XmLabelGadget(3X)
XmLabelGadget --The LabelGadget widget class
As shipped in IRIX 6.5.7. Unchanged since IRIX 6.5.
NAME XmLabelGadget --The LabelGadget widget class SYNOPSIS #include <Xm/LabelG.h> VERSION This page documents version 1.2 of the Motif library. DESCRIPTION LabelGadget is an instantiable widget and is also used as a superclass for other button gadgets, such as PushButtonGadget and ToggleButtonGadget. LabelGadget can contain either text or a pixmap. LabelGadget text is a compound string. Refer to the OSF/Motif Programmer's Guide for more infor- mation on compound strings. The text can be multilingual, multiline, and/or multifont. When a LabelGadget is insensitive, its text is stippled, or the user-supplied insensitive pixmap is displayed. LabelGadget supports both accelerators and mnemonics primarily for use in LabelGadget subclass widgets that are contained in menus. Mnemonics are available in a menu system when the button is visible. Accelerators in a menu system are accessible even when the button is not visible. The Label- Gadget displays the mnemonic by underlining the first matching character in the text string. The accelerator is displayed as a text string adjacent to the label text or pixmap. LabelGadget consists of many margin fields surrounding the text or pixmap. These margin fields are resources that may be set by the user, but Label- Gadget subclasses and Manager parents also modify some of these fields. They tend to modify the XmNmarginLeft, XmNmarginRight, XmNmarginTop, and XmNmarginBottom resources and leave the XmNmarginWidth and XmNmarginHeight resources as set by the application. LabelGadget takes into account XmNshadowThickness in determining its layout but does not draw the shadow. That is, if XmNshadowThickness is greater than 0, LabelGadget leaves space for the shadow, but the shadow does not appear. In a LabelGadget XmNtraversalOn and XmNhighlightOnEnter are forced to False inside Popup MenuPanes, Pulldown MenuPanes, and OptionMenus. Otherwise these resources default to False. Classes LabelGadget inherits behavior and resources from Object, RectObj and XmGad- get classes. The class pointer is xmLabelGadgetClass. The class name is XmLabelGadget. New Resources The following table defines a set of widget resources used by the program- mer to specify data. The programmer can also set the resource values for the inherited classes to set attributes for this widget. To reference a resource by name or by class in a .Xdefaults file, remove the XmN 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 re- maining letters (in either lowercase or uppercase, but include any under- scores 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). XmLabelGadget Resource Set Name Class Type Default Access ---------------------------------------------------------------------------------------------------------- XmNaccelerator XmCAccelerator String NULL CSG XmNacceleratorText XmCAcceleratorText XmString NULL CSG XmNalignment XmCAlignment unsigned char dynamic CSG XmNfontList XmCFontList XmFontList dynamic CSG XmNlabelInsensitivePixmap XmCLabelInsensitivePixmap Pixmap XmUNSPECIFIED_PIXMAP CSG XmNlabelPixmap XmCLabelPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG XmNlabelString XmCXmString XmString dynamic CSG XmNlabelType XmCLabelType unsigned char XmSTRING CSG XmNmarginBottom XmCMarginBottom Dimension 0 CSG XmNmarginHeight XmCMarginHeight Dimension 2 CSG XmNmarginLeft XmCMarginLeft Dimension 0 CSG XmNmarginRight XmCMarginRight Dimension 0 CSG XmNmarginTop XmCMarginTop Dimension 0 CSG XmNmarginWidth XmCMarginWidth Dimension 2 CSG XmNmnemonic XmCMnemonic KeySym NULL CSG XmNmnemonicCharSet XmCMnemonicCharSet String dynamic CSG XmNrecomputeSize XmCRecomputeSize Boolean True CSG XmNstringDirection XmCStringDirection XmStringDirection dynamic CSG XmNaccelerator Sets the accelerator on a button widget in a menu, which acti- vates a visible or invisible, but managed, button from the key- board. This resource is a string that describes a set of modi- fiers and the key that may be used to select the button. The format of this string is identical to that used by the transla- tions manager, with the exception that only a single event may be specified and only KeyPress events are allowed. Accelerators for buttons are supported only for PushButtonGadgets and ToggleButtonGadgets in Pulldown and Popup menus. XmNacceleratorText Specifies the text displayed for the accelerator. The text is displayed adjacent to the label string or pixmap. Accelerator