XmPrimitive — The Primitive widget class

NAME

       XmPrimitive — The Primitive widget class

SYNOPSIS

       #include <Xm/Xm.h>

DESCRIPTION

Primitive is a widget class used as a supporting superclass for other
widget classes. It handles border drawing and highlighting, traversal
activation and deactivation, and various callback lists needed by
Primitive widgets. Primitive and all its subclasses hold the
XmQTcareParentVisual trait.

Data Transfer Behavior
Primitive has no widget class conversion or destination procedure.
Subclasses and the XmNconvertCallback procedures are responsible for
any conversion of selections. Subclasses and the subclass
XmNdestinationCallback procedures are responsible for any data
transfers to the widget.

Classes
Primitive inherits behavior, resources, and traits from Core.

The class pointer is xmPrimitiveWidgetClass.

The class name is XmPrimitive.

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).

XmNbottomShadowPixmap
Specifies the pixmap to use to draw the bottom and right
sides of the border shadow.

XmNconvertCallback
Specifies a list of callbacks called when the widget is asked
to convert a selection. The type of the structure whose
address is passed to these callbacks is
XmConvertCallbackStruct. The reason is XmCR_OK.

XmNforeground
Specifies the foreground drawing color used by Primitive
widgets.

XmNhelpCallback
Specifies the list of callbacks that is called when the help
key is pressed. The reason sent by the callback is XmCR_HELP.

XmNhighlightColor
Specifies the color of the highlighting rectangle. This
color is used if the highlight pixmap resource is
XmUNSPECIFIED_PIXMAP.

XmNhighlightOnEnter
Specifies 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 cursor moves into
the widget. 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.

XmNhighlightPixmap
Specifies the pixmap used to draw the highlighting rectangle.

XmNhighlightThickness
Specifies the thickness of the highlighting rectangle.

XmNlayoutDirection
Specifies the direction in which components of the primitive
(including strings) are laid out. The values are of type
XmDirection. If the widget’s parent is a primitive or shell,
the value is inherited from the widget’s parent. Otherwise,
it is inherited from the closest ancestor vendor or menu
shell. Refer to the XmDirection(3) reference page for the
possible direction values.

XmNnavigationType
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
the XmNnavigationType of another widget in the
hierarchy is XmEXCLUSIVE_TAB_GROUP.

XmSTICKY_TAB_GROUP
Indicates that the widget is a tab group, even if
the XmNnavigationType of another widget in the
hierarchy is XmEXCLUSIVE_TAB_GROUP.

XmEXCLUSIVE_TAB_GROUP
Indicates that the widget is a tab group and that
widgets in the hierarchy whose XmNnavigationType 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 the XmNnavigationType of any widget in a
hierarchy is XmEXCLUSIVE_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.

XmNpopupHandlerCallback
Allows the application to control which popup menu will be
automatically posted. The reason can either be XmCR_POST or
XmCR_REPOST:

XmCR_POST Indicates that this is a regular posting request.

XmCR_REPOST
Indicates that the menu was just unposted and that
this callback was invoked on a replay.

This callback uses the XmPopupHandlerCallbackStruct structure
to pass information.

XmNshadowThickness
Specifies the size of the drawn border shadow.

XmNtoolTipString
The XmString to display as the toolTip. If this resource is
NULL, no tip will be displayed. ToolTips are described in
VendorShell(3)

XmNtopShadowColor
Specifies the color to use to draw the top and left sides of
the border shadow. This color is used if the
XmNtopShadowPixmap resource is unspecified. If a default top
shadow pixmap exists, it will need to be removed for the
XmNtopShadowColor to take effect.

XmNtopShadowPixmap
Specifies the pixmap to use to draw the top and left sides of
the border shadow. A Primitive top shadow pixmap is created
in two situations. In either of these situations, a default
50-foreground top shadow pixmap is created.

· If the Primitive top shadow color is the same as the
Core background pixel color.

· If the depth of the screen is only one.

