mouse big cross cursor and hotkeys in "pause mouse"

[Petr M. <mi...@ph...>]

As I use the new ginput.m for accessing gnuplot mousing events from Octave,
I can see some current "inconvencies". In principle, we would be of
advantage to get ginput(n) functionality of Matlab.

Thus:

A. Currently, there is no indication in the terminal windows that it is
doing "pause mouse".

Solution: change cursor to big cross -- ie like a ruler after "r", but the
cross follows mouse until "pause mouse" stops.


B. Mousing hotkeys (including those "hardcoded" to x11 like "q" and "space")
should be disabled during "pause mouse".

Solution and functionality: If a hotkey is pressed during "pause mouse",
then it stops pausing, and set MOUSE_BUTTON=0 and MOUSE_HOTKEY=keycode for
the key pressed.

Usage - example: Pressing "q" in gnuplot's terminal window will pass the "q"
to the caller by MOUSE_HOTKEY, and it may quit mouse tracking and evaluation
functionality.

Question:

- Should the command be "pause mouse hotkey" or "pause mouse nohotkeys"?

- x11_set_cursor(), pm_set_cursor() etc. should be changed from

	term_set_cursor(int type, int x, int y)
to
	term_set_special(int what, int option, int x, int y)

Then, this API will be general enough to send mousing events without adding
new term functions. E.g.

term->set_special(TERM_SPECIAL_RULER, ruler_type, x, y)
term->set_special(TERM_SPECIAL_HOTKEYS, 1, 0, 0)  // enable hotkeys
term->set_special(TERM_SPECIAL_HOTKEYS, 0, 0, 0)  // disable
term->set_special(TERM_SPECIAL_RAISE, 0, 0, 0)  // used by "raise" and
term->set_special(TERM_SPECIAL_LOWER, 0, 0, 0)  // "lower" commands


What do you think?

Could somebody start to implement this?

--
PM