dialog.c

winNT技术操作系统,国外开放的原代码和LIUX一样

                }
            }
            hwndNext = GetWindow( hwndControl, GW_CHILD );
        }
        else hwndNext = 0;

        if (!hwndNext) hwndNext = GetWindow( hwndControl, GW_HWNDNEXT );

        while (!hwndNext && hwndControl)
        {
            hwndControl = GetParent( hwndControl );
            if (hwndControl == hwndDlg)
            {
                if(hwnd==hwndDlg)   /* prevent endless loop */
                {
                    hwndNext=hwnd;
                    break;
                }
                hwndNext = GetWindow( hwndDlg, GW_CHILD );
            }
            else
                hwndNext = GetWindow( hwndControl, GW_HWNDNEXT );
        }
        hwndControl = hwndNext;
    }
    while (hwndControl && (hwndControl != hwnd));

    return FALSE;
}

 /***********************************************************************
 *           DIALOG_DoDialogBox
 */
INT DIALOG_DoDialogBox( HWND hwnd, HWND owner )
{
    DIALOGINFO * dlgInfo;
    MSG msg;
    INT retval;
    HWND ownerMsg = GetAncestor( owner, GA_ROOT );
    BOOL bFirstEmpty;

    if (!(dlgInfo = GETDLGINFO(hwnd))) return -1;

    bFirstEmpty = TRUE;
    if (!(dlgInfo->flags & DF_END)) /* was EndDialog called in WM_INITDIALOG ? */
    {
        for (;;)
        {
            if (!PeekMessageW( &msg, 0, 0, 0, PM_REMOVE ))
            {
                if (bFirstEmpty)
                {
                    /* ShowWindow the first time the queue goes empty */
                    ShowWindow( hwnd, SW_SHOWNORMAL );
                    bFirstEmpty = FALSE;
                }
                if (!(GetWindowLongW( hwnd, GWL_STYLE ) & DS_NOIDLEMSG))
               {
                    /* No message present -> send ENTERIDLE and wait */
                    SendMessageW( ownerMsg, WM_ENTERIDLE, MSGF_DIALOGBOX, (LPARAM)hwnd );
                }
                if (!GetMessageW( &msg, 0, 0, 0 )) break;
            }

            if (!IsWindow( hwnd )) return -1;
            if (!(dlgInfo->flags & DF_END) && !IsDialogMessageW( hwnd, &msg))
            {
                TranslateMessage( &msg );
                DispatchMessageW( &msg );
            }
            if (dlgInfo->flags & DF_END) break;
        }
    }
    if (dlgInfo->flags & DF_OWNERENABLED) DIALOG_EnableOwner( owner );
    retval = dlgInfo->idResult;
    DestroyWindow( hwnd );
    return retval;
}

 /***********************************************************************
 *           DIALOG_ParseTemplate32
 *
 * Fill a DLG_TEMPLATE structure from the dialog template, and return
 * a pointer to the first control.
 */
static LPCSTR DIALOG_ParseTemplate32( LPCSTR template, DLG_TEMPLATE * result )
{
    const WORD *p = (const WORD *)template;
    WORD signature;
    WORD dlgver;

    signature = GET_WORD(p); p++;
    dlgver = GET_WORD(p); p++;

    if (signature == 1 && dlgver == 0xffff)  /* DIALOGEX resource */
    {
        result->dialogEx = TRUE;
        result->helpId   = GET_DWORD(p); p += 2;
        result->exStyle  = GET_DWORD(p); p += 2;
        result->style    = GET_DWORD(p); p += 2;
    }
    else
    {
        result->style = GET_DWORD(p - 2);
        result->dialogEx = FALSE;
        result->helpId   = 0;
        result->exStyle  = GET_DWORD(p); p += 2;
    }
    result->nbItems = GET_WORD(p); p++;
    result->x       = GET_WORD(p); p++;
    result->y       = GET_WORD(p); p++;
    result->cx      = GET_WORD(p); p++;
    result->cy      = GET_WORD(p); p++;

