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NAME
DtMenuButton - the MenuButton widget class
SYNOPSIS
#include <Dt/MenuButton.h>
DESCRIPTION
The DtMenuButton widget is a command widget that complements
the menu cascading functionality of an XmCascadeButton
widget. As a complement to the XmCascadeButton widget,
DtMenuButton can only be instantiated outside a MenuPane;
the application must use XmCascadeButton widget inside a
MenuPane.
The DtMenuButton widget belongs to a subclass of the XmLabel
class. Visually, the DtMenuButton widget consists of a
label string and a menu glyph. The menu glyph always
appears on the right end of the widget and, by default, is a
downward pointing arrow.
The DtMenuButton widget has an implicitly created submenu
attached to it. The submenu is a popup MenuPane and has
this DtMenuButton widget as its parent. The name of the
implicitly created submenu is obtained by adding submenu_ as
a prefix to the name of this DtMenuButton widget. The
widget ID of the submenu can be obtained by doing an XtGet-
Values() on the DtNsubMenuId resource of this DtMenuButton
widget. The implicitly created submenu must not be des-
troyed by the user of this widget.
The submenu can be popped up by pressing the menu post But-
ton (see the XmNmenuPost resource of the XmRowColumn (3X)
widget) anywhere on the DtMenuButton widget.
Widget subclassing is not supported for the DtMenuButton
widget class.
Classes
The DtMenuButton widget inherits behavior and resources from
the Core, Composite, XmPrimitive and XmLabel classes.
The class pointer is dtMenuButtonWidgetClass.
The class name is DtMenuButtonWidget.
New Resources
The following table defines a set of widget resources used
by the application to specify data. The application 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, the application must
remove the DtN or DtC prefix and use the remaining letters.
To specify one of the defined values for a resource in a
.Xdefaults file, the application must remove the Dt prefix
and use the remaining letters (in either lower case or upper
case, but including 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 appli-
cable (N/A).
DtMenuButton Resource Set
_______________________________________________________________________
Name Class Type Default Access
_______________________________________________________________________
DtNcascadingCallback DtCCallback XtCallbackList NULL C
DtNcascadePixmap DtCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
DtNsubMenuId DtCMenuWidget Widget NULL SG
DtNcascadingCallback
Specifies the list of callbacks that is called
before the popping up of the attached submenu. The
reason for the callback is DtCR_CASCADING.
DtNcascadePixmap
Specifies the pixmap displayed as the menu glyph.
If no pixmap is specified, a downward pointing
arrow is displayed.
DtNsubMenuId
Specifies the widget ID of the popup MenuPane to be
associated with this DtMenuButton widget. The
popup MenuPane must be created with this DtMenuBut-
ton as its parent. This resource cannot be speci-
fied at the time of widget creation. The implicit
submenu is automatically destroyed by DtMenuButton
when this resource is set.
Inherited Resources
The DtMenuButton widget inherits behavior and resources from
the following named superclasses. For a complete descrip-
tion of each resource, see the man page for that superclass.
XmLabel 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
XmNlabelInsensitive- XmCLabelInsensitive- Pixmap XmUNSPECIFIED- CSG
Pixmap Pixmap _PIXMAP
XmNlabelPixmap XmCLabelPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
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 XmFONTLIST- CSG
_DEFAULT_TAG
XmNrecomputeSize XmCRecomputeSize Boolean True CSG
XmNstringDirection XmCStringDirection XmStringDirection dynamic CSG
XmPrimitive Resource Set
__________________________________________________________________________________
Name Class Type Default Access
__________________________________________________________________________________
XmNbottom- XmCBottom- Pixel dynamic CSG
ShadowColor ShadowColor
XmNbottom- XmCBottom- Pixmap XmUNSPECIFIED- CSG
ShadowPixmap ShadowPixmap _PIXMAP
XmNforeground XmCForeground Pixel dynamic CSG
XmNhelpCallback XmCCallback XtCallbackList NULL C
XmNhighlightColor XmCHighlightColor Pixel dynamic CSG
XmNhighlightOnEnter XmCHighlightOnEnter Boolean False CSG
XmNhighlightPixmap XmCHighlightPixmap Pixmap dynamic CSG
XmNhighlightThickness XmCHighlightThickness Dimension 0 CSG
XmNnavigationType XmCNavigationType XmNavigationType XmNONE CSG
XmNshadowThickness XmCShadowThickness Dimension 0 CSG
XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG
XmNtopShadowPixmap XmCTopShadowPixmap Pixmap dynamic CSG
XmNtraversalOn XmCTraversalOn Boolean False CSG
XmNunitType XmCUnitType unsigned char dynamic CSG
XmNuserData XmCUserData XtPointer NULL CSG
Core Resource Set
___________________________________________________________________________________
Name Class Type Default Access
___________________________________________________________________________________
XmNaccelerators XmCAccelerators XtAccelerators dynamic CSG
XmNancestorSensitive XmCSensitive Boolean dynamic G
XmNbackground XmCBackground Pixel dynamic CSG
XmNbackgroundPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
XmNborderColor XmCBorderColor Pixel XtDefaultForeground CSG
XmNborderPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
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
XmNinitialResources- XmCInitialResources- Boolean True C
Persistent Persistent
XmNmappedWhen- XmCMappedWhen- Boolean True CSG
Managed Managed
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
DtMenuButton callback:
typedef struct {
int reason;
XEvent *event;
} XmAnyCallbackStruct;
The reason argument indicates why the callback was invoked;
it is always DtCR_CASCADING when the DtNcascadingCallback is
issued.
The event argument points to the XEvent that triggered the
callback or NULL if the callback was not triggered by an
XEvent.
SEE ALSO
DtCreateMenuButton(3X), Core(3X), XmLabel(3X),
XmPrimitive(3X), XmRowColumn(3X), XtGetValues(3X),
XtSetValues(3X).
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