XmGadget(library call) XmGadget(library call)
NAME
XmGadget -- The Gadget widget class
SYNOPSIS
#include <Xm/Xm.h>
DESCRIPTION
Gadget is a widget class used as a supporting superclass for other gadget classes. It handles shadow-border drawing and highlighting, tra-
versal activation and deactivation, and various callback lists needed by gadgets.
The color and pixmap resources defined by XmManager are directly used by gadgets. If XtSetValues is used to change one of the resources for
a manager widget, all of the gadget children within the manager also change.
Classes
Gadget inherits behavior and resources from Object and RectObj.
The class pointer is xmGadgetClass.
The class name is XmGadget.
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 val-
ues 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).
+-------------------------------------------------------------------------------------------------+
| | XmGadget Resource Set | | |
|Name | Class | Type | Default | Access |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNbackground | XmCBackground | Pixel | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNbackgroundPixmap | XmCPixmap | Pixmap | XmUNSPECIFIED_PIXMAP | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNbottomShadowColor | XmCBottomShadowColor | Pixel | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNbottomShadowPixmap | XmCBottomShadowPixmap | Pixmap | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNhelpCallback | XmCCallback | XtCallbackList | NULL | C |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNforeground | XmCForeground | Pixel | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNhighlightColor | XmCHighlightColor | Pixel | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNhighlightOnEnter | XmCHighlightOnEnter | Boolean | False | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNhighlightPixmap | XmCHighlightPixmap | Pixmap | dynamic | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNhighlightThickness | XmCHighlightThickness | Dimension | 2 | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNlayoutDirection | XmNCLayoutDirection | XmDirection | dynamic | CG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNnavigationType | XmCNavigationType | XmNavigationType | XmNONE | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNshadowThickness | XmCShadowThickness | Dimension | 2 | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
|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 |
+----------------------+-----------------------+------------------+----------------------+--------+
|XmNtoolTipString | XmCToolTipString | XmString | NULL | CSG |
+----------------------+-----------------------+------------------+----------------------+--------+
+----------------------+-----------------------+------------------+----------------------+--------+
XmNbackground
Specifies the background color for the gadget.
XmNbackgroundPixmap
Specifies a pixmap for tiling the background. The first tile is placed at the upper left corner of the widget's window.
XmNbottomShadowColor
Contains the color to use to draw the bottom and right sides of the border shadow.
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 sequence is pressed. The reason sent by the callback is
XmCR_HELP.
XmNhighlightColor
Contains the color of the highlighting rectangle.
XmNhighlightOnEnter
Specifies if the highlighting rectangle is drawn when the cursor moves into the widget. If the shell's focus policy is XmEX-
PLICIT, 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.
XmNlayoutDirection
Specifies the direction in which components of the manager (including strings) are laid out. The values are of type XmDirection.
If the widget's parent is a manager or shell, the value is inherited from the widget's parent. Otherwise, it is inherited from
the closest ancestor vendor or menu shell.
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 the XmNnavigationType of another widget in the hierarchy is XmEXCLU-
SIVE_TAB_GROUP.
XmSTICKY_TAB_GROUP
Indicates that the widget is a tab group, even if the XmNnavigationType of another widget in the hierarchy is XmEXCLU-
SIVE_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 the XmNnavigationType of any widget in a hierarchy is XmEXCLUSIVE_TAB_GROUP, traversal of tab groups in the hier-
archy proceeds to widgets in the order in which their XmNnavigationType resources were specified as XmEXCLU-
SIVE_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
Contains the color to use to draw the top and left sides of the border shadow.
XmNtopShadowPixmap
Specifies the pixmap to use to draw the top and left sides of the border shadow.
XmNtraversalOn
Specifies traversal activation for this gadget.
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.
The unit type can also be specified in resource files, with the following format:
<floating value><unit>
where:
unit is <" ", pixels, inches, centimeters, millimeters, points, font units>
pixels is <pix, pixel, pixels>
inches is <in, inch, inches>
centimeter
is <cm, centimeter, centimeters>
millimeters
is <mm, millimeter, millimeters>
points is <pt, point, points>
font units
is <fu, font_unit, font_units>
float is {"+"|"-"}{{<"0"-"9">*}.}<"0"-"9">*
Note that the type Dimension must always be positive.
For example,
xmfonts*XmMainWindow.height: 10.4cm
*PostIn.width: 3inches
XmNunitType can have the following values:
XmPIXELS All values provided to the widget are treated as normal pixel values.
XmMILLIMETERS
All values provided to the widget are treated as normal millimeter values.
Xm100TH_MILLIMETERS
All values provided to the widget are treated as 1/100 of a millimeter.
XmCENTIMETERS
All values provided to the widget are treated as normal centimeter values.
XmINCHES All values provided to the widget are treated as normal inch values.
Xm1000TH_INCHES
All values provided to the widget are treated as 1/1000 of an inch.
XmPOINTS All values provided to the widget are treated as normal point values. A point is a unit used in text processing appli-
cations and is defined as 1/72 of an inch.
Xm100TH_POINTS
All values provided to the widget are treated as 1/100 of a point. A point is a unit used in text processing applica-
tions and is defined as 1/72 inch.
XmFONT_UNITS
All values provided to the widget are treated as normal font units. A font unit has horizontal and vertical components.
These are the values of the XmScreen resources XmNhorizontalFontUnit and XmNverticalFontUnit.
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 compo-
nents. These are the values of the XmScreen resources XmNhorizontalFontUnit and XmNverticalFontUnit.
XmNuserData
Allows the application to attach any necessary specific data to the gadget. This is an internally unused resource.
XmNtoolTipString
The XmString to display as the toolTip. If this resource is NULL, no tip will be displayed. ToolTips are described in Vendor-
Shell(3)
Inherited Resources
Gadget inherits resources from the superclass described in the following table. For a complete description of each resource, refer to the
reference page for that superclass.
+---------------------------------------------------------------------+
| | RectObj Resource Set | | |
|Name | Class | Type | Default | Access |
+---------------------+----------------+-----------+---------+--------+
|XmNancestorSensitive | XmCSensitive | Boolean | dynamic | G |
+---------------------+----------------+-----------+---------+--------+
|XmNborderWidth | XmCBorderWidth | Dimension | 0 | N/A |
+---------------------+----------------+-----------+---------+--------+
|XmNheight | XmCHeight | Dimension | dynamic | CSG |
+---------------------+----------------+-----------+---------+--------+
|XmNsensitive | XmCSensitive | Boolean | True | CSG |
+---------------------+----------------+-----------+---------+--------+
|XmNwidth | XmCWidth | Dimension | dynamic | CSG |
+---------------------+----------------+-----------+---------+--------+
|XmNx | XmCPosition | Position | 0 | CSG |
+---------------------+----------------+-----------+---------+--------+
|XmNy | XmCPosition | Position | 0 | CSG |
+---------------------+----------------+-----------+---------+--------+
+---------------------+----------------+-----------+---------+--------+
+---------------------------------------------------------------------+
| | Object Resource Set | | |
|Name | Class | Type | Default | Access |
+-------------------+-------------+----------------+---------+--------+
|XmNdestroyCallback | XmCCallback | XtCallbackList | NULL | C |
+-------------------+-------------+----------------+---------+--------+
+-------------------+-------------+----------------+---------+--------+
Callback Information
A pointer to the following structure is passed to each callback:
typedef struct
{
int reason;
XEvent * event;
} XmAnyCallbackStruct;
reason Indicates why the callback was invoked. For this callback, reason is set to XmCR_HELP.
event Points to the XEvent that triggered the callback.
Behavior
Gadgets cannot have translations associated with them. Because of this, a Gadget's behavior is determined by the Manager widget into which
the Gadget is placed. If focus is on a Gadget, events are passed to the Gadget by its Manager.
RELATED
Object(3), RectObj(3), XmManager(3), and XmScreen(3).
XmGadget(library call)