XmSelectionBox

Motif 2.1 Programmer's Reference

XmSelectionBox

The SelectionBox widget class

Format

#include <Xm/SelectioB.h>

DESCRIPTION

SelectionBox is a general dialog widget that allows the user to select one item from a list. By default, a SelectionBox includes the following:

A scrolling list of alternatives

An editable text field for the selected alternative

Labels for the list and text field

Three or four buttons

The default button labels are OK, Cancel , and Help . By default an Apply button is also created; if the parent of the SelectionBox is a DialogShell, it is managed; otherwise it is unmanaged. Additional children may be added to the SelectionBox after creation. The first child is used as a work area. The value of XmNchildPlacement determines if the work area is placed above or below the Text area, or above or below the List area. Additional children are laid out in the following manner:

Menubar

The first menu bar child is placed at the top of the window. The XmQTmenuSystem trait is used to check that it is the first MenuBar child.

Buttons

All XmPushButton widgets or gadgets, and their subclasses are placed after the OK button in the order of their creation (this order is checked using the XmQTactivatable trait). The layout direction of the buttons depends on the XmNlayoutDirection resource.

The layout of additional children that are not in the above categories is undefined.

The user can select an item in two ways: by scrolling through the list and selecting the desired item or by entering the item name directly into the text edit area. Selecting an item from the list causes that item name to appear in the selection text edit area.

The user may select a new item as many times as desired. The item is not actually selected until the user presses the OK PushButton.

The default value for the XmBulletinBoard resource XmNcancelButton is the Cancel button, unless XmNdialogType is XmDIALOG_COMMAND, when the default is NULL. The default value for the XmBulletinBoard XmNdefaultButton resource is the OK button, unless XmNdialogType is XmDIALOG_COMMAND, when the default is NULL.

For SelectionBox and its subclasses, the default value for XmNinitialFocus is the text edit area.

The user can specify resources in a resource file for the automatically created widgets and gadgets of SelectionBox. The following list identifies the names of these widgets (or gadgets) and the associated SelectionBox areas:

List Items Label

Items

List Items

ItemsList

Selection Label

Selection

Selection Text

Text or TextField

Selection Separator

Separator

SelectionBox uses the XmQTaccessTextual, XmQTactivatable, and XmQTmenuSystem traits.

Descendants

SelectionBox automatically creates the descendants shown in the following table. An application can use XtNameToWidget to gain access to the named descendant. In addition, a user or an application can use the named descendant when specifying resource values.

`Named Descendant`	`Class`	`Identity`
=
`Apply`	XmPushButtonGadget	Apply button
`Cancel`	XmPushButtonGadget	Cancel button
`Help`	XmPushButtonGadget	Help button
`Items`	XmLabelGadget	title above the list of items
`ItemsList`	XmList	list of items from which the user will select
`ItemsListSW`	XmScrolledWindow	ScrolledWindow parent of `ItemsList`
OK	XmPushButtonGadget	OK button
`Selection`	XmLabelGadget	title above the selection box
`Separator`	XmSeparatorGadget	dividing line between selection box and buttons
`Text`	XmTextField	selection box containing text of selected item

Classes

SelectionBox inherits behavior, resources, and traits from Core, Composite, Constraint, XmManager, and XmBulletinBoard.

The class pointer is xmSelectionBoxWidgetClass.

The class name is XmSelectionBox.

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 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).

`XmSelectionBox Resource Set`
`Name`	`Class`	`Type`	`Default`	`Access`
XmNapplyCallback	XmCCallback	XtCallbackList	NULL	C
XmNapplyLabelString	XmCApplyLabelString	XmString	dynamic	CSG
XmNcancelCallback	XmCCallback	XtCallbackList	NULL	C
XmNcancelLabelString	XmCCancelLabelString	XmString	dynamic	CSG
XmNchildPlacement	XmCChildPlacement	unsigned char	XmPLACE_ABOVE_SELECTION	CSG
XmNdialogType	XmCDialogType	unsigned char	dynamic	CG
XmNhelpLabelString	XmCHelpLabelString	XmString	dynamic	CSG
XmNlistItemCount	XmCItemCount	int	0	CSG
XmNlistItems	XmCItems	XmStringTable	NULL	CSG
XmNlistLabelString	XmCListLabelString	XmString	dynamic	CSG
XmNlistVisibleItemCount	XmCVisibleItemCount	int	dynamic	CSG
XmNminimizeButtons	XmCMinimizeButtons	Boolean	False	CSG
XmNmustMatch	XmCMustMatch	Boolean	False	CSG
XmNnoMatchCallback	XmCCallback	XtCallbackList	NULL	C
XmNokCallback	XmCCallback	XtCallbackList	NULL	C
XmNokLabelString	XmCOkLabelString	XmString	dynamic	CSG
XmNselectionLabelString	XmCSelectionLabelString	XmString	dynamic	CSG
XmNtextAccelerators	XmCTextAccelerators	XtAccelerators	default	C
XmNtextColumns	XmCColumns	short	dynamic	CSG
XmNtextString	XmCTextString	XmString	""	CSG

XmNapplyCallback

Specifies the list of callbacks called when the user activates the Apply button. The callback reason is XmCR_APPLY.

XmNapplyLabelString

Specifies the string label for the Apply button. The default for this resource depends on the locale. In the C locale the default is Apply .

Now that some default localized label strings are provided through message catalogs for the children of composite widgets, the labelString resources cannot be set on the child through default resource files. Instead, the resource provided at the parent level must be used.

XmNcancelCallback

Specifies the list of callbacks called when the user activates the Cancel button. The callback reason is XmCR_CANCEL.

XmNcancelLabelString

Specifies the string label for the Cancel button. The default for this resource depends on the locale. In the C locale the default is Cancel .

XmNchildPlacement

Specifies the placement of the work area child. The possible values are

XmPLACE_ABOVE_SELECTION

Places the work area child above the Text area

XmPLACE_BELOW_SELECTION

Places the work area child below the Text area

XmPLACE_TOP

Places the work area child above the List area, and below a MenuBar, if one is present

XmNdialogType

Determines the set of SelectionBox children widgets that are created and managed at initialization. The possible values are

XmDIALOG_PROMPT

All standard children except the list and list label are created, and all except the Apply button are managed

XmDIALOG_COMMAND

Only the list, the selection label, and the text field are created and managed

XmDIALOG_SELECTION

All standard children are created and managed

XmDIALOG_FILE_SELECTION

All standard children are created and managed

XmDIALOG_WORK_AREA

All standard children are created, and all except the Apply button are managed

If the parent of the SelectionBox is a DialogShell, the default is XmDIALOG_SELECTION; otherwise, the default is XmDIALOG_WORK_AREA. XmCreatePromptDialog and XmCreateSelectionDialog set and append this resource to the creation arglist supplied by the application. This resource cannot be modified after creation.

XmNhelpLabelString

Specifies the string label for the Help button. The default for this resource depends on the locale. In the C locale the default is Help .

XmNlistItems

Specifies the items in the SelectionBox list. XtGetValues for this resource returns the list items themselves, not a copy of the list items. The application must not free the returned items.

XmNlistItemCount

Specifies the number of items in the SelectionBox list. The value must not be negative.

XmNlistLabelString

Specifies the string label to appear above the SelectionBox list containing the selection items. The default for this resource depends on the locale. In the C locale the default is Items unless XmNdialogType is XmDIALOG_PROMPT; in this case the default is NULL.

XmNlistVisibleItemCount

Specifies the number of items displayed in the SelectionBox list. The value must be greater than 0 (zero) unless XmNdialogType is XmDIALOG_PROMPT; in this case, the value is always 0. The default is dynamic based on the height of the list.

XmNminimizeButtons

Sets the buttons to the width of the widest button and height of the tallest button if False. If True, button width and height are not modified.

XmNmustMatch

Specifies whether the selection widget should check if the user's selection in the text edit field has an exact match in the SelectionBox list when the OK button is activated. If the selection does not have an exact match, and XmNmustMatch is True, the XmNnoMatchCallback callbacks are called. If the selection does have an exact match or if XmNmustMatch is False, XmNokCallback callbacks are called.

XmNnoMatchCallback

Specifies the list of callbacks called when the user makes a selection from the text edit field that does not have an exact match with any of the items in the list box. The callback reason is XmCR_NO_MATCH. Callbacks in this list are called only if XmNmustMatch is true.

XmNokCallback

Specifies the list of callbacks called when the user activates the OK button. The callback reason is XmCR_OK. If the selection text does not match a list item, and XmNmustMatch is True, the XmNnoMatchCallback callbacks are called instead.

XmNokLabelString

Specifies the string label for the OK button. The default for this resource depends on the locale. In the C locale the default is OK.

XmNselectionLabelString

Specifies the string label for the selection text edit field. The default for this resource depends on the locale. In the C locale the default is Selection .

XmNtextAccelerators

Specifies translations added to the Text widget child of the SelectionBox. The default includes bindings for the up and down keys for auto selection of list items. This resource is ignored if XmNaccelerators is initialized to a nondefault value.

XmNtextColumns

Specifies the number of columns in the Text widget. The value must be greater than 0 (zero).

XmNtextString

Specifies the text in the text edit selection field.

Inherited Resources

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

`XmBulletinBoard Resource Set`
`Name`	`Class`	`Type`	`Default`	`Access`
XmNallowOverlap	XmCAllowOverlap	Boolean	True	CSG
XmNautoUnmanage	XmCAutoUnmanage	Boolean	True	CG
XmNbuttonFontList	XmCButtonFontList	XmFontList	dynamic	CSG
XmNbuttonRenderTable	XmCButtonRenderTable	XmRenderTable	dynamic	CSG
XmNcancelButton	XmCWidget	Widget	dynamic	SG
XmNdefaultButton	XmCWidget	Widget	dynamic	SG
XmNdefaultPosition	XmCDefaultPosition	Boolean	True	CSG
XmNdialogStyle	XmCDialogStyle	unsigned char	dynamic	CSG
XmNdialogTitle	XmCDialogTitle	XmString	NULL	CSG
XmNfocusCallback	XmCCallback	XtCallbackList	NULL	C
XmNlabelFontList	XmCLabelFontList	XmFontList	dynamic	CSG
XmNlabelRenderTable	XmCLabelRenderTable	XmRenderTable	dynamic	CSG
XmNmapCallback	XmCCallback	XtCallbackList	NULL	C
XmNmarginHeight	XmCMarginHeight	Dimension	10	CSG
XmNmarginWidth	XmCMarginWidth	Dimension	10	CSG
XmNnoResize	XmCNoResize	Boolean	False	CSG
XmNresizePolicy	XmCResizePolicy	unsigned char	XmRESIZE_ANY	CSG
XmNshadowType	XmCShadowType	unsigned char	XmSHADOW_OUT	CSG
XmNtextFontList	XmCTextFontList	XmFontList	dynamic	CSG
XmNtextRenderTable	XmCTextRenderTable	XmRenderTable	dynamic	CSG
XmNtextTranslations	XmCTranslations	XtTranslations	NULL	C
XmNunmapCallback	XmCCallback	XtCallbackList	NULL	C

`XmManager 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
XmNhighlightPixmap	XmCHighlightPixmap	Pixmap	dynamic	CSG
XmNinitialFocus	XmCInitialFocus	Widget	dynamic	CSG
XmNlayoutDirection	XmCLayoutDirection	XmDirection	dynamic	CG
XmNnavigationType	XmCNavigationType	XmNavigationType	XmTAB_GROUP	CSG
XmNpopupHandlerCallback	XmCCallback	XtCallbackList	NULL	C
XmNshadowThickness	XmCShadowThickness	Dimension	dynamic	CSG
XmNstringDirection	XmCStringDirection	XmStringDirection	dynamic	CG
XmNtopShadowColor	XmCTopShadowColor	Pixel	dynamic	CSG
XmNtopShadowPixmap	XmCTopShadowPixmap	Pixmap	dynamic	CSG
XmNtraversalOn	XmCTraversalOn	Boolean	True	CSG
XmNunitType	XmCUnitType	unsigned char	dynamic	CSG
XmNuserData	XmCUserData	XtPointer	NULL	CSG

