mainwnd.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

                if (TreeView_HitTest(Info->hTreeView, &HitTest))
                    (void)TreeView_SelectItem(Info->hTreeView, HitTest.hItem);
            }
        }
        break;

        case TTN_GETDISPINFO:
        {
            LPTOOLTIPTEXT lpttt;
            UINT idButton;

            lpttt = (LPTOOLTIPTEXT)lParam;

            idButton = (UINT)lpttt->hdr.idFrom;
            switch (idButton)
            {
                case IDC_PROP:
                    lpttt->lpszText = MAKEINTRESOURCE(IDS_TOOLTIP_PROP);
                break;

                case IDC_REFRESH:
                    lpttt->lpszText = MAKEINTRESOURCE(IDS_TOOLTIP_REFRESH);
                break;

                case IDC_PROGHELP:
                    lpttt->lpszText = MAKEINTRESOURCE(IDS_TOOLTIP_HELP);
                break;

                case IDC_EXIT:
                    lpttt->lpszText = MAKEINTRESOURCE(IDS_TOOLTIP_EXIT);
                break;
            }
        }
        break;
    }
}


static VOID
MainWndCommand(PMAIN_WND_INFO Info,
               WORD CmdId,
               HWND hControl)
{
    UNREFERENCED_PARAMETER(hControl);

    switch (CmdId)
    {
        case IDC_PROP:
        {
            HTREEITEM hSelected = TreeView_GetSelection(Info->hTreeView);
            OpenPropSheet(Info->hTreeView,
                          hSelected);
        }
        break;

        case IDC_REFRESH:
        {
            HANDLE DevEnumThread;

            SendMessage(Info->hTool,
                        TB_SETSTATE,
                        IDC_PROP,
                        (LPARAM)MAKELONG(TBSTATE_INDETERMINATE, 0));

            EnableMenuItem(GetMenu(Info->hMainWnd), IDC_PROP, MF_GRAYED);
            EnableMenuItem(Info->hShortcutMenu, IDC_PROP, MF_GRAYED);

            /* create seperate thread to emum devices */
            DevEnumThread = CreateThread(NULL,
                                         0,
                                         DeviceEnumThread,
                                         &Info->hTreeView,
                                         0,
                                         NULL);
            if (!DevEnumThread)
            {
                DisplayString(_T("Failed to enumerate devices"));
                break;
            }

            CloseHandle(DevEnumThread);
        }
        break;

        case IDC_PROGHELP:
        {
            DisplayString(_T("Help is not yet implemented\n"));
            SetFocus(Info->hTreeView);
        }
        break;

        case IDC_EXIT:
        {
            PostMessage(Info->hMainWnd,
                        WM_CLOSE,
                        0,
                        0);
        }
        break;

        case IDC_ABOUT:
        {
            DialogBox(hInstance,
                      MAKEINTRESOURCE(IDD_ABOUTBOX),
                      Info->hMainWnd,
                      (DLGPROC)AboutDialogProc);

            SetFocus(Info->hTreeView);
        }
        break;

    }
}


static VOID CALLBACK
MainWndResize(PMAIN_WND_INFO Info,
              WORD cx,
              WORD cy)
{
    RECT rcClient, rcTool, rcStatus;
    int lvHeight, iToolHeight, iStatusHeight;

    /* Size toolbar and get height */
    SendMessage(Info->hTool, TB_AUTOSIZE, 0, 0);
    GetWindowRect(Info->hTool, &rcTool);
    iToolHeight = rcTool.bottom - rcTool.top;

    /* Size status bar and get height */
    SendMessage(Info->hStatus, WM_SIZE, 0, 0);
    GetWindowRect(Info->hStatus, &rcStatus);
    iStatusHeight = rcStatus.bottom - rcStatus.top;

    /* Calculate remaining height and size list view */
    GetClientRect(Info->hMainWnd, &rcClient);
    lvHeight = rcClient.bottom - iToolHeight - iStatusHeight;
    SetWindowPos(Info->hTreeView,
                 NULL,
                 0,
                 iToolHeight,
                 rcClient.right,
                 lvHeight,
                 SWP_NOZORDER);
}


static LRESULT CALLBACK
MainWndProc(HWND hwnd,
            UINT msg,
            WPARAM wParam,
            LPARAM lParam)
{
    PMAIN_WND_INFO Info;
    LRESULT Ret = 0;

    /* Get the window context */
    Info = (PMAIN_WND_INFO)GetWindowLongPtr(hwnd,
                                            GWLP_USERDATA);
    if (Info == NULL && msg != WM_CREATE)
    {
        goto HandleDefaultMessage;
    }

    switch(msg)
    {
        case WM_CREATE:
        {
            Info = (PMAIN_WND_INFO)(((LPCREATESTRUCT)lParam)->lpCreateParams);