    /* Get the menu name */

    switch(GET_WORD(p))
    {
        case 0x0000:
            result->menuName = NULL;
            p++;
            break;
        case 0xffff:
            result->menuName = (LPCWSTR)(UINT)GET_WORD( p + 1 );
            p += 2;
            break;
        default:
            result->menuName = (LPCWSTR)p;
            p += wcslen( result->menuName ) + 1;
            break;
    }

    /* Get the class name */

    switch(GET_WORD(p))
    {
        case 0x0000:
            result->className = DIALOG_CLASS_ATOMW;
            p++;
            break;
        case 0xffff:
            result->className = (LPCWSTR)(UINT)GET_WORD( p + 1 );
            p += 2;
            break;
        default:
            result->className = (LPCWSTR)p;
            p += wcslen( result->className ) + 1;
            break;
    }

    /* Get the window caption */

    result->caption = (LPCWSTR)p;
    p += wcslen( result->caption ) + 1;

    /* Get the font name */

    result->pointSize = 0;
    result->weight = FW_DONTCARE;
    result->italic = FALSE;
    result->faceName = NULL;

    if (result->style & DS_SETFONT)
    {
        result->pointSize = GET_WORD(p);
        p++;
        if (result->dialogEx)
        {
            result->weight = GET_WORD(p); p++;
            result->italic = LOBYTE(GET_WORD(p)); p++;
        }
        result->faceName = (LPCWSTR)p;
        p += wcslen( result->faceName ) + 1;
    }

    /* First control is on dword boundary */
    return (LPCSTR)((((int)p) + 3) & ~3);
}

 /***********************************************************************
 *           DIALOG_CreateIndirect
 *       Creates a dialog box window
 *
 *       modal = TRUE if we are called from a modal dialog box.
 *       (it's more compatible to do it here, as under Windows the owner
 *       is never disabled if the dialog fails because of an invalid template)
 */
static HWND DIALOG_CreateIndirect( HINSTANCE hInst, LPCVOID dlgTemplate,
                                   HWND owner, DLGPROC dlgProc, LPARAM param,
                                   BOOL unicode, BOOL modal )
{
    HWND hwnd;
    RECT rect;
    DLG_TEMPLATE template;
    DIALOGINFO * dlgInfo = NULL;
    DWORD units = GetDialogBaseUnits();
    BOOL ownerEnabled = TRUE;
    HMENU hMenu = 0;
    HFONT hUserFont = 0;
    UINT flags = 0;
    UINT xBaseUnit = LOWORD(units);
    UINT yBaseUnit = HIWORD(units);

      /* Parse dialog template */

    if (!dlgTemplate) return 0;
    dlgTemplate = DIALOG_ParseTemplate32( dlgTemplate, &template );

      /* Load menu */

    if (template.menuName) hMenu = LoadMenuW( hInst, template.menuName );

      /* Create custom font if needed */

    if (template.style & DS_SETFONT)
    {
          /* We convert the size to pixels and then make it -ve.  This works
           * for both +ve and -ve template.pointSize */
        HDC dc;
        int pixels;
        dc = GetDC(0);
        pixels = MulDiv(template.pointSize, GetDeviceCaps(dc , LOGPIXELSY), 72);
        hUserFont = CreateFontW( -pixels, 0, 0, 0, template.weight,
                                          template.italic, FALSE, FALSE, DEFAULT_CHARSET, 0, 0,
                                          PROOF_QUALITY, FF_DONTCARE,
                                          template.faceName );
        if (hUserFont)
        {
            SIZE charSize;
            HFONT hOldFont = SelectObject( dc, hUserFont );
            charSize.cx = GdiGetCharDimensions( dc, NULL, &charSize.cy );
            if (charSize.cx)
            {
                xBaseUnit = charSize.cx;
                yBaseUnit = charSize.cy;
            }
            SelectObject( dc, hOldFont );
        }
        ReleaseDC(0, dc);
        TRACE("units = %d,%d\n", xBaseUnit, yBaseUnit );
    }