For example, if a widget with the same top shadow and
background color is created, a default shadow pixmap is
generated. Such a pixmap needs to be removed for the
XmNtopShadowColor resource to take effect.

XmNtraversalOn
Specifies if traversal is activated for this widget. In
CascadeButton and CascadeButtonGadget, this resource is
forced to True unless the parent is an OptionMenu.

XmNunitType
Provides the basic support for resolution independence. It
defines the type of units a widget uses with sizing and
positioning resources. If the widget’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
widget. If the widget’s parent is not a subclass of
XmManager, the resource has a default unit type of XmPIXELS.

The unit type can also be specified in resource files, with
the following format:

where:

unit is <" ", pixels, inches, centimeters, millimeters,
points, font units>

pixels is <pix, pixel, pixels>

inches is <in, inch, inches>

centimeter
is <cm, centimeter, centimeters>

millimeters
is <mm, millimeter, millimeters>

points is <pt, point, points>

font units
is <fu, font_unit, font_units>

float is {"+"|"-"}{{<"0"-"9">*}.}<"0"-"9">*

Note that the type Dimension must always be
positive.

For example,

xmfonts*XmMainWindow.height: 10.4cm
*PostIn.width: 3inches

XmNunitType can have the following values:

XmPIXELS All values provided to the widget are treated as
normal pixel values.

XmMILLIMETERS
All values provided to the widget are treated as
normal millimeter values.

Xm100TH_MILLIMETERS
All values provided to the widget are treated as
1/100 of a millimeter.

XmCENTIMETERS
All values provided to the widget are treated as
normal centimeter values.

XmINCHES All values provided to the widget are treated as
normal inch values.

Xm1000TH_INCHES
All values provided to the widget are treated as
1/1000 of an inch.

XmPOINTS All values provided to the widget are treated as
normal point values. A point is a unit used in text
processing applications and is defined as 1/72 of
an inch.

Xm100TH_POINTS
All values provided to the widget are treated as
1/100 of a point. A point is a unit used in text
processing applications and is defined as 1/72 of
an inch.

XmFONT_UNITS
All values provided to the widget are treated as
normal font units. A font unit has horizontal and
vertical components. These are the values of the
XmScreen resources XmNhorizontalFontUnit and
XmNverticalFontUnit.

Xm100TH_FONT_UNITS
All values provided to the widget are treated as
1/100 of a font unit. A font unit has horizontal
and vertical components. These are the values of
the XmScreen resources XmNhorizontalFontUnit and
XmNverticalFontUnit.

XmNuserData
Allows the application to attach any necessary specific data
to the widget. It is an internally unused resource.

Dynamic Color Defaults
The foreground, background, top shadow, bottom shadow, and highlight
color resources are dynamically defaulted. If no color data is
specified, the colors are automatically generated. On a single-plane
system, a black and white color scheme is generated. Otherwise, four
colors are generated, which display the correct shading for the 3-D
visuals. If the background is the only color specified for a widget,
the top shadow and bottom shadow colors are generated to give the 3-D
appearance. Foreground and highlight colors are generated to provide
sufficient contrast with the background color.

Colors are generated only at creation. Resetting the background through
XtSetValues does not regenerate the other colors. XmChangeColor can be
used to recalculate all associated colors based on a new background
color.

Inherited Resources
Primitive inherits behavior and resources from the superclass described
in the following table. For a complete description of each resource,
refer to the reference page for that superclass.

typedef struct
{
int reason;
XEvent * event;
} XmAnyCallbackStruct;

reason Indicates why the callback was invoked. For this callback,
reason is set to XmCR_HELP.

event Points to the XEvent that triggered the callback.

