NAME

Tk::TableMatrix::SpreadsheetHideRows - Table Display with selectable hide/un-hide of rows

SYNOPSIS

  use Tk;
  use Tk::TableMatrix::SpreadsheetHideRows

  my $t = $top->Scrolled('SpreadsheetHideRows', 
    -selectorCol => 3,
    -expandData => $hashRef,
    -rows => 21, -cols => 11, 
    -width => 6, -height => 6,
    -titlerows => 1, -titlecols => 1,
    -variable => $arrayVar,
    -selectmode => 'extended',
    -resizeborders => 'both',
    -bg => 'white',
  );

DESCRIPTION

Tk::TableMatrix::SpreadsheetHideRows is a Tk::TableMatrix::Spreadsheet-derived widget that implements a Spreadsheet-like display of tabular information, where some of the rows in the table can be expanded/hidden by clicking a '+/-' selector in the row. This can be used to display top-level information in a table, while allowing the user to expand certain table rows to view detail-level information.

See demos/SpreadsheetHideRows in the source distribution for a simple example of this widget

In addition the standard Tk::TableMatrix widget options. The following options are implemented:

-selectorCol

Column number where the +/- selector will appear. Clicking on the +/- selector will expand/hide the detail information in the table for a particular row.

-selectorColWidth

Width of the column used to display the +/- selector. Defaults to 2

-expandData

Hash ref defining the detail-level data displayed when a row is expanded (by clicking the +/- selector). This hash ref should have the following structure:

  $expandData = {  
        row1 => {  tag  => 'detailDataTag',
                   data => $detailData,
                   spans=> $spanData,
                   expandData => $subLevelData
                },
        row2 => { 
           .
           .
  }
  
  Where: 
    row1, row2, ...         Row numbers that will be expandable.
    tag => 'detailDataTag'  Tag name that will be applied to the detail data.
                            (optional)
    $detailData              2D Array of detail-data to be displayed when 
                             the row is expanded.
                             e.g. [ [ r1c1, r1c2, r1c3 ],
                                    [ r2c1, r2c2, r2,c3] ]
    $spans                   1D array of span information (optional) to be 
                             used for display of the detail information.
                             e.g.  [ col2 =>  "rows,cols", col4 =>  "rows,cols", ... ]

    $subLevelData            Optional Recursive expandData used to hold detail-data of detail-data.

MEMBER DATA

The following items are stored as member data

defaultCursor: Name of the mouse cursor pointer that is used for normal (i.e. non-title, non-indicator) cells in the widget. This is set to the value of the $widget->cget(-cursor) option when the widget is created.
indRowCols: Hash ref of Row/Cols indexes where there are indicators stores. This is a quick lookup hash built from _expandData.
_expandData: Internal version of the expandData hash. Any sub-detail data (i.e. expand data that is at lower levels of expandData) that is visible is placed at the top level of this hash, for keeping track of the visible expandData.

Widget Methods

In addition the standard Tk::TableMatrix widget method. The following methods are implemented:

showDetail

Shows (i.e. expands the table) the detail data for a given row. This method is called when a user clicks on an indicator that is not already expanded.

Usage:

 $widget->showDetail($row);  
 
 # Shows the detail data for row number $row

hideDetail

Hides the detail data for a given row. This method is called when a user clicks on an indicator that is already expanded.

Usage:

 $widget->hideDetail($row);  
 
 # Hides the detail data for row number $row