XmList(library call)

NAME
XmList — The List widget class

SYNOPSIS

#include <Xm/List.h>

DESCRIPTION

List allows a user to select one or more items from a group of choices. Items are selected from the list in a variety of ways, using both the pointer and the keyboard. List operates on an array of compound strings that are defined by the application. Each compound string becomes an item in the List, with the first compound string becoming the item in position 1, the second becoming the item in position 2, and so on.

Specifying the number of items that are visible sets the size of the List. If the number of visible items is not specified, the height of the list controls the number of visible items. Each item assumes the height of the tallest element in the list. To create a list that allows the user to scroll easily through a large number of items, use the XmCreateScrolledList convenience function.

To select items, move the pointer or cursor to the desired item and press the <Btn1> mouse button or the key defined as <osfSelect>. There are several styles of selection behavior, and they all highlight the selected item or items by displaying them in inverse colors. An appropriate callback is invoked to notify the application of the user's choice. The application then takes whatever action is required for the specified selection. When a List is insensitive, all of the list items are displayed in a stippled fill pattern.

List uses the XmQTspecifyRenderTable, XmQTscrollFrame, and XmQTnavigator traits, and holds the XmQTtransfer trait.

  Selection

Each list has one of four selection models:

•   Single Select

•   Browse Select

•   Multiple Select

•   Extended Select

In Single Select and Browse Select, at most one item is selected at a time. In Single Select, pressing <Btn1> on an item toggles its selection state and deselects any other selected item. In Browse Select, pressing <Btn1> on an item selects it and deselects any other selected item; dragging <Btn1> moves the selection as the pointer is moved. Releasing <Btn1> on an item moves the location cursor to that item.

In Multiple Select, any number of items can be selected at a time. Pressing <Btn1> on an item toggles its selection state but does not deselect any other selected items.

In Extended Select, any number of items can be selected at a time, and the user can easily select ranges of items. Pressing <Btn1> on an item selects it and deselects any other selected item. Dragging <Btn1> or pressing or dragging <Shift><Btn1> following a <Btn1> action selects all items between the item under the pointer and the item on which <Btn1> was pressed. This action also deselects any other selected items outside that range.

Extended Select also allows the user to select and deselect discontiguous ranges of items. Pressing <Ctrl><Btn1> on an item toggles its selection state but does not deselect any other selected items. Dragging <Ctrl><Btn1> or pressing or dragging <Shift><Btn1> following a <Ctrl><Btn1> action sets the selection state of all items between the item under the pointer and the item on which <Ctrl><Btn1> was pressed to the state of the item on which <Ctrl><Btn1> was pressed. This action does not deselect any other selected items outside that range.

All selection operations available from the mouse are also available from the keyboard. List has two keyboard selection modes, Normal Mode and Add Mode. In Normal Mode, navigation operations and <osfSelect> select the item at the location cursor and deselect any other selected items. In Add Mode, navigation operations have no effect on selection, and <osfSelect> toggles the selection state of the item at the location cursor without deselecting any other selected items, except in Single Select.

Single and Multiple Select use Add Mode, and Browse Select uses Normal Mode.

Extended Select can use either mode; the user changes modes by pressing <osfAddMode>. In Extended Select Normal Mode, pressing <osfSelect> has the same effect as pressing <Btn1>; <osfExtend> and shifted navigation have the same effect as pressing <Shift><Btn1> following a <Btn1> action. In Extended Select Add Mode, pressing <osfSelect> has the same effect as pressing <Ctrl><Btn1>; <osfExtend> and shifted navigation have the same effect as pressing <Shift><Btn1> following a <Ctrl><Btn1> action.

Normal Mode is indicated by a solid location cursor, and Add Mode is indicated by a dashed location cursor.

  Data Transfer Behavior

List supports dragging of items from the List and transfer of items to the clipboard. When the user presses BTransfer on a selected item, the widget transfers all selected items. When the user presses BTransfer on an unselected item, the widget transfers only that item. Depending on the value of XmNprimaryOwnership, List can also support primary selection.

When the XmNconvertCallback procedures are called, the location_data member of the XmConvertCallbackStruct member is NULL if the selected items are being transferred. If the selected items are not being transferred, this member has the following value: If a single item is being transferred, the value is an integer representing the position of the item in the List. A value of 1 transfers the first item in the List; a value of 2 transfers the second item; and so on. If the entire contents of the List are being transferred, the value is -1.

As a source of data, List supports the following targets and associated conversions of data to these targets:

locale
    If the locale target matches the widget's locale, the widget transfers the selected list items in the encoding of the locale. Each item transferred except the last includes a trailing separator.

COMPOUND_TEXT
    The widget transfers the selected list items as type COMPOUND_TEXT. Each item transferred except the last includes a trailing separator.

UTF8_STRING
    The widget transfers the selected list items as type UTF8_STRING. Each item transferred except the last includes a trailing separator.

STRING
    The widget transfers the selected list items as type STRING. Each item transferred except the last includes a trailing separator.

TEXT
    If the selected list items are fully convertible to the encoding of the locale, the widget transfers the selected list items in the encoding of the locale. Otherwise, the widget transfers the selected list items as type COMPOUND_TEXT. Each item transferred except the last includes a trailing separator.

_MOTIF_CLIPBOARD_TARGETS
    The widget transfers, as type ATOM, a list of the targets it supports for immediate transfer for the CLIPBOARD selection. These include _MOTIF_COMPOUND_STRING. If the selected list items are fully convertible to STRING, these also include STRING; otherwise, they also include COMPOUND_TEXT and UTF8_STRING.

_MOTIF_COMPOUND_STRING
    The widget transfers the selected list items as a compound string in Byte Stream format. Each item transferred except the last includes a trailing separator.

_MOTIF_DEFERRED_CLIPBOARD_TARGETS
    The widget transfers, as type ATOM, a list of the targets it supports for delayed transfer for the CLIPBOARD selection. This widget currently supplies no targets for _MOTIF_DEFERRED_CLIPBOARD_TARGETS.

_MOTIF_EXPORT_TARGETS
    The widget transfers, as type ATOM, a list of the targets to be used as the value of the DragContext's XmNexportTargets in a drag-and-drop transfer. These include _MOTIF_COMPOUND_STRING, COMPOUND_TEXT, UTF8_STRING, the encoding of the locale, STRING, TEXT, BACKGROUND, and FOREGROUND.

