XmDrawingArea(3X) OSF/Motif XmDrawingArea(3X)NAMEXmDrawingArea - 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 invok‐
ing 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 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).
XmDrawingArea Resource Set
───────────────────────────────────────────────────────
Name Default Access
Class Type
───────────────────────────────────────────────────────
───────────────────────────────────────────────────────
XmNexposeCallback NULL C
XmCCallback XtCallbackList
───────────────────────────────────────────────────────
XmNinputCallback NULL C
XmCCallback XtCallbackList
───────────────────────────────────────────────────────
XmNmarginHeight 10 CSG
XmCMarginHeight Dimension
───────────────────────────────────────────────────────
XmNmarginWidth 10 CSG
XmCMarginWidth Dimension
───────────────────────────────────────────────────────
XmNresizeCallback NULL C
XmCCallback XtCallbackList
───────────────────────────────────────────────────────
XmNresizePolicy XmRESIZE_ANY CSG
XmCResizePolicy unsigned char
───────────────────────────────────────────────────────
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 keyboard 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 mini‐
mum 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 widgets. 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 super‐
classes. For a complete description of each resource, refer to the man
page for that superclass.
XmManager Resource Set
────────────────────────────────────────────────────────────────
Name Default Access
Class Type
────────────────────────────────────────────────────────────────
────────────────────────────────────────────────────────────────
XmNbottomShadowColor dynamic CSG
XmCBottomShadowColor Pixel
────────────────────────────────────────────────────────────────
XmNbottomShadowPixmap XmUNSPECIFIED_PIXMAP CSG
XmCBottomShadowPixmap Pixmap
────────────────────────────────────────────────────────────────
XmNforeground dynamic CSG
XmCForeground Pixel
────────────────────────────────────────────────────────────────
XmNhelpCallback NULL C
XmCCallback XtCallbackList
────────────────────────────────────────────────────────────────
XmNhighlightColor dynamic CSG
XmCHighlightColor Pixel
────────────────────────────────────────────────────────────────
XmNhighlightPixmap dynamic CSG
XmCHighlightPixmap Pixmap
────────────────────────────────────────────────────────────────
XmNinitialFocus NULL CSG
XmCInitialFocus Widget
────────────────────────────────────────────────────────────────
XmNnavigationType XmTAB_GROUP CSG
XmCNavigationType XmNavigationType
────────────────────────────────────────────────────────────────
XmNshadowThickness 0 CSG
XmCShadowThickness Dimension
────────────────────────────────────────────────────────────────
XmNstringDirection dynamic CG
XmCStringDirection XmStringDirection
────────────────────────────────────────────────────────────────
XmNtopShadowColor dynamic CSG
XmCTopShadowColor Pixel
────────────────────────────────────────────────────────────────
XmNtopShadowPixmap dynamic CSG
XmCTopShadowPixmap Pixmap
────────────────────────────────────────────────────────────────
XmNtraversalOn True CSG
XmCTraversalOn Boolean
────────────────────────────────────────────────────────────────
XmNunitType dynamic CSG
XmCUnitType unsigned char
────────────────────────────────────────────────────────────────
XmNuserData NULL CSG
XmCUserData XtPointer
────────────────────────────────────────────────────────────────
Composite Resource Set
──────────────────────────────────────────────────────
Name Default Access
Class Type
──────────────────────────────────────────────────────
──────────────────────────────────────────────────────
XmNchildren NULL G
XmCReadOnly WidgetList
──────────────────────────────────────────────────────
XmNinsertPosition NULL CSG
XmCInsertPosition XtOrderProc
──────────────────────────────────────────────────────
XmNnumChildren 0 G
XmCReadOnly Cardinal
──────────────────────────────────────────────────────
Core Resource Set
─────────────────────────────────────────────────────────────────────
Name Default Access
Class Type
─────────────────────────────────────────────────────────────────────
─────────────────────────────────────────────────────────────────────
XmNaccelerators dynamic CSG
XmCAccelerators XtAccelerators
─────────────────────────────────────────────────────────────────────
XmNancestorSensitive dynamic G
XmCSensitive Boolean
─────────────────────────────────────────────────────────────────────
XmNbackground dynamic CSG
XmCBackground Pixel
─────────────────────────────────────────────────────────────────────
XmNbackgroundPixmap XmUNSPECIFIED_PIXMAP CSG
XmCPixmap Pixmap
─────────────────────────────────────────────────────────────────────
XmNborderColor XtDefaultForeground CSG
XmCBorderColor Pixel
─────────────────────────────────────────────────────────────────────
XmNborderPixmap XmUNSPECIFIED_PIXMAP CSG
XmCPixmap Pixmap
─────────────────────────────────────────────────────────────────────
XmNborderWidth 0 CSG
XmCBorderWidth Dimension
─────────────────────────────────────────────────────────────────────
XmNcolormap dynamic CG
XmCColormap Colormap
─────────────────────────────────────────────────────────────────────
XmNdepth dynamic CG
XmCDepth int
─────────────────────────────────────────────────────────────────────
XmNdestroyCallback NULL C
XmCCallback XtCallbackList
─────────────────────────────────────────────────────────────────────
XmNheight dynamic CSG
XmCHeight Dimension
─────────────────────────────────────────────────────────────────────
XmNinitialResourcesPersistent True C
XmCInitialResourcesPersistent Boolean
─────────────────────────────────────────────────────────────────────
XmNmappedWhenManaged True CSG
XmCMappedWhenManaged Boolean
─────────────────────────────────────────────────────────────────────
XmNscreen dynamic CG
XmCScreen Screen *
─────────────────────────────────────────────────────────────────────
XmNsensitive True CSG
XmCSensitive Boolean
─────────────────────────────────────────────────────────────────────
XmNtranslations dynamic CSG
XmCTranslations XtTranslations
─────────────────────────────────────────────────────────────────────
XmNwidth dynamic CSG
XmCWidth Dimension
─────────────────────────────────────────────────────────────────────
XmNx 0 CSG
XmCPosition Position
─────────────────────────────────────────────────────────────────────
XmNy 0 CSG
XmCPosition Position
─────────────────────────────────────────────────────────────────────
Callback Information
A pointer to the following structure is passed to each callback: type‐
def 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() ManagerGadgetKeyIn‐
put() 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).
RELATED INFORMATIONComposite(3X), Constraint(3X), Core(3X), XmCreateDrawingArea(3X), and
XmManager(3X).
XmDrawingArea(3X)
