<-- ! SpecTcl, by S. A. Uhler -- -- Copyright (c) 1994-1995 Sun Microsystems, Inc. -- -- See the file "license.txt" for information on usage and redistribution -- of this file, and for a DISCLAIMER OF ALL WARRANTIES. -->

canvas

The scrollable region on which the panel is built. The canvas contains the widgets for the interface, and the grid lines that demarcate the rows and columns.

cell

A cell is the intersection of a single row or column.

cavity

A cavity is one or more cells, in a rectangular region. Only one widget may occupy a cavity, and unless the widget has been configure to fill its cavity, much of it will appear empty. Grid lines will not pass through a cavity, only around its edges.

column

A column is the vertical space between grid lines. In the context of a widget, its column represents the left most column in its cavity. Columns are numbered starting at one (1).

column-span

A column-span is the number of columns occupied by a widget, which is the same as its cavities.

option sheet

Each widget has a list of name/value pairs that specify all the needed to specify the properties of that widget. This list of name/value pairs is called a property sheet, which is accessed by double-clicking on the widget.

grid

The grid demarcates the set of rows and columns for the interface, dividing it into cells into which widgets may be placed.

item_name

This is the name the application uses to access a widget. If the widget's procedure is instantiated by project_ui $frame, then the full name of the widget is $frame.item_name

palette

The palette is the column of buttons on the left side of the user interface that indicated the widgets. Widgets are created by clicking on a palette item, and dragging it onto the desired location on the canvas.

panel

A panel consists of all the widgets created together on the canvas at one time. Panels are saved as a single ui file, and are instantiated by c A panel consists of all the widgets created together on the canvas at one time. Panels are saved as a single ui file, and are instantiated by calling the panel's procedure with the name of the frame (or toplevel) it is to be rendered in. A typical application consists of one or more panels.

row

A row is the horizontal space between grid lines. In the context of a widget, its horizontal represents the top most column in its cavity. Rows are numbered starting at one (1).

row-span

A Row-span is the number of rows occupied by a widget, which is the same as its cavities.

tool-bar

The tool-bar is the row of icons and menus along the top of the user interface, just under the menu bar, that provides a short cut for setting common properties for the selected widget.

sub-grid

A sub-grid is a table of rows and columns that occupies a cavity either in the main grid, or in another sub-grid. Sub-grids, which are created by dragging frames onto the existing grid, are used when widgets don't naturally align themselves in rows or columns.

widget

A widget is an atomic user interface element, such as a button or scrollbar. All of the available widgets are presented on the palette.

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