_MOTIF_LOSE_SELECTION
    When the widget loses the selection, it deselects all list items.

As a source of data, List also supports the following standard Motif targets:

BACKGROUND
    The widget transfers XmNbackground as type PIXEL.

CLASS
    The widget finds the first shell in the widget hierarchy that has a WM_CLASS property and transfers the contents as text in the current locale.

CLIENT_WINDOW
    The widget finds the first shell in the widget hierarchy and transfers its window as type WINDOW.

COLORMAP
    The widget transfers XmNcolormap as type COLORMAP.

FOREGROUND
    The widget transfers XmNforeground as type PIXEL.

NAME
    The widget finds the first shell in the widget hierarchy that has a WM_NAME property and transfers the contents as text in the current locale.

TARGETS
    The widget transfers, as type ATOM, a list of the targets it supports. These include the standard targets in this list. These also include _MOTIF_COMPOUND_STRING, COMPOUND_TEXT, UTF8_STRING the encoding of the locale, STRING, and TEXT.

TIMESTAMP
    The widget transfers the timestamp used to acquire the selection as type INTEGER.

_MOTIF_RENDER_TABLE
    The widget transfers XmNrenderTable if it exists, or else the default text render table, as type STRING.

_MOTIF_ENCODING_REGISTRY
    The widget transfers its encoding registry as type STRING. The value is a list of NULL separated items in the form of tag encoding pairs. This target symbolizes the transfer target for the Motif Segment Encoding Registry. Widgets and applications can use this Registry to register text encoding formats for specified render table tags. Applications access this Registry by calling XmRegisterSegmentEncoding and XmMapSegmentEncoding.

List has no widget class destination procedure. Subclasses and the XmNdestinationCallback procedures are responsible for any data transfers to the widget.

  Classes

List inherits behavior, resources, and traits from Core and XmPrimitive.

The class pointer is xmListWidgetClass.

The class name is XmList.

  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).

XmList Resource Set
NameClassTypeDefaultAccess
_____
XmNautomaticSelectionXmCAutomaticSelectionXtEnumFalseCSG
_____
XmNbrowseSelectionCallbackXmCCallbackXtCallbackListNULLC
_____
XmNdefaultActionCallbackXmCCallbackXtCallbackListNULLC
_____
XmNdestinationCallbackXmCCallbackXtCallbackListNULLC
_____
XmNdoubleClickIntervalXmCDoubleClickIntervalintdynamicCSG
_____
XmNextendedSelectionCallbackXmCCallbackXtCallbackListNULLC
_____
XmNfontListXmCFontListXmFontListdynamicCSG
_____
XmNitemCountXmCItemCountint0CSG
_____
XmNitemsXmCItemsXmStringTableNULLCSG
_____
XmNlistMarginHeightXmCListMarginHeightDimension0CSG
_____
XmNlistMarginWidthXmCListMarginWidthDimension0CSG
_____
XmNlistSizePolicyXmCListSizePolicyunsigned charXmVARIABLECG
_____
XmNlistSpacingXmCListSpacingDimension0CSG
_____
XmNmatchBehaviorXmCMatchBehaviorunsigned charXmQUICK_NAVIGATECSG
_____
XmNmultipleSelectionCallbackXmCCallbackXtCallbackListNULLC
_____
XmNprimaryOwnershipXmCPrimaryOwnershipunsigned charXmOWN_NEVERCSG
_____
XmNrenderTableXmCRenderTableXmRenderTabledynamicCSG
_____
XmNscrollBarDisplayPolicyXmCScrollBarDisplayPolicyunsigned charXmAS_NEEDEDCSG
_____
XmNselectColorXmCSelectColorXmRSelectColorXmREVERSED_GROUND_COLORSCSG
_____
XmNselectedItemCountXmCSelectedItemCountint0CSG
_____
XmNselectedItemsXmCSelectedItemsXmStringTableNULLCSG
_____
XmNselectedPositionCountXmCSelectedPositionCountint0CSG
_____
XmNselectedPositionsXmCSelectedPositionsunsigned int *NULLCSG
_____
XmNselectionModeXmCSelectionModeunsigned chardynamicCSG
_____
XmNselectionPolicyXmCSelectionPolicyunsigned charXmBROWSE_SELECTCSG
_____
XmNsingleSelectionCallbackXmCCallbackXtCallbackListNULLC
_____
XmNstringDirectionXmCStringDirectionXmStringDirectiondynamicCSG
_____
XmNtopItemPositionXmCTopItemPositionint1CSG
_____
XmNvisibleItemCountXmCVisibleItemCountintdynamicCSG
_____

XmNautomaticSelection
    Invokes either XmNbrowseSelectionCallback or XmNextendedSelectionCallback when <Btn1> is pressed and the items that are shown as selected change if the value is True (or XmAUTO) and the selection mode is either XmBROWSE_SELECT or XmEXTENDED_SELECT respectively. If False (XmNO_AUTO_SELECT), no selection callbacks are invoked until the user releases the mouse button. See Behavior for further details on the interaction of this resource with the selection modes.

XmNbrowseSelectionCallback
    Specifies a list of callbacks that is called when an item is selected in the browse selection mode. The reason is XmCR_BROWSE_SELECT.

XmNdefaultActionCallback
    Specifies a list of callbacks that is called when an item is double clicked or <osfActivate> is pressed. The reason is XmCR_DEFAULT_ACTION.

XmNdestinationCallback
    Specifies a list of callbacks called when the List is the destination of a transfer operation. The type of the structure whose address is passed to these callbacks is XmDestinationCallbackStruct. The reason is XmCR_OK.

XmNdoubleClickInterval
    If a button click is followed by another button click within the time span specified by this resource (in milliseconds), the button clicks are considered a double-click action, rather than two single-click actions. The value must not be negative. The default value is the display's multiclick time.

XmNextendedSelectionCallback
    Specifies a list of callbacks that is called when items are selected using the extended selection mode. The reason is XmCR_EXTENDED_SELECT.

XmNfontList
    Specifies the font list associated with the list items. XmNfontList is obsolete and exists only for compatibility with previous releases. You should now use XmNrenderTable instead of XmNfontList. If both are specified, the render table will take precedence. The font list is used in conjunction with the XmNvisibleItemCount resource to determine the height of the List widget. If this value is NULL at initialization, the parent hierarchy of the widget is searched for a widget that holds the XmQTspecifyRenderTable trait. If such an ancestor is found, the font list is initialized to the XmTEXT_RENDER_TABLE value of the ancestor widget. If no such widget is found, the default is implementation dependent. Refer to XmFontList(3) for more information on a font list structure.

