XmDrawingArea(3X) XmDrawingArea(3X)
NAME
XmDrawingArea - The DrawingArea widget class
SYNOPSIS
#include <Xm/DrawingA.h>
DESCRIPTION
DrawingArea is an empty widget that is easily adaptable to a variety of purposes. It does no drawing and defines no behavior except for
invoking callbacks. Callbacks notify the application when graphics need to be drawn (exposure events or widget resize) and when the widget
receives input from the keyboard or mouse.
Applications are responsible for defining appearance and behavior as needed in response to DrawingArea callbacks.
DrawingArea is also a composite widget and subclass of XmManager that supports minimal geometry management for multiple widget or gadget
children.
Classes
DrawingArea inherits behavior and resources from the Core, Composite, Constraint, and XmManager classes.
The class pointer is xmDrawingAreaWidgetClass.
The class name is XmDrawingArea.
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).
XmDrawingArea Resource Set
Class: XmCCallback Default: NULL Type: XtCallbackList Access: C Class: XmCCallback Default: NULL Type: XtCallbackList Access: C Class:
XmCMarginHeight Default: 10 Type: Dimension Access: CSG Class: XmCMarginWidth Default: 10 Type: Dimension Access: CSG Class: XmCCallback
Default: NULL Type: XtCallbackList Access: C Class: XmCResizePolicy Default: XmRESIZE_ANY Type: unsigned char Access: CSG
Specifies the list of callbacks that is called when DrawingArea receives an exposure event. The callback reason is XmCR_EXPOSE. The
callback structure also includes the exposure event.
The default bit gravity for Manager windows is NorthWestGravity. This may cause the XmNexposeCallback procedures not to be invoked
when the DrawingArea window is made smaller. Specifies the list of callbacks that is called when the DrawingArea receives a key-
board or mouse event (key or button, up or down). The callback reason is XmCR_INPUT. The callback structure also includes the input
event. Specifies the minimum spacing in pixels between the top or bottom edge of DrawingArea and any child widget. Specifies the
minimum spacing in pixels between the left or right edge of DrawingArea and any child widget. Specifies the list of callbacks that
is called when the DrawingArea is resized. The callback reason is XmCR_RESIZE. Controls the policy for resizing DrawingArea wid-
gets. Possible values include XmRESIZE_NONE (fixed size), XmRESIZE_ANY (shrink or grow as needed), and XmRESIZE_GROW (grow only).
Inherited Resources
DrawingArea inherits behavior and resources from the following superclasses. For a complete description of each resource, refer to the man
page for that superclass.
XmManager Resource Set
Class: XmCBottomShadowColor Default: dynamic Type: Pixel Access: CSG Class: XmCBottomShadowPixmap Default: XmUNSPECIFIED_PIXMAP Type:
Pixmap Access: CSG Class: XmCForeground Default: dynamic Type: Pixel Access: CSG Class: XmCCallback Default: NULL Type: XtCallbackList
Access: C Class: XmCHighlightColor Default: dynamic Type: Pixel Access: CSG Class: XmCHighlightPixmap Default: dynamic Type: Pixmap
Access: CSG Class: XmCInitialFocus Default: NULL Type: Widget Access: CSG Class: XmCNavigationType Default: XmTAB_GROUP Type: XmNaviga-
tionType Access: CSG Class: XmCShadowThickness Default: 0 Type: Dimension Access: CSG Class: XmCStringDirection Default: dynamic Type:
XmStringDirection Access: CG Class: XmCTopShadowColor Default: dynamic Type: Pixel Access: CSG Class: XmCTopShadowPixmap Default: dynamic
Type: Pixmap Access: CSG Class: XmCTraversalOn Default: True Type: Boolean Access: CSG Class: XmCUnitType Default: dynamic Type:
unsigned char Access: CSG Class: XmCUserData Default: NULL Type: XtPointer Access: CSG
Composite Resource Set
Class: XmCReadOnly Default: NULL Type: WidgetList Access: G Class: XmCInsertPosition Default: NULL Type: XtOrderProc Access: CSG Class:
XmCReadOnly Default: 0 Type: Cardinal Access: G
Core Resource Set
Class: XmCAccelerators Default: dynamic Type: XtAccelerators Access: CSG Class: XmCSensitive Default: dynamic Type: Boolean Access: G
Class: XmCBackground Default: dynamic Type: Pixel Access: CSG Class: XmCPixmap Default: XmUNSPECIFIED_PIXMAP Type: Pixmap Access: CSG
Class: XmCBorderColor Default: XtDefaultForeground Type: Pixel Access: CSG Class: XmCPixmap Default: XmUNSPECIFIED_PIXMAP Type: Pixmap
Access: CSG Class: XmCBorderWidth Default: 0 Type: Dimension Access: CSG Class: XmCColormap Default: dynamic Type: Colormap Access: CG
Class: XmCDepth Default: dynamic Type: int Access: CG Class: XmCCallback Default: NULL Type: XtCallbackList Access: C Class: XmCHeight
Default: dynamic Type: Dimension Access: CSG Class: XmCInitialResourcesPersistent Default: True Type: Boolean Access: C Class: XmCMapped-
WhenManaged Default: True Type: Boolean Access: CSG Class: XmCScreen Default: dynamic Type: Screen * Access: CG Class: XmCSensitive
Default: True Type: Boolean Access: CSG Class: XmCTranslations Default: dynamic Type: XtTranslations Access: CSG Class: XmCWidth Default:
dynamic Type: Dimension Access: CSG Class: XmCPosition Default: 0 Type: Position Access: CSG Class: XmCPosition Default: 0 Type: Posi-
tion Access: CSG
Callback Information
A pointer to the following structure is passed to each callback: typedef struct {
int reason;
XEvent * event;
Window window; } XmDrawingAreaCallbackStruct;
Indicates why the callback was invoked Points to the XEvent that triggered the callback. This is NULL for the XmNresizeCallback. Is set to
the widget window
Translations
XmDrawingArea inherits translations from XmManager. Before calling the XmManager actions, all events in the inherited translations except
<BtnMotion>, <EnterWindow>, <LeaveWindow>, <FocusIn>, and <FocusOut> also call the DrawingAreaInput() action.
XmDrawingArea has the additional translations listed below. These translations may not directly correspond to a translation table. MAny
BAny Press:DrawingAreaInput() MAny BAny Release:DrawingAreaInput() MAny KAny Press:DrawingAreaInput()
ManagerGadgetKeyInput() MAny KAny Release:DrawingAreaInput()
Action Routines
The XmDrawingArea action routines are described below: Unless the event takes place in a gadget, calls the callbacks for XmNinputCallback.
Causes the current gadget to process a keyboard event.
Additional Behavior
The XmDrawingArea widget has the additional behavior described below: Calls the callbacks for XmNexposeCallback. Calls the callbacks for
XmNresizeCallback.
Virtual Bindings
The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings(3X).
SEE ALSO
Composite(3X), Constraint(3X), Core(3X), XmCreateDrawingArea(3X), XmManager(3X)
XmDrawingArea(3X)