the SpinBox position changes. If the callback leaves doit set to True (the default), the spinning action is performed. If the callback sets doit to False, the spinning action is not performed. When the callback is XmNvalueChangedCallback, doit is ignored.

position

Specifies the next value of the SpinBox position (same as XmNposition). This is an output field for the XmNmodifyVerifyCallback, which may change the next position as dictated by the needs of an application.

value

Specifies the new XmString value in the text child widget. The user program must copy this string if it is to be used outside the callback routine.

crossed_boundary

Specifies whether or not the SpinBox has crossed the upper or lower boundary (the last or first compound string, or the maximum or minimum value). The crossed_boundary value is True if the SpinBox has just crossed a boundary, and False if it has not.

Translations

The XmSpinBox translations are as follows:

The following key names are listed in the X standard key event translation table syntax. This format is the one used by Motif to specify the widget actions corresponding to a given key. A brief overview of the format is provided under VirtualBindings(3). For a complete description of the format, please refer to the X Toolkit Instrinsics Documentation.

<Btn1Down>:

SpinBArm()

<Btn1Up>:

SpinBDisarm()

:<Key><osfUp> :

SpinBPrior()

:<Key><osfDown> :

SpinBNext()

:<Key><osfLeft> :

SpinBLeft()

:<Key><osfRight> :

SpinBRight()

:<Key><osfBeginData> :

SpinBFirst()

:<Key><osfEndData> :

SpinBLast()

Accelerators

The XmNaccelerators resource of a SpinBox are added to each traversable text child. The default XmNaccelerators are defined in the following list. The bindings for <Key><osfUp> and <Key><osfDown> cannot be changed.

<Key> <osfUp>:

SpinBPrior()

<Key> <osfDown>:

SpinBNext()

<KeyUp> <osfUp>:

SpinBDisarm()

<KeyUp> <osfDown>:

SpinBDisarm()

<Key> <osfLeft>:

SpinBLeft()

<Key> <osfRight>:

SpinBRight()

<KeyUp> <osfLeft>:

SpinBDisarm()

<KeyUp> <osfRight>:

SpinBDisarm()

<Key> <osfBeginData>:

SpinBFirst()

<Key> <osfEndData>:

SpinBLast()

Action Routines

The XmSpinBox action routines are as follows:

SpinBArm():

Visually arms the SpinBox by drawing the armed arrow so that it appears to be depressed. This action is initiated when the user presses <Btn1> while the pointer is within the boundaries of either the increment or decrement arrow. The arrow remains visually armed as long as <Btn1> remains depressed.

If the time period specified by XmNrepeatDelay is not greater than zero milliseconds, nothing else happens while <Btn1> remains depressed.

If the time period specified by XmNrepeatDelay is greater than zero milliseconds, and the arrow is disarmed before the time period specified by XmNinitialDelay has elapsed, nothing else happens in this action.

If the time period specified by XmNrepeatDelay is greater than zero milliseconds, and the arrow is still armed after the time period specified by XmNinitialDelay has elapsed, the following occurs:

If doit remains set to True, the following occurs:

These events are repeated each time the XmNrepeatDelay period elapses and the arrow remains armed.

SpinBDisarm():

Visually disarms the SpinBox by drawing the previously armed arrow so that it no longer appears to be depressed.

If the time period specified by XmNrepeatDelay is not greater than zero milliseconds, or the time period specified by XmNinitialDelay has not elapsed, the following then occurs:

If doit remains set to True, the following occurs:

If an XmNvalueChangedCallback procedure is issued after the button has been armed, regardless of the value of XmNrepeatDelay or whether the XmNinitialDelay has expired:

SpinBFirst():

The following occurs:

If doit remains set to True, the following occurs:

SpinBLast():

The following occurs:

If doit remains set to True, the following occurs:

SpinBLeft():

If the VendorShell resource XmNlayoutDirection is left-to-right, the SpinBPrior action is invoked. Otherwise, the SpinBNext action is invoked.

SpinBNext():

Visually arms the SpinBox by drawing the increment arrow so that it appears to be depressed. The following occurs:

If doit remains set to True, the following occurs:

SpinBPrior():

Visually arms the SpinBox by drawing the decrement arrow so that it appears to be depressed. The following occurs:

If doit remains set to True, the following occurs:

SpinBRight():

If the VendorShell resource XmNlayoutDirection is left-to-right, the SpinBNext action is invoked. Otherwise, the SpinBPrior action is invoked.