ExmGrid(3X) UNIX System V ExmGrid(3X)
NAME
ExmGrid - The Grid widget class
SYNOPSIS
#include <Exm/Grid.h>
VERSION
This page documents Motif 2.1.
DESCRIPTION
ExmGrid is a demonstration widget. OSF provides this widget
solely to teach programmers how to write their own Motif
widgets. OSF does not support this widget in any way.
The source code for the ExmGrid widget illustrates how to do
the following:
o Write a Motif-style manager widget supporting Motif-
style resources and constraints
o Install the XmQTdialogShellSavvy trait and its methods
o Install the XmQTspecifyRenderTable trait and its
methods
ExmGrid is a general-purpose manager capable of containing
any widget type as a child. In general, it requires no
special knowledge about how its children function.
ExmGrid is like a light-weight version of the standard Motif
toolkit XmRowColumn widget. (XmRowColumn has an order of
magnitude more code than ExmGrid.) Like XmRowColumn,
ExmGrid lays out its children widgets within the cells of a
two-dimensional matrix. Unlike XmRowColumn, ExmGrid cannot
manage menus.
ExmGrid ignores the value of the XmNshadowThickness resource
of XmManager.
Classes
ExmGrid inherits behavior and resources from Core,
Composite, Constraint and XmManager.
The class pointer is exmGridWidgetClass.
The class name is ExmGrid.
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
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or by class in a .Xdefaults file, remove the XmN, ExmN, XmC
or ExmC prefix and use the remaining letters. To specify one
of the defined values for a resource in a .Xdefaults file,
remove the Xm or Exm 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).
ExmGrid Resource Set
Name Class Type Default Access
XmNbuttonRenderTable XmCButtonRenderTable XmRenderTable NULL CSG
XmNcolumns XmCColumns short 4 CSG
XmNdefaultPosition XmCDefaultPosition Boolean true CSG
XmNdialogTitle XmCDialogTitle XmString NULL CSG
XmNlabelRenderTable XmCLabelRenderTable XmRenderTable NULL CSG
XmNmapCallback XmCCallback XtCallbackList NULL C
XmNmarginHeight XmCMarginHeight Dimension 10 CSG
XmNmarginWidth XmCMarginWidth Dimension 10 CSG
XmNrows XmCRows short 4 CSG
XmNtextRenderTable XmCTextRenderTable XmRenderTable NULL CSG
XmNunmapCallback XmCCallback XtCallbackList NULL C
XmNbuttonRenderTable
Specifies the default button render table used by
Grid's button descendants (for example,
ExmCommandButton or XmPushButton). If a button
descendant has not defined a render table, Motif
searches the button descendants parent hierarchy
for the first ancestor that has the
XmQTspecifyRenderTable trait installed. (For
example, VendorShell, MenuShell, ExmGrid,
XmBulletinBoard and its subclasses all install the
XmQTspecifyRenderTable trait.) If the first
ancestor encountered is an ExmGrid widget, then
the value of XmNbuttonRenderTablebecomes the
button descendant's render table. If
XmNbuttonRenderTable of ExmGrid is NULL, then
Motif continues searching ancestors until it finds
one that defines a button render table. Refer to
XmRenderTable(3) for more information on the
creation and structure of a render table.
XmNcolumns
Specifies the number of columns in the Grid. The
default is 4 columns.
XmNdefaultPosition
Controls the positioning of a DialogShell managing
a Grid. This resource has no influence if the
Grid is not managed by a DialogShell. If
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XmNdefaultPosition is true, the DialogShell will
center itself at the center of its own parent.
For example, if the parent of the DialogShell is
an ApplicationShell, then the center of the
DialogShell will be at the same coordinates as the
center of the ApplicationShell. If the
DialogShell becomes unmapped (but stays managed)
and then remapped, this resource has no influence
on the DialogShell's position. If this resource
is False, the DialogShell does not automatically
center itself. Instead, the DialogShell (and
therefore the Grid) will be positioned according
to the values of XmNxand XmNy. Motif will treat
the values of XmNxand XmNy as offsets from the
upper-left corner of the screen (rather than as
offsets from the upper-left corner of the parent
shell).
XmNdialogTitle
Specifies the dialog title. If this resource is
not NULL, and the parent of the Grid is a subclass
of WMShell, Grid sets the XmNtitle and
XmNtitleEncoding of its parent. If the only
character set in XmNdialogTitle is ISO8859-1,
XmNtitle is set to the string of the title, and
XmNtitleEncoding is set to STRING. If
XmNdialogTitle contains character sets other than
ISO8859-1, XmNtitle is set to the string of the
title converted to a compound text string, and
XmNtitleEncoding is set to COMPOUND_TEXT. The
direction of the title is based on the
XmNlayoutDirection resource of the widget.
