XmDrawingArea(3X)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
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 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 minimum spacing in pix‐
els 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. Speci‐
fies 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
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: XmNavigationType
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: XmCMappedWhenManaged
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: Position
Access: CSG
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 trig‐
gered 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:DrawingAreaIn‐
put()
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 ALSOComposite(3X), Constraint(3X), Core(3X), XmCreateDrawingArea(3X),
XmManager(3X)XmDrawingArea(3X)