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

typedef struct
{
int reason;
XEvent *event;
Atom selection;
Atom target;
XtPointer source_data;
XtPointer location_data;
int flags;
XtPointer parm;
int parm_format;
unsigned long parm_length;
Atom parm_type;
int status;
XtPointer value;
Atom type;
int format;
unsigned long length;
} XmConvertCallbackStruct;

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 conversion is being
requested. Possible values are CLIPBOARD, PRIMARY,
SECONDARY, and _MOTIF_DROP.

target Indicates the conversion target.

source_data
Contains information about the selection source. When the
selection is _MOTIF_DROP, source_data is the DragContext.
Otherwise, it is NULL.

location_data
Contains information about the location of data to be
converted. If the value is NULL, the data to be transferred
consists of the widget’s current selection. Otherwise, the
type and interpretation of the value are specific to the
widget class.

flags Indicates the status of the conversion. Following are the
possible values:

XmCONVERTING_NONE
This flag is currently unused.

XmCONVERTING_PARTIAL
The target widget was able to be converted, but
some data was lost.

XmCONVERTING_SAME
The conversion target is the source of the data to
be transferred.

XmCONVERTING_TRANSACT
This flag is currently unused.

parm Contains parameter data for this target. If no parameter
data exists, the value is NULL.

When selection is CLIPBOARD and target is
_MOTIF_CLIPBOARD_TARGETS or
_MOTIF_DEFERRED_CLIPBOARD_TARGETS, the value is the requested
operation (XmCOPY, XmMOVE, or XmLINK).

parm_format
Specifies whether the data in parm should be viewed as a list
of char, short, or long quantities. Possible values are 0
(when parm is NULL), 8 (when the data in parm should be
viewed as a list of chars), 16 (when the data in parm should
be viewed as a list of shorts), or 32 (when the data in parm
should be viewed as a list of longs). Note that parm_format
symbolizes a data type, not the number of bits in each list
element. For example, on some machines, a parm_format of 32
means that the data in parm should be viewed as a list of
64-bit quantities, not 32-bit quantities.

parm_length
Specifies the number of elements of data in parm, where each
element has the size specified by parm_format. When parm is
NULL, the value is 0.

parm_type Specifies the parameter type of parm.

status An IN/OUT member that specifies the status of the conversion.
The initial value is XmCONVERT_DEFAULT. The callback
procedure can set this member to one of the following values:

XmCONVERT_DEFAULT
This value means that the widget class conversion
procedure, if any, is called after the callback
procedures return. If the widget class conversion
procedure produces any data, it overwrites the data
provided by the callback procedures in the value
member.

XmCONVERT_MERGE
This value means that the widget class conversion
procedure, if any, is called after the callback
procedures return. If the widget class conversion
procedure produces any data, it appends its data to
the data provided by the callback procedures in the
value member. This value is intended for use with
targets that result in lists of data, such as
TARGETS.

XmCONVERT_DONE
This value means that the callback procedure has
successfully finished the conversion. The widget
class conversion procedure, if any, is not called
after the callback procedures return.

XmCONVERT_REFUSE
This value means that the callback procedure has
terminated the conversion process without
completing the requested conversion. The widget
class conversion procedure, if any, is not called
after the callback procedures return.

value An IN/OUT parameter that contains any data that the callback
procedure produces as a result of the conversion. The
initial value is NULL. If the callback procedure sets this
member, it must ensure that the type, format, and length
members correspond to the data in value. The callback
procedure is responsible for allocating memory when it sets
this member. The toolkit frees this memory when it is no
longer needed.

type An IN/OUT parameter that indicates the type of the data in
the value member. The initial value is INTEGER.

format An IN/OUT parameter that specifies whether the data in value
should be viewed as a list of char, short, or long
quantities. The initial value is 8. The callback procedure
can set this member to 8 (for a list of char), 16 (for a list
of short), or 32 (for a list of long).

length An IN/OUT member that specifies the number of elements of
data in value, where each element has the size symbolized by
format. The initial value is 0.

