NAME¶

table - Create and manipulate tables

SYNOPSIS¶

table pathName ?options?

STANDARD OPTIONS¶

-anchor	-background	-cursor
-exportselection	-font	-foreground
-highlightbackground	-highlightcolor	-highlightthickness
-insertbackground	-insertborderwidth	-insertofftime
-insertontime	-insertwidth	-invertselected
-relief	-takefocus	-xscrollcommand
-yscrollcommand

See the options manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS¶

[-autoclear autoClear] A boolean value which specifies whether the first keypress in a cell will delete whatever text was previously there. Defaults to 0. [-bordercursor borderCursor] Specifies the name of the cursor to show when over borders, a visual indication that interactive resizing is allowed (it is thus affect by the value of -resizeborders). Defaults to crosshair. [-borderwidth or -bd borderWidth] Specifies a non-negative pixel value or list of values indicating the width of the 3-D border to draw on interior table cells (if such a border is being drawn; the relief option typically determines this). If one value is specified, a rectangle of this width will be drawn. If two values are specified, then only the left and right edges of the cell will have borders. If four values are specified, then the values correspond to the {left right top bottom} edges. This can be overridden by the a tag's borderwidth option. It can also be affected by the defined -drawmode for the table. Each value in the list must have one of the forms acceptable to Tk_GetPixels. [-browsecommand or -browsecmd browseCommand] Specifies a command which will be evaluated anytime the active cell changes. It uses the %-substition model described in COMMAND SUBSTITUTION below. Any changes to the active cell while the command is running are ignored to prevent recursion. [-cache cache] A boolean value that specifies whether an internal cache of the table contents should be kept. This greatly enhances speed performance when used with -command but uses extra memory. Can maintain state when both -command and -variable are empty. The cache is automatically flushed whenever the value of -cache or -variable changes, otherwise you have to explicitly call clear on it. Defaults to off. [-colorigin colOrigin] Specifies what column index to interpret as the leftmost column in the table. This value is used for user indices in the table. Defaults to 0. [-cols cols] Number of cols in the table. Defaults to 10. [-colseparator colSeparator] Specifies a separator character that will be interpreted as the column separator when cutting or pasting data in a table. By default, columns are separated as elements of a tcl list. [-colstretchmode colStretchMode] Specifies one of the following stretch modes for columns to fill extra allocated window space: [-coltagcommand colTagCommand] Provides the name of a procedure that will be evaluated by the widget to determine the tag to be used for a given column. When displaying a cell, the table widget will first check to see if a tag has been defined using the tag col widget method. If no tag is found, it will evaluate the named procedure passing the column number in question as the sole argument. The procedure is expected to return the name of a tag to use, or a null string. Errors occurring during the evaluation of the procedure, or the return of an invalid tag name are silently ignored. [-colwidth colWidth] Default column width, interpreted as characters in the default font when the number is positive, or pixels if it is negative. Defaults to 10. [-command command] Specified a command to use as a procedural interface to cell values. If -usecommand is true, this command will be used instead of any reference to the -variable array. When retrieving cell values, the return value of the command is used as the value for the cell. It uses the %-substition model described in COMMAND SUBSTITUTION below. [-drawmode drawMode] Sets the table drawing mode to one of the following options: [-ellipsis ellipsis] This specifies a string to display at the end of a line that would be clipped by its cell, like ``...''. An ellipsis will be displayed only on non-wrapping, non-multiline cells that would be clipped. The ellipsis will display on the left for east anchored cells, otherwise it displays on the right. Defaults to "" (no ellipsis). [-flashmode flashMode] A boolean value which specifies whether cells should flash when their value changes. The table tag flash will be applied to these cells for the duration specified by -flashtime. Defaults to 0. [-flashtime flashTime] The amount of time, in 1/4 second increments, for which a cell should flash when its value has changed. -flashmode must be on. Defaults to 2. [-height height] Specifies the desired height for the window, in rows. If zero or less, then the desired height for the window is made just large enough to hold all the rows in the table. The height can be further limited by -maxheight. [-invertselected invertSelected] Specifies whether the foreground and background of an item should simply have their values swapped instead of merging the sel tag options when the cell is selected. Defaults to 0 (merge sel tag). [-ipadx ipadX] A pixel value specifying the internal offset X padding for text in a cell. This value does not grow the size of the cell, it just causes the text to be drawn further from the cell border. It only affects one side (depending on anchor). Defaults to 0. See -padx for an alternate padding style. [-ipady ipadY] A pixel value specifying the internal offset Y padding for text in a cell. This value does not grow the size of the cell, it just causes the text to be drawn further from the cell border. It only affects one side (depending on anchor). Defaults to 0. See -pady for an alternate padding style. [-justify justify] How to justify multi-line text in a cell. It must be one of left, right, or center. Defaults to left. [-maxheight maxHeight] The max