Re: Cursor fonts ..............
*-Phillip Neumann <filsin@interaccess.cl>
|
| Why does the cursor changes its look when, i.e, changing from the root window (X-like cursor) to a application (arow cursor)? Does the app say X to change the cf (cursor font) from X to arrow and then when going back to the root window it says X to change it again?
Yes. Every window can have its own cursor. Remember that eg. scrollbars
are windows of their own, as are the wm frames.
| Inside the file /usr/X11R6/include/X11/cursorfont.h are lines like this:
|
| #define XC_X_cursor 0
| #define XC_arrow 2
|
| So i imagine the `application' says "ok, X, now you will change the cf from 0 to 2" and then X see cursorfont.h and think "yeah, i will change the cf to `arrow'", then X thinks again "acording to /usr/X11R6/lib/fonts/misc/cursor.pcf.gz i will draw this arrow"...
|
| Is this true? cf works like this?
Almost. What happens is that when the application creates a window, it
also says "I like that cute little XC_arrow. I hereby declare that
XC_arrow will be the cursor when the pointer is inside me!". When the
program is compiled, XC_arrow is simply replaced with 2. Then X gets
the message and thinks "That window wants cursor 2. Then I will
use cursor number 2 in the cursor font when it has the pointer."
| i guess not, becouse changing ```#define XC_X_cursor 0''' to ```#define XC_arrow 0''' dont change the X-cursor to an arrow... so how does it work?
This does not really happen dynamically. The name->number mapping is
fixed at compile time.
| I want to know this becouase i would like to change the default cursors to other ones...
You could always try to hack the font itself...
| I have done xsetroot -cursor hi hi , where hi is a file drawed with bitmap, but this only change the root's cf (`X').
Yup. Changing the applications cursor isn't trivial. Changing the
cf is one possibility. If you are an (aspiring) C hacker you can do
this in the wm.
Well written apps may have resources to change the cursors.
| (btw, i can only draw black points... how do i draw whites ones? or better color ones?)
If you use 'bitmap', right mouse button clears pixels. Unfortunately,
I don't think it is possible to use coloured cursors. I'd love to
be proved wrong, though.
| i have try to see the cf's, but `xfontsel -fn cursor.pcf' cannot open it...
xfd -fn cursor
| How do i change the cursor for writing thinks (the default one) to a pen for example?
Dunno. There are probably some font editing programs in
Debian somewhere...
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