XmGadget(3X)XmGadget(3X)NAMEXmGadget — The Gadget widget class
SYNOPSIS
#include <Xm/Xm.h>
VERSION
This page documents version 1.2 of the Motif library.
DESCRIPTION
Gadget is a widget class used as a supporting superclass for other gad‐
get classes. It handles shadow-border drawing and highlighting, tra‐
versal activation and deactivation, and various callback lists needed
by gadgets.
The color and pixmap resources defined by XmManager are directly used
by gadgets. If XtSetValues is used to change one of the resources for
a manager widget, all of the gadget children within the manager also
change.
Classes
Gadget inherits behavior and resources from Object and RectObj classes.
The class pointer is xmGadgetClass.
The class name is XmGadget.
New Resources
The following table defines a set of widget resources used by the pro‐
grammer to specify data. The programmer can also set the resource val‐
ues 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).
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 2 CSG
XmNnavigationType XmCNavigationType XmNavigationType XmNONE CSG
XmNshadowThickness XmCShadowThickness Dimension 2 CSG
XmNtopShadowColor XmCTopShadowColor Pixel dynamic G
XmNtraversalOn XmCTraversalOn Boolean True CSG
XmNunitType XmCUnitType unsigned char dynamic CSG
XmNuserData XmCUserData XtPointer NULL CSG
Contains the color to use to draw the bottom and right sides of the
border shadow. Specifies the list of callbacks that is called when the
help key sequence is pressed. The reason sent by the callback is
XmCR_HELP. Contains the color of the highlighting rectangle. Speci‐
fies if the highlighting rectangle is drawn when the cursor moves into
the widget. If the shell's focus policy is XmEXPLICIT, this resource
is ignored, and the widget is highlighted when it has the focus. If
the shell's focus policy is XmPOINTER and if this resource is True, the
highlighting rectangle is drawn when the the cursor moves into the wid‐
get. If the shell's focus policy is XmPOINTER and if this resource is
False, the highlighting rectangle is not drawn when the the cursor
moves into the widget. The default is False. Specifies the thickness
of the highlighting rectangle. Determines whether the widget is a tab
group. XmNONE indicates that the widget is not a tab group.
XmTAB_GROUP indicates that the widget is a tab group, unless another
widget in the hierarchy has an XmNnavigationType of XmEXCLU‐
SIVE_TAB_GROUP. XmSTICKY_TAB_GROUP indicates that the widget is a tab
group, even if another widget in the hierarchy has an XmNnavigationType
of XmEXCLUSIVE_TAB_GROUP. XmEXCLUSIVE_TAB_GROUP indicates that the
widget is a tab group and that widgets in the hierarchy whose XmNnavi‐
gationType is XmTAB_GROUP are not tab groups.
When a parent widget has an XmNnavigationType of XmEXCLUSIVE_TAB_GROUP,
traversal of non-tab-group widgets within the group is based on the
order of those widgets in their parent's XmNchildren list.
When any widget in a hierarchy has an XmNnavigationType of XmEXCLU‐
SIVE_TAB_GROUP, traversal of tab groups in the hierarchy proceeds to
widgets in the order in which their XmNnavigationType resources were
specified as XmEXCLUSIVE_TAB_GROUP or XmSTICKY_TAB_GROUP, whether by
creating the widgets with that value, by calling XtSetValues, or by
calling XmAddTabGroup. Specifies the size of the drawn border shadow.
Contains the color to use to draw the top and left sides of the border
shadow. Specifies traversal activation for this gadget. Provides the
basic support for resolution independence. It defines the type of
units a widget uses with sizing and positioning resources. If the wid‐
get's parent is a subclass of XmManager and if the XmNunitType resource
is not explicitly set, it defaults to the unit type of the parent wid‐
get. If the widget's parent is not a subclass of XmManager, the
resource has a default unit type of XmPIXELS.
XmNunitType can have the following values: XmPIXELS—all values provided
to the widget are treated as normal pixel values. Xm100TH_MILLIMETERS—
all values provided to the widget are treated as 1/100 millimeter.
Xm1000TH_INCHES—all values provided to the widget are treated as 1/1000
inch. Xm100TH_POINTS—all values provided to the widget are treated as
1/100 point. A point is a unit used in text processing applications
and is defined as 1/72 inch. Xm100TH_FONT_UNITS—all values provided to
the widget are treated as 1/100 of a font unit. A font unit has hori‐
zontal and vertical components. These are the values of the XmScreen
resources XmNhorizontalFontUnit and XmNverticalFontUnit. Allows the
application to attach any necessary specific data to the gadget. This
is an internally unused resource.
Inherited Resources
Gadget inherits the following resources from the named superclass. For
a complete description of each resource, refer to the man page for that
superclass.
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
Callback Information
A pointer to the following structure is passed to each callback: type‐
def struct { int reason; XEvent * event; } XmAny‐
CallbackStruct; Indicates why the callback was invoked. For this call‐
back, reason is set to XmCR_HELP. Points to the XEvent that triggered
the callback.
Behavior
Gadgets cannot have translations associated with them. Because of
this, a Gadget's behavior is determined by the Manager widget into
which the Gadget is placed. If focus is on a Gadget, events are passed
to the Gadget by its Manager.
RELATED INFORMATIONObject(3X), RectObj(3X), XmManager(3X), and XmScreen(3X).
XmGadget(3X)