height in pixels that the window will request. Defaults to 600. [-maxwidth maxWidth] The max width in pixels that the window will request. Defaults to 800. [-multiline multiline] Specifies the default setting for the multiline tag option. Defaults to 1. [-padx padX] A pixel value specifying the offset X padding for a cell. This value causes the default size of the cell to increase by two times the value (one for each side), unless a specific pixel size is chosen for the cell with the width command. This will force an empty area on the left and right of each cell edge. This padding affects all types of data in the cell. Defaults to 0. See -ipadx for an alternate padding style. [-pady padY] A pixel value specifying the offset Y padding for a cell. This value causes the default size of the cell to increase by two times the value (one for each side), unless a specific pixel size is chosen for the cell with the height command. This will force an empty area on the top and bottom of each cell edge. This padding affects all types of data in the cell. Defaults to 0. See -ipadx for an alternate padding style. [-resizeborders resizeBorders] Specifies what kind of interactive border resizing to allow, must be one of row, col, both (default) or none. [-rowheight rowHeight] Default row height, interpreted as lines in the default font when the number is positive, or pixels if it is negative. Defaults to 1. [-roworigin rowOrigin] Specifies what row index to interpret as the topmost row in the table. This value is used for user indices in the table. Defaults to 0. [-rows rows] Number of rows in the table. Defaults to 10. [-rowseparator rowSeparator] Specifies a separator character that will be interpreted as the row separator when cutting or pasting data in a table. By default, rows are separated as tcl lists. [-rowstretchmode rowStretchMode] Specifies the stretch modes for rows to fill extra allocated window space. See -colstretchmode for valid options. [-rowtagcommand rowTagCommand] Provides the name of a procedure that can evaluated by the widget to determine the tag to be used for a given row. The procedure must be defined by the user to accept a single argument (the row number), and return a tag name or null string. This operates in a similar manner as -coltagcommand, except that it applies to row tags. [-selectioncommand or -selcmd selectionCommand] Specifies a command to evaluate when the selection is retrieved from a table via the selection mechanism (ie: evaluating `` selection get''). The return value from this command will become the string passed on by the selection mechanism. It uses the %-substition model described in COMMAND SUBSTITUTION below. If an error occurs, a Tcl background error is generated and nothing is returned. [-selectmode selectMode] Specifies one of several styles for manipulating the selection. The value of the option may be arbitrary, but the default bindings expect it to be either single, browse, multiple, or extended; the default value is browse. These styles are like those for the Tk listbox, except expanded for 2 dimensions. [-selecttitle selectTitles] Specifies whether title cells should be allowed in the selection. Defaults to 0 (disallowed). [-selecttype selectType] Specifies one of several types of selection for the table. The value of the option may be one of row, col, cell, or both (meaning row && col); the default value is cell. These types define whether an entire row/col is affected when a cell's selection is changed (set or clear). [-sparsearray sparseArray] A boolean value that specifies whether an associated Tcl array should be kept as a sparse array (1, the default) or as a full array (0). If true, then cell values that are empty will be deleted from the array (taking less memory). If false, then all values in the array will be maintained. [-state state] Specifies one of two states for the entry: normal or disabled. If the table is disabled then the value may not be changed using widget commands and no insertion cursor will be displayed, even if the input focus is in the widget. Also, all insert or delete methods will be ignored. Defaults to normal. [-titlecols titleCols] Number of columns to use as a title area. Defaults to 0. [-titlerows titleRows] Number of rows to use as a title area. Defaults to 0. [-usecommand useCommand] A boolean value which specifies whether to use the command option. This value sets itself to zero if command is used and returns an error. Defaults to 1 (will use command if specified). [-validate validate] A boolean specifying whether validation should occur for the active buffer. Defaults to 0. [-validatecommand or -vcmd validateCommand] Specifies a command to execute when the active cell is edited. This command is expected to return a Tcl boolean. If it returns true, then it is assumed the new value is OK, otherwise the new value is rejected (the edition will not take place). Errors in this command are handled in the background. It uses the %-substition model described in COMMAND SUBSTITUTION below. [-variable variable] Global Tcl array variable to attach to the table's C array. It will be created if it doesn't already exist or is a simple variable. Keys used by the table in the array are of the form row,col for cells and the special key active which contains the value of the active cell buffer. The Tcl array is managed as a sparse array (the table does not require that all valid indices have values). No stored value for an index is equivalent to the empty string, and clearing a cell will remove that index from the Tcl array, unless the -sparsearray options is set to 0. [-width width] Specifies the desired width for the window, in columns. If zero or less, then the desired width for the window is made just large enough to hold all the columns in the table. The width can be further limited by -maxwidth. [-wrap wrap] Specifies the default wrap value for tags. Defaults to 0.

