inform7/resources/Documentation/Examples/CornerOfNoAndWhere.txt

Example: * Corner of No and Where
Location: Longer extracts of Inform 6 code
RecipeLocation: The Status Line
Index: Status line with centered text, the hard way
Description: A status line which has only the name of the location, centered.
For: Z-Machine

Making major changes to display features, such as the construction of the status line, sometimes requires that we rely on Inform 6 in bulk; here is how we might produce the Trinity-style status line, with the location centered at the top center of the screen.

	{*}"Corner of No and Where"

	No is a room. Where is west of No.

	Rule for constructing the status line:
		print the location in the center of the status line;
		rule succeeds.

	To print the location in the center of the status line:
		(- PrintCenteredStatus(); -).

	Include (-

	Array printed_text --> 64;

	[ PrintCenteredStatus i j;
		@set_cursor 1 0;
		i = 0->33;
		spaces(i);
		@output_stream 3 printed_text;
		print (name) location;
		@output_stream -3;
		j = (i - (printed_text-->0))/2;
		@set_cursor 1 j;
		print (name) location;
		spaces j-1;
	];

	-)

	Test me with "w / e".

In fact, as we've already seen, many extra modifications to the display behavior are possible using Basic Screen Effects.