rostests/apitests/user32/ScrollDC.c

   1 /*
   2  * PROJECT:         ReactOS api tests
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * PURPOSE:         Test for ScrollDC
   5  * PROGRAMMERS:     Timo Kreuzer
   6  */
   7
   8 #include <apitest.h>
   9
  10 #include <wingdi.h>
  11 #include <winuser.h>
  12
  13 void Test_ScrollDC()
  14 {
  15         HWND hWnd, hWnd2;
  16         HDC hDC;
  17         HRGN hrgn;
  18         RECT rcClip;
  19         int iResult;
  20
  21         /* Create a window */
  22         hWnd = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  23                             100, 100, 100, 100,
  24                             NULL, NULL, 0, 0);
  25         UpdateWindow(hWnd);
  26         hDC = GetDC(hWnd);
  27
  28         /* Test that no update region is there */
  29         hrgn = CreateRectRgn(0,0,0,0);
  30         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  31         ok (iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);
  32
  33     /* Test normal scrolling */
  34         ok(ScrollDC(hDC, 0, 0, NULL, NULL, hrgn, NULL) == TRUE, "ScrollDC failed\n");
  35
  36     /* Scroll with invalid update region */
  37         DeleteObject(hrgn);
  38         ok(ScrollDC(hDC, 50, 0, NULL, NULL, (HRGN)0x12345678, NULL) == FALSE, "ScrollDC successed\n");
  39         ok(ScrollDC(hDC, 50, 0, NULL, NULL, hrgn, NULL) == FALSE, "ScrollDC successed\n");
  40         hrgn = CreateRectRgn(0,0,0,0);
  41         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  42         ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);
  43
  44     /* Scroll with invalid update rect pointer */
  45         ok(ScrollDC(hDC, 50, 0, NULL, NULL, NULL, (PRECT)1) == FALSE, "ScrollDC failed\n");
  46         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  47         ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);
  48
  49     /* Scroll with a clip rect */
  50     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  51         ok(ScrollDC(hDC, 50, 0, NULL, &rcClip, hrgn, NULL) == TRUE, "ScrollDC failed\n");
  52         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  53         ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);
  54
  55     /* Scroll with a clip rect */
  56     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  57         ok(ScrollDC(hDC, 50, 50, NULL, &rcClip, hrgn, NULL) == TRUE, "ScrollDC failed\n");
  58         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  59         ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);
  60
  61         /* Overlap with another window */
  62         hWnd2 = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  63                             30, 160, 100, 100,
  64                             NULL, NULL, 0, 0);
  65         UpdateWindow(hWnd2);
  66
  67     /* Cleanup */
  68         ReleaseDC(hWnd, hDC);
  69     DestroyWindow(hWnd);
  70     DestroyWindow(hWnd2);
  71
  72 }
  73
  74 START_TEST(ScrollDC)
  75 {
  76     Test_ScrollDC();
  77 }
  78