XmDrawingArea - The DrawingArea widget class
#include <Xm/DrawingA.h>
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.
DrawingArea inherits behavior and resources from the Core, Composite, Constraint, and XmManager classes.
The class pointer is xmDrawingAreaWidgetClass.
The class name is XmDrawingArea.
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).
| 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 |
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.
DrawingArea inherits behavior and resources from the following superclasses. For a complete description of each resource, refer to the man page for that superclass.
| 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 | XemTAB_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 |
| Name | Class | Type | Default | Access |
|---|---|---|---|---|
| XmNchildren | XmCReadOnly | WidgetList | NULL | G |
| XmNinsertPosition | XmCInsertPosition | XtOrderProc | NULL | CSG |
| XmNnumChildren | XmCReadOnly | Cardinal | 0 | G |
| 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 |
| 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 |
A pointer to the following structure is passed to each callback:
typedef struct
{
int reason;
XEvent * event;
Window window;
} XmDrawingAreaCallbackStruct;
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()
The XmDrawingArea action routines are described below:
The XmDrawingArea widget has the additional behavior described below:
The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings(3X).
Composite(3X), Constraint(3X), Core(3X), XmCreateDrawingArea(3X), and XmManager(3X).