XmNitemCount
    Specifies the total number of items. The value must be the number of items in XmNitems and must not be negative. It is automatically updated by the list whenever an item is added to or deleted from the list.

XmNitems
    Points to an array of compound strings that are to be displayed as the list items. Refer to XmString(3) for more information on the creation and structure of compound strings. XtGetValues for this resource returns the list items themselves, not a copy of the list items. The application must not free the returned items.

XmNlistMarginHeight
    Specifies the height of the margin between the list border and the items.

XmNlistMarginWidth
    Specifies the width of the margin between the list border and the items.

XmNlistSizePolicy
    Controls the reaction of the List when an item grows horizontally beyond the current size of the list work area. If the value is XmCONSTANT, the list viewing area does not grow, and a horizontal ScrollBar is added for a List whose parent is a ScrolledWindow. If this resource is set to XmVARIABLE, the List grows to match the size of the longest item, and no horizontal ScrollBar appears.

    When the value of this resource is XmRESIZE_IF_POSSIBLE, the List attempts to grow or shrink to match the width of the widest item. If it cannot grow to match the widest size, a horizontal ScrollBar is added for a List whose parent is a ScrolledWindow if the longest item is wider than the list viewing area.

    The size policy must be set at the time the List widget is created. It cannot be changed at a later time through XtSetValues.

XmNlistSpacing
    Specifies the spacing between list items. This spacing increases by the value of the XmNhighlightThickness resource in Primitive.

XmNmatchBehavior
    Specifies the matching behavior followed by XmList. The current values are XmNONE and XmQUICK_NAVIGATE, as follows:

    XmNONE
        Specifies that the typed in characters are ignored.

    XmQUICK_NAVIGATE
        Specifies that 1-character navigation shall be supported when List has focus. If the typed character is the initial character of some set of items in List, the first of those items following the current item will be navigated to (become the current item). If all such items precede the current item, the first such item becomes the current item. Subsequently, typing the same character will cyclically navigate among the items with the same first character.

XmNmultipleSelectionCallback
    Specifies a list of callbacks that is called when an item is selected in multiple selection mode. The reason is XmCR_MULTIPLE_SELECT.

XmNprimaryOwnership
    Specifies whether XmContainer takes ownership of the Primary selection when a selection is made inside it. This resource can take the following values:

    XmOWN_NEVER
        Never takes ownership.

    XmOWN_ALWAYS
        Always takes ownership.

    XmOWN_MULTIPLE
        Only takes ownership is more than one element has been selected.

    XmOWN_POSSIBLE_MULTIPLE
        Only takes ownership if more than one element can be selected at a time.

XmNrenderTable
    Specifies the render table associated with the list items. The render table is used in conjunction with the XmNvisibleItemCount resource to determine the height of the List widget. If this value is NULL at initialization, List searches its parent hierarchy for a widget that holds the XmQTspecifyRenderTable trait. If such an ancestor is found, the render table is initialized to the XmTEXT_RENDER_TABLE value of the ancestor widget. If no such widget is found, the default is implementation dependent. If a font list and a render table are both specified, the render table will take precedence. Refer to XmRenderTable(3) for more information on the creation and structure of a render table.

XmNscrollBarDisplayPolicy
    Controls the display of vertical ScrollBars in a List whose parent is a ScrolledWindow. When the value of this resource is XmAS_NEEDED, a vertical ScrollBar is displayed only when the number of items in the List exceeds the number of visible items. When the value is XmSTATIC, a vertical ScrollBar is always displayed.

XmNselectColor
    Allows the application to specify the color of the background rectangle that indicates selected text. It takes two values:

    XmDEFAULT_SELECT_COLOR
        Causes the select color to be set to a color between the background and the bottom shadow color.

    XmREVERSED_GROUND_COLORS
        Forces the select color to the foreground color and the color of any text rendered over the select color to be in the background color.

    HIGHLIGHT_COLOR
        Forces the fill color to use the highlight color.

XmNselectedItemCount
    Specifies the number of strings in the selected items list. The value must be the number of items in XmNselectedItems and must not be negative.

XmNselectedItems
    Points to an array of compound strings that represents the list items that are currently selected, either by the user or by the application. XtGetValues for this resource returns the list items themselves, not a copy of the list items. The application must not free the returned items or the array.

    Setting XmNselectedItems selects those list items that exactly match items in the given XmNselectedItems list. There may be additional items in XmNselectedItems that do not match items in the list. These items remain until XmNselectedItems is updated. If XmNitems is changed such that the list now contains items matching previously unmatched items in XmNselectedItems, those new items will also appear selected.

    Any user interaction with the list that causes at least one item to be selected or deselected and any call to XmListDeleteAllItems, XmListDeleteItem, XmListDeleteItems, XmListDeleteItemsPos, XmListDeletePos, XmListDeletePositions, XmListDeselectAllItems, XmListDeselectItem, XmListDeselectPos, XmListSelectItem, XmListSelectPos, or XmListUpdateSelectedList cause XmNselectedItems to be updated immediately to exactly reflect the visual state of the list. Calls to any other XmList functions do not affect XmNselectedItems.

XmNselectedPositionCount
    Specifies the number of positions in the selected positions list. The value must be the number of items in XmNselectedPositions

XmNselectedPositions
    Points to an array of the positions of the selected items in the 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 or the array.

XmNselectionMode
    Defines what effect keyboard navigations have on selection. The valid modes are:

    XmADD_MODE
        Allows no navigation operations to have effect on selection, and <osfSelect> toggles the selection state of the item at the location cursor without deselecting any other selected items, except in Single Select. However, the widget cannot be put into add mode if the XmNselectionPolicy resource is an incompatible mode (XmNselectionPolicy cannot be XmBROWSE_SELECT).

    XmNORMAL_MODE
        Allows navigation operations and <osfSelect> to select the item at the location cursor and deselect any other selected items. However, the widget cannot be put into normal mode if the XmNselectionPolicy resource is an incompatible mode (XmNselectionPolicy cannot be XmSINGLE_SELECT or XmMULTIPLE_SELECT).

