Provided by: libmotif-dev_2.3.8-3.1build1_amd64 
NAME
XmExt18List - The Internationalized Extended List widget
SYNOPSIS
#include <Xm/Ext18List.h>
DESCRIPTION
This widget contains a multi-column list with headers along the top and a search area along the bottom.
The list has scrollbars along the right and bottom edges that allow vertical and horizontal scrolling
both by column and by pixel. The portion of the list data that is currently visible can be altered by
scrollbar actions, widget resource setting and the redisplay of the list data after a string search has
been successful. The sorting of elements within a particular column is also supported. To sort the list
by the elements in a given column, select the column's title.
To search for a particular string in the list, type the string value to be searched for in the list's
associated text field and then press the "Find" pushbutton. The search for the string begins in the
currently selected row, after the location of the previously searched for string, or at the first column
and first row if there is no column selected. If the string is not found in that row, then the search
continues through all rows after and then before, the currently selected row. If the string is found, the
display of the list is adjusted to make the string visible. If the string was not found, or if the string
is visible, the application will issue a warning beep.
Pointer button one allows the user to select a row or a column for sorting. The callbacks on the
doubleClickCallback list are called when the user double clicks pointer button one. If the list data can
contain a row pixmap to display at the extreme left of the row.
Normal Resources
Name Class Type Default
columnTitles ColumnTitles String * NULL
doubleClickCallback Callback Callback NULL
entryData EntryData Xm18RowInfo* NULL
findLabel XmString XmString Find
firstColumn FirstLocation short 0
firstColumnPixmaps FirstColumnPixmaps Boolean False
firstRow FirstLocation short 0
fontList FontList FontList "fixed"
height Dimension VerticalDimension 300
numColumns NumColumns short 0
numRows NumRows short 0
selectedColumn SelectedColumn short 0
selectionPolicy SelectionPolicy SelectionPolicy XmEXTENDED_
SELECT
showFind boolean boolean True
singleSelection Callback Callback NULL
sortFunctions Function Function NULL
title Title String name of
widget
width Dimension Horizontal Dimension
All resource names begin with XmN and all resource class names begin with XmC.
columnTitles
This is an array of length numColumns of strings displayed at the top of each column. The data is
allocated and maintained by the client.
doubleClickCallback
All routines in this list will be called whenever the user double clicks on a row in the list.
entryData
This resource is the data associated with each row in the list. The data is an array of Xm18RowInfo
structures of length numRows allocated by the client. The data is allocated and maintained by the client.
The Xm18RowInfo structure is defined below.
findLabel
The label to be shown on the find button.
firstColumn
This resource allows the client to adjust the current view of the list data to have a new top left column
location. When setting this resource, firstRow should also be updated.
firstColumnPixmaps
This resource specifies that the pixmap stored in the row info structure should be used instead of
Xm18RowInfo values[0]. If pixmaps are present, the rows may be dragged by pressing on the pixmap with
pointer button three. If this resource is True, then values[0] is never referenced. If False, then the
Xm18RowInfo data pixmap is never referenced.
firstRow
This resource allows the client to adjust the current view of the list data to have a new top left row
location. When setting this resource, firstColumn should also be updated.
fontList
This is an OSF/Motif style font list. The first font in this list will be used to display all text in the
Extended List widget. The Extended List widget currently supports only one font.
height
This is the overall height value assigned to the Extended List widget. Modifying this resource will
affect scrollbar size and location.
numColumns
numRows
These resources specify the number of columns and rows the widget expects to display. These resources are
used as the maximum indices for many of the other resources in this widget. Care should be taken when
modifying these resources to ensure that the other values have also been modified.
selectedColumn
This is the index of the currently selected column. This also the column by which the list is being
sorted.
selectionPolicy
Defines the interpretation of the select action. This resource can have the values XmSINGLE_SELECT or
XmEXTENDED_SELECT. Other values result in undefined behavior.
showFind
This boolean manages and unmanages the find button
singleSelectionCallback
All routines in this list will be called whenever the user clicks on a line in the list. A pointer to
the Xm18RowInfo structure corresponding to the line selected is passed as call_data. If in extended
select mode the value of call_data is undefined.
sortFunctions
This is an array of functions, one for each column, called to determine the ordering of the rows in the
column, similar to qsort.
title
This is the title that is displayed at the top of the Extended List widget. If this value is NULL, the
title area will not be shown.
width
This is the overall width value assigned to the Extended List widget. Modifying this resource will affect
scrollbar size and location.
Specifying Children Resources
The Extended List widget is composed of many simple widgets. In order to achieve full functionality of
the Toolkit, it is sometimes desirable to set attribute values directly on those widgets. The widget ids
of the sub-widgets can be obtained by using the XtNameToWidget() function provided by the Xt Intrinsics.
XmExt18List <named by application>
XmLabel title
XmScrollbar vertBar
XmScrollBar horizBar
XmFrame frame
XmPushButton find
XmText findText
Using the Resource Database
The Extended List widget is actually a collection of pieces. It provides the geometry layout for the
collection as well as tying together the pieces to form a consistent package. Many of the resources that
are documented as being part of the Extended List widget are really part of the internal list sub-
component. The Extended List widget will pass these values through to the proper child when they are set
at time of creation or with XtSetValues or XtGetValues. However, when setting a resource via the resource
database you must use either the name of the child or the general specification (*) rather than the
specific one (.).
The Xm18RowInfo Structure
The Xm18RowInfo structure is used to contain the entryData associated with each Row in the Extended List.
typedef struct _Xm18RowInfo{
/*
* Used by the IList widget
*/
String * values;/* The array of column strings */
Pixmap pixmap;/* mini-icon pixmaps. */
Boolean selected;/* row selected. */
/*
* Provided for the convenience of the application programmer
*/
short * sort_id;
XtPointer data;
/*
* Private to the Extended List widget (do not modify these)
*/
short pix_width;/* of the pixmap. */
short pix_height;/* of the pixmap. */
short pix_depth;/* of the pixmap. */
Boolean old_sel_state;
} Xm18RowInfo;
values This is an array of strings of length numColumns which represents the strings displayed in
each column of this row. The data is allocated and maintained by the client. If
firstColumnPixmaps is True, then value[0] is never referenced.
pixmap This is the pixmap displayed to the left of this row. If firstColumnPixmaps is True then
this value is never referenced and mayn remain unset. If no pixmap is desired for this
row, even though firstColumnPixmaps is True, set the value of pixmap to None. Color
pixmaps may be used.
sort_id This is provided for the convenience of the client and is expected to be used as a sort
index for this row. One value should be specified for each column of the row. See
"sortFunctions" below for details.
data This is provided for the convenience of the client and may be used for any purpose. It is
intended to be used as an identifier for the object pointed to by this row
selected This value is True if this row is selected; may be set by the application.
Neither sort_id nor data are used by the Extended List widget; they exist solely for the convenience of
the programmer.
Translations and Actions
The following are the default translation bindings used by the icon button:
~Ctrl ~Shift <Btn1Down>: ButtonDown()
Ctrl ~Shift <Btn1Down>: ButtonDown(Toggle)
~Ctrl Shift <Btn1Down>: ButtonDown(Extend)
Button1 <Motion>: Motion()
<Btn1Up>: ButtonUpOrLeave()
The following actions are supported by the icon button:
ButtonDown(type)
Processes a button press action that may begin with either a select or a double click. The type argument
can be either Toggle or Extend. These values determine which mode of an extended select will be initiated
on this button event. Consult the OSF/Motif Style Guide for details.
Motion()
Processes motion events to allow the selection region to be modified when in extended selection mode. It
is assumed that this action is called between a ButtonDown() and ButtonUpOrLeave() action.
ButtonUpOrLeave()
Cleans up after ButtonDown() and Motion().
Callback Routines
All procedures on the Extended List's singleSelectionCallback and doubleClickCallback lists will have a
pointer to a Xm18RowInfo structure passed to them in the call_data field. This structure is defined
above.
Note: if a single SelectionCallback is registered on an extended list in extended_se- lect_mode, the
value of call_data is undefined.
void (callback)(Widget w, XtPointer client_data, XtPointer call_data)
w the Extended List widget
client_data the client data specified by the application
call_data a pointer to an Xm18RowInfo structure corrsponding the the row selected
Sort Function
typedef int (Xm18SortFunction) (short column, Xm18RowInfo * row1, Xm18RowInfo * row2);
column the column currently being sorted
row1, row2 the two rows being compared. The return value must be an integer less than, equal to, or
greater than 0, depending on whether the first argument is less than, equal to, or greater
than the second.
Convenience Routines
XmExt18ListGetSelectedRows
Xm18RowInfo ** XmExt18ListGetSelectedRows (Widget w)
w extended list widget
Use the XmExt18ListGetSelectedRows function to find the rows that currently are selected in an extended
list. The Xm18RowInfo ** returned by this function contains a NULL terminated array of Xm18RowInfo
pointers. The calling routine is responsible for freeing the returned pointer with XtFree(). The function
will return NULL if no elements are selected.
XmCreateExtended18List
Widget XmCreateExtended18List(Widget parent, String name, ArgList args, Cardinal
num_args)
parent parent of the extended list widget to be created
name name of the extended list widget to be created
args arguments to pass to XtCreateWidget for the extended list
num_args number of arguments passed
This convenience routine simply takes the passed parameters and calls XtCreateWidget, returning the
widget created.
XmExt18ListUnselectAllItems
void XmExt18ListUnselectAllItems( Widget w )
w the extended list widget to be modified
Unselects all rows of the passed extended list widget and returns nothing.
XmExt18ListUnselectItem
void XmExt18ListUnselectItem(Widget w, Xm18RowInfo *row_info)
w extended list widget
row_info pointer to the row which is to be unselected.
Unselects the row designated by row_info of the passed extended list widget w
COPYRIGHT
Copyright (c) 1992 by Integrated Computer Solutions, Inc.
XxExt18LIst(3)