XmDrawingArea(3X) X11 SDE 5.4R3.00 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
Name Class Type Default Access
-----------------------------------------------------------------------------
XmNexposeCallback XmCCallback XtCallbackList NULL C
XmNinputCallback XmCCallback XtCallbackList NULL C
XmNmarginHeight XmCMarginHeight Dimension 10 CSG
XmNmarginWidth XmCMarginWidth Dimension 10 CSG
XmNresizeCallback XmCCallback XtCallbackList NULL C
XmNresizePolicy XmCResizePolicy unsigned char XmRESIZE_ANY CSG
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XmDrawingArea(3X) X11 SDE 5.4R3.00 XmDrawingArea(3X)
XmNexposeCallback
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.
XmNinputCallback
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.
XmNmarginHeight
Specifies the minimum spacing in pixels between the top or
bottom edge of DrawingArea and any child widget.
XmNmarginWidth
Specifies the minimum spacing in pixels between the left or
right edge of DrawingArea and any child widget.
XmNresizeCallback
Specifies the list of callbacks that is called when the
DrawingArea is resized. The callback reason is
XmCR_RESIZE.
XmNresizePolicy
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
superclasses. For a complete description of each resource, refer to
the man page for that superclass.
XmManager Resource Set
Name Class Type Default Access
--------------------------------------------------------------------------------------------------
XmNbottomShadowColor XmCBottomShadowColor Pixel dynamic CSG
XmNbottomShadowPixmap XmCBottomShadowPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG
XmNforeground XmCForeground Pixel dynamic CSG
XmNhelpCallback XmCCallback XtCallbackList NULL C
XmNhighlightColor XmCHighlightColor Pixel dynamic CSG
XmNhighlightPixmap XmCHighlightPixmap Pixmap dynamic CSG
XmNinitialFocus XmCInitialFocus Widget NULL CSG
XmNnavigationType XmCNavigationType XmNavigationType XmTAB_GROUP CSG
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XmDrawingArea(3X) X11 SDE 5.4R3.00 XmDrawingArea(3X)
XmNshadowThickness XmCShadowThickness Dimension 0 CSG
XmNstringDirection XmCStringDirection XmStringDirection dynamic CG
XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG
XmNtopShadowPixmap XmCTopShadowPixmap Pixmap dynamic CSG
XmNtraversalOn XmCTraversalOn Boolean True CSG
XmNunitType XmCUnitType unsigned char dynamic CSG
XmNuserData XmCUserData XtPointer NULL CSG
Composite Resource Set
Name Class Type Default Access
-----------------------------------------------------------------------
XmNchildren XmCReadOnly WidgetList NULL G
XmNinsertPosition XmCInsertPosition XtOrderProc NULL CSG
XmNnumChildren XmCReadOnly Cardinal 0 G
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 0 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
Callback Information
A pointer to the following structure is passed to each callback:
typedef struct { int reason; XEvent * event;
Window window; } XmDrawingAreaCallbackStruct;
reason Indicates why the callback was invoked
event Points to the XEvent that triggered the callback. This is
NULL for the XmNresizeCallback.
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XmDrawingArea(3X) X11 SDE 5.4R3.00 XmDrawingArea(3X)
window 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:
DrawingAreaInput():
Unless the event takes place in a gadget, calls the
callbacks for XmNinputCallback.
ManagerGadgetKeyInput():
Causes the current gadget to process a keyboard event.
Additional Behavior
The XmDrawingArea widget has the additional behavior described below:
<Expose>: Calls the callbacks for XmNexposeCallback.
<Widget Resize>:
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 INFORMATION
Composite(3X), Constraint(3X), Core(3X), XmCreateDrawingArea(3X), and
XmManager(3X).
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