I just started using two monitors with Windows XP and a laptop. I found this
can lead to interesting problems. My secondary monitor is arranged to the left
of my primary monitor. This results in the X value of all screen coordinates on
the secondary monitor being negative.
When I use the laptop without the second monitor, all windows that have saved
positions using the second monitor (that is, with negative X values) are
undisplayable when not maximized.
Some applications handle this better than others. J has problems with the saved
noun WINPOS:
WINPOS_j_
+-----------+-----------------+
|jfiw |_859 593 482 164 |
+-----------+-----------------+
|projectform|330 147 384 498 |
+-----------+-----------------+
|fif |_1028 12 1032 776|
+-----------+-----------------+
|plot |431 73 492 402 |
+-----------+-----------------+
|jdebug |15 313 1160 390 |
+-----------+-----------------+
Opening Find in Files or just Find on a single monitor configuration after using
them on the secondary monitor of a multiple monitor configuration has no visible
result.
Here is a sketch of a fix. This only addresses one of the issues with multiple
monitor support. I'm sure that there are more.
NB. Fix WINPOS
NB. Issue: J does not support multiple monitors well.
NB. Simple fix, force WINPOS xy to screen xy when WINPOS is less than screen
require 'dll winapi'
GetSystemMetrics=: >@{.@('User32 GetSystemMetrics i i'&cd)
SM_CMONITORS=:80
SM_XVIRTUALSCREEN =:76
SM_YVIRTUALSCREEN =:77
SM_CXVIRTUALSCREEN =:78
SM_CYVIRTUALSCREEN =:79
fixWINPOS=: 3 : 0
NB. get x and y of virtual screen
sm=.GetSystemMetrics"0 SM_XVIRTUALSCREEN,SM_YVIRTUALSCREEN
NB. get x and y from WINPOS
q=.0 1{"1 >1{"1 WINPOS_j_
NB. find where x or y of WINPOS are less than the screen x or y
f=.q<"1 sm
NB. replace WINPOS x y with screen x y where less
rp=.(f*"1 sm)+q*"1 -.f
qq=.(<"1 rp) (0 1)}&.> ]1{"1 WINPOS_j_
WINPOS_j_=:qq 1}"0 1 WINPOS_j_
)
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