XmDrawingArea(3X)
XmDrawingArea --The DrawingArea widget class
As shipped in IRIX 6.5.15. Unchanged since IRIX 6.5.
NAME XmDrawingArea --The DrawingArea widget class SYNOPSIS #include <Xm/DrawingA.h> VERSION This page documents version 1.2 of the Motif library. 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 sup- ports minimal geometry management for multiple widget or gadget children. Classes DrawingArea inherits behavior and resources from the Core, Composite, Con- straint, 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 program- mer 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 re- maining letters (in either lowercase or uppercase, but include any under- scores 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 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 super- classes. 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 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. window Is set to the widget window Translations XmDrawingArea inherits translations from XmManager. Before calling the Xm- Manager actions, all events in the inherited translations except <BtnMo- tion>, <EnterWindow>, <LeaveWindow>, <FocusIn>, and <FocusOut> also call the DrawingAreaInput() action. XmDrawingArea has the additional translations listed below. These transla- tions 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 Xm- Manager(3X). XmDrawingArea(3X)