            /* Initialize the main window context */
            Info->hMainWnd = hwnd;

            SetWindowLongPtr(hwnd,
                             GWLP_USERDATA,
                             (LONG_PTR)Info);

            if (!InitMainWnd(Info))
                SendMessage(hwnd, WM_CLOSE, 0, 0);

            /* Show the window */
            ShowWindow(hwnd,
                       Info->nCmdShow);

        }
        break;

        case WM_SIZE:
        {
            MainWndResize(Info,
                          LOWORD(lParam),
                          HIWORD(lParam));
        }
        break;

        case WM_NOTIFY:
        {
            OnNotify(Info, lParam);
        }
        break;

        case WM_CONTEXTMENU:
        {
            OnContext(Info, lParam);
        }
        break;

        case WM_COMMAND:
        {
            MainWndCommand(Info,
                           LOWORD(wParam),
                           (HWND)lParam);
            goto HandleDefaultMessage;
        }

        case WM_MENUSELECT:
        {
            if (Info->hStatus != NULL)
            {
                if (!MainWndMenuHint(Info,
                                     LOWORD(wParam),
                                     MainMenuHintTable,
                                     sizeof(MainMenuHintTable) / sizeof(MainMenuHintTable[0]),
                                     IDS_HINT_BLANK))
                {
                    MainWndMenuHint(Info,
                                    LOWORD(wParam),
                                    SystemMenuHintTable,
                                    sizeof(SystemMenuHintTable) / sizeof(SystemMenuHintTable[0]),
                                    IDS_HINT_BLANK);
                }
            }
        }
        break;

        case WM_ENTERMENULOOP:
        {
            Info->InMenuLoop = TRUE;
            UpdateMainStatusBar(Info);
            break;
        }

        case WM_EXITMENULOOP:
        {
            Info->InMenuLoop = FALSE;
            UpdateMainStatusBar(Info);
            break;
        }

        case WM_CLOSE:
        {
            FreeDeviceStrings(Info->hTreeView);
            DestroyMenu(Info->hShortcutMenu);
            DestroyWindow(hwnd);
        }
        break;

        case WM_DESTROY:
        {
            HeapFree(ProcessHeap,
                     0,
                     Info);
            SetWindowLongPtr(hwnd,
                             GWLP_USERDATA,
                             0);

            /* Break the message queue loop */
            PostQuitMessage(0);
        }
        break;

        default:
        {
HandleDefaultMessage:

            Ret = DefWindowProc(hwnd,
                                msg,
                                wParam,
                                lParam);
        }
        break;
    }
    return Ret;
}



HWND
CreateMainWindow(LPCTSTR lpCaption,
                 int nCmdShow)
{
    PMAIN_WND_INFO Info;
    HWND hMainWnd = NULL;

    Info = (PMAIN_WND_INFO)HeapAlloc(ProcessHeap,
                                     HEAP_ZERO_MEMORY,
                                     sizeof(MAIN_WND_INFO));

    if (Info != NULL)
    {
        Info->nCmdShow = nCmdShow;

        hMainWnd = CreateWindowEx(WS_EX_WINDOWEDGE,
                                  szMainWndClass,
                                  lpCaption,
                                  WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
                                  CW_USEDEFAULT,
                                  CW_USEDEFAULT,
                                  600,
                                  450,
                                  NULL,
                                  NULL,
                                  hInstance,
                                  Info);
        if (hMainWnd == NULL)
        {
            GetError();
            HeapFree(ProcessHeap,
                     0,
                     Info);
        }
    }

    return hMainWnd;
}

BOOL
InitMainWindowImpl(VOID)
{
    WNDCLASSEX wc = {0};

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.lpfnWndProc = MainWndProc;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance,
                        MAKEINTRESOURCE(IDI_MAIN_ICON));
    wc.hCursor = LoadCursor(NULL,
                            IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
    wc.lpszMenuName = MAKEINTRESOURCE(IDR_MAINMENU);
    wc.lpszClassName = szMainWndClass;
    wc.hIconSm = (HICON)LoadImage(hInstance,
                                  MAKEINTRESOURCE(IDI_MAIN_ICON),
                                  IMAGE_ICON,
                                  16,
                                  16,
                                  LR_SHARED);

    return RegisterClassEx(&wc) != (ATOM)0;
}


VOID
UninitMainWindowImpl(VOID)
{
    UnregisterClass(szMainWndClass,
                    hInstance);
}