nanogui: delayed mouse movements
Subject:
Re: delayed mouse movements
From:
"Greg Haerr" ####@####.####
Date:
2 Mar 2000 06:11:34 -0000
Message-Id: <01e801bf840c$91f21a60$15320cd0@gregh>
: >From an examination of the code, I think that the problem lies with
: the buffering of mouse movements in drivers/mou_ser.c. When the mouse
: is read by GdReadMouse() it can leave data in the buffer which will
: not be processed until the next time the mouse is physically moved.
: I have made the following change to nanox/srvevent.c and mwin/winevent.c
: which causes all buffered data to be processed whenever a mouse event
: occurs. This appears to fix the problem (I suspect that the only reason
: I saw it in the first place is that the Prisma is very slow at displaying
: bitmaps so mouse movements could get ahead of the cursor display updates).
:
What version of Microwindows are you running? Microwin or Nano-X
API? I changed an if statement to a while loop in the main GsSelect()
code that also might help with this.
Thanks for the patch. I don't use the direct serial driver much, so I haven't
seen this, although the above fix was implemented for slower systems running
the 3d demo....
After I hear from you in regards to the version you're running, I'll probably
add this patch.
Regards,
Greg
: George Harvey
: ####@####.####
:
:
: *** srvevent.orig.cTue Feb 29 22:14:57 2000
: --- srvevent.cTue Feb 29 22:16:10 2000
: ***************
: *** 100,114 ****
: intmousestatus;/* latest mouse status */
:
: /* Read the latest mouse status: */
: ! mousestatus = GdReadMouse(&rootx, &rooty, &newbuttons);
: if(mousestatus < 0) {
: GsError(GR_ERROR_MOUSE_ERROR, 0);
: return FALSE;
: - } else if(mousestatus) {/* Deliver events as appropriate: */
: - GsHandleMouseStatus(rootx, rooty, newbuttons);
: - return TRUE;
: }
: ! return FALSE;
: }
:
: /*
: --- 100,113 ----
: intmousestatus;/* latest mouse status */
:
: /* Read the latest mouse status: */
: ! while ((mousestatus = GdReadMouse(&rootx, &rooty, &newbuttons)) > 0) {
: ! GsHandleMouseStatus(rootx, rooty, newbuttons);
: ! }
: if(mousestatus < 0) {
: GsError(GR_ERROR_MOUSE_ERROR, 0);
: return FALSE;
: }
: ! return TRUE;
: }
:
: /*
:
:
:
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