DESCRIPTION¶

The table command creates a 2-dimensional grid of cells. The table can use a Tcl array variable or Tcl command for data storage and retrieval, as well as optionally cache data in memory for speed. One of these data sources must be configured before any data is retained by the table. The widget has an active cell, the contents of which can be edited (when the state is normal). The widget supports a default style for the cells and also multiple tags, which can be used to change the style of a row, column or cell (see TAGS for details). A cell flash can be set up so that changed cells will change color for a specified amount of time ("blink"). Cells can have embedded images or windows, as described in TAGS and "EMBEDDED WINDOWS" respectively. One or more cells may be selected as described below. If a table is exporting its selection (see -exportselection option), then it will observe the standard X11 protocols for handling the selection. See THE SELECTION for details. It is not necessary for all the cells to be displayed in the table window at once; commands described below may be used to change the view in the window. Tables allow scrolling in both directions using the standard -xscrollcommand and -yscrollcommand options. They also support scanning, as described below. In order to obtain good performance, the table widget supports multiple drawing modes, two of which are fully Tk compatible.

INITIALIZATION¶

When the table command is loaded into an interpreter, a built-in Tcl command, tkTableInit, is evaluated. This will search for the appropriate table binding init file to load. The directories searched are those in $tcl_pkgPath, both with Tktable(version) appended and without, $tk_library and [pwd] (the current directory). You can also define an $env(TK_TABLE_LIBRARY) to head this search list. By default, the file searched for is called tkTable.tcl, but this can be overridden by setting $env(TK_TABLE_LIBRARY_FILE). This entire init script can be overridden by providing your own tkTableInit procedure before the library is loaded. Otherwise, the aforementioned env(TK_TABLE_LIBRARY) variable will be set with the directory in which $env(TK_TABLE_LIBRARY_FILE) was found.

INDICES¶

Many of the widget commands for tables take one or more indices as arguments. An index specifies a particular cell of the table, in any of the following ways:

number,number

Specifies the cell as a numerical index of row,col which corresponds to the index of the associated Tcl array, where -roworigin,-colorigin corresponds to the first cell in the table (0,0 by default). The values for row and column will be constrained to actual values in the table, which means a valid cell is always found.

active

Indicates the cell that has the location cursor. It is specified with the activate widget command.

anchor

Indicates the anchor point for the selection, which is set with the selection anchor widget command.

bottomright

Indicates the bottom-rightmost cell visible in the table.

end

Indicates the bottom right cell of the table.

origin

Indicates the top-leftmost editable cell of the table, not necessarily in the display. This takes into account the user specified origin and title area.

topleft

Indicates the top-leftmost editable cell visible in the table (this excludes title cells).

@x,y

Indicates the cell that covers the point in the table window specified by x and y (in pixel coordinates). If no cell covers that point, then the closest cell to that point is used.

In the widget command descriptions below, arguments named index, first, and last always contain text indices in one of the above forms.