XmNselectionPolicy
    Defines the interpretation of the selection action. This can be one of the following:

    XmSINGLE_SELECT
        Allows only single selections

    XmMULTIPLE_SELECT
        Allows multiple selections

    XmEXTENDED_SELECT
        Allows extended selections

    XmBROWSE_SELECT
        Allows drag-and-browse functionality

XmNsingleSelectionCallback
    Specifies a list of callbacks that is called when an item is selected in single selection mode. The reason is XmCR_SINGLE_SELECT.

XmNstringDirection
    Is a synthetic resource for setting XmNlayoutDirection. The values for this resource are XmSTRING_DIRECTION_L_TO_R and XmSTRING_DIRECTION_R_TO_L. Refer to the XmNlayoutDirection resource description. The XmNstringDirection resource is obsoleted by XmNlayoutDirection, but is kept here for backward compatibility.

XmNtopItemPosition
    Specifies the position of the item that is the first visible item in the list. Setting this resource is equivalent to calling the XmListSetPos function. The position of the first item in the list is 1; the position of the second item is 2; and so on. A position of 0 (zero) specifies the last item in the list. The value must not be negative.

XmNvisibleItemCount
    Specifies the number of items that can fit in the visible space of the list work area. The List uses this value to determine its height. The value must be greater than 0 (zero).

  Inherited Resources

List 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.

XmPrimitive Resource Set
NameClassTypeDefaultAccess
_____
XmNbottomShadowColorXmCBottomShadowColorPixeldynamicCSG
_____
XmNbottomShadowPixmapXmCBottomShadowPixmapPixmapXmUNSPECIFIED_PIXMAPCSG
_____
XmNconvertCallbackXmCCallbackXtCallbackListNULLC
_____
XmNforegroundXmCForegroundPixeldynamicCSG
_____
XmNhelpCallbackXmCCallbackXtCallbackListNULLC
_____
XmNhighlightColorXmCHighlightColorPixeldynamicCSG
_____
XmNhighlightOnEnterXmCHighlightOnEnterBooleanFalseCSG
_____
XmNhighlightPixmapXmCHighlightPixmapPixmapdynamicCSG
_____
XmNhighlightThicknessXmCHighlightThicknessDimension2CSG
_____
XmNlayoutDirectionXmCLayoutDirectionXmDirectiondynamicCG
_____
XmNnavigationTypeXmCNavigationTypeXmNavigationTypeXmTAB_GROUPCSG
_____
XmNpopupHandlerCallbackXmCCallbackXtCallbackListNULLC
_____
XmNshadowThicknessXmCShadowThicknessDimension2CSG
_____
XmNtopShadowColorXmCTopShadowColorPixeldynamicCSG
_____
XmNtopShadowPixmapXmCTopShadowPixmapPixmapdynamicCSG
_____
XmNtraversalOnXmCTraversalOnBooleanTrueCSG
_____
XmNunitTypeXmCUnitTypeunsigned chardynamicCSG
_____
XmNuserDataXmCUserDataXtPointerNULLCSG
_____

Core Resource Set
NameClassTypeDefaultAccess
_____
XmNacceleratorsXmCAcceleratorsXtAcceleratorsdynamicCSG
_____
XmNancestorSensitiveXmCSensitiveBooleandynamicG
_____
XmNbackgroundXmCBackgroundPixeldynamicCSG
_____
XmNbackgroundPixmapXmCPixmapPixmapXmUNSPECIFIED_PIXMAPCSG
_____
XmNborderColorXmCBorderColorPixelXtDefaultForegroundCSG
_____
XmNborderPixmapXmCPixmapPixmapXmUNSPECIFIED_PIXMAPCSG
_____
XmNborderWidthXmCBorderWidthDimension0CSG
_____
XmNcolormapXmCColormapColormapdynamicCG
_____
XmNdepthXmCDepthintdynamicCG
_____
XmNdestroyCallbackXmCCallbackXtCallbackListNULLC
_____
XmNheightXmCHeightDimensiondynamicCSG
_____
XmNinitialResourcesPersistentXmCInitialResourcesPersistentBooleanTrueC
_____
XmNmappedWhenManagedXmCMappedWhenManagedBooleanTrueCSG
_____
XmNscreenXmCScreenScreen *dynamicCG
_____
XmNsensitiveXmCSensitiveBooleanTrueCSG
_____
XmNtranslationsXmCTranslationsXtTranslationsdynamicCSG
_____
XmNwidthXmCWidthDimensiondynamicCSG
_____
XmNxXmCPositionPosition0CSG
_____
XmNyXmCPositionPosition0CSG
_____

  Callback Information

List defines a new callback structure. The application must first look at the reason field and use only the structure members that are valid for that particular reason, because not all fields are relevant for every possible reason. The callback structure is defined as follows:

typedef struct
{
        int reason;
        XEvent *event;
        XmString item;
        int item_length;
        int item_position;
        XmString *selected_items;
        int selected_item_count;
        int *selected_item_positions;
        char selection_type;
        unsigned char auto_selection_type;
} XmListCallbackStruct;

reason
    Indicates why the callback was invoked.

event
    Points to the XEvent that triggered the callback. It can be NULL.

item
    The last item selected at the time of the event that caused the callback. item points to a temporary storage space that is reused after the callback is finished. Therefore, if an application needs to save the item, it should copy the item into its own data space.

item_length
    The length in bytes of item. This member is obsolete and exists for compatibility with earlier releases.

item_position
    The position (plus one) of item in the List's XmNitems array. An item_position value of one symbolizes the first element in the list.

selected_items
    A list of items selected at the time of the event that caused the callback. selected_items points to a temporary storage space that is reused after the callback is finished. Therefore, if an application needs to save the selected list, it should copy the list into its own data space.

selected_item_count
    The number of items in the selected_items list. This number must be non-negative.

selected_item_positions
    An array of integers, one for each selected item, representing the position of each selected item in the List's XmNitems array. selected_item_positions points to a temporary storage space that is reused after the callback is finished. Therefore, if an application needs to save this array, it should copy the array into its own data space.

selection_type
    Indicates that the most recent extended selection was the initial selection (XmINITIAL), a modification of an existing selection (XmMODIFICATION), or an additional noncontiguous selection (XmADDITION).

auto_selection_type
    Indicates the type of automatic selection callback. The types of callbacks include the following:

    XmAUTO_BEGIN
        Indicates the beginning of automatic selection.

    XmAUTO_MOTION
        Indicates that there is a button drag selection.

