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 <stdio.h>
   9 #include <wine/test.h>
  10 #include <windows.h>
  11
  12 void Test_ScrollDC()
  13 {
  14         HWND hWnd, hWnd2;
  15         HDC hDC;
  16         HRGN hrgn;
  17         RECT rcClip;
  18         int iResult;
  19
  20         /* Create a window */
  21         hWnd = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  22                             100, 100, 100, 100,
  23                             NULL, NULL, 0, 0);
  24         UpdateWindow(hWnd);
  25         hDC = GetDC(hWnd);
  26
  27         /* Test that no update region is there */
  28         hrgn = CreateRectRgn(0,0,0,0);
  29         iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
  30         ok (iResult == NULLREGION, "\n");
  31
  32     /* Test normal scrolling */
  33         ok(ScrollDC(hDC, 0, 0, NULL, NULL, hrgn, NULL) == TRUE, "\n");
  34
  35     /* Scroll with invalid update region */
  36         DeleteObject(hrgn);
  37         ok(ScrollDC(hDC, 50, 0, NULL, NULL, hrgn, NULL) == FALSE, "\n");
  38         hrgn = CreateRectRgn(0,0,0,0);
  39         ok(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION, "\n");
  40
  41     /* Scroll with invalid update rect pointer */
  42         ok(ScrollDC(hDC, 50, 0, NULL, NULL, NULL, (PRECT)1) == 0, "\n");
  43         ok(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION, "\n");
  44
  45     /* Scroll with a clip rect */
  46     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  47         ok(ScrollDC(hDC, 50, 0, NULL, &rcClip, hrgn, NULL) == TRUE, "\n");
  48         ok(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION, "\n");
  49
  50     /* Scroll with a clip rect */
  51     rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
  52         ok(ScrollDC(hDC, 50, 50, NULL, &rcClip, hrgn, NULL) == TRUE, "\n");
  53         ok(GetUpdateRgn(hWnd, hrgn, FALSE) == NULLREGION, "\n");
  54
  55         /* Overlap with another window */
  56         hWnd2 = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  57                             30, 160, 100, 100,
  58                             NULL, NULL, 0, 0);
  59         UpdateWindow(hWnd2);
  60
  61     /* Cleanup */
  62         ReleaseDC(hWnd, hDC);
  63     DestroyWindow(hWnd);
  64     DestroyWindow(hWnd2);
  65
  66 }
  67
  68 START_TEST(ScrollDC)
  69 {
  70     Test_ScrollDC();
  71 }
  72