A pointer to the following structure is passed to each callback for
XmNpopupHandlerCallback:

typedef struct
{
int reason;
XEvent * event;
Widget menuToPost;
Boolean postIt;
Widget target;
} XmPopupHandlerCallbackStruct;

reason Indicates why the callback was invoked.

event Points to the XEvent that triggered the handler.

menuToPost
Specifies the popup menu that the menu system believes should
be posted. The application may modify this field.

postIt Indicates whether the posting process should continue. The
application may modify this field.

target Specifies the most specific widget or gadget that the menu
sytem found from the event that matches the event.

Translations
The XmPrimitive translations are listed below.

Note that for buttons in menus, altering translations in #override or
#augment mode is undefined.

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.

:<Key><osfActivate>:
PrimitiveParentActivate()

:<Key><osfCancel>:
PrimitiveParentCancel()

:<Key><osfBeginLine>:
PrimitiveTraverseHome()

:<Key><osfUp>:
PrimitiveTraverseUp()

:<Key><osfDown>:
PrimitiveTraverseDown()

:<Key><osfLeft>:
PrimitiveTraverseLeft()

:<Key><osfRight>:
PrimitiveTraverseRight()

∼s ∼m ∼a <Key>Return:
PrimitiveParentActivate()

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

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

<Key><osfHelp>:
PrimitiveHelp()

Action Routines
The XmPrimitive action routines are

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():
This action depends on the value of the Display resource
XmNenableButtonTab. When XmNenableButtonTab is False
(default), this action traverses to the first item in 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.

When XmNenableButtonTab is True, this action moves to the
next item within the current tab group, unless it is the last
item in the tab group. When the item is the last in the
group, the action traverses to the first item in the next tab
group. The XmNenableButtonTab behavior applies only to
PushButton, ArrowButton, and DrawnArrow.

PrimitiveParentActivate():
If the parent is a manager, passes the KActivate event
received by the widget to the parent.

PrimitiveParentCancel():
If the parent is a manager, passes the KCancel event received
by the widget to the parent.

PrimitivePrevTabGroup():
This action depends on the value of the Display resource
XmNenableButtonTab. When XmNenableButtonTab is False
(default), this action traverses to the first item in the
previous tab group. If the beginning of the tab group list is
reached, it wraps to the end of the tab group list.

When XmNenableButtonTab is True, this action moves to the
previous item within the current tab group unless it is the
first item in the tab group. When the item is the first in
the group, the action traverses to the first item in the
previous tab group. The XmNenableButtonTab behavior applies
only PushButton, ArrowButton, and DrawnButton.

PrimitiveTraverseDown():
Traverses to the next item below the current widget in the
current tab group, wrapping if necessary. The wrapping
direction depends on the layout direction of the widget tab
group.

PrimitiveTraverseHome():
Traverses to the first widget or gadget in the current tab
group.

PrimitiveTraverseLeft():
Traverses to the next item to the left of the current widget
in the current tab group, wrapping if necessary. The
wrapping direction depends on the layout direction of the
widget tab group.

PrimitiveTraverseNext():
Traverses to the next item in the current tab group, wrapping
if necessary. The wrapping direction depends on the layout
direction of the widget tab group.

PrimitiveTraversePrev():
Traverses to the previous item in the current tab group,
wrapping if necessary. The wrapping direction depends on the
layout direction of the widget tab group.

PrimitiveTraverseRight():
Traverses to the next item to the right of the current gadget
in the current tab group, wrapping if necessary. The
wrapping direction depends on the layout direction of the
widget tab group.

PrimitiveTraverseUp():
Traverses to the next item above the current gadget in the
current tab group, wrapping if necessary. The wrapping
direction depends on the layout direction of the widget tab
group.

Additional Behavior
This widget has the following additional behavior:

<FocusIn>:
If the shell’s keyboard focus policy is XmEXPLICIT,
highlights the widget and gives it the focus

<FocusOut>:
If the shell’s keyboard focus policy is XmEXPLICIT,
unhighlights the widget and removes the focus

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

       Core(3), XmDirection(3), XmChangeColor(3), and XmScreen(3).

                                                     XmPrimitive(library call)

NAME

SYNOPSIS

DESCRIPTION

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