Provided by: perl-tk_804.031-1build1_amd64 
NAME
Tk::TixGrid - Create and manipulate Tix Grid widgets
SYNOPSIS
$tixgrid = $parent->TixGrid?(options)?;
DESCRIPTION
This widget is intended as the basis of "spread sheet" like interfaces. The widget
displays its contents in a two dimensional "grid" of cells. Each cell may contain one Tix
display item, which may be in text, graphics or other formats. See Tk::DItem for more
information about Tix display items. Because these "items" need not be "windows" large
grids can be handled without consuming excessive display system resources.
Individual cells, or groups of cells, can be formatted with a wide range of attributes,
such as its color, relief and border. However because the widget is intended to handle
large grids the mechanisms to achieve these are lower level, and more callback oriented
than for other widgets. The assumption is that to avoid storing display details of a large
number of cells, the data will be re-computed as needed.
The port of Tix C code and some of the bindings to perl/Tk is done but still need further
work. In several places the intent of the Tix code is not yet understood. For example the
'edit' interface is clearly intended for spread-sheet like cell content editing in an
auxillary "entry" widget or similar, but how that should work is not yet clear.
The TixGrid method creates a new TixGrid window and returns a blessed reference of this
TixGrid widget. Additional options, described below, may be specified on the command line
or in the option database to configure aspects of the TixGrid widget.
STANDARD OPTIONS
-background -borderwidth -cursor -font -foreground -height
-highlightbackground -highlightcolor -highlightthickness -padx
-pady -relief -selectbackground -selectborderwidth
-selectforeground -state -takefocus -width -xscrollcommand
-yscrollcommand
See Tk::options for details of the standard options.
WIDGET-SPECIFIC OPTIONS
Name: browseCmd
Class: BrowseCmd
Switch: -browsecmd
If defined, gives a perl/Tk callback to be executed when the user browses a grid cell
(This is normally the case when the user clicks on an entry). When this callback is
called, it is passed with two additional parameters: x y, where (x,y) is the location
of the cell that has just been clicked.
Name: Command
Class: Command
Switch: -command
If defined, gives a perl/Tk callback to be executed when the user double-clicks a grid
cell. When this callback is called, it is passed with two additional parameters: x y,
where (x,y) is the location of the cell that has just been clicked.
Name: editDoneCmd
Class: EditDoneCmd
Switch: -editdonecmd
If defined, gives a perl/Tk callback to be executed when the user has edited grid
cell. When this callback is called, it is passed with two additional parameters: x y,
where (x,y) is the location of the cell that has just been edited.
Name: editNotifyCmd
Class: EditNotifyCmd
Switch: -editnotifycmd
If defined gives a perl/Tk callback to be executed when the user tries to edit a grid
cell. When this callback is called, it is passed with two additional parameters: x y,
where (x,y,) is the location of the cell. This callback should return a boolean value:
true indicates that the cell is editable and false otherwise.
Name: FloatingCols
Class: floatingCols
Switch: -floatingcols
Defines the number of extra columns beyond the existing grid that can be brought into
view by scrolling.
Name: FloatingRows
Class: floatingRows
Switch: -floatingrows
Defines the number of extra rows beyond the the existing grid that can be brought into
view by scrolling.
Name: formatCmd
Class: FormatCmd
Switch: -formatcmd
If defined, gives a perl/Tk callback to be executed when the grid cells need to be
displayed on the screen. Its primary purpose is to draw the background of the region
before the cells are rendered on top. This is normally achieved by calling formatGrid
or formatBorder (see below). However other uses can be made of this low-level
callback. For example it can be used to "lazily" populate the grid by calling the set
method only as cells come into view.
When this callback is called, it is passed with five additional parameters: type x1 y1
x2 y2.
x1 y1 x2 y2 gives the extent of the region that needs formatting.
type gives the logical type of the region in the grid. It may be one of the following.
x_margin
The horizontal margin.
y_margin
The vertical margin.
s_margin
The area in the top left corner where the horizontal and vertical margins are
joined.
main The main body i.e. all the cells that do not fall into the above three types.