    XmAUTO_CANCEL
        Indicates that the new selection is cancelled.

    XmAUTO_NO_CHANGE
        Indicates that the currently selected item matches the initial item.

    XmAUTO_CHANGE
        Indicates that the currently selected item does not match the initial item.

The following table describes the reasons for which the individual callback structure fields are valid.
ReasonValid Fields
__
XmCR_SINGLE_SELECTT{
reason, event, item, item_length, item_position
T}
__
XmCR_DEFAULT_ACTIONT{
reason, event, item, item_length, item_position, selected_items, selected_item_count, selected_item_positions
T}
__
XmCR_BROWSE_SELECTT{
reason, event, item, item_length, item_position
T}
__
XmCR_MULTIPLE_SELECTT{
reason, event, item, item_length, item_position, selected_items, selected_item_count, selected_item_positions
T}
__
XmCR_EXTENDED_SELECTT{
reason, event, item, item_length, item_position, selected_items, selected_item_count, selected_item_positions, selection_type
T}
__

A pointer to the following callback structure is passed to the XmNdestinationCallback procedures:

typedef struct
{
        int reason;
        XEvent *event;
        Atom selection;
        XtEnum operation;
        int flags;
        XtPointer transfer_id;
        XtPointer destination_data;
        XtPointer location_data;
        Time time;
} XmDestinationCallbackStruct;

reason
    Indicates why the callback was invoked.

event
    Points to the XEvent that triggered the callback. It can be NULL.

selection
    Indicates the selection for which data transfer is being requested. Possible values are CLIPBOARD, PRIMARY, SECONDARY, and _MOTIF_DROP.

operation
    Indicates the type of transfer operation requested.

    •   When the selection is PRIMARY, possible values are XmMOVE, XmCOPY, and XmLINK.

    •   When the selection is SECONDARY or CLIPBOARD, possible values are XmCOPY and XmLINK.

    •   When the selection is _MOTIF_DROP, possible values are XmMOVE, XmCOPY, XmLINK, and XmOTHER. A value of XmOTHER means that the callback procedure must get further information from the XmDropProcCallbackStruct in the destination_data member.

flags
    Indicates whether or not the destination widget is also the source of the data to be transferred. Following are the possible values:

    XmCONVERTING_NONE
        The destination widget is not the source of the data to be transferred.

    XmCONVERTING_SAME
        The destination widget is the source of the data to be transferred.

transfer_id
    Serves as a unique ID to identify the transfer transaction.

destination_data
    Contains information about the destination. When the selection is _MOTIF_DROP, the callback procedures are called by the drop site's XmNdropProc, and destination_data is a pointer to the XmDropProcCallbackStruct passed to the XmNdropProc procedure. When the selection is SECONDARY, destination_data is an Atom representing a target recommmended by the selection owner for use in converting the selection. Otherwise, destination_data is NULL.

location_data
    Contains information about the location where data is to be transferred. The value is always NULL when the selection is SECONDARY or CLIPBOARD. If the value is NULL, the data is to be inserted at the widget's cursor position. Otherwise, the value is an integer representing the position in the List where the items are to be transferred. A value of 1 makes the first new item the first item in the list; a value of 2 makes it the second item; and so on. Once XmTransferDone procedures start to be called, location_data will no longer be stable.

time
    Indicates the time when the transfer operation began.

  Translations

XmList includes translations from Primitive. The XmList translations 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.

<Btn1><Motion>:
    ListButtonMotion()

s ~m ~a <Btn1Down>:
    ListBeginExtend()

s ~m ~a <Btn1Up>:
    ListEndExtend()

c ~s ~m ~a <Btn1Down>:
    ListBeginToggle()

c ~s ~m ~a <Btn1Up>:
    ListEndToggle()

~s ~c ~m ~a <Btn1Down>:
    ListBeginSelect()

~s ~c ~m ~a <Btn1Up>:
    ListEndSelect()

<Btn2Down>:
    ListProcessDrag()

:s c <Key><osfBeginLine>:
    ListBeginDataExtend()

:c <Key><osfBeginLine>:
    ListBeginData()

:<Key><osfBeginLine>:
    ListBeginLine()

:s c <Key><osfEndLine>:
    ListEndDataExtend()

:c <Key><osfEndLine>:
    ListEndData()

:<Key><osfEndLine>:
    ListEndLine()

:<Key><osfPageLeft>:
    ListLeftPage()

:c <Key><osfPageUp>:
    ListLeftPage()

:<Key><osfPageUp>:
    ListPrevPage()

:<Key><osfPageRight>:
    ListRightPage()

:c <Key><osfPageDown>:
    ListRightPage()

:<Key><osfPageDown>:
    ListNextPage()

s <KeyDown><osfSelect>:
    ListKbdBeginExtend()

:<KeyDown><osfSelect>:
    ListKbdBeginSelect()

:s <KeyUp><osfSelect>:
    ListKbdEndExtend()

:<KeyUp><osfSelect>:
    ListKbdEndSelect()

:<Key><osfSelectAll>:
    ListKbdSelectAll()

:<Key><osfDeselectAll>:
    ListKbdDeSelectAll()

:<Key><osfActivate>:
    ListKbdActivate()

:<Key><osfAddMode>:
    ListAddMode()

:<Key><osfHelp>:
    PrimitiveHelp()

:<Key><osfCancel>:
    ListKbdCancel()

:c <Key><osfLeft>:
    ListLeftPage()

:<Key><osfLeft>:
    ListLeftChar()

:c <Key><osfRight>:
    ListRightPage()

:<Key><osfRight>:
    ListRightChar()

:s <Key><osfUp>:
    ListExtendPrevItem()

:<Key><osfUp>:
    ListPrevItem()

:s <Key><osfDown>:
    ListExtendNextItem()

:<Key><osfDown>:
    ListNextItem()

:c <Key><osfInsert>:
    ListCopyToClipboard()

:<Key><osfCopy>:
    ListCopyToClipboard()

~s c ~m ~a <Key>slash:
    ListKbdSelectAll()

~s c ~m ~a <Key>backslash:
    ListKbdDeSelectAll()

s ~m ~a <Key>Tab:
    PrimitivePrevTabGroup()

~m ~a <Key>Tab:
    PrimitiveNextTabGroup()

~s ~m ~a <Key>Return:
    ListKbdActivate()

~s ~m ~a <KeyDown>space:
    ListKbdBeginSelect()