text for buttons is displayed only for PushButtonGadgets and Tog- gleButtonGadgets in Pulldown and Popup Menus. XmNalignment Specifies the label alignment for text or pixmap. * XmALIGNMENT_BEGINNING (left alignment)-causes the left sides of the lines of text to be vertically aligned with the left edge of the gadget. For a pixmap, its left side is verti- cally aligned with the left edge of the gadget. * XmALIGNMENT_CENTER (center alignment)-causes the centers of the lines of text to be vertically aligned in the center of the gadget. For a pixmap, its center is vertically aligned with the center of the gadget. * XmALIGNMENT_END (right alignment)-causes the right sides of the lines of text to be vertically aligned with the right edge of the gadget. For a pixmap, its right side is verti- cally aligned with the right edge of the gadget. The above descriptions for text are correct when XmNstringDi- rection is XmSTRING_DIRECTION_L_TO_R; the descriptions for XmA- LIGNMENT_BEGINNING and XmALIGNMENT_END are switched when the resource is XmSTRING_DIRECTION_R_TO_L. If the parent is a RowColumn whose XmNisAligned resource is True, XmNalignment is forced to the same value as the RowCol- umn's XmNentryAlignment if the RowColumn's XmNrowColumnType is XmWORK_AREA or if the gadget is a subclass of XmLabelGadget. Otherwise, the default is XmALIGNMENT_CENTER. XmNfontList Specifies the font of the text used in the gadget. If this value is NULL at initialization, the font list is initialized by look- ing up the parent hierarchy of the widget for an ancestor that is a subclass of the XmBulletinBoard, VendorShell, or XmMenuShell widget class. If such an ancestor is found, the font list is initialized to the XmNbuttonFontList (for button gadget sub- classes) or XmNlabelFontList of the ancestor widget. If no such ancestor is found, the default is implementation dependent. Re- fer to XmFontList(3X) for more information on the creation and structure of a font list. XmNlabelInsensitivePixmap Specifies a pixmap used as the button face if XmNlabelType is XmPIXMAP and the button is insensitive. The default value, XmUN- SPECIFIED_PIXMAP, displays an empty label. XmNlabelPixmap Specifies the pixmap when XmNlabelType is XmPIXMAP. The default value, XmUNSPECIFIED_PIXMAP, displays an empty label. XmNlabelString Specifies the compound string when XmNlabelType is XmSTRING. If this value is NULL, it is initialized by converting the name of the gadget to a compound string. Refer to XmString(3X) for more information on the creation and the structure of compound strings. XmNlabelType Specifies the label type. * XmSTRING - text displays XmNlabelString * XmPIXMAP - icon data in pixmap displays XmNlabelPixmap or XmNlabelInsensitivePixmap XmNmarginBottom Specifies the amount of spacing between the bottom of the label text and the top of the bottom margin specified by XmNmargin- Height. This may be modified by LabelGadget's subclasses. For example, CascadeButtonGadget may increase this field to make room for the cascade pixmap. XmNmarginHeight Specifies an equal amount of spacing above the margin defined by XmNmarginTop and below the margin defined by XmNmarginBottom. Xm- NmarginHeight specifies the amount of spacing between the top edge of the margin set by XmNmarginTop and the bottom edge of the top shadow, and the amount of spacing between the bottom edge of the margin specified by XmNmarginBottom and the top edge of the bottom shadow. XmNmarginLeft Specifies the amount of spacing between the left edge of the la- bel text and the right side of the left margin (specified by XmN- marginWidth). This may be modified by LabelGadget's subclasses. For example, ToggleButtonGadget may increase this field to make room for the toggle indicator and for spacing between the indica- tor and label. Whether this actually applies to the left or right side of the label may depend on the value of XmNstringDi- rection. XmNmarginRight Specifies the amount of spacing between the right edge of the la- bel text and the left side of the right margin (specified by XmN- marginWidth). This may be modified by LabelGadget's subclasses. For example, CascadeButtonGadget may increase this field to make room for the cascade pixmap. Whether this actually applies to the left or right side of the label may depend on the value of XmNstringDirection. XmNmarginTop Specifies the amount of spacing between the top of the label text and the bottom of the top margin specified by XmNmarginHeight. This may be modified by LabelGadget's