C&C Gold on Linux, windowed mode: howto grab mouse to allow scrolling

Grabbing macro not needed anymore!
http://hifi.iki.fi/cnc-ddraw/
Use cnc-ddraw instead!

Wine's grab mouse is long broken (for YEARS!) and RTS games with edge scrolling seems unplayable for me. Especially, C&C gold has no other methods to scroll than the edge scrolling, which screws the game play. However, there is a walkaround.

First, we need to get mouse jail: http://www.linuxquestions.org/questions/linux-general-1/confine-mouse-movement-mouse-jail-729654/
For mouse jail to work, we need xdotool installed.

confine.sh (mouse jail script) : Just in case the link gets broken...

#!/bin/bash

borderxl=$1
borderyu=$2

borderxr=$3
borderyd=$4

check=0

if [ $borderxl -gt $borderxr ]
then
    check=1
fi

if [ $borderyu -gt $borderyd ]
then
    check=1
fi
if [ $check -ge "1" ]
then
    echo "Make sure the first coordinate pair refers to the upper left corner"
    echo "and the second pair refers to the lower right one."
fi

if [ $check -lt "1" ]
then
    while [ true ]
    do
        check=0
        xpos=`xdotool getmouselocation | awk '{ print $1}'`
        xpos=${xpos:2}
        #xpos=`getcurpos | awk '{ print $1}'`
        ypos=`xdotool getmouselocation | awk '{ print $2}'`
        ypos=${ypos:2}
        #ypos=`getcurpos | awk '{ print $2}'`
       
        if [ $xpos -gt $borderxr ]
        then
            check=1
            xpos=$borderxr
        fi
   
        if [ $ypos -gt $borderyd ]
        then
            check=1
            ypos=$borderyd
        fi
   
        if [ $xpos -lt $borderxl ]
        then
            check=1
            xpos=$borderxl
        fi
   
        if [ $ypos -lt $borderyu ]
        then
            check=1
            ypos=$borderyu
        fi
   
   
        if [ $check -ge "1" ]
        then
            xdotool mousemove $xpos $ypos
        fi
    done   
fi

Here's the script to start C&C gold in windowed mode.
The idea is to place the game window to some exact position (150,120) and use this information to confine.sh to trap the cursor in the game area. We already "know" that the game has a resolution of 1024x768 (using nyergud's patch), hence we can trap the cursor with ZERO error.

#!/bin/bash
HERE=`pwd`

cd "$HOME/.wine/drive_c/Westwood/C&C95"
taskset 0x00000001 wine explorer /desktop=DAWN,1024x768 C\&C95.exe &
sleep 1

cd $HERE

WIDS=`xdotool search --name "DAWN - Wine"`
echo $WIDS
xdotool windowmove $WIDS 150 120
./confine.sh 150 120 `expr 150 + 1024 - 1` `expr 120 + 768 - 1`

Voila!
For me, it seems that I need taskset to stabilize the game: restrict the game to a single core.