`Composite Resource Set`
`Name`	`Class`	`Type`	`Default`	`Access`
XmNchildren	XmCReadOnly	WidgetList	NULL	G
XmNinsertPosition	XmCInsertPosition	XtOrderProc	NULL	CSG
XmNnumChildren	XmCReadOnly	Cardinal	0	G

`Core Resource Set`
`Name`	`Class`	`Type`	`Default`	`Access`
XmNaccelerators	XmCAccelerators	XtAccelerators	dynamic	N/A
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;
        XmString 
value;
        int 
length;
} XmSelectionBoxCallbackStruct;

reason

Indicates why the callback was invoked

event

Points to the XEvent that triggered the callback

value

Indicates the XmString value selected by the user from the SelectionBox list or entered into the SelectionBox text field

length

Indicates the size in bytes of the XmString value This member is obsolete and exists for compatibility with earlier releases.

Translations

XmSelectionBox inherits translations from XmBulletinBoard.

Accelerators

The XmNtextAccelerators are added to the Text descendant of XmSelectionBox. The default accelerators are described in the following list.

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.

: KeyosfUp:

SelectionBoxUpOrDown( Previous)

: KeyosfDown:

SelectionBoxUpOrDown( Next)

: KeyosfBeginLine:

SelectionBoxUpOrDown( First)

: KeyosfEndLine:

SelectionBoxUpOrDown( Last)

: KeyosfRestore:

SelectionBoxRestore()

s c m a Keyspace :

SelectionBoxRestore()

Action Routines

The XmSelectionBox action routines are

SelectionBoxUpOrDown( Previous|Next|First|Last) :

When called with an argument of Previous , or 0 (zero) for compatibility, selects the previous item in the list and replaces the text with that item.

When called with an argument of Next , or 1 for compatibility, selects the next item in the list and replaces the text with that item.

When called with an argument of First , or 2 for compatibility, selects the first item in the list and replaces the text with that item.

When called with an argument of Last , or 3 for compatibility, selects the last item in the list and replaces the text with that item.

SelectionBoxRestore() :

Replaces the text value with the list selection. If no item in the list is selected, clears the text.

Additional Behavior

The SelectionBox widget has the following additional behavior:

KeyosfCancel:

Calls the activate callbacks for the cancel button if it is sensitive. If no cancel button exists and the parent of the SelectionBox is a manager, passes the event to the parent.

KeyosfActivate:

Calls the activate callbacks for the button with the keyboard focus. If no button has the keyboard focus, calls the activate callbacks for the default button if it is sensitive. In a List widget or single-line Text widget, the List or Text action associated with KeyosfActivate is called before the SelectionBox actions associated with KeyosfActivate. In a multiline Text widget, any KeyosfActivate event except KeyosfEnter calls the Text action associated with KeyosfActivate, then the SelectionBox actions associated with KeyosfActivate. If no button has the focus, no default button exists, and the parent of the SelectionBox is a manager, passes the event to the parent.

OK Button Activated:

If XmNmustMatch is True and the text does not match an item in the file list, calls the XmNnoMatchCallback callbacks with reason XmCR_NO_MATCH. Otherwise, calls the XmNokCallback callbacks with reason XmCR_OK.

Apply Button Activated:

Calls the XmNapplyCallback callbacks with reason XmCR_APPLY.

Cancel Button Activated:

Calls the XmNcancelCallback callbacks with reason XmCR_CANCEL.

Help Button Activated:

Calls the XmNhelpCallback callbacks with reason XmCR_HELP.

MapWindow:

Calls the callbacks for XmNmapCallback if the SelectionBox is a child of a Dialog shell.

UnmapWindow:

Calls the callbacks for XmNunmapCallback if the SelectionBox is the child of a DialogShell.

Virtual Bindings

The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings (3).

RELATED

Composite (3), Constraint (3), Core (3), XmBulletinBoard (3), XmCreateSelectionBox (3), XmCreateSelectionDialog (3), XmCreatePromptDialog (3), XmManager (3), and XmSelectionBoxGetChild (3).