Name: leftMargin
Class: LeftMargin
Switch: -leftmargin
Gives the width of vertical margin in cells (columns). A zero indicates that no
vertical margin exists. A positive value N indicates that first N columns are "labels"
and are always displayed and not scrolled.
Name: itemType
Class: ItemType
Switch: -itemtype
Default item type for cells.
Name: selectMode
Class: SelectMode
Switch: -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 single.
Name: selectUnit
Class: SelectUnit
Switch: -selectunit
Specifies the selection unit. Valid values are cell, column or row.
Name: sizeCmd
Class: SizeCmd
Switch: -sizecmd
Callback is called (with no extra arguments) when grid sizes are re-computed. For
example if window changes size, a different font is specified etc.
It is called just after scrollbars (if present) are updated.
Name: topMargin
Class: TopMargin
Switch: -topmargin
Gives the width of horizontal margin in cells (rows). A zero indicates that no
horizontal margin exists. A positive value N indicates that first N rows are "labels"
and are always displayed and not scrolled.
WIDGET METHODS
The TixGrid method creates a TixGrid widget and returns a blessed reference of this
TixGrid widget. This reference may be used to invoke various operations on the widget.
It has the following general form:
$tixgrid->method?(arg, arg, ...)?
args determine the exact behavior of the method.
This object supports the configure and cget methods described in Tk::options which can be
used to enquire and modify the options described above. The widget also inherits all the
methods provided by the generic Tk::Widget class.
The following additional methods are possible for TixGrid widgets:
$tixgrid->anchorGet(x, y)
$tixgrid->anchorSet(x, y)
$tixgrid->anchorClear
Manipulates the anchor cell of the TixGrid widget. The anchor cell is the end of the
selection that is fixed while the user is dragging out a selection with the mouse.
($bd,$col,$row) = $tixgrid->bdtype(x,y ?,xDelta,yDelta?)
Determines if the the screen (pixel) position x,y is in a border. This is useful for
changing the mouse cursor when the user points at a border - e.g. to indicate that the
border can be adjusted interactively.
If in a border returns a list of three elements. First element is 'xy', 'x' or 'y',
second two elements are integers. (Value of these are not understood, seem to
indicate which column and row of the border the screen position corresponds to?)
If not in a border returns an empty list.
$tixgrid->delete(dim, from?, to?)
$tixgrid->deleteColumn(from?, to?)
$tixgrid->deleteRow(from?, to?)
Dim may be row or column. If to is not given, deletes a single row (or column) at the
position from. If to is given, deletes the range of rows (or columns) from position
from through to.
$tixgrid->dragsite(option, x, y)
$tixgrid->dropsite(option, x, y)
Tcl/Tix has (or was going to have) Drag&Drop support. Meaning for perl/Tk is not
clear yet.
$tixgrid->editApply
If any cell is being edited, de-highlight the cell and applies the changes.
$tixgrid->editSet(x, y)
Highlights the cell at (x,y) for editing, if the -editnotify callback returns true for
this cell.
$tixgrid->entrycget(x, y, '-option')
$tixgrid->entryconfigure(x, y?, -option??=>value, -option=>value, ...?)
Provide a configue interface to cells in the grid. The -options depend on the item
type of the cell.
$tixgrid->formatBorder(x1,y1, x2,y2, options);
$tixgrid->formatGrid(x1,y1, x2,y2, options);
The formatBorder and formatBorder methods can only be called by the -formatcmd
callback of the tixGrid widget. They draw the background of the region described by
x1,y1, x2,y2 according the the supplied options. One call to -formatcmd callback can
make multiple calls to formatBorder and/or formatBorder for different sub-regions.
formatBorder draws the background using Tk relief style, formatGrid also draws grid
lines between the cells. It only makes sense to call one or the other for a
particular sub-region as one will over-write the other.
The options allowed are:
-background / -bg
-borderwidth / -bd
-filled
-relief
-selectbackground
-xoff
-xon
-yoff
-yon
The -xon/-xoff and -yon/-yoff options are obscure. If anyone can figure out how to do
something interesting given what pTk/tixGrFmt.c is doing with them please let Nick
know!.
$tixgrid->geometryinfo(?width, height?)