~s ~m ~a <KeyUp>space:
    ListKbdEndSelect()

s ~m ~a <KeyDown>space:
    ListKbdBeginExtend()

s ~m ~a <KeyUp>space:
    ListKbdEndExtend()

<Key>:
    ListQuickNavigate()

The List button event translations are modified when Display's XmNenableBtn1Transfer resource does not have a value of XmOFF (in other words, it is either XmBUTTON2_TRANSFER or XmBUTTON2_ADJUST). This option allows the actions for selection and transfer to be integrated on <Btn1>, and the actions for extending the selection can be bound to <Btn2>. The actions for <Btn1> that are defined above still apply when the <Btn1> event occurs over text that is not selected. The following actions apply when the <Btn1> event occurs over text that is selected:

<Btn1Motion>:
    ListProcessBtn1(ListButtonMotion)

s ~m ~a <Btn1Down>
    ListProcessBtn1(ListBeginExtend)

s ~m ~a <Btn1Up>
    ListProcessBtn1(ListEndExtend)

c ~s ~m ~a <Btn1Down>
    ListProcessBtn1(ListBeginToggle)

c ~s ~m ~a <Btn1Up>
    ListProcessBtn1(ListEndToggle)

~s ~c ~m ~a <Btn1Down>
    ListProcessBtn1(ListBeginSelect)

~s ~c ~m ~a <Btn1Up>
    ListProcessBtn1(ListEndSelect)

When Display's XmNenableBtn1Transfer resource has a value of XmBUTTON2_ADJUST, the following actions apply:

<Btn2Down>:
    ListProcessBtn2(ListBeginExtend)

<Btn2Motion>:
    ListProcessBtn2(ListButtonMotion)

<Btn2Up>:
    ListProcessBtn2(ListEndExtend)

  Action Routines

The XmList action routines are described in the following list. The current selection is always shown with inverted colors.

ListAddMode():
    Toggles the state of Add Mode for keyboard selection.

ListBeginData():
    Moves the location cursor to the first item in the list. In Normal Mode, this also deselects any current selection, selects the first item in the list, and calls the appropriate selection callbacks (XmNbrowseSelectionCallback when XmNselectionPolicy is set to XmBROWSE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

ListBeginDataExtend():
    If XmNselectionPolicy is set to XmMULTIPLE_SELECT or XmEXTENDED_SELECT, this action moves the location cursor to the first item in the list.

    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done; changes the selection state of the first item and all items between it and the current anchor point to the state of the item at the current anchor point; calls the XmNextendedSelectionCallback callbacks.

ListBeginExtend():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done, and changes the selection state of the item under the pointer and all items between it and the current anchor point to the state of the item at the current anchor point. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN.

ListBeginLine():
    Moves the horizontal scroll region to the beginning of the line.

ListBeginSelect():
    If XmNselectionPolicy is set to XmSINGLE_SELECT, deselects any current selection and toggles the selection state of the item under the pointer.

    If XmNselectionPolicy is set to XmBROWSE_SELECT, deselects any current selection and selects the item under the pointer. If XmNautomaticSelection is set to True, calls the XmNbrowseSelectionCallback callbacks. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN.

    If XmNselectionPolicy is set to XmMULTIPLE_SELECT, toggles the selection state of the item under the pointer. Any previous selections remain.

    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action deselects any current selection, selects the item under the pointer, and sets the current anchor at that item. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN.

ListBeginToggle():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action moves the current anchor to the item under the pointer without changing the current selection. If the item is unselected, this action selects it; if the item is selected, this action unselects it. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks.

    Otherwise, the list takes keyboard focus. No other action occurs. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN.

ListButtonMotion():
    If XmNselectionPolicy is set to XmBROWSE_SELECT, this action deselects any current selection and selects the item under the pointer. If XmNautomaticSelection is set to True and the pointer has entered a new list item, this action calls the XmNbrowseSelectionCallback callbacks.

    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection is being made and an extended selection has previously been made from the current anchor point, restores the selection state of the items in that range to their state before the previous extended selection was done and changes the selection state of the item under the pointer and all items between it and the current anchor point to the state of the item at the current anchor point. If XmNautomaticSelection is set to True and the pointer has entered a new list item, calls the XmNextendedSelectionCallback callbacks.

    If the pointer leaves a scrolled list, this action scrolls the list in the direction of the pointer motion. The auto_selection_type component of the callback structure will be set to XmAUTO_MOTION.

ListCopyToClipboard()
    Copies the content of the selected items to the clipboard as a single compound string with each item separated by a newline. This action calls the XmNconvertCallback procedures, possibly multiple times, for the CLIPBOARD selection.

ListEndData():
    Moves the location cursor to the last item in the list. In Normal Mode, this also deselects any current selection, selects the last item in the list, and calls the appropriate selection callbacks (XmNbrowseSelectionCallback when XmNselectionPolicy is set to XmBROWSE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

ListEndDataExtend():
    If XmNselectionPolicy is set to XmMULTIPLE_SELECT or XmEXTENDED_SELECT, this action moves the location cursor to the last item in the list.

    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done; changes the selection state of the last item and all items between it and the current anchor point to the state of the item at the current anchor point; calls the XmNextendedSelectionCallback callbacks.

ListEndExtend():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action moves the location cursor to the last item selected or deselected and calls the XmNextendedSelectionCallback callbacks.

    If XmNautomaticSelection is set to True, then the auto_selection_type field of the callback will be valid. If XmNselectionPolicy is set to XmBROWSE_SELECT and the currently selected item position matches the position of the item that was selected before the browse selection began, or if XmNselectionPolicy is set to XmEXTENDED_SELECT and the set of currently selected item positions matches the set of item positions selected before the extended selection began, the callback will be called with auto_selection_type set to XmAUTO_NO_CHANGE. Otherwise, it will be set to XmAUTO_CHANGE.

ListEndLine():
    Moves the horizontal scroll region to the end of the line.

ListEndSelect():
    This action moves the location cursor to the last item selected or deselected and calls the appropriate selection callbacks (XmNsingleSelectionCallback when XmNselectionPolicy is set to XmSINGLE_SELECT, XmNbrowseSelectionCallback when XmNselectionPolicy is set to XmBROWSE_SELECT, XmNmultipleSelectionCallback when XmNselectionPolicy is set to XmMULTIPLE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

    If XmNautomaticSelection is set to True, then the auto_selection_type field of the callback will be valid. If XmNselectionPolicy is set to XmBROWSE_SELECT and the currently selected item position matches the position of the item that was selected before the brose selection began, or if XmNselectionPolicy is set to XmEXTENDED_SELECT and the set of currently selected item positions matches the set of item positions selected before the extended selection began, the callback will be called with auto_selection_type set to XmAUTO_NO_CHANGE. Otherwise, it will be set to XmAUTO_CHANGE.

