void FMEDITAPI UpdateScroll( void )
/*********************************/
{
RECT newrect;
RECT clrect;
POINT offset;
HWND wnd;
if( GetScrollConfig() == SCROLL_NONE ) {
return;
}
wnd = GetAppWnd();
GetClientRect( wnd, &clrect );
newrect = clrect;
RequestScrollRect( &newrect );
SetScrollRect( newrect );
GetOffset( &offset );
if( GetScrollConfig() & SCROLL_HORZ ) {
SetScrollRange( wnd, SB_HORZ, newrect.left, newrect.right - clrect.right, FALSE );
SetScrollPos( wnd, SB_HORZ, offset.x, TRUE );
}
if( GetScrollConfig() & SCROLL_VERT ) {
SetScrollRange( wnd, SB_VERT, newrect.top, newrect.bottom - clrect.bottom, FALSE );
SetScrollPos( wnd, SB_VERT, offset.y, TRUE );
}
}
static void DoScroll( HWND wnd, int dx, int dy, BOOL lock )
/*********************************************************/
{
/* scroll 'wnd' by 'dx' and 'dy'. 'lock' says to lock the scrolling on the */
/* bottom and right into the scrolling rectangle */
POINT offset;
RECT srect;
GetOffset( &offset );
GetScrollBounds( &srect, lock );
dx = AdjustScroll( offset.x, srect.left, srect.right, dx );
dy = AdjustScroll( offset.y, srect.top, srect.bottom, dy );
if( dx != 0 || dy != 0 ) {
offset.x += dx;
offset.y += dy;
SetOffset( offset );
ScrollWindow( wnd, -dx, -dy, NULL, NULL );
if( GetScrollConfig() & SCROLL_HORZ ) {
SetScrollPos( wnd, SB_HORZ, offset.x, TRUE );
}
if( GetScrollConfig() & SCROLL_VERT ) {
SetScrollPos( wnd, SB_VERT, offset.y, TRUE );
}
}
}
extern void ScrollResize( HWND wnd, WPARAM lparam )
/*************************************************/
{
RECT newrect;
POINT offset;
RECT clrect;
if( GetScrollConfig() == SCROLL_NONE ) {
return;
}
clrect.left = 0;
clrect.top = 0;
clrect.right = LOWORD( lparam );
clrect.bottom = HIWORD( lparam );
newrect = clrect;
RequestScrollRect( &newrect );
SetScrollRect( newrect );
GetOffset( &offset );
if( GetScrollConfig() & SCROLL_HORZ ) {
SetScrollRange( wnd, SB_HORZ, newrect.left, newrect.right - clrect.right, FALSE );
SetScrollPos( wnd, SB_HORZ, offset.x, TRUE );
}
if( GetScrollConfig() & SCROLL_VERT ) {
SetScrollRange( wnd, SB_VERT, newrect.top, newrect.bottom - clrect.bottom, FALSE );
SetScrollPos( wnd, SB_VERT, offset.y, TRUE );
}
}
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 );
}
extern void VerticalScroll( WPARAM wparam, LPARAM lparam, HWND wnd )
/******************************************************************/
{
int ydel;
RECT clrect;
POINT offset;
RECT scrollrect;
wparam = wparam;
lparam = lparam;
if( !(GetScrollConfig() & SCROLL_VERT) ) {
return;
}
GetClientRect( GetAppWnd(), &clrect );
scrollrect = GetScrollRect();
ydel = 0;
GetOffset( &offset );
switch( LOWORD( wparam ) ) {
case SB_BOTTOM:
ydel = scrollrect.bottom - offset.y - clrect.bottom;
break;
case SB_LINEDOWN:
ydel = LN_SC_AMOUNT;
break;
case SB_LINEUP:
ydel = -LN_SC_AMOUNT;
break;
case SB_PAGEDOWN:
ydel = (long)clrect.bottom * PG_SC_PERCENT / 100;
break;
case SB_PAGEUP:
ydel = -((long)clrect.bottom * PG_SC_PERCENT / 100);
break;
case SB_THUMBPOSITION:
//ydel = GET_WM_VSCROLL_POS( wparam, lparam ) - offset.y - clrect.bottom;
ydel = GET_WM_VSCROLL_POS( wparam, lparam ) - offset.y;
break;
case SB_TOP:
ydel = -offset.y;
break;
default:
break;
}
// make sure we do not expose area's not in the scroll rect
if( clrect.bottom <= scrollrect.bottom && clrect.top >= scrollrect.top ) {
if( ydel ) {
if( clrect.bottom + offset.y + ydel > scrollrect.bottom ) {
ydel = scrollrect.bottom - clrect.bottom - offset.y;
}
} else {
if( clrect.top + offset.y + ydel < scrollrect.top ) {
ydel = clrect.top + offset.y - scrollrect.top;
}
}
}
DoScroll( wnd, 0, ydel, TRUE );
}
extern void HorizontalScroll( WPARAM wparam, LPARAM lparam, HWND wnd )
/********************************************************************/
{
int xdel;
RECT clrect;
POINT offset;
RECT scrollrect;
wparam = wparam;
lparam = lparam;
if( !(GetScrollConfig() & SCROLL_HORZ) ) {
return;
}
GetClientRect( GetAppWnd(), &clrect );
scrollrect = GetScrollRect();
xdel = 0;
GetOffset( &offset );
switch( LOWORD( wparam ) ) {
case SB_BOTTOM:
xdel = scrollrect.right - offset.x - clrect.right;
break;
case SB_LINEDOWN:
xdel = LN_SC_AMOUNT;
break;
case SB_LINEUP:
xdel = -LN_SC_AMOUNT;
break;
case SB_PAGEDOWN:
xdel = (long)clrect.right * PG_SC_PERCENT / 100;
break;
case SB_PAGEUP:
xdel = -(long)clrect.right * PG_SC_PERCENT / 100;
break;
case SB_THUMBPOSITION:
//xdel = GET_WM_VSCROLL_POS( wparam, lparam ) - offset.x - clrect.right;
xdel = GET_WM_VSCROLL_POS( wparam, lparam ) - offset.x;
break;
case SB_TOP:
xdel = -offset.x;
break;
default:
break;
}
// make sure we do not expose area's not in the scroll rect
if( clrect.right <= scrollrect.right && clrect.left >= scrollrect.left ) {
if( xdel ) {
if( clrect.right + offset.x + xdel > scrollrect.right ) {
xdel = scrollrect.right - clrect.right - offset.x;
}
} else {
if( clrect.left + offset.x + xdel < scrollrect.left ) {
xdel = clrect.left + offset.x - scrollrect.left;
}
}
}
DoScroll( wnd, xdel, 0, TRUE );
}