TAGS¶

A tag is a textual string that is associated with zero or more rows, columns or cells in a table. Tags may contain arbitrary characters, but it is probably best to avoid using names which look like indices to reduce coding confusion. A tag can apply to an entire row or column, or just a single cell. There are several permanent tags in each table that can be configured by the user and will determine the attributes for special cells: Tags control the way cells are displayed on the screen. Where appropriate, the default for displaying cells is determined by the options for the table widget. However, display options may be associated with individual tags using the `` pathName tag configure'' widget command. If a cell, row or column has been tagged, then the display options associated with the tag override the default display style. The following options are currently supported for tags: A priority order is defined among tags based on creation order (first created tag has highest default priority), and this order is used in implementing some of the tag-related functions described below. When a cell is displayed, its properties are determined by the tags which are assigned to it. The priority of a tag can be modified by the `` pathName tag lower'' and `` pathName tag raise'' widget commands. If a cell has several tags associated with it that define the same display options (eg - a title cell with specific row and cell tags), then the options of the highest priority tag are used. If a particular display option hasn't been specified for a particular tag, or if it is specified as an empty string, then that option will not be used; the next-highest-priority tag's option will be used instead. If no tag specifies a particular display option, then the default style for the widget will be used. Images are used for display purposes only. Editing in that cell will still be enabled and any querying of the cell will show the text value of the cell, regardless of the value of -showtext.

EMBEDDED WINDOWS¶

There may be any number of embedded windows in a table widget (one per cell), and any widget may be used as an embedded window (subject to the usual rules for geometry management, which require the table window to be the parent of the embedded window or a descendant of its parent). The embedded window's position on the screen will be updated as the table is modified or scrolled, and it will be mapped and unmapped as it moves into and out of the visible area of the table widget. Each embedded window occupies one cell's worth of space in the table widget, and it is referred to by the index of the cell in the table. Windows associated with the table widget are destroyed when the table widget is destroyed. Windows are used for display purposes only. A value still exists for that cell, but will not be shown unless the window is deleted in some way. If the window is destroyed or lost by the table widget to another geometry manager, then any data associated with it is lost (the cell it occupied will no longer appear in window names). When an embedded window is added to a table widget with the window configure widget command, several configuration options may be associated with it. These options may be modified with later calls to the window configure widget command. The following options are currently supported:

THE SELECTION¶

Table selections are available as type STRING. By default, the value of the selection will be the values of the selected cells in nested Tcl list form where each row is a list and each column is an element of a row list. You can change the way this value is interpreted by setting the -rowseparator and -colseparator options. For example, default Excel format would be to set -rowseparator to '\n' and -colseparator to '\t'. Changing these values affects both how the table sends out the selection and reads in pasted data, ensuring that the table should always be able to cut and paste to itself. It is possible to change how pastes are handled by editing the table library procedure tk_tablePasteHandler. This might be necessary if -selectioncommand is set.

ROW/COL SPANNING¶

Individual cells can span multiple rows and/or columns. This is done via the spans command (see below for exact arguments). Cells in the title area that span are not permitted to span beyond the title area, and will be constrained accordingly. If the title area shrinks during a configure, sanity checking will occur to ensure the above. You may set spans on regular cells that extend beyond the defined row/col area. These spans will not be constrained, so that when the defined row/col area expands, the span will expand with it. When setting a span, checks are made as to whether the span would overlap an already spanning or hidden cell. This is an error and it not allowed. Spans can affect the overall speed of table drawing, although not significantly. If spans are not used, then there is no performance loss. Cells hidden by spanning cells still have valid data. This will be seen during cut and paste operations that involve hidden cells, or through direct access by a command like get or set. The drawing properties of spanning cells apply to only the visual area of the cell. For example, if a cell is center justified over 5 columns, then when viewing any portion of those columns, it will appear centered in the visible area. The non-visible column area will not be considered in the centering calculations.

COMMAND SUBSTITUTION¶

The various option based commands that the table supports all support the familiar Tk %-substitution model (see bind for more details). The following %-sequences are recognized and substituted by the table widget:

%c

For SelectionCommand, it is the maximum number of columns in any row in the selection. Otherwise it is the column of the triggered cell.

%C

A convenience substitution for %r,%c.

%i

For SelectionCommand, it is the total number of cells in the selection. For Command, it is 0 for a read (get) and 1 for a write (set). Otherwise it is the current cursor position in the cell.

%r

For SelectionCommand, it is the number of rows in the selection. Otherwise it is the row of the triggered cell.

%s

For ValidateCommand, it is the current value of the cell being validated. For SelectionCommand, it is the default value of the selection. For BrowseCommand, it is the index of the last active cell. For Command, it is empty for reads (get) and the current value of the cell for writes (set).