ListEndToggle():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, moves the location cursor to the last item selected or deselected and calls the XmNextendedSelectionCallback callbacks.

    If XmNautomaticSelection is set to True, then the auto_selection_type field of the callback will be valid. If XmNselectionPolicy is set to XmBROWSE_SELECT and the currently selected item position matches the position of the item that was selected before the browse selection began, or if XmNselectionPolicy is set to XmEXTENDED_SELECT and the set of currently selected item positions matches the set of item positions selected before the extended selection began, the callback will be called with auto_selection_type set to XmAUTO_NO_CHANGE. Otherwise, it will be set to XmAUTO_CHANGE.

ListExtendNextItem():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done; moves the location cursor to the next item and changes the selection state of the item and all items between it and the current anchor point to the state of the item at the current anchor point; calls the XmNextendedSelectionCallback callbacks.

ListExtendPrevItem():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done; moves the location cursor to the previous item and changes the selection state of the item and all items between it and the current anchor point to the state of the item at the current anchor point; calls the XmNextendedSelectionCallback callbacks.

ListScrollCursorVertically(percentage):
    Scrolls the line containing the insertion cursor vertically to an intermediate position in the visible window based on an input percentage. A value of 0 (zero) indicates the top of the window; a value of 100, the bottom of the window. If this action is called with no argument, the line containing the insertion cursor is scrolled vertically to a new position designated by the y event passed to the routine.

ListKbdActivate():
    Calls the callbacks for XmNdefaultActionCallback. If the List's parent is a manager, this action passes the event to the parent.

ListKbdBeginExtend():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, does the following: If an extended selection has been made from the current anchor point, restores the selection state of the items in that range to their state before the extended selection was done; changes the selection state of the item at the location cursor and all items between it and the current anchor point to the state of the item at the current anchor point. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN".

ListKbdBeginSelect():
    If the XmNselectionPolicy is set to XmSINGLE_SELECT, deselects any current selection and toggles the state of the item at the location cursor. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN".

    If the XmNselectionPolicy is set to XmBROWSE_SELECT, deselects any current selection and selects the item at the location cursor. If XmNautomaticSelection is set to True, calls the XmNbrowseSelectionCallback callbacks.

    If the XmNselectionPolicy is set to XmMULTIPLE_SELECT, toggles the selection state of the item at the location cursor. Any previous selections remain.

    If the XmNselectionPolicy is set to XmEXTENDED_SELECT, moves the current anchor to the item at the location cursor. In Normal Mode, this action deselects any current selection and selects the item at the location cursor. In Add Mode, this action toggles the selection state of the item at the location cursor and leaves the current selection unchanged. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks. The auto_selection_type component of the callback structure will be set to XmAUTO_BEGIN".

ListKbdCancel():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT and an extended selection is being made from the current anchor point, this action cancels the new selection and restores the selection state of the items in that range to their state before the extended selection was done. If XmNautomaticSelection is set to True, this action calls the XmNextendedSelectionCallback callbacks; otherwise, if the parent is a manager, it passes the event to the parent. The auto_selection_type component of the callback structure will be set to XmAUTO_CANCEL".

ListKbdDeSelectAll():
    If the XmNselectionPolicy is set to XmSINGLE_SELECT, XmMULTIPLE_SELECT, or XmEXTENDED_SELECT in Add Mode, this action deselects all items in the list. If the XmNselectionPolicy is set to XmEXTENDED_SELECT in Normal Mode, this action deselects all items in the list (except the item at the location cursor if the shell's XmNkeyboardFocusPolicy is XmEXPLICIT). This action also calls the appropriate selection callbacks (XmNsingleSelectionCallback when XmNselectionPolicy is set to XmSINGLE_SELECT, XmNmultipleSelectionCallback when XmNselectionPolicy is set to XmMULTIPLE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

ListKbdEndExtend():
    If XmNselectionPolicy is set to XmEXTENDED_SELECT, this action calls the XmNextendedSelectionCallback callbacks.

    If XmNautomaticSelection is set to True, then the auto_selection_type field of the callback will be valid. If XmNselectionPolicy is set to XmBROWSE_SELECT and the currently selected item position matches the position of the item that was selected before the browse selection began, or if XmNselectionPolicy is set to XmEXTENDED_SELECT and the set of currently selected item positions matches the set of item positions selected before the extended selection began, the callback will be called with auto_selection_type set to XmAUTO_NO_CHANGE. Otherwise, it will be set to XmAUTO_CHANGE.

ListKbdEndSelect():
    Calls the appropriate selection callbacks (XmNsingleSelectionCallback when XmNselectionPolicy is set to XmSINGLE_SELECT, XmNbrowseSelectionCallback when XmNselectionPolicy is set to XmBROWSE_SELECT, XmNmultipleSelectionCallback when XmNselectionPolicy is set to XmMULTIPLE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

    If XmNautomaticSelection is set to True, then the auto_selection_type field of the callback will be valid. If XmNselectionPolicy is set to XmBROWSE_SELECT and the currently selected item position matches the position of the item that was selected before the browse selection began, or if XmNselectionPolicy is set to XmEXTENDED_SELECT and the set of currently selected item positions matches the set of item positions selected before the extended selection began, the callback will be called with auto_selection_type set to XmAUTO_NO_CHANGE. Otherwise, it will be set to XmAUTO_CHANGE.

ListKbdSelectAll():
    If XmNselectionPolicy is set to XmSINGLE_SELECT or XmBROWSE_SELECT, this action selects the item at the location cursor. If XmNselectionPolicy is set to XmEXTENDED_SELECT or XmMULTIPLE_SELECT, it selects all items in the list. This action also calls the appropriate selection callbacks (XmNsingleSelectionCallback when XmNselectionPolicy is set to XmSINGLE_SELECT, XmNbrowseSelectionCallback when XmNselectionPolicy is set to XmBROWSE_SELECT, XmNmultipleSelectionCallback when XmNselectionPolicy is set to XmMULTIPLE_SELECT, XmNextendedSelectionCallback when XmNselectionPolicy is set to XmEXTENDED_SELECT).

