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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:

  1. A scrolling list of alternatives

  2. An editable text field for the selected alternative

  3. Labels for the list and text field

  4. Three or four buttons
  5. 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 .

    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.

    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 .

    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.

    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.

    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.

    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.

    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.

    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 .

    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.

    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).


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