rostests/apitests/user32api/tests/ScrollDC.c

   1 #include "../user32api.h"
   2
   3 INT
   4 Test_ScrollDC(PTESTINFO pti)
   5 {
   6         HWND hWnd, hWnd2;
   7         HDC hDC;
   8         HRGN hrgn;
   9         RECT rcClip;
  10
  11         /* Create a window */
  12         hWnd = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  13                             100, 100, 100, 100,
  14                             NULL, NULL, g_hInstance, 0);
  15         UpdateWindow(hWnd);
  16         hDC = GetDC(hWnd);
  17
  18         /* Assert that no update region is there */
  19         hrgn = CreateRectRgn(0,0,0,0);
  20         ASSERT(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION);
  21
  22     /* Test normal scrolling */
  23         TEST(ScrollDC(hDC, 0, 0, NULL, NULL, hrgn, NULL) == TRUE);
  24
  25     /* Scroll with invalid update region */
  26         DeleteObject(hrgn);
  27         TEST(ScrollDC(hDC, 50, 0, NULL, NULL, hrgn, NULL) == FALSE);
  28         hrgn = CreateRectRgn(0,0,0,0);
  29         TEST(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION);
  30
  31     /* Scroll with invalid update rect pointer */
  32         TEST(ScrollDC(hDC, 50, 0, NULL, NULL, NULL, (PRECT)1) == 0);
  33         TEST(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION);
  34
  35     /* Scroll with a clip rect */
  36     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  37         TEST(ScrollDC(hDC, 50, 0, NULL, &rcClip, hrgn, NULL) == TRUE);
  38         TEST(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION);
  39
  40     /* Scroll with a clip rect */
  41     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  42         TEST(ScrollDC(hDC, 50, 50, NULL, &rcClip, hrgn, NULL) == TRUE);
  43         TEST(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION);
  44
  45         /* Overlap with another window */
  46         hWnd2 = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  47                             30, 160, 100, 100,
  48                             NULL, NULL, g_hInstance, 0);
  49         UpdateWindow(hWnd2);
  50
  51     /* Cleanup */
  52         ReleaseDC(hWnd, hDC);
  53     DestroyWindow(hWnd);
  54     DestroyWindow(hWnd2);
  55
  56         return APISTATUS_NORMAL;
  57 }