ListLeftChar():
    Scrolls the list one character to the left.

ListLeftPage():
    Scrolls the list one page to the left.

ListNextItem():
    Moves the location cursor to the next item in the list.

    If the XmNselectionPolicy is set to XmBROWSE_SELECT, this action also selects the next item, deselects any current selection, and calls the XmNbrowseSelectionCallback callbacks.

    If the XmNselectionPolicy is set to XmEXTENDED_SELECT, this action in Normal Mode also selects the next item, deselects any current selection, moves the current anchor to the next item, and calls the XmNextendedSelectionCallback callbacks. In Add Mode, this action does not affect the selection or the anchor.

ListNextPage():
    Scrolls the list to the next page, moving the location cursor to a new item.

    If the XmNselectionPolicy is set to XmBROWSE_SELECT, this action also selects the new item, deselects any current selection, and calls the XmNbrowseSelectionCallback callbacks.

    If the XmNselectionPolicy is set to XmEXTENDED_SELECT, this action in Normal Mode also selects the new item, deselects any current selection, moves the current anchor to the new item, and calls the XmNextendedSelectionCallback callbacks. In Add Mode, this action does not affect the selection or the anchor.

ListPrevItem():
    Moves the location cursor to the previous item in the list.

    If the XmNselectionPolicy is set to XmBROWSE_SELECT, this action also selects the previous item, deselects any current selection, and calls the XmNbrowseSelectionCallback callbacks.

    If the XmNselectionPolicy is set to XmEXTENDED_SELECT, this action in Normal Mode also selects the previous item, deselects any current selection, moves the current anchor to the previous item, and calls the XmNextendedSelectionCallback callbacks. In Add Mode, this action does not affect the selection or the anchor.

ListPrevPage():
    Scrolls the list to the previous page, moving the location cursor to a new item.

    If the XmNselectionPolicy is set to XmBROWSE_SELECT, this action also selects the new item, deselects any current selection, and calls the XmNbrowseSelectionCallback callbacks.

    If the XmNselectionPolicy is set to XmEXTENDED_SELECT, this action in Normal Mode also selects the new item, deselects any current selection, moves the current anchor to the new item, and calls the XmNextendedSelectionCallback callbacks. In Add Mode this action does not affect the selection or the anchor.

ListProcessBtn1(string)
    When Display's XmNenableBtn1Transfer resource is not XmOFF, the actions for selection and transfer are integrated on <Btn1>. When the button is not performing a transfer or drag, the action that is performed depends on the value of string, which can be one of the following actions:

    •   ListButtonMotion

    •   ListBeginExtend

    •   ListEndExtend

    •   ListBeginToggle

    •   ListEndToggle

    •   ListBeginSelect

    •   ListEndSelect

ListProcessBtn2
    When Display's XmNenableBtn1Transfer resource has a value of XmBUTTON2_TRANSFER, the actions for extending selection are bound on <Btn2>, and a drag starts immediately. When Display's XmNenableBtn1Transfer resource has a value of XmBUTTON2_ADJUST, the action that is performed depends on the value of string, which can be one of the following actions:

    •   ListBeginExtend

    •   ListButtonMotion

    •   ListEndExtend

ListProcessDrag():
    Drags the content of one or more selected list items. Each item is separated by a newline. If BTransfer is pressed on an unselected item, it drags only that item, excluding any other selected items. This action sets the XmNconvertProc of the DragContext to a function that calls the XmNconvertCallback procedures, possibly multiple times, for the _MOTIF_DROP selection.

ListQuickNavigate
    Navigates to an item. When List's XmNmatchBehavior resource is XmQUICK_NAVIGATE, this action uses 1-character navigation to navigate. Refer to the XmNmatchBehavior resource for a description of how this navigation works.

ListRightChar():
    Scrolls the list one character to the right.

ListRightPage():
    Scrolls the list one page to the right.

PrimitiveHelp():
    Calls the callbacks for XmNhelpCallback if any exist. If there are no help callbacks for this widget, this action calls the help callbacks for the nearest ancestor that has them.

PrimitiveNextTabGroup():
    Moves the focus to the first item contained within the next tab group. If the current tab group is the last entry in the tab group list, it wraps to the beginning of the tab group list.

PrimitivePrevTabGroup():
    Moves the focus to the first item contained within the previous tab group. If the beginning of the tab group list is reached, it wraps to the end of the tab group list.

  Additional Behavior

The List widget has the following additional behavior:

<Double Click>
    If a button click is followed by another button click within the time span specified by the display's multiclick time, the List interprets that as a double click and calls the callbacks for XmNdefaultActionCallback. The item's colors invert to indicate that it is selected. The XmNdoubleClickInterval resource can be used to specify a time span that overrides the display's multi-click time.

<FocusIn>:
    If the focus policy is Explicit, this action sets the focus and draw the location cursor.

<FocusOut>:
    If the focus policy is Explicit, this action removes the focus and erase the location cursor.

  Virtual Bindings

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

RELATED

Core(3), XmCreateList(3), XmCreateScrolledList(3), XmFontListCreate(3), XmFontListAppendEntry(3), XmListAddItem(3), XmListAddItems(3), XmListAddItemUnselected(3), XmListAddItemsUnselected(3), XmListDeleteAllItems(3), XmListDeleteItem(3), XmListDeleteItems(3), XmListDeleteItemsPos(3), XmListDeletePos(3), XmListDeletePositions(3), XmListDeselectAllItems(3), XmListDeselectItem(3), XmListDeselectPos(3), XmListGetKbdItemPos XmListGetMatchPos(3), XmListGetSelectedPos(3), XmListItemExists(3), XmListItemPos(3), XmListPosToBounds(3), XmListReplaceItems(3), XmListReplaceItemsPos(3), XmListReplaceItemsPos(3), XmListReplaceItemsPosUnselected(3), XmListReplaceItemsUnselected(3), XmListSelectItem(3), XmListSelectPos(3), XmListSetAddMode(3), XmListSetBottomItem(3), XmListSetBottomPos(3), XmListSetHorizPos(3), XmListSetItem(3), XmListSetKbdItemPos(3), XmListSetPos(3), XmListUpdateSelectedList(3), XmListYToPos(3), XmPrimitive(3) XmStringCreate(3), XmVaCreateList(3), and XmVaCreateManagedList(3).