%S

For ValidateCommand, it is the potential new value of the cell being validated. For BrowseCommand, it is the index of the new active cell.

%W

The pathname to the window for which the command was generated.

WIDGET COMMAND¶

The table command creates a new Tcl command whose name is pathName. This command may be used to invoke various operations on the widget. It has the following general form: Option and the args determine the exact behavior of the command. The following commands are possible for table widgets:

pathName activate index

Sets the active cell to the one indicated by index.

pathName bbox first ?last?

It returns the bounding box for the specified cell (range) as a 4-tuple of x, y, width and height in pixels. It clips the box to the visible portion, if any, otherwise an empty string is returned.

pathName border option args

This command is a voodoo hack to implement border sizing for tables. This is normally called through bindings, with the following as valid options:

pathName cget option

Returns the current value of the configuration option given by option. Option may have any of the values accepted by the table command.

pathName clear option ?first? ?last?

This command is a convenience routine to clear certain state information managed by the table. first and last represent valid table indices. If neither are specified, then the command operates on the whole table. The following options are recognized:

pathName configure ?option? ?value option value ...?

Query or modify the configuration options of the widget. If no option is specified, returns a list describing all of the available options for pathName (see Tk_ConfigureInfo for information on the format of this list). If option is specified with no value, then the command returns a list describing the one named option (this list will be identical to the corresponding sublist of the value returned if no option is specified). If one or more option-value pairs are specified, then the command modifies the given widget option(s) to have the given value(s); in this case the command returns an empty string. Option may have any of the values accepted by the table command.

pathName curselection ?value?

With no arguments, it returns the sorted indices of the currently selected cells. Otherwise it sets all the selected cells to the given value. The set has no effect if there is no associated Tcl array or the state is disabled.

pathName curvalue ?value?

If no value is given, the value of the cell being edited (indexed by active) is returned, else it is set to the given value.

pathName delete option arg ?arg?

This command is used to delete various things in a table. It has several forms, depending on the option:

pathName get first ?last?

Returns the value of the cells specified by the table indices first and (optionally) last in a list.

pathName height ?row? ?value row value ...?

If no row is specified, returns a list describing all rows for which a height has been set. If row is specified with no value, it prints out the height of that row in characters (positive number) or pixels (negative number). If one or more row-value pairs are specified, then it sets each row to be that height in lines (positive number) or pixels (negative number). If value is default, then the row uses the default height, specified by -rowheight.

pathName hidden ?index? ?index ...?

When called without args, it returns all the hidden cells (those cells covered by a spanning cell). If one index is specified, it returns the spanning cell covering that index, if any. If multiple indices are specified, it returns 1 if all indices are hidden cells, 0 otherwise.

pathName icursor ?arg?

With no arguments, prints out the location of the insertion cursor in the active cell. With one argument, sets the cursor to that point in the string. 0 is before the first character, you can also use insert or end for the current insertion point or the end of the text. If there is no active cell, or the cell or table is disabled, this will return -1.

pathName index index ?row|col?

Returns the integer cell coordinate that corresponds to index in the form row,col. If row or col is specified, then only the row or column index is returned.

pathName insert option arg arg

This command is used to into various things into a table. It has several forms, depending on the option:

pathName reread

Rereads the old contents of the cell back into the editing buffer. Useful for a key binding when <Escape> is pressed to abort the edit (a default binding).

pathName scan option args

This command is used to implement scanning on tables. It has two forms, depending on option:

pathName see index

Adjust the view in the table so that the cell given by index is positioned as the cell one off from top left (excluding title rows and columns) if the cell is not currently visible on the screen. The actual cell may be different to keep the screen full.

pathName selection option arg

This command is used to adjust the selection within a table. It has several forms, depending on option:

pathName set ?row|col? index ?value? ?index value ...?

Sets the specified index to the associated value. Table validation will not be triggered via this method. If row or col precedes the list of index/value pairs, then the value is assumed to be a Tcl list whose values will be split and set into the subsequent columns (if row is specified) or rows (for col). For example, set row 2,3 {2,3 2,4 2,5} will set 3 cells, from 2,3 to 2,5. The setting of cells is silently bounded by the known table dimensions.

pathName spans ?index? ?rows,cols index rows,cols ...?