subclasses. For example, CascadeButtonGadget may increase this field to make room for the cascade pixmap. XmNmarginWidth Specifies an equal amount of spacing to the left of the margin defined by XmNmarginLeft and to the right of the margin defined by XmNmarginRight. XmNmarginWidth specifies the amount of spac- ing between the left edge of the margin set by XmNmarginLeft and the right edge of the left shadow, and the amount of spacing be- tween the right edge of the margin specified by XmNmarginRight and the left edge of the right shadow. XmNmnemonic Provides the user with an alternate means of activating a button. A button in a MenuBar, a Popup MenuPane, or a Pulldown MenuPane can have a mnemonic. This resource contains a keysym as listed in the X11 keysym ta- ble. The first character in the label string that exactly matches the mnemonic in the character set specified in XmNmnemon- icCharSet is underlined when the button is displayed. When a mnemonic has been specified, the user activates the button by pressing the mnemonic key while the button is visible. If the button is a CascadeButtonGadget in a MenuBar and the MenuBar does not have the focus, the user must use the MAlt modifier while pressing the mnemonic. The user can activate the button by pressing either the shifted or the unshifted mnemonic key. XmNmnemonicCharSet Specifies the character set of the mnemonic for the label. The default is XmFONTLIST_DEFAULT_TAG. XmNrecomputeSize Specifies a Boolean value that indicates whether the gadget shrinks or expands to accommodate its contents (label string or pixmap) as a result of an XtSetValues resource value that would change the size of the gadget. If True, the gadget shrinks or expands to exactly fit the label string or pixmap. If False, the gadget never attempts to change size on its own. XmNstringDirection Specifies the direction in which the string is to be drawn. The following are the values: * XmSTRING_DIRECTION_L_TO_R - left to right * XmSTRING_DIRECTION_R_TO_L - right to left The default for this resource is determined at creation time. If no value is specified for this resource and the widget's parent is a manager, the value is inherited from the parent; otherwise, it defaults to XmSTRING_DIRECTION_L_TO_R. Inherited Resources LabelGadget inherits behavior and resources from the following super- classes. For a complete description of each resource, refer to the man page for that superclass. XmGadget Resource Set Name Class Type Default Access ------------------------------------------------------------------------------------ XmNbottomShadowColor XmCBottomShadowColor Pixel dynamic G XmNhelpCallback XmCCallback XtCallbackList NULL C XmNhighlightColor XmCHighlightColor Pixel dynamic G XmNhighlightOnEnter XmCHighlightOnEnter Boolean False CSG XmNhighlightThickness XmCHighlightThickness Dimension 0 CSG XmNnavigationType XmCNavigationType XmNavigationType XmNONE CSG XmNshadowThickness XmCShadowThickness Dimension 0 CSG XmNtopShadowColor XmCTopShadowColor Pixel dynamic G XmNtraversalOn XmCTraversalOn Boolean False CSG XmNunitType XmCUnitType unsigned char dynamic CSG XmNuserData XmCUserData XtPointer NULL CSG RectObj Resource Set Name Class Type Default Access --------------------------------------------------------------------- XmNancestorSensitive XmCSensitive Boolean dynamic G XmNborderWidth XmCBorderWidth Dimension 0 CSG XmNheight XmCHeight Dimension dynamic CSG XmNsensitive XmCSensitive Boolean True CSG XmNwidth XmCWidth Dimension dynamic CSG XmNx XmCPosition Position 0 CSG XmNy XmCPosition Position 0 CSG Object Resource Set Name Class Type Default Access --------------------------------------------------------------------- XmNdestroyCallback XmCCallback XtCallbackList NULL C Behavior XmLabelGadget includes behavior from XmGadget. Additional XmLabelGadget behavior is described below: BDrag Press: Drags the contents of a LabelGadget, identified by pressing BDrag. This action creates a DragContext object whose XmNexport- Targets resource is set to "COMPOUND_TEXT" for a label type of XmSTRING; otherwise, "PIXMAP" if the label type is XmPIXMAP. This action is undefined for LabelGadgets used in a menu system. KHelp: In a Popup or Pulldown MenuPane, unposts all menus in the menu hierarchy and, when the shell's keyboard focus policy is XmEX- PLICIT, restores keyboard focus to the widget that had the focus before the menu system was entered. Calls the callbacks for XmN- helpCallback 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. MAny KCancel: In a