Tricks of the Mac Game Programming Gurus/TricksOfTheMacGameProgrammingGurus.iso/Information/Stuart's Tech Notes/Moving the mouse pointer.c

Text File | 1995-06-14 | 930 b | 32 lines | [TEXT/R*ch]

// (C) 1992 Stuart Cheshire <[e-mail]>
// The user moves the mouse pointer with the mouse.
// A program moving the mouse pointer is stricly against Apple guidelines,
// and is guaranteed to annoy your users in 99% of cases.
//
// However, Bolo moves the mouse pointer when the map scrolls, so that the
// building cursor stays in the same place relative to the map, and amazingly,
// no one has flamed me for it. Not even anyone at Apple.
//
// So, it can be done, and here is how:

#include "StuTypes.h"

Point MTemp     : 0x828;
Point RawMouse  : 0x82C;
Point Mouse     : 0x830;
char CrsrNew    : 0x8CE;
char CrsrCouple : 0x8CF;

export void offset_mouse_location(short xoff, short yoff)
    {
    short statusregister = Disableinterrupts();
    Mouse.h += xoff;
    Mouse.v += yoff;
    MTemp.h += xoff;
    MTemp.v += yoff;
    RawMouse.h += xoff;
    RawMouse.v += yoff;
    CrsrNew = CrsrCouple;
    RestoreInterrupts(statusregister);
    }