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Core(3) Library Functions Manual Core(3) NAME Core -- The Core widget class SYNOPSIS #include <Xm/Xm.h> DESCRIPTION Core is the Xt Intrinsic base class for windowed widgets. The Object and RectObj classes provide support for windowless widgets. Classes All widgets are built from Core. The class pointer is widgetClass. The class name is Core. 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 re- source by name or by class in a .Xdefaults file, remove the XmN or XmC pre- fix 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 be- tween words). The codes in the access column indicate if the given re- source can be set at creation time (C), set by using XtSetValues (S), re- trieved by using XtGetValues (G), or is not applicable (N/A). +----------------------------------------------------------------------------------------------------------------+ | | 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 | 1 | 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 | +-------------------------------+-------------------------------+----------------+----------------------+--------+ +-------------------------------+-------------------------------+----------------+----------------------+--------+ XmNaccelerators Specifies a translation table that is bound with its actions in the context of a particular widget. The accelerator table can then be installed on some destination widget. Note that the de- fault accelerators for any widget will always be installed, no matter whether this resource is specified or not. XmNancestorSensitive Specifies whether the immediate parent of the widget receives in- put events. Use the function XtSetSensitive to change the argu- ment to preserve data integrity (see XmNsensitive). For shells, the default is copied from the parent's XmNancestorSensitive re- source if there is a parent; otherwise, it is True. For other widgets, the default is the bitwise AND of the parent's XmNsensi- tive and XmNancestorSensitive resources. XmNbackground Specifies the background color for the widget. XmNbackgroundPixmap Specifies a pixmap for tiling the background. The first tile is placed at the upper left corner of the widget's window. XmNborderColor Specifies the color of the border in a pixel value. XmNborderPixmap Specifies a pixmap to be used for tiling the border. The first tile is placed at the upper left corner of the border. XmNborderWidth Specifies the width of the border that surrounds the widget's window on all four sides. The width is specified in pixels. A width of 0 (zero) means that no border shows. Note that you should use resources like XmNshadowThickness and XmNhighlight- Thickness instead of XmNborderWidth to specify border widths. XmNcolormap Specifies the colormap that is used for conversions to the type Pixel for this widget instance. When this resource is changed, previously generated pixel values are not affected, but newly generated values are in the new colormap. For shells without parents, the default is the default colormap of the widget's screen. Otherwise, the default is copied from the parent. XmNdepth Specifies the number of bits that can be used for each pixel in the widget's window. Applications should not change or set the value of this resource as it is set by the Xt Intrinsics when the widget is created. For shells without parents, the default is the default depth of the widget's screen. Otherwise, the default is copied from the parent. XmNdestroyCallback Specifies a list of callbacks that is called when the widget is destroyed. XmNheight Specifies the inside height (excluding the border) of the wid- get's window. XmNinitialResourcesPersistent Specifies whether or not resources are reference counted. If the value is True when the widget is created, the resources refer- enced by the widget are not reference counted, regardless of how the resource type converter is registered. An application that expects to destroy the widget and wants to have resources deallo- cated should specify a value of False. The default is True, im- plying an assumption that the widget will not be destroyed during the life of the application. XmNmappedWhenManaged If this resource is set to True, it maps the widget (makes it visible) as soon as it is both realized and managed. If this re- source is set to False, the client is responsible for mapping and unmapping the widget. If the value is changed from True to False after the widget has been realized and managed, the widget is un- mapped. XmNscreen Specifies the screen on which a widget instance resides. It is read only. When the Toolkit is initialized, the top-level widget obtains its default value from the default screen of the display. Otherwise, the default is copied from the parent. XmNsensitive Determines whether a widget receives input events. If a widget is sensitive, the Xt Intrinsics' Event Manager dispatches to the widget all keyboard, mouse button, motion, window enter/leave, and focus events. Insensitive widgets do not receive these events. Use the function XtSetSensitive to change the sensitivity argument. Using XtSetSensitive ensures that if a parent widget has XmNsensitive set to False, the ancestor-sensitive flag of all its children is appropriately set. XmNtranslations Points to a translations list. A translations list is a list of events and actions that are to be performed when the events oc- cur. Note that the default translations for any widget will al- ways be installed, no matter whether this resource is specified or not. XmNwidth Specifies the inside width (excluding the border) of the widget's window. XmNx Specifies the x-coordinate of the upper left outside corner of the widget's window. The value is relative to the upper left in- side corner of the parent window. XmNy Specifies the y-coordinate of the upper left outside corner of the widget's window. The value is relative to the upper left in- side corner of the parent window. Translations There are no translations for Core. RELATED Object(3) and RectObj(3). Core(3)
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