extern void AutoScroll( RECT eatom, POINT delta )
/***********************************************/
{
POINT offset;
RECT clrect;
HWND wnd;
int xdel;
int ydel;
POINT mouse;
eatom = eatom; /* ref'd to avoid warnings */
if( GetScrollConfig() == SCROLL_NONE ) {
return;
}
wnd = GetAppWnd();
GetClientRect( wnd, &clrect );
GetOffset( &offset );
OffsetRect( &clrect, offset.x, offset.y );
xdel = 0;
ydel = 0;
mouse = GetPrevMouse();
mouse.x += delta.x;
mouse.y += delta.y;
if( (delta.x > 0 &&
(abs( mouse.x - clrect.right ) < GetHorizontalInc() ||
mouse.x > clrect.right)) ||
(delta.x < 0 &&
(abs( mouse.x - clrect.left ) < GetHorizontalInc() ||
mouse.x < clrect.left)) ) {
xdel = delta.x;
if( xdel > 0 ) {
xdel = __max( 1, (xdel * SLOW_DOWN_N) / SLOW_DOWN_D );
} else {
xdel = __min( -1, (xdel * SLOW_DOWN_N) / SLOW_DOWN_D );
}
}
if( (delta.y > 0 &&
(abs( mouse.y - clrect.bottom ) < GetVerticalInc() ||
mouse.y > clrect.bottom)) ||
(delta.y < 0 &&
(abs( mouse.y - clrect.top ) < GetVerticalInc() ||
mouse.y < clrect.top)) ) {
ydel = delta.y;
if( ydel > 0 ) {
ydel = __max( 1, (ydel * SLOW_DOWN_N) / SLOW_DOWN_D );
} else {
ydel = __min( -1, (ydel * SLOW_DOWN_N) / SLOW_DOWN_D );
}
}
if( !(GetScrollConfig() & SCROLL_VERT) ) {
ydel = 0;
}
if( !(GetScrollConfig() & SCROLL_HORZ) ) {
xdel = 0;
}
DoScroll( wnd, xdel, ydel, TRUE );
UpdateWindow( wnd );
}
static BOOL FilterMoveKeys( int keycode, LPPOINT pt )
/***************************************************/
{
BOOL ret;
ret = TRUE;
switch( keycode ) {
case VK_LEFT:
pt->x = -GetHorizontalInc();
pt->y = 0;
break;
case VK_UP:
pt->x = 0;
pt->y = -GetVerticalInc();
break;
case VK_RIGHT:
pt->x = GetHorizontalInc();
pt->y = 0;
break;
case VK_DOWN:
pt->x = 0;
pt->y = GetVerticalInc();
break;
default:
ret = FALSE;
break;
}
return( ret );
}