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NAME
XmCommand — The Command widget class "XmCommand" "widget class" "Command"
SYNOPSIS
#include <Xm/Command.h>
DESCRIPTION
Command is a special-purpose composite widget for command entry that provides a built-in
command-history mechanism. Command includes a command-line text-input field, a command-
line prompt, and a command-history list region.
One additional WorkArea child may be added to the Command after creation.
Whenever a command is entered, it is automatically added to the end of the command-history
list and made visible. This does not change the selected item in the list, if there is
one.
Many of the new resources specified for Command are actually SelectionBox resources that
have been renamed for clarity and ease of use.
Descendants
Command automatically creates the descendants shown in the following table. An
application can use XtNameToWidget to gain access to the named descendant. In addition, a
user or an application can use the named descendant when specifying resource values.
┌─────────────────┬──────────────────┬───────────────────────────────┐
│Named Descendant │ Class │ Identity │
├─────────────────┼──────────────────┼───────────────────────────────┤
├─────────────────┼──────────────────┼───────────────────────────────┤
├─────────────────┼──────────────────┼───────────────────────────────┤
│ItemsList │ XmList │ command-history list region │
├─────────────────┼──────────────────┼───────────────────────────────┤
│ItemsListSW │ XmScrolledWindow │ the ScrolledWindow parent of │
│ │ │ ItemsList │
├─────────────────┼──────────────────┼───────────────────────────────┤
│Selection │ XmLabelGadget │ command-line prompt │
├─────────────────┼──────────────────┼───────────────────────────────┤
│Text │ XmTextField │ command-line text-input field │
├─────────────────┼──────────────────┼───────────────────────────────┤
└─────────────────┴──────────────────┴───────────────────────────────┘
Classes
Command inherits behavior, resources, and traits from Core, Composite, Constraint,
XmManager, XmBulletinBoard, and XmSelectionBox.
The class pointer is xmCommandWidgetClass.
The class name is XmCommand.
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).
┌─────────────────────────────────────────────────────────────────────────────────────┐
│ │ XmCommand Resource│Set │ │ │
│Name │ Class │ Type │ Default │ Access │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNcommand │ XmCTextString │ XmString │ "" │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNcommandChangedCallback │ XmCCallback │ XtCallbackList │ NULL │ C │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNcommandEnteredCallback │ XmCCallback │ XtCallbackList │ NULL │ C │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNhistoryItems │ XmCItems │ XmStringTable │ NULL │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNhistoryItemCount │ XmCItemCount │ int │ 0 │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNhistoryMaxItems │ XmCMaxItems │ int │ 100 │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNhistoryVisibleItemCount │ XmCVisibleItemCount │ int │ dynamic │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
│XmNpromptString │ XmCPromptString │ XmString │ dynamic │ CSG │
├───────────────────────────┼─────────────────────┼────────────────┼─────────┼────────┤
└───────────────────────────┴─────────────────────┴────────────────┴─────────┴────────┘
XmNcommand
Contains the current command-line text. This is the XmNtextString resource in
SelectionBox, renamed for Command. This resource can also be modified with
XmCommandSetValue and XmCommandAppendValue functions. The command area is a
Text widget.
XmNcommandChangedCallback
Specifies the list of callbacks that is called after each time the value of the
command changes. The callback reason is XmCR_COMMAND_CHANGED. This is
equivalent to the XmNvalueChangedCallback of the Text widget, except that a
pointer to an XmCommandCallbackStructure is passed, and the structure's value
member contains the XmString.
XmNcommandEnteredCallback
Specifies the list of callbacks that is called when a command is entered in the
Command. The callback reason is XmCR_COMMAND_ENTERED. A pointer to an
XmCommandCallback structure is passed.
XmNhistoryItems
Lists XmString items that make up the contents of the history list. This is the
XmNlistItems resource in SelectionBox, renamed for Command. XtGetValues for
this resource returns the list items themselves, not a copy of the list items.
The application must not free the returned items.
XmNhistoryItemCount
Specifies the number of XmStrings in XmNhistoryItems. This is the
XmNlistItemCount resource in SelectionBox, renamed for Command. The value must
not be negative.
XmNhistoryMaxItems
Specifies the maximum number of items allowed in the history list. Once this
number is reached, an existing list item must be removed before a new item can
be added to the list. For each command entered, the first list item is removed
from the list, so the new command can be added to the list. The value must be
greater than 0 (zero).
XmNhistoryVisibleItemCount
Specifies the number of items in the history list that should be visible at one
time. In effect, it sets the height (in lines) of the history list window. This
is the XmNlistVisibleItemCount resource in SelectionBox, renamed for Command.
The value must be greater than 0 (zero). The default is dynamic based on the
height of the list.
XmNpromptString
Specifies a prompt for the command line. This is the XmNselectionLabelString
resource in SelectionBox, renamed for Command. The default may vary depending
on the value of the XmNlayoutDirection resource and the locale. In the C locale
the default is > (right angle bracket).
Now that some default localized label strings are provided through message
catalogs for the children of composite widgets, the labelString resources cannot
be set on the child through default resource files. Instead, the resource
provided at the parent level must be used.
Inherited Resources
Command inherits behavior and resources from the superclasses described in the following
tables. For a complete description of each resource, refer to the reference page for that
superclass.
┌──────────────────────────────────────────────────────────────────────────────────────────────────────┐
--
RELATED
Composite(3), Constraint(3), Core(3), XmBulletinBoard(3), XmCommandAppendValue(3),
XmCommandError(3), XmCommandGetChild(3), XmCommandSetValue(3), XmCreateCommand(3),
XmManager(3), XmSelectionBox(3), XmVaCreateCommand(3), and XmVaCreateManagedCommand(3).
XmCommand(3)