This command is used to manipulate row/col spans. When called with no arguments, all known spans are returned as a list of tuples of the form {index span}. When called with only the index, the span for that index only is returned, if any. Otherwise an even number of index rows,cols pairs are used to set spans. A span starts at the index and continues for the specified number of rows and cols. Negative spans are not supported. A span of 0,0 unsets any span on that cell. See EXAMPLES for more info.

pathName tag option ?arg arg ...?

This command is used to manipulate tags. The exact behavior of the command depends on the option argument that follows the tag argument. cget, cell, and row|col complain about unknown tag names. The following forms of the command are currently supported:

pathName validate index

Explicitly validates the specified index based on the current -validatecommand and returns 0 or 1 based on whether the cell was validated.

pathName width ?col? ?value col value ...?

If no col is specified, returns a list describing all cols for which a width has been set. If col is specified with no value, it prints out the width of that col in characters (positive number) or pixels (negative number). If one or more col-value pairs are specified, then it sets each col to be that width in characters (positive number) or pixels (negative number). If value is default, then the col uses the default width, specified by -colwidth.

pathName window option ?arg arg ...?

This command is used to manipulate embedded windows. The exact behavior of the command depends on the option argument that follows the window argument. The following forms of the command are currently supported:

pathName xview args

This command is used to query and change the horizontal position of the information in the widget's window. It can take any of the following forms:

pathName yview ?args?

This command is used to query and change the vertical position of the text in the widget's window. It can take any of the following forms:

DEFAULT BINDINGS¶

The initialization creates class bindings that give the following default behaviour:

[1]

Clicking Button-1 in a cell activates that cell. Clicking into an already active cell moves the insertion cursor to the character nearest the mouse.

[2]

Moving the mouse while Button-1 is pressed will stroke out a selection area. Exiting while Button-1 is pressed causing scanning to occur on the table along with selection.

[3]

Moving the mouse while Button-2 is pressed causes scanning to occur without any selection.

[4]

Home moves the table to have the origin in view.

[5]

End moves the table to have the end cell in view.

[6]

Control-Home moves the table to the origin and activates that cell.

[7]

Control-End moves the table to the end and activates that cell.

[8]

Shift-Control-Home extends the selection to the origin.

[9]

Shift-Control-End extends the selection to the end.

[10]

The left, right, up and down arrows move the active cell.

[11]

Shift-<arrow> extends the selection in that direction.

[12]

Control-leftarrow and Control-rightarrow move the insertion cursor within the cell.

[13]

Control-slash selects all the cells.

[14]

Control-backslash clears selection from all the cells.

[15]

Backspace deletes the character before the insertion cursor in the active cell.

[16]

Delete deletes the character after the insertion cursor in the active cell.

[17]

Escape rereads the value of the active cell from the specified data source, discarding any edits that have may been performed on the cell.

[18]

Control-a moves the insertion cursor to the beginning of the active cell.

[19]

Control-e moves the insertion cursor to the end of the active cell.

[20]

Control-minus and Control-equals decrease and increase the width of the column with the active cell in it.

[21]

Moving the mouse while Button-3 (the right button on Windows) is pressed while you are over a border will cause interactive resizing of that row and/or column to occur, based on the value of -resizeborders.

Some bindings may have slightly different behavior dependent on the -selectionmode of the widget. If the widget is disabled using the -state option, then its view can still be adjusted and cells can still be selected, but no insertion cursor will be displayed and no cell modifications will take place. The behavior of tables can be changed by defining new bindings for individual widgets or by redefining the class bindings. The default bindings are either compiled in or read from a file expected to correspond to: "[lindex $tcl_pkgPath 0]/Tktable<version>/tkTable.tcl".

PERFORMANCE ISSUES¶

The number of rows and columns or a table widget should not significantly affect the speed of redraw. Recalculation and redraw of table parameters and cells is restricted as much as possible. The display cell with the insert cursor is redrawn each time the cursor blinks, which causes a steady stream of graphics traffic. Set the -insertofftime option to 0 avoid this. The use of a -command with the table without a cache can cause significant slow-down, as the command is called once for each request of a cell value.

EXAMPLES¶

Set the topleft title area to be one spanning cell. This overestimates both row and column span by one, but the command does all the constraining for us. Force a table window refresh (useful for the slight chance that a bug in the table is not causing proper refresh):

KEYWORDS¶

table, widget, extension