ScrollDC.c File Reference

#include "precomp.h"

Include dependency graph for ScrollDC.c:

Go to the source code of this file.

Functions
void	Test_ScrollDC ()
	START_TEST (ScrollDC)

Function Documentation

START_TEST()

START_TEST

(

ScrollDC

)

Definition at line 71 of file ScrollDC.c.

{
    Test_ScrollDC();
}

Test_ScrollDC()

void Test_ScrollDC

(

)

Definition at line 10 of file ScrollDC.c.

{
    HWND hWnd, hWnd2;
    HDC hDC;
    HRGN hrgn;
    RECT rcClip;
    int iResult;

    /* Create a window */
    hWnd = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                        100, 100, 100, 100,
                        NULL, NULL, 0, 0);
    UpdateWindow(hWnd);
    hDC = GetDC(hWnd);

    /* Test that no update region is there */
    hrgn = CreateRectRgn(0,0,0,0);
    iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
    ok (iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);

    /* Test normal scrolling */
    ok(ScrollDC(hDC, 0, 0, NULL, NULL, hrgn, NULL) == TRUE, "ScrollDC failed\n");

    /* Scroll with invalid update region */
    DeleteObject(hrgn);
    ok(ScrollDC(hDC, 50, 0, NULL, NULL, (HRGN)0x12345678, NULL) == FALSE, "ScrollDC successed\n");
    ok(ScrollDC(hDC, 50, 0, NULL, NULL, hrgn, NULL) == FALSE, "ScrollDC successed\n");
    hrgn = CreateRectRgn(0,0,0,0);
    iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
    ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);

    /* Scroll with invalid update rect pointer */
    ok(ScrollDC(hDC, 50, 0, NULL, NULL, NULL, (PRECT)1) == FALSE, "ScrollDC failed\n");
    iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
    ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);

    /* Scroll with a clip rect */
    rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
    ok(ScrollDC(hDC, 50, 0, NULL, &rcClip, hrgn, NULL) == TRUE, "ScrollDC failed\n");
    iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
    ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);

    /* Scroll with a clip rect */
    rcClip.left = 50; rcClip.top = 0; rcClip.right = 100; rcClip.bottom = 100;
    ok(ScrollDC(hDC, 50, 50, NULL, &rcClip, hrgn, NULL) == TRUE, "ScrollDC failed\n");
    iResult = GetUpdateRgn(hWnd, hrgn, FALSE);
    ok(iResult == NULLREGION, "Expected NULLREGION, got %d\n", iResult);

    /* Overlap with another window */
    hWnd2 = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                        30, 160, 100, 100,
                        NULL, NULL, 0, 0);
    UpdateWindow(hWnd2);

    /* Cleanup */
    ReleaseDC(hWnd, hDC);
    DestroyWindow(hWnd);
    DestroyWindow(hWnd2);

}

Referenced by START_TEST().