DigFourShift

Shift between four pages in the subgraph. The subgraph has to contain at least four pages.

The object is connected to three digital signals in the database.
If the value is 1 on Attribute1, the first page is drawn, if Attribute2 is 1 the second page
is drawn, and if Attribute3 is 1 the third page is drawn. If the value is 0 on all signals,
the last page is drawn. If several attributes it set, higher page number has higher priority.

Attribute		Description
DigFourShift.Attribute1		Signal in the database or type Boolean that shifts
		page. Activates drawing of the first page.
DigFourShift.Attribute2		Signal in the database or type Boolean that shifts
		page. Activates drawing of the second page.
DigFourShift.Attribute3		Signal in the database or type Boolean that shifts
		page. Activates drawing of the third page.