NAME

XmPrimitive − The Primitive widget class

SYNOPSIS

#include <Xm/Xm.h>

DESCRIPTION

Primitive is a widget class used as a supporting superclass for other widget classes.  It handles border drawing and highlighting, traversal activation and deactivation, and various callback lists needed by Primitive widgets. 

Classes

Primitive inherits behavior and resources from Core class. 

The class pointer is xmPrimitiveWidgetClass. 

The class name is XmPrimitive. 

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). 

XmNbottomShadowColor
Specifies the color to use to draw the bottom and right sides of the border shadow. This color is used if the XmNtopShadowPixmap resource is unspecified. 

XmNbottomShadowPixmap
Specifies the pixmap to use to draw the bottom and right sides of the border shadow.

XmNforeground
Specifies the foreground drawing color used by Primitive widgets.

XmNhelpCallback
Specifies the list of callbacks that is called when the help key is pressed.  The reason sent by the callback is XmCR_HELP. 

XmNhighlightColor
Specifies the color of the highlighting rectangle. This color is used if the highlight pixmap resource is XmUNSPECIFIED_PIXMAP. 

XmNhighlightOnEnter
Specifies if the highlighting rectangle is drawn when the cursor moves into the widget. If the shell’s focus policy is XmEXPLICIT, this resource is ignored, and the widget is highlighted when it has the focus.  If the shell’s focus policy is XmPOINTER and if this resource is True, the highlighting rectangle is drawn when the the cursor moves into the widget.  If the shell’s focus policy is XmPOINTER and if this resource is False, the highlighting rectangle is not drawn when the the cursor moves into the widget.  The default is False. 

XmNhighlightPixmap
Specifies the pixmap used to draw the highlighting rectangle.

XmNhighlightThickness
Specifies the thickness of the highlighting rectangle.

XmNnavigationType
Determines whether the widget is a tab group.

       •XmNONE indicates that the widget is not a tab group. 

       •XmTAB_GROUP indicates that the widget is a tab group, unless another widget in the hierarchy has an XmNnavigationType of XmEXCLUSIVE_TAB_GROUP. 

       •XmSTICKY_TAB_GROUP indicates that the widget is a tab group, even if another widget in the hierarchy has an XmNnavigationType of XmEXCLUSIVE_TAB_GROUP. 

       •XmEXCLUSIVE_TAB_GROUP indicates that the widget is a tab group and that widgets in the hierarchy whose XmNnavigationType is XmTAB_GROUP are not tab groups.  When a parent widget has an XmNnavigationType of XmEXCLUSIVE_TAB_GROUP, traversal of non-tab-group widgets within the group is based on the order of those widgets in their parent’s XmNchildren list.  When any widget in a hierarchy has an XmNnavigationType of XmEXCLUSIVE_TAB_GROUP, traversal of tab groups in the hierarchy proceeds to widgets in the order in which their XmNnavigationType resources were specified as XmEXCLUSIVE_TAB_GROUP or XmSTICKY_TAB_GROUP, whether by creating the widgets with that value, by calling XtSetValues, or by calling XmAddTabGroup. 

XmNshadowThickness
Specifies the size of the drawn border shadow.

XmNtopShadowColor
Specifies the color to use to draw the top and left sides of the border shadow. This color is used if the XmNtopShadowPixmap resource is unspecified. 

XmNtopShadowPixmap
Specifies the pixmap to use to draw the top and left sides of the border shadow.

XmNtraversalOn
Specifies if traversal is activated for this widget.  In CascadeButton and CascadeButtonGadget, this resource is forced to TRUE unless the parent is an OptionMenu.

XmNunitType
Provides the basic support for resolution independence. It defines the type of units a widget uses with sizing and positioning resources. If the widget’s parent is a subclass of XmManager and if the XmNunitType resource is not explicitly set, it defaults to the unit type of the parent widget.  If the widget’s parent is not a subclass of XmManager, the resource has a default unit type of XmPIXELS.  XmNunitType can have the following values:

       •XmPIXELS—all values provided to the widget are treated as normal pixel values. 

       •Xm100TH_MILLIMETERS—all values provided to the widget are treated as 1/100 millimeter. 

       •Xm1000TH_INCHES—all values provided to the widget are treated as 1/1000 inch. 