MenuBar, disarms the CascadeButton and the menu and, when the shell's keyboard focus policy is XmEXPLICIT, restores key- board focus to the widget that had the focus before the menu was entered. In a toplevel Pulldown MenuPane from a MenuBar, unposts the menu, disarms the MenuBar CascadeButton and the MenuBar, and, when the shell's keyboard focus policy is XmEXPLICIT, restores keyboard focus to the widget that had the focus before the MenuBar was entered. In other Pulldown MenuPanes, un- posts the menu. In a Popup MenuPane, unposts the menu and, when the shell's keyboard focus policy is XmEXPLICIT, restores keyboard focus to the widget from which the menu was posted. KDown: If the current menu item has a submenu and is in a MenuBar, then this action posts the submenu, disarms the current menu item, and arms the submenu's first traversable menu item. If the current menu item is in a MenuPane, then this action disarms the current menu item and arms the item below it. This action wraps within the MenuPane. When the current menu item is at the MenuPane's bottom edge, then this action wraps to the topmost menu item in the column to the right, if one exists. When the current menu item is at the bottom, rightmost cor- ner of the MenuPane, then this action wraps to the tear-off control, if present, or to the top, leftmost menu item. KLeft: When the current menu item is in a MenuBar, then this action dis- arms the current item and arms the MenuBar item to the left. This action wraps within the MenuBar. In MenuPanes, if the current menu item is not at the left edge of a Menu- Pane, this action disarms the current item and arms the item to its left. If the current menu item is at the left edge of a submenu attached to a MenuBar item, then this action unposts the submenu and traverses to the MenuBar item to the left, wrapping if necessary. If that MenuBar item has a submenu, it posts the submenu and arms the first traversable item in the submenu. If the current menu item is at the left edge of a submenu not di- rectly attached to a MenuBar item, then this action unposts the current submenu only. In Popup or Torn-off MenuPanes, when the current menu item is at the left edge, this action wraps within the MenuPane. If the current menu item is at the left edge of the MenuPane and not in the top row, this action wraps to the rightmost menu item in the row above. If the current menu item is in the upper, leftmost corner, this action wraps to the tear-off control, if present, or else it wraps to the bottom, rightmost menu item in the MenuPane. KRight: If the current menu item is in a MenuBar, then this action dis- arms the current item and arms the MenuBar item to the right. This action wraps within the MenuBar. In MenuPanes, if the current menu item is a CascadeButton, then this action posts its associated submenu. If the current menu item is not a Cascade- Button and is not at the right edge of a MenuPane, this action disarms the current item and arms the item to its right, wrapping if necessary. If the current menu item is not a CascadeButton and is at the right edge of a sub- menu that is a descendent of a MenuBar, then this action unposts all sub- menus and traverses to the MenuBar item to the right. If that MenuBar item has a submenu, it posts the submenu and arms the submenu's first traversa- ble item. In Popup or Torn-off menus, if the current menu item is not a CascadeButton and is at the right edge of a row (except the bottom row), this action wraps to the leftmost menu item in the row below. If the current menu item is not a CascadeButton and is in the bottom, rightmost corner of a Popup or Pulldown MenuPane, this action wraps to the tear-off control, if present, or else it wraps to the top, leftmost menu item of the MenuPane. KUp: When the current menu item is in a MenuPane, then this action disarms the current menu item and arms the item above it. This action wraps within the MenuPane. When the current menu item is at the MenuPane's top edge, then this action wraps to the bottom- most menu item in the column to the left, if one exists. When the current menu item is at the top, leftmost corner of the Menu- Pane, then this action wraps to the tear-off control, if present, or to the bottom, rightmost menu item. Virtual Bindings The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings(3X). RELATED INFORMATION Object(3X), RectObj(3X), XmCreateLabelGadget(3X), XmFontListCreate(3X), Xm- StringCreate(3X), XmStringCreateLtoR(3X), and XmGadget(3X). XmLabelGadget(3X)