Core is the Xt Intrinsic base class for windowed widgets. The Object
and RectObj classes provide support for windowless widgets.
Classes
All widgets are built from Core.
The class pointer is widgetClass.
The class name is Core.
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).
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_PIXMAP
CSG
XmNborderColor
XmCBorderColor
Pixel
XtDefaultForeground
CSG
XmNborderPixmap
XmCPixmap
Pixmap
XmUNSPECIFIED_PIXMAP
CSG
XmNborderWidth
XmCBorderWidth
Dimension
1
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
XmNaccelerators
Specifies a translation table that is bound with its actions in the context
of a particular widget. The accelerator table can then be installed on some
destination widget.
XmNancestorSensitive
Specifies whether the immediate parent of the widget receives input
events. Use the function XtSetSensitive to change the argument
to preserve data integrity (see XmNsensitive below).
For shells, the default is copied from the parent's
XmNancestorSensitive resource if there is a parent; otherwise, it
is True.
For other widgets, the default is the bitwise AND of the parent's
XmNsensitive and XmNancestorSensitive resources.
XmNbackground
Specifies the background color for the widget.
XmNbackgroundPixmap
Specifies a pixmap for tiling the background. The first tile is
placed at the upper left-hand corner of the widget's window.
XmNborderColor
Specifies the color of the border in a pixel value.
XmNborderPixmap
Specifies a pixmap to be used for tiling the border. The first tile is
placed at the upper left-hand corner of the border.
XmNborderWidth
Specifies the width of the border that surrounds the widget's window on all
four sides. The width is specified in pixels. A width of zero means that
no border shows.
XmNcolormap
Specifies the colormap that is used for conversions to the type
Pixel for this widget instance. When changed, previously
generated pixel values are not affected, but newly generated
values are in the new colormap.
For shells without parents, the default is the default colormap of the
widget's screen.
Otherwise, the default is copied from the parent.
XmNdepth
Specifies the number of bits that can be used for each pixel in the
widget's window. Applications should not change or set the value of this
resource as it is set by the Xt Intrinsics when the widget is created.
For shells without parents, the default is the default depth of the
widget's screen.
Otherwise, the default is copied from the parent.
XmNdestroyCallback
Specifies a list of callbacks that is called when the widget
is destroyed.
XmNheight
Specifies the inside height (excluding the border) of the widget's
window.
XmNinitialResourcesPersistent
Specifies whether or not resources are reference counted.
If the value is True when the widget is created, the resources
referenced by the widget are not reference counted, regardless of how
the resource type converter is registered.
An application that expects to destroy the widget and wants to have
resources deallocated should specify a value of False.
The default is True, implying an assumption that the widget will not be
destroyed during the life of the application.
XmNmappedWhenManaged
If set to True it maps the widget (makes it visible) as soon as it is both
realized and managed.
If set to False, the client is responsible for
mapping and unmapping the widget. If the value is changed from True to
False after the widget has been realized and managed, the widget is
unmapped.
XmNscreen
Specifies the screen on which a widget instance resides.
It is read only.
When the Toolkit is initialized, the top-level widget obtains its
default value from the default screen of the display.
Otherwise, the default is copied from the parent.
XmNsensitive
Determines whether a widget receives input events. If a widget is
sensitive, the Xt Intrinsics' Event Manager dispatches to the widget all
keyboard, mouse button, motion, window enter/leave, and focus events.
Insensitive widgets do not receive these events. Use the function
XtSetSensitive to change the sensitivity argument. Using
XtSetSensitive ensures that if a parent widget has
XmNsensitive set to False, the ancestor-sensitive flag of all its
children is appropriately set.
XmNtranslations
Points to a translations list. A translations list is a list of events and
actions that are to be performed when the events occur.
XmNwidth
Specifies the inside width (excluding the border) of the widget's
window.
XmNx
Specifies the x-coordinate of the upper left outside corner of the
widget's window.
The value is relative to the upper left inside corner of the parent
window.
XmNy
Specifies the y-coordinate of the upper left outside corner of the
widget's window.
The value is relative to the upper left inside corner of the parent
window.