       •Xm100TH_POINTS—all values provided to the widget are treated as 1/100 point.  A point is a unit used in text processing applications and is defined as 1/72 inch. 

       •Xm100TH_FONT_UNITS—all values provided to the widget are treated as 1/100 of a font unit.  A font unit has horizontal and vertical components.  These are the values of the XmScreen resources XmNhorizontalFontUnit and XmNverticalFontUnit. 

XmNuserData
Allows the application to attach any necessary specific data to the widget. It is an internally unused resource.

Dynamic Color Defaults

The foreground, background, top shadow, bottom shadow, and highlight color resources are dynamically defaulted.  If no color data is specified, the colors are automatically generated.  On a single-plane system, a black and white color scheme is generated.  Otherwise, four colors are generated, which display the correct shading for the 3-D visuals.  If the background is the only color specified for a widget, the top shadow and bottom shadow colors are generated to give the 3-D appearance.  Foreground and highlight colors are generated to provide sufficient contrast with the background color. 

Colors are generated only at creation.  Resetting the background through XtSetValues does not regenerate the other colors.  XmChangeColor can be used to recalculate all associated colors based on a new background color. 

Inherited Resources

Primitive inherits behavior and resources from the following superclass.  For a complete description of each resource, refer to the man page for that superclass. 

Callback Information

A pointer to the following structure is passed to each callback:

typedef struct
{
intreason;
XEvent* event;
} XmAnyCallbackStruct;

reasonIndicates why the callback was invoked.  For this callback, reason is set to XmCR_HELP. 

eventPoints to the XEvent that triggered the callback. 

Translations

The XmPrimitive translations are listed below.  These translations may not directly correspond to a translation table. 

Note that for buttons in menus, altering translations in #override or #augment mode is undefined. 

KUp:PrimitiveTraverseUp()
KDown:PrimitiveTraverseDown()
KLeft:PrimitiveTraverseLeft()
KRight:PrimitiveTraverseRight()
KBeginLine:PrimitiveTraverseHome()
KNextField:PrimitiveNextTabGroup()
KPrevField:PrimitivePrevTabGroup()
KActivate:PrimitiveParentActivate()
KCancel:PrimitiveParentCancel()
KHelp:PrimitiveHelp()

Action Routines

The XmPrimitive action routines are described below:

PrimitiveHelp():
Calls the callbacks for XmNhelpCallback if any exist.  If there are no help callbacks for this widget, this action calls the help callbacks for the nearest ancestor that has them. 

PrimitiveNextTabGroup():
Traverses to the first item in the next tab group.  If the current tab group is the last entry in the tab group list, it wraps to the beginning of the tab group list.

PrimitiveParentActivate():
If the parent is a manager, passes the KActivate event received by the widget to the parent. 

PrimitiveParentCancel():
If the parent is a manager, Passes the KCancel event received by the widget to the parent. 

PrimitivePrevTabGroup():
Traverses to the first item in the previous tab group. If the beginning of the tab group list is reached, it wraps to the end of the tab group list.

PrimitiveTraverseDown():
Traverses to the next item below the current widget in the current tab group, wrapping if necessary.

PrimitiveTraverseHome():
Traverses to the first widget or gadget in the current tab group.

PrimitiveTraverseLeft():
Traverses to the next item to the left of the current widget in the current tab group, wrapping if necessary.

PrimitiveTraverseNext():
Traverses to the next item in the current tab group, wrapping if necessary.

PrimitiveTraversePrev():
Traverses to the previous item in the current tab group, wrapping if necessary.

PrimitiveTraverseRight():
Traverses to the next item to the right of the current gadget in the current tab group, wrapping if necessary.

PrimitiveTraverseUp():
Traverses to the next item above the current gadget in the current tab group, wrapping if necessary.

Additional Behavior

This widget has the additional behavior described below:

<FocusIn>:
If the shell’s keyboard focus policy is XmEXPLICIT, highlights the widget and gives it the focus. 

<FocusOut>:
If the shell’s keyboard focus policy is XmEXPLICIT, unhighlights the widget and removes the focus. 

Virtual Bindings

The bindings for virtual keys are vendor specific.  For information about bindings for virtual buttons and keys, see VirtualBindings(3X). 

RELATED INFORMATION

Core(3X), XmChangeColor(3X), and XmScreen(3X).