window_w32.cpp

这个是基于在CCS开发环境下

            trackbar->notify(pos);

        name_len = (int)strlen(trackbar->name);

        if( name_len > max_name_len )
        {
            int start_len = max_name_len*2/3;
            int end_len = max_name_len - start_len - 2;
            memcpy( pos_text, trackbar->name, start_len );
            memcpy( pos_text + start_len, "...", 3 );
            memcpy( pos_text + start_len + 3, trackbar->name + name_len - end_len, end_len + 1 );
        }
        else
        {
            memcpy( pos_text, trackbar->name, name_len + 1);
        }

        sprintf( pos_text + strlen(pos_text), "%s: %d\n", suffix, pos );
        SetWindowText( trackbar->buddy, pos_text );
    }
}


static LRESULT CALLBACK HGToolbarProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    CvWindow* window = icvWindowByHWND( hwnd );
    if(!window)
        return DefWindowProc(hwnd, uMsg, wParam, lParam);

    // Control messages processing
    switch(uMsg)
    {
    // Slider processing
    case WM_HSCROLL:
        {
            HWND slider = (HWND)lParam;
            int pos = (int)SendMessage(slider, TBM_GETPOS, 0, 0);
            CvTrackbar* trackbar = icvTrackbarByHWND( slider );

            if( trackbar )
            {
                if( trackbar->pos != pos )
                    icvUpdateTrackbar( trackbar, pos );
            }

            SetFocus( window->hwnd );
            return 0;
        }

    case WM_NCCALCSIZE:
        {
            LRESULT ret = CallWindowProc(window->toolbar.toolBarProc, hwnd, uMsg, wParam, lParam);
            int rows = (int)SendMessage(hwnd, TB_GETROWS, 0, 0);

            if(window->toolbar.rows != rