The Frame Footer and Busy Indicator
The argument :show-footer T of the frame procedure causes the footer to be
created for the frame widget. The footer is a frame window having a width
equal to the width of the frame widget and a height of 1 character. It is
positioned at the bottom of the frame widget.
The footer widget contains a message window which is used to hold short
term information messages from the application. By default the message is
left justified by this can be modified by the command
The busy indicator is normally used by the application to indicate that it is
performing some action which may take more than the normal interactive
response time. Typically this is used during networked server accesses and
when spanning a shell to execute a program in foreground. The indicator is
created by configuring the background colour of the footer widget windows.
The colour used is taken from the task variable tkfooterbusycolor. It has the
default value Pink.
If the footer message is empty at the time that the busy indicator is enabled
then the message Busy.... is additionally put into the footer.
The busy indicator is controlled by the command