XmNlabelRenderTable
Specifies the default button render table used by
Grid's label descendants (for example, ExmString
or XmLabel). If a label descendant has not
defined a render table, Motif searches the label
descendants parent hierarchy for the first
ancestor that has the XmQTspecifyRenderTable trait
installed. (For example, VendorShell, MenuShell,
ExmGrid, XmBulletinBoard and its subclasses all
install the XmQTspecifyRenderTable trait.) If the
first ancestor encountered is an ExmGrid widget,
then the value of XmNlabelRenderTablebecomes the
label descendant's render table. If
XmNlabelRenderTable of ExmGrid is NULL, then Motif
continues searching ancestors until it finds one
that defines a label render table. Refer to
XmRenderTable(3) for more information on the
creation and structure of a render table.
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XmNmapCallback
Specifies the list of callbacks that is called
only when the parent of the Grid is a DialogShell.
If the parent of the Grid is not a DialogShell,
XmNmapCallback has no influence. Assuming that
the parent of the Grid is a DialogShell, the
callback list is invoked when the DialogShell (and
therefore the Grid) is mapped. The callback
reason is XmCR_MAP. DialogShells are usually
mapped when the Grid is managed.
XmNmarginHeight
Specifies the amount of blank space between the
top edge of the Grid widget and the first item in
each column, and between the bottom edge of the
Grid widget and the last item in each column. The
default value is 10 pixels.
XmNmarginWidth
Specifies the amount of blank space between the
left edge of the Grid widget and the first item in
each row, and between the right edge of the Grid
widget and the last item in each row. The default
value is 10 pixels.
XmNrows Specifies the number of rows in the Grid. The
default is 4 rows.
XmNtextRenderTable
Specifies the default button render table used by
Grid's text descendants (for example, XmText,
XmTextField, and XmList). If a text descendant
has not defined a render table, Motif searches the
text descendants parent hierarchy for the first
ancestor that has the XmQTspecifyRenderTable trait
installed. (For example, VendorShell, MenuShell,
ExmGrid, XmBulletinBoard and its subclasses all
install the XmQTspecifyRenderTable trait.) If the
first ancestor encountered is an ExmGrid widget,
then the value of XmNtextRenderTablebecomes the
text descendant's render table. If
XmNtextRenderTable of ExmGrid is NULL, then Motif
continues searching ancestors until it finds one
that defines a text render table. Refer to
XmRenderTable(3) for more information on the
creation and structure of a render table.
XmNunmapCallback
Specifies the list of callbacks that is called
only when the parent of the Grid is a DialogShell.
In this case, this callback list is invoked when
the Grid is unmapped. The callback reason is
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XmCR_UNMAP. DialogShells are usually unmapped when
the Grid is unmanaged.
ExmGrid Constraint Resource Set
Name Class Type Default Access
ExmNgridMarginHeightWithinCell ExmCGridMarginHeightWithinCell Dimension 0 CSG
ExmNgridMarginWidthWithinCell ExmCGridMarginWidthWithinCell Dimension 0 CSG
ExmNgridMarginHeightWithinCell
Specifies the amount of blank space between the
top edge of a child widget and the top of its
cell. Also specifies the amount of blank space
between the bottom edge of a child widget and the
bottom of its cell.
ExmNgridMarginWidthWithinCell
Specifies the amount of blank space between the
left edge of a child widget and the left edge of
its cell. Also specifies the amount of blank space
between the right edge of a child widget and the
right edge of its cell.
Inherited Resources
ExmGrid inherits behavior and resources from the following
superclasses. For a complete description of each resource,
refer to the reference page for that superclass.
XmManager Resource Set
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
XmNlayoutDirection XmCLayoutDirection XmDirection dynamic CG
XmNnavigationType XmCNavigationType XmNavigationType XmTAB_GROUP CSG
XmNpopupHandlerCallback XmCCallback XtCallbackList NULL C
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
Composite Resource Set
Name Class Type Default Access
XmNchildren XmCReadOnly WidgetList NULL G
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XmNinsertPosition XmCInsertPosition XtOrderProc NULL CSG
XmNnumChildren XmCReadOnly Cardinal 0 G
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 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
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
Translations
ExmGrid inherits all the translations of XmManager. ExmGrid
does not provide any additional translations beyond those
defined by XmManager.
Action Routines
ExmGrid provides no action routines of its own.
RELATED
Core(3), Composite(3), Constraint(3), and XmManager(3).
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