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If ScrollWindowEx do not use the DCX_USESTYLE to get a DC. Instead

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calculate DCX_CLIPSIBLINGS, DCX_PARENTCLIP and DCX_CLIPCHILDREN. The
DCX_CLIPCHILDREN is not used when ScrollWindowEx is called with a
SW_SCROLLCHILDREN flag. With a couple of regression tests.
This commit is contained in:
Rein Klazes 2005-03-31 15:30:25 +00:00 committed by Alexandre Julliard
parent b59484de49
commit 7c342b4ce3
2 changed files with 74 additions and 8 deletions
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73
dlls/user/tests/win.c
View File

@ -2603,12 +2603,14 @@ void test_scrollvalidate( HWND parent)
/* create two overlapping child windows. The visual region
* of hwnd1 is clipped by the overlapping part of
* hwnd2 because of the WS_CLIPSIBLING style */
HWND hwnd2 = CreateWindowExA(0, "static", NULL,
WS_CHILD| WS_VISIBLE | WS_CLIPSIBLINGS | WS_BORDER ,
75, 30, 100, 100, parent, 0, 0, NULL);
HWND hwnd1 = CreateWindowExA(0, "static", NULL,
WS_CHILD| WS_VISIBLE | WS_CLIPSIBLINGS | WS_BORDER ,
25, 50, 100, 100, parent, 0, 0, NULL);
HWND hwnd1, hwnd2;
hwnd2 = CreateWindowExA(0, "static", NULL,
WS_CHILD| WS_VISIBLE | WS_CLIPSIBLINGS | WS_BORDER ,
75, 30, 100, 100, parent, 0, 0, NULL);
hwnd1 = CreateWindowExA(0, "static", NULL,
WS_CHILD| WS_VISIBLE | WS_CLIPSIBLINGS | WS_BORDER ,
25, 50, 100, 100, parent, 0, 0, NULL);
ShowWindow( parent, SW_SHOW);
UpdateWindow( parent);
GetClientRect( hwnd1, &rc);
@ -2642,6 +2644,63 @@ void test_scrollvalidate( HWND parent)
trace("update rect is %ld,%ld - %ld,%ld\n",
rcu.left,rcu.top,rcu.right,rcu.bottom);
ReleaseDC( hwnd1, hdc);
/* now test ScrollWindowEx with a combination of
* WS_CLIPCHILDREN style and SW_SCROLLCHILDREN flag */
/* make hwnd2 the child of hwnd1 */
DestroyWindow( hwnd2);
hwnd2 = CreateWindowExA(0, "static", NULL,
WS_CHILD| WS_VISIBLE | WS_BORDER ,
50, 50, 100, 100, hwnd1, 0, 0, NULL);
SetWindowLong( hwnd1, GWL_STYLE, GetWindowLong( hwnd1, GWL_STYLE) & ~WS_CLIPSIBLINGS);
GetClientRect( hwnd1, &rc);
cliprc=rc;
/* WS_CLIPCHILDREN and SW_SCROLLCHILDREN */
SetWindowLong( hwnd1, GWL_STYLE, GetWindowLong( hwnd1, GWL_STYLE) | WS_CLIPCHILDREN );
ValidateRect( hwnd1, NULL);
ValidateRect( hwnd2, NULL);
ScrollWindowEx( hwnd1, -10, -10, &rc, &cliprc, hrgn, &rcu,
SW_SCROLLCHILDREN | SW_INVALIDATE);
if (winetest_debug > 0) dump_region(hrgn);
exprgn = CreateRectRgn( 88,0,98,88);
tmprgn = CreateRectRgn( 0,88,98,98);
CombineRgn( exprgn, exprgn, tmprgn, RGN_OR);
ok( EqualRgn( exprgn, hrgn), "wrong update region\n");
/* SW_SCROLLCHILDREN */
SetWindowLong( hwnd1, GWL_STYLE, GetWindowLong( hwnd1, GWL_STYLE) & ~WS_CLIPCHILDREN );
ValidateRect( hwnd1, NULL);
ValidateRect( hwnd2, NULL);
ScrollWindowEx( hwnd1, -10, -10, &rc, &cliprc, hrgn, &rcu, SW_SCROLLCHILDREN | SW_INVALIDATE);
if (winetest_debug > 0) dump_region(hrgn);
/* expected region is the same as in previous test */
ok( EqualRgn( exprgn, hrgn), "wrong update region\n");
/* no SW_SCROLLCHILDREN */
SetWindowLong( hwnd1, GWL_STYLE, GetWindowLong( hwnd1, GWL_STYLE) & ~WS_CLIPCHILDREN );
ValidateRect( hwnd1, NULL);
ValidateRect( hwnd2, NULL);
ScrollWindowEx( hwnd1, -10, -10, &rc, &cliprc, hrgn, &rcu, SW_INVALIDATE);
if (winetest_debug > 0) dump_region(hrgn);
/* expected region is the same as in previous test */
ok( EqualRgn( exprgn, hrgn), "wrong update region\n");
/* WS_CLIPCHILDREN and no SW_SCROLLCHILDREN */
SetWindowLong( hwnd1, GWL_STYLE, GetWindowLong( hwnd1, GWL_STYLE) | WS_CLIPCHILDREN );
ValidateRect( hwnd1, NULL);
ValidateRect( hwnd2, NULL);
ScrollWindowEx( hwnd1, -10, -10, &rc, &cliprc, hrgn, &rcu, SW_INVALIDATE);
if (winetest_debug > 0) dump_region(hrgn);
exprgn = CreateRectRgn( 88,0,98,20);
tmprgn = CreateRectRgn( 20,20,98,30);
CombineRgn( exprgn, exprgn, tmprgn, RGN_OR);
tmprgn = CreateRectRgn( 20,30,30,88);
CombineRgn( exprgn, exprgn, tmprgn, RGN_OR);
tmprgn = CreateRectRgn( 0,88,30,98);
CombineRgn( exprgn, exprgn, tmprgn, RGN_OR);
ok( EqualRgn( exprgn, hrgn), "wrong update region\n");
/* clean up */
DeleteObject( hrgn);
DeleteObject( exprgn);
@ -2749,6 +2808,6 @@ START_TEST(win)
test_scroll();
UnhookWindowsHookEx(hhook);
test_window_styles();
}

9
windows/scroll.c
View File

@ -104,10 +104,17 @@ INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy,
else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
if( !IsRectEmpty(&cliprc) && (dx || dy)) {
DWORD dcxflags = DCX_CACHE;
DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
caretrc = rc;
hwndCaret = fix_caret(hwnd, &caretrc, flags);
hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE );
if( style & WS_CLIPSIBLINGS) dcxflags |= DCX_CLIPSIBLINGS;
if( GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC)
dcxflags |= DCX_PARENTCLIP;
if( !(flags & SW_SCROLLCHILDREN) && (style & WS_CLIPCHILDREN))
dcxflags |= DCX_CLIPCHILDREN;
hDC = GetDCEx( hwnd, 0, dcxflags);
if (hDC)
{
ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate );