table_slice.md
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class table_slice {#class-table_slice}

Class table_slice is a super-class of class table_row and class table_column for implementation purposes. The user shall normally never create instances of this class directly.

table_slice<-alignment: {top,bottom,left,right,center,reference,stretch} Default alignment of cells. This variable is refined by table_column <->halign and table_row <->valign, which should be used by the application programmer for specifying row/column alignment.
table_slice<-displayed: bool Determines whether the row/column is actually displayed in the table. The default is @on. The cells of a not-displayed row are considered to determine the column-widths, but the row is not displayed. Same holds for not-displayed columns.

This feature is suitable for quickly inserting and deleting rows/columns, for example to realise scrolling of not-to-big tables while maintaining title rows, collapsing/expanding groups of rows/columns, etc.

BUGS: Hiding rows/columns holding spanned cells may yield unexpected results.
table_slice<-end_group: bool If the associated <-table has table->rules: groups, a line will be painted below (table_row object) or right (table_column object) of the slice.
table_slice<-index: int The column-index for a table_column object, and the row-index for a table_row object. Assigned and maintained by the <-table.
table_slice<->name: name* Name of the column/row. Used with table <-row and table<-column to get access to a row/column by name. Default is @nil, implying the row/column cannot be accessed by its name.
table_slice<-position: int Offset of this row/column to the origin of the device. Maintained by table->compute. See also <-width, <-reference and <-index.
table_slice<-reference: int If the slice holds cells aligned by there reference (see table_cell <-halign), this value is the location of the reference point relative to the top/left of the row/column.

See also <-width. Set by the table_row ->compute or table_column->compute.
table_slice<-rubber: rubber* Rubber object that describes the minimum and maximum dimension as well as the stretch- and shrinkability of the slice. If @nil, the natural width of a column is the maximum of the widths of the contained cells and the stretch and shrinkability are both 100.

See also table->width.
table_slice<-selected: bool If @on, all cells in the row/column are selected. For example, to select a named column in a table, do:
```
...,
get(Table, column, Name, Col),
send(Col, selected, @on),
...
```
To deselect all columns in a table, use
```
...,
send(Table?columns, for_all,
    message(@arg1, selected, @off)),
...
```
See also table_cell ->selected.
table_slice<-table: table* Table this row/column is part of.
table_slice<-width: 0.. Total width of the row/column, set by table_row->compute or table_column->compute. See also <-reference.