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,
traversal 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
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).
+-------------------------------------------------------------------------------------------------+
| | 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
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.
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 XmEXCLUSIVE_TAB_GROUP.
XmSTICKY_TAB_GROUP
Indicates that the widget is a tab group, even if
the XmNnavigationType of another widget in the
hierarchy is 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 the XmNnavigationType of any widget in a
hierarchy is 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
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 applications 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 applications 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 components. 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
VendorShell(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)