Resource for Source: C/C++/Resource for Source - C-C++.iso/misc_src/jfklib/windows.cpp

C/C++ Source or Header | 1995-11-01 | 4.7 KB | 262 lines

/*
    WINDOWS.CPP - (C) 1990 by Joachim Kainz 'On a mission from Bhudda'
*/
    #include "windows.hpp"
    #include <string.h>

    WORD     WINDOW::wCount            = 0;
    FARPROC2 WINDOW::lpFnOOPWndProc = (FARPROC2) NULL;
    MSGLOOP  WINDOW::msg;

    static BOOL RegisterClass (
                    WORD     wStyle,
                    HICON     hCursor,
                    HCURSOR  hIcon,
                    HBRUSH     hBackground,
                    WORD     wClsExtra,
                    WORD     wWndExtra,
                    LPSTR     lpClass,
                    FARPROC2 lpFnProc
                );

    EXPORT WINDOW::WINDOW (
                WORD        wStyle,
                HCURSOR        hCursor,
                HICON        hIcon,
                HBRUSH        hBackground,
                WORD        wClsExtra,
                WORD        wWndExtra,
                LPSTR        lpClass,
                FARPROC2    lpFnProc
    ) {
        hWnd = NULL;

        RegisterClass (
            wStyle,
            hCursor,
            hIcon,
            hBackground,
            wClsExtra,
            wWndExtra,
            lpClass,
            lpFnProc
        );
    }

    EXPORT WINDOW::WINDOW (
                int            nCmdShow,
                int            x,
                int            y,
                int            cx,
                int            cy,
                long        lStyle,
                LPSTR       lpName,
                HANDLE        hMenu,
                HANDLE        hParent,
                long        lExStyle,
                WORD        wStyle,
                HCURSOR        hCursor,
                HICON        hIcon,
                HBRUSH        hBackground,
                WORD        wClsExtra,
                WORD        wWndExtra,
                LPSTR        lpParam,
                LPSTR        lpClass,
                FARPROC2    lpFnProc
    ) {
        hWnd = NULL;

        if (
            !RegisterClass (
                wStyle,
                hCursor,
                hIcon,
                hBackground,
                wClsExtra,
                wWndExtra,
                lpClass,
                lpFnProc
             )
        )
            return;

        CREATESTRUCT cs;

        cs.lpCreateParams    = lpParam;
        cs.hInstance        = GetInstance ();
        cs.hMenu            = hMenu;
        cs.hwndParent        = hParent;
        cs.cy                = cy;
        cs.cx                = cx;
        cs.y                = y;
        cs.x                = x;
        cs.style            = lStyle;
        cs.lpszName            = lpName;
        cs.lpszClass        = lpClass;
        cs.dwExStyle        = lExStyle;

        hWnd = CreateWindowEx (
                    cs.dwExStyle,
                    cs.lpszClass,
                    cs.lpszName,
                    cs.style,
                    cs.x,
                    cs.y,
                    cs.cx,
                    cs.cy,
                    cs.hwndParent,
                    cs.hMenu,
                    cs.hInstance,
                    cs.lpCreateParams
               );

        SetWindowLong (GetWindowHandle (), 0, (long) this);

        lpDefWndProc =
                (FARPROC2) SetWindowLong (
                                GetWindowHandle (),
                                GWL_WNDPROC,
                                (long) GetOOPWndProc ()
                           );
        SendMessage    (self, WM_CREATE, NULL, (long) &cs);

        if (nCmdShow != SW_HIDE)
            ShowWindow(GetWindowHandle (), nCmdShow);
    }

    BOOL RegisterClass (
            WORD     wStyle,
            HICON     hCursor,
            HCURSOR  hIcon,
            HBRUSH     hBackground,
            WORD     wClsExtra,
            WORD     wWndExtra,
            LPSTR     lpClass,
            FARPROC2 lpFnProc
         )
    {
        WNDCLASS wc;

        if (GetClassInfo (GetInstance (), lpClass, &wc))
            return TRUE;

        wc.style        = wStyle;
        wc.lpfnWndProc    = lpFnProc;
        wc.cbClsExtra    = wClsExtra;
        wc.cbWndExtra    = wWndExtra+sizeof (long); // Room for Pointer to
        wc.hInstance    = GetInstance ();           // the instance
        wc.hIcon        = hIcon;
        wc.hCursor        = hCursor;
        wc.hbrBackground= hBackground;
        wc.lpszMenuName    = NULL;
        wc.lpszClassName= lpClass;

        return RegisterClass (&wc);
    }

    EXPORT WINDOW::~WINDOW()
    {
        if(!GetWindowHandle ())
            if(IsWindow(GetWindowHandle ()))
                DestroyWindow(GetWindowHandle ());

        if (!GetCount ())
            FreeProcInstance ((FARPROC) GetOOPWndProc ());
    }

    int EXPORT MsgLoop (const WINDOW & wnd)
    {
        return wnd.msg.Loop ();
    }

    FARPROC2 WINDOW::GetOOPWndProc () const
    {
        if (!lpFnOOPWndProc)
             lpFnOOPWndProc = (FARPROC2) MakeProcInstance (
                                            (FARPROC) DefOOPWndProc,
                                            GetInstance ()
                                         );

        return lpFnOOPWndProc;
    }

    void EXPORT ShowWindow  (const WINDOW &wnd, int nShow)
    {
        ::ShowWindow (wnd.GetWindowHandle (), nShow);
    }

    BOOL EXPORT IsWindow (const WINDOW &wnd)
    {
        if (!wnd.GetWindowHandle ())
            return FALSE;

        return IsWindow (wnd.GetWindowHandle ());
    }

    long EXPORT SendMessage (
                 const WINDOW &wnd,
                 WORD           wMsg,
                 WORD           wParam,
                 LONG           lParam
                )
    {
        return SendMessage (
                wnd.GetWindowHandle (),
                wMsg,
                wParam,
                lParam
               );
    }

    long EXPORT PostMessage (
                    const WINDOW &wnd,
                    WORD           wMsg,
                    WORD           wParam,
                    LONG           lParam
                )
    {
        return PostMessage (
                wnd.GetWindowHandle (),
                wMsg,
                wParam,
                lParam
               );
    }

    void EXPORT SetWindowText (const WINDOW &wnd, LPSTR lpText)
    {
        if (HIWORD (lpText)) {

            SetWindowText (
                wnd.GetWindowHandle (),
                lpText
            );

            return;

        }

        PSTR pText;

        for (WORD wLen=64;; wLen*=2) {

            pText = new char [wLen];

            if (
                LoadString (
                    GetInstance (),
                    LOWORD (lpText),
                    pText,
                    wLen
                ) < wLen-1
            )
                break;

            delete pText;

        }

        SetWindowText (wnd.GetWindowHandle (), pText);

        delete pText;
    }