Lard Execution Environment

Bview module

The bview module implements the Block Viewer display, allowing annimations of system activity. The annimation is achieved by adding statements to the source program that specify colours and text annotations - see the block view library documentation for details of these calls.

The block view display is like a simple drawing package, but each element is given a tag by which it is refered to from the source program. The window looks as follows:

Window menu

Close this window

Edit menu

Delete, Raise, Lower or change the tag of the currently selected object.
Delete everything.

Options menu

Enable and disable snap-to-grid
Switch visible grid on or off

Toolbar

Rectangle drawing tool
Polygon drawing tool
Text tool
Selection tool