Returns list of four values - two sets of two floating point numbers. First set is
the scrollbar fractions for x direction, second set is scrollbar fractions for y
direction. If width and height are specified then fractions are based on as if window
size was of specified size (in pixels, but not allowing normal GetPixels units).
Otherwise fractions are based on current size of the window.
Usage obscure.
$tixgrid->index(xcoord, ycoord)
Retuns (x, y) of entry at position ($coordx, $coordy). Either coordinate may be 'max'
which is largest existing entry in that direction, 'end' which is one beyond largest
existing entry, or a number. (This is how you find out how big the grid is.)
$tixgrid->infoBbox(x,y)
Return the pixel bounding box of the cell at x,y.
$tixgrid->infoExists(x,y)
Returns true if there is an item in the cell at x,y. Throws an exception (dies) if
x,y is outside the grid - this may change (Nick doesn't like it).
$tixgrid->move(dim, from, to, offset)
$tixgrid->moveColumn(from, to, offset)
$tixgrid->moveRow(from, to, offset)
Dim may be row or column. Moves the range of rows (or columns) from position from
through to by the distance indicated by offset. For example, $tixgrid->moveRow(2, 4,
1) moves the rows 2,3,4 to rows 3,4,5.
$tixgrid->nearest(x, y)
Screen pos (pixels) to entry (nx,ny) translation.
$tixgrid->selectionAdjust(x1, y1 ?,x2, y2?)
$tixgrid->selectionClear(x1, y1 ?,x2, y2?)
$tixgrid->selectionIncludes(x1, y1 ?,x2, y2?)
$tixgrid->selectionSet(x1, y1 ?,x2, y2?)
$tixgrid->selectionToggle(x1, y1 ?,x2, y2?)
Selection support methods - probably buggy.
x1 (y1) has not to be greater than x2 (y2), but only x2 and y2 can be 'max'.
BUG: selectionIncludes: has no visible effect (as in Tix). Eh???
BUG: selectionClear: only works for 0, 0, max, max (as in Tix). Eh???
When x2, y2 are not given they default to x1, y1, respectively.
$tixgrid->set(x, y?, -itemtype=>type??, -option=>value, ...?)
Creates a new display item at the cell at (x,y). The optional -itemtype parameter
gives the type of the display item. An additional list of option-value pairs specify
options of the display item. If a display item already exists at this cell, the old
item will be deleted automatically.
$tixgrid->size(dim, index?, -option??=>value, ...?)
$tixgrid->sizeColumn(index?, -option??=>value, ...?)
$tixgrid->sizeRow(index?, -option??=>value, ...?)
Queries or sets the size of the row or column given by dim and index. Dim may be row
or column. Index may be any non-negative integer that gives the position of a given
row (or column). Index can also be the string default; in this case, this method
queries or sets the default size of all rows (or columns). When no option-value pair
is given, this method returns a list containing the current size setting of the given
row (or column). When option-value pairs are given, the corresponding options of the
size setting of the given row are changed. -option may be one of the following:
-pad0 => pixels
Specifies the paddings to the left of a column or the top of a row.
-pad1 => pixels
Specifies the paddings to the right of a column or the bottom of a row.
-size => val
Specifies the width of a column or the height of a row. Val may be: auto --
the width of the column is set the widest cell in the column; a valid Tk
screen distance unit (see Tk_GetPixels); or a real number following by the
word chars (e.g. 3.4chars) that sets the width of the column to the given
number of characters.
$tixgrid->sort(dimension, start, end, ?args ...?)
?docu here? (not supported on Win* OSs up to now)
$tixgrid->unset(x, y)
Clears the cell at (x,y) by removing its display item.
$tixgrid->xview
Normal horizontal scrollbar method.
$tixgrid->yview
Normal vertical scrollbar method.
BINDINGS
To be done - only most obvious basic bindings work. The Tcl/Tix code was coded as a "state
machine" which is not easy to follow.
SEE ALSO
Tk::DItem Tk::callbacks Tk::FloatEntry
BUGS
Tcl/Tix was/is not finished and both C code and bindings of TixGrid have some bugs.
KEYWORDS
tix, tixgrid, table, display item, spreadsheet