Message-ID: <3901C823.C3B39CF3@geocities.com>
From: Sahab Yazdani <beyonder69 AT geocities DOT com>
Organization: PheonixSoft Inc.
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Newsgroups: comp.os.msdos.djgpp
Subject: my mouse driver..
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Date: Sat, 22 Apr 2000 11:41:23 -0400
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hello everybody.. I've written a mouse event handler in DJGPP which for
the most part works extremely well in either Graphics or Text based
video modes, except that the darned thing is way too sensative.  A
single average click of the mouse results in roughly 5-10 software
clicks in a program that I write with my driver.  So as a result this
mouse driver can use some tweaking.  As the code is upwards of 300 lines
I will not post it all, but just snippets from it, but if anybody feels
that the whole source code is nessesary to check it I will gladly post
it.. 

[the code - snippets]

// The Actual Event Handler 
static void MouseHandler( _go32_dpmi_registers *r ) {
   CallBackData.Event = r->x.ax;
   CallBackData.ButtonState = r->x.bx;
   CallBackData.X = r->x.cx;
   CallBackData.Y = r->x.dx;
   CallBackData.XMickeys = r->x.si;
   CallBackData.YMickeys = r->x.di;

   MouseDrawCursor(); // Ignore this line as it does not relate to
problem
}

// The Event Installer
void GMouse::InstallInterruptHandler() {
	__dpmi_regs regs;

	_go32_dpmi_lock_data( &CallBackData, sizeof( CallBackBlock ) );
   _go32_dpmi_lock_data( &cursor, sizeof( GBitmap * ) );
   _go32_dpmi_lock_data( &destination, sizeof( GScreen * ) );
   _go32_dpmi_lock_data( &MouseDraw, sizeof( int ) );
   _go32_dpmi_lock_data( &oldX, sizeof( int ) );
   _go32_dpmi_lock_data( &oldY, sizeof( int ) );

   _go32_dpmi_lock_code( (void *)MouseHandler,
(long)end_int_mouse-(long)MouseHandler );
   _go32_dpmi_lock_code( (void *)MouseDrawCursor,
(long)end_code_draw-(long)MouseDrawCursor );

   mouse_callback.pm_offset = (int) MouseHandler;
   mouse_callback.pm_selector = _go32_my_cs();

	_go32_dpmi_allocate_real_mode_callback_retf(&mouse_callback,
&used_registers);

// Move to a Better place later
   oldX = -1;
   oldY = 0;

   regs.x.ax = 0x0C;
   regs.x.cx = 0x7F; // This is where I think the problem is originating
from.  I am catching all events... but I don't know what to do about
it...
   regs.x.dx = mouse_callback.rm_offset;
   regs.x.es = mouse_callback.rm_segment;
   __dpmi_int( 0x33, &regs );

   MouseStateFlag = 1;
}

// To Check if a button was pressed
// Not sure if there is anything wrong with this or not...
int GMouse::ButtonPressed() {
	if ( (CallBackData.ButtonState & 0x01)!=0 ) {
   	return MOUSE_LEFTBUTTON;
   }
	if ( (CallBackData.ButtonState & 0x02)!=0 ) {
   	return MOUSE_RIGHTBUTTON;
   }
	return FALSE;
}

thank you all for any help you may provide!

-- 
***********************************************************
* Sahab Yazdani * "We are all who we are, no more and no  *
* Thornhill S.S * less" - al'Lan Mandragoran              *
***********************************************************
* http://pheonixware.8m.com/                              *
***********************************************************