    /* Create dialog main window */

    rect.left = rect.top = 0;
    rect.right = MulDiv(template.cx, xBaseUnit, 4);
    rect.bottom =  MulDiv(template.cy, yBaseUnit, 8);
    if (template.style & WS_CHILD)
        template.style &= ~(WS_CAPTION|WS_SYSMENU);
    if (template.style & DS_MODALFRAME)
        template.exStyle |= WS_EX_DLGMODALFRAME;
    if (template.style & DS_CONTROL)
        template.exStyle |= WS_EX_CONTROLPARENT;
    AdjustWindowRectEx( &rect, template.style, (hMenu != 0), template.exStyle );
    rect.right -= rect.left;
    rect.bottom -= rect.top;

    if (template.x == CW_USEDEFAULT16)
    {
        rect.left = rect.top = CW_USEDEFAULT;
    }
    else
    {
        if (template.style & DS_CENTER)
        {
            rect.left = (GetSystemMetrics(SM_CXSCREEN) - rect.right) / 2;
            rect.top = (GetSystemMetrics(SM_CYSCREEN) - rect.bottom) / 2;
        }
        else
        {
            rect.left += MulDiv(template.x, xBaseUnit, 4);
            rect.top += MulDiv(template.y, yBaseUnit, 8);
        }
        if ( !(template.style & WS_CHILD) )
        {
            INT dX, dY;

            if( !(template.style & DS_ABSALIGN) )
                ClientToScreen( owner, (POINT *)&rect );

            /* try to fit it into the desktop */

            if( (dX = rect.left + rect.right + GetSystemMetrics(SM_CXDLGFRAME)
                 - GetSystemMetrics(SM_CXSCREEN)) > 0 ) rect.left -= dX;
            if( (dY = rect.top + rect.bottom + GetSystemMetrics(SM_CYDLGFRAME)
                 - GetSystemMetrics(SM_CYSCREEN)) > 0 ) rect.top -= dY;
            if( rect.left < 0 ) rect.left = 0;
            if( rect.top < 0 ) rect.top = 0;
        }
    }

    if (modal)
    {
        ownerEnabled = DIALOG_DisableOwner( owner );
        if (ownerEnabled) flags |= DF_OWNERENABLED;
    }

    if (unicode)
    {
        hwnd = CreateWindowExW(template.exStyle, template.className, template.caption,
                               template.style & ~WS_VISIBLE,
                               rect.left, rect.top, rect.right, rect.bottom,
                               owner, hMenu, hInst, NULL );
    }
    else
    {
        LPSTR class = (LPSTR)template.className;
        LPSTR caption = (LPSTR)template.caption;

        if (HIWORD(class))
        {
            DWORD len = WideCharToMultiByte( CP_ACP, 0, template.className, -1, NULL, 0, NULL, NULL );
            class = HeapAlloc( GetProcessHeap(), 0, len );
            WideCharToMultiByte( CP_ACP, 0, template.className, -1, class, len, NULL, NULL );
        }
        if (HIWORD(caption))
        {
            DWORD len = WideCharToMultiByte( CP_ACP, 0, template.caption, -1, NULL, 0, NULL, NULL );
            caption = HeapAlloc( GetProcessHeap(), 0, len );
            WideCharToMultiByte( CP_ACP, 0, template.caption, -1, caption, len, NULL, NULL );
        }
        hwnd = CreateWindowExA(template.exStyle, class, caption,
                               template.style & ~WS_VISIBLE,
                               rect.left, rect.top, rect.right, rect.bottom,
                               owner, hMenu, hInst, NULL );
        if (HIWORD(class)) HeapFree( GetProcessHeap(), 0, class );
        if (HIWORD(caption)) HeapFree( GetProcessHeap(), 0, caption );
    }

    if (!hwnd)
    {
        if (hUserFont) DeleteObject( hUserFont );
        if (hMenu) DestroyMenu( hMenu );
        if (modal && (flags & DF_OWNERENABLED)) DIALOG_EnableOwner(owner);
        return 0;
    }

    /* moved this from the top of the method to here as DIALOGINFO structure
    will be valid only after WM_CREATE message has been handled in DefDlgProc
    All the members of the structure get filled here using temp variables */

//    dlgInfo = DIALOG_get_info( hwnd, TRUE );

    if (!(dlgInfo = HeapAlloc( GetProcessHeap(), 0, sizeof(*dlgInfo) ))) return 0;
    SETDLGINFO(hwnd, dlgInfo);

    dlgInfo->hwndFocus   = 0;
    dlgInfo->hUserFont   = hUserFont;
    dlgInfo->hMenu       = hMenu;
    dlgInfo->xBaseUnit   = xBaseUnit;
    dlgInfo->yBaseUnit   = yBaseUnit;
    dlgInfo->idResult    = 0;
    dlgInfo->flags       = flags;
//    dlgInfo->hDialogHeap = 0;

    if (template.helpId) SetWindowContextHelpId( hwnd, template.helpId );

    if (unicode) SetWindowLongPtrW( hwnd, DWLP_DLGPROC, (ULONG_PTR)dlgProc );
    else SetWindowLongPtrA( hwnd, DWLP_DLGPROC, (ULONG_PTR)dlgProc );

    if (dlgInfo->hUserFont)
        SendMessageW( hwnd, WM_SETFONT, (WPARAM)dlgInfo->hUserFont, 0 );

    /* Create controls */

    if (DIALOG_CreateControls32( hwnd, dlgTemplate, &template, hInst, unicode ))
    {
        /* Send initialisation messages and set focus */

        if (SendMessageW( hwnd, WM_INITDIALOG, (WPARAM)dlgInfo->hwndFocus, param ) &&
            ((~template.style & DS_CONTROL) || (template.style & WS_VISIBLE)))
        {
            /* By returning TRUE, app has requested a default focus assignment */
            dlgInfo->hwndFocus = GetNextDlgTabItem( hwnd, 0, FALSE);
            if( dlgInfo->hwndFocus )
                SetFocus( dlgInfo->hwndFocus );
        }

        if (template.style & WS_VISIBLE && !(GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE))
        {
           ShowWindow( hwnd, SW_SHOWNORMAL );   /* SW_SHOW doesn't always work */
        }
        return hwnd;
    }
    if (modal && ownerEnabled) DIALOG_EnableOwner(owner);
    if( IsWindow(hwnd) ) DestroyWindow( hwnd );
    return 0;
}

/***********************************************************************
 *           DEFDLG_SetFocus
 *
 * Set the focus to a control of the dialog, selecting the text if
 * the control is an edit dialog.
 */
static void DEFDLG_SetFocus( HWND hwndDlg, HWND hwndCtrl )
{
    HWND hwndPrev = GetFocus();

    if (IsChild( hwndDlg, hwndPrev ))
    {
        if (SendMessageW( hwndPrev, WM_GETDLGCODE, 0, 0 ) & DLGC_HASSETSEL)
            SendMessageW( hwndPrev, EM_SETSEL, -1, 0 );
    }
    if (SendMessageW( hwndCtrl, WM_GETDLGCODE, 0, 0 ) & DLGC_HASSETSEL)
        SendMessageW( hwndCtrl, EM_SETSEL, 0, -1 );
    SetFocus( hwndCtrl );
}

/***********************************************************************
 *           DEFDLG_SaveFocus
 */
static void DEFDLG_SaveFocus( HWND hwnd )
{
    DIALOGINFO *infoPtr;
    HWND hwndFocus = GetFocus();

    if (!hwndFocus || !IsChild( hwnd, hwndFocus )) return;
    if (!(infoPtr = GETDLGINFO(hwnd))) return;
    infoPtr->hwndFocus = hwndFocus;
    /* Remove default button */
}

/***********************************************************************
 *           DEFDLG_RestoreFocus
 */
static void DEFDLG_RestoreFocus( HWND hwnd )
{
    DIALOGINFO *infoPtr;

    if (IsIconic( hwnd )) return;
    if (!(infoPtr = GETDLGINFO(hwnd))) return;
    /* Don't set the focus back to controls if EndDialog is already called.*/
    if (infoPtr->flags & DF_END) return;
    if (!IsWindow(infoPtr->hwndFocus) || infoPtr->hwndFocus == hwnd) {
        /* If no saved focus control exists, set focus to the first visible,
           non-disabled, WS_TABSTOP control in the dialog */