NAME

BLT Table - geometry manager

SYNOPSIS

   use Tk::BLT::Table;

   $table = $frame->Table(-relief => 'ridge');
   $table->configure(-border => 5);
   $entry = $table->Entry;
   $table->put(0, 0, $entry);
   $table->Create(0, 1, 'Button', -text => "Button 1", -command => \&foo);

DESCRIPTION

 The blt_table command is a geometry manager for Tk.  It arranges
windows tabularly.  The table consists of individual rows and columns
whose spacing define its layout. Windows, called slaves, are
positioned in the table by specifying the row and column.  Only one
slave can be specified at a single position in the table.  But slaves
may span multiple rows and columns.

 By default, blt_table tries to arrange all its slaves in the minimum
space required. It determines this by querying each slave window for
its requested size.  The maximum requested height all slaves spanning
a particular row is the row's normal size.  Similarly, the maximum
requested width of all slaves spanning a particular column is the
column's normal size.  This, in turn, specifies the table's size,
which is the sum of the normal sizes of the rows and columns.  The
number of rows and columns a table contains is determined by the
indices specified.

Creating a table

 Tables are created by invoking the blt_table command.

       $table = $frame->Table(%options);

$frame is the pathname of a window which must already exist. Blt_table will arrange its slave windows inside of $table. Slave windows are added by designating the slave window's pathname and table position.

 The following arguments are available for the blt_table (all frame
arguments are also available) :

-height

Specifies a desired window height that the table widget should request from its geometry manager.

-width

Specifies a desired window width that the table widget should request from its geometry manager.

-row

the rows of the table specified in argument will have the same heigth than the rows of the table.

-col

the columns of the table specified in argument will have the same width than the columns of the table.

-xscrollincrement

-yscrollincrement

-xscrollcommand

-yscrollcommand

Creating a cell

  The 2 possibilities are :

     ($cell) = $table->Create($row, $column, 'name_of_Widget', %options);

  or :

     $widget = $table->What_you_want;

     $table->put($row, $column, $widget);

Cell configuration

     $table->Cell('configure', [$row, $column], %options);
     $table->Cell('configure', $widget, %options);

 Possible options are :

-anchor

Specifies how the slave window will be arranged if there is extra space in the span surrounding the window. may have any of the forms accepted by Tk_GetAnchor. For example, if is center then the window is centered in the rows and columns it spans; if is w then the window will be drawn such it touches the leftmost edge of the span. This option defaults to center.

-columnspan

Specifies the number of columns spanned by the slave. The default span is 1.

-fill

Indicates if the slave should be expanded to occupy any extra space in the span. must be one of the following: none, x, y, both. If is x, the width slave window is expanded. If is y, the height is expanded. The default is none.

-ipadx

Specifies an extra padding in addition to the width requested by the slave window. can be any value accepted by Tk_GetPixels. The default is 0.

-ipady

Specifies an extra padding in addition to the height requested by the slave window. can be any value accepted by Tk_GetPixels. The default is 0.

-padx

Specifies an extra padding to the width of the span occupying the slave window. can be any value accepted by Tk_GetPixels. The default is 0.

-pady

Specifies an extra padding to the height of the span occupying the slave window. can be any value accepted by Tk_GetPixels. The default is 0.

-reqheight

Specifies limits for the requested height of the slave window. These limits also constrain the amount of internal padding given to the slave. is a list of bounding values. See the section BOUNDING LIST FORMAT for a description of this list. By default there are no constraints.

-reqwidth

Specifies the limits of the width which a slave may request. These limits also affect the amount of internal padding given to the slave. is a list of bounding values. See the section BOUNDING LIST FORMAT for a description of this list. By default there are no constraints.

-rowspan

Specifies the number of rows spanned by the slave window. The default span is 1.

Columns and rows configuration

       $table->Row('configure', $row, %options);
       $table->Columns('configure', $columns, %options);

Valid options are :

-padx

Specifies an extra padding to the normal width of the column. can be any value accepted by Tk_GetPixels. The default padding is 0.

-resize

Indicates that the column can expand or shrink from its normal width when the table is resized. must be one of the following: none, expand, shrink, or both. If is expand the width of the column is expanded if there is extra space in the master window. If is shrink its width may be reduced beyond its normal width if there is not enough space in the master. The default is none.

-width

Specifies the limits within which the width of the column may expand or shrink. is a list of bounding values. See the section BOUNDING LIST FORMAT for a description of this list. By default there are no constraints.

Other commands

Row and Column

size :

  $table->Row('sizes', $row);
  $table->Column('sizes', $column);


 Returns the sizes of the given column (row) in the table.

forget :

   $table->Cell('forget', [$row, $column]);
   $table->Cell('forget', $widget);
   $table->Row('forget', $row);
   $table->Column('forget', $column);

Requests that cell (row, column) no longer have its geometry managed. The window will be unmapped so that it no longer appears on the screen. If slave is not currently managed by any table, an error message is returned, otherwise the empty string.

configure

   $table->Cell('configure');
   $table->Row('configure');
   $table->Column('configure');

Table

$table->get($row, $column);

return the slave in the cell ($row, $column).

$table->under($x, $y);

return the slave located at $x, $y

$table->dimension;

return the number of rows and columns of the table.

$table->tablex($x);

Given a screen x-coordinate $x this command returns the table x-coordinate that is displayed at that location.

$table->tabley($y);

Given a screen y-coordinate $y this command returns the table y-coordinate that is displayed at that location.

$table->layout

 Forces layout of the table geometry manager.  This is useful to get the
geometry manager to calculate the normal width and height of each row and
column.

Bounding list format

Constraints for various options (-reqheight, -reqwidth, -height, and -width) are specified by supplying a bounding list of values. Each value must be in a form accepted by Tk_GetPixels. The interpretation of this list is based upon the number of values it contains:

[]

empty list. No bounding is performed.

[ $x ]

Set the size of the window or partition at $x. The size of the partition or window cannot grow or shrink.

[ $min, $max ]

Bound the size of the window or partition between $min and $max.

[ $min, $max, $nom ]

Bound the size of the window or partition between $min and $max. In addition, set the normal size to $nom.

The maximum bound max can also be specified as "Inf" to indicate a unlimited maximum bound. This can be useful when you wish only to set the minimum or nominal size of a window or partition.

Example

    #!/usr/local/bin/perl
    BEGIN { unshift (@INC,qw(./blib .)) }
    use Tk;
    use Tk::BLT::Table;

    
    %attribx = (-fill => 'x', -border => 1, -relief => 'sunken');
    
    $top = new MainWindow;
    $table = Table $top -relief => 'ridge';
    configure $table -border => 5;
    

    $entry = Entry $table;
    put $table 0, 0, $entry;
    Create $table 
        0, 1, 'Button', -text => "Button 1", -command => \&foo,
        0, 2, 'Entry',
        1, 2, 'Button', -text => "Button 3",
        2, 0, 'Entry',
        2, 1, 'Button', -text => "Button 5",
        2, 2, 'Entry';
    

    Cell $table 'configure',[1, 2], -anchor => "se";
    # $table->Row('forget', 0);
    # $table->Column('forget', 1);
    # $table->Column('configure', 1);
    

    ($table1) = Create $table 
        1, 0, 'Table', -anchor => 'nw',-border => 5, -relief => 'raised';
    Create $table1
        0, 0, 'Button', -text => "But 1", -columnspan => 2, -fill => 'both',
        0, 2, 'Button', -text => "But 2", -rspan => 2, -fill => 'both',
        1, 0, 'Button', -text => "But 4", -rspan => 2, -fill => 'both',
        2, 1, 'Button', -text => "But 3", -cspan => 2, -fill => 'both',
        1, 1, 'Button', -text => "But 5", -fill => 'both';
    

    ($table0) = Create $table 
        1, 1, 'Table', -border => 10, -relief => 'sunken', -fill => 'both';
    

    ($tablet) = Create $table0 0, 1, 'Table',-fill => 'x';
    Create $tablet 
        0, 0, 'Label', -text => '1', %attribx,
        0, 1, 'Label', -text => '2', %attribx;
    

    ($tables) = Create $table0 2, 1, 'Table',-fill => 'x';
    Create $tables 
        0, 0, 'Label', -text => '4', -fill => 'x', -border => 1, -relief => 'sunken',
        0, 1, 'Label', -text => '3', -fill => 'x', -border => 1, -relief => 'sunken';
    

    ($table3, $scrollv1, $scrollv2) = Create $table0 
        1, 1, 'Table', -height => 200,
        1, 0, 'Scrollbar', -orient => 'vertical', -fill => 'y',
        1, 2, 'Scrollbar', -orient => 'vertical', -fill => 'y';
    configure $scrollv1 -command => ['yview', $table3];
    configure $scrollv2 -command => ['yview', $table3];
    configure $table3 
        -yscrollcommand => sub { $scrollv1->set(@_); $scrollv2->set(@_); },
        -col => [$tablet, $tables];
    

    Create $table3 
        0, 0, 'Text', -width => 6, -height => 8,
        5, 1, 'Button', -text => "Button 3", -command => sub {$table3->under(50, 50);},
        1, 0, 'Button', -text => "Button 4",
        1, 1, 'Entry',
        2, 0, 'Entry',
        2, 1, 'Button', -text => "Button 5",
        3, 0, 'Button', -text => "Button 6",
        3, 1, 'Entry',
        4, 0, 'Entry',
        4, 1, 'Button', -text => "Button 7",
        5, 0, 'Button', -text => "Button 8";
    

    ($table4) = Create $table3 0, 1, 'Table', -border => 2, -relief => 'groove';
    Create $table4 
        1, 0, 'Button', -text => "Button 4",
        1, 1, 'Entry',
        2, 0, 'Entry',
        2, 1, 'Button', -text => "Button 5",
        3, 0, 'Button', -text => "Button 6",
        3, 1, 'Entry',
        4, 0, 'Entry';
    

    $table->pack(-fill => 'both', -expand => 1);
    # print $table->tablex(20)," ",$table->tabley(20),"\n";
    MainLoop;
    

    sub foo {
        @dim =  $table->dimension;
        $, = ' ';
        for($i=0; $i<$dim[0];$i++) {
        print "$i : ",$table->Row('size', $i)," ",
        $table->Column('size',$i),"\n";
        }
    }

cpanm Tk::BLT::Table

perl -MCPAN -e shell
install Tk::BLT::Table