Provided by: libmotif-dev_2.3.4-10_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)