Content-type: text/html Man page of XmDrawingArea

XmDrawingArea

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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 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 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 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: 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: 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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
Classes
New Resources
Inherited Resources
Callback Information
Translations
Action Routines
Additional Behavior
Virtual Bindings
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:41:11 GMT, October 02, 2010