Wishlist

Suggestions and ideas for the window handler and related programs (and also
known bugs):


WHP and WHL
===========

1)	A common input/output buffer for characters entered from the keyboard.

2)	Possible to move windows outside the screen.

3)	Possibility to put icons in the background (something like the Xerox
	Star).

4)	Suspend write request when XOFF is received. Only CTRL-Q should mean
	XON (if the flags says so).

5)	Window stacks, i.e. the window handler automatically adds an offset to
	the given location of a window when creating it. The stack formation
	is kept when a window is moved to another level in the stack.
	It should be possible to take a window from the stack and move it
	to the top level (outside the stack). When the work in the window has
	been finished, the window can be put back to its original place in the
	stack.

6)	Add a new type of text saving where every character is saved with a
	corresponding attribute byte. The extra byte is used to save under-
	line attribute and font. The contents of the virtual screen will be
	remembered when font changes are made if all the fonts have the same
	box size and the base line is the same.

7)	As an alternative to inverting the window header, the whole upper side
	of the window border can be inverted.

8)	AND, OR, and XOR operations when graphics is used.

9)	Possible to change the signals w_csig, w_rsig, w_tsig, and w_ntsig
	for a window.

10)	Possible to remove single or a whole group of icons from a window.

11)	Removing and adding boxes in the window borders.

12)	More escape sequences (taken from the Twist Terminal):
	  Set margin bell position		ESC [ ?B
	  Enable margin bell			ESC [ ?37 l
	  Disable margin bell			ESC [ ?37 h
	  Screen on				ESC [ ?36 l
	  Screen off				ESC [ ?36 h
	  Set left and right margins		ESC [ Pnl ; Pnr v
	  End security field			ESC [ 0 s
	  Start security field			ESC [ 1 s

13)	When the default font is changed, no check is made if the virtual
	screen becomes too big.

14)	Possible to create and remove a window through the "super" channel.
	One window shall always be reserved for this purpose and it can be
	used, for example, to tell the user when something fails etc.

15)	Escape sequence to draw lines with different thickness. This
	escape sequence should be capable of drawing a line with a pattern.

16)	Turn a rectangle. The escape sequence shall be
	ESC : <x> ; <y> ; <op> t
	where <x> and <y> is the upper right corner of the rectangle (the
	lower left corner is the graphic cursor position).
	<op> is 0 if turning 90 degrees clockwise, 1 if 180 degrees and
	2 if 270 degrees.
	The turned rectangle will have its lower left corner at the same
	place as the old rectangles lower left corner.
	The new graphic cursor position is <x>, <y>.

17)	A flag which says that the screen shall not be turned on if a write
	request to the window is received. (Is it possible?)

18)	If the BX_AVIS flag is set for a window and the size of the window
	changes from the whole virtual screen to a part of it because the
	default font is changed, the scroll left, right, up, and down
	boxes are not removed.

19)	To save code the bitmap of the border boxes can be put in the
	'ubuf' union.

20)	The cnvsubst() function can be made more compact by using tables.

21)	Add a flag (SIZSCROLL) which behaves similar to the KEYSCROLL and
	WRITSCROLL flags, but the window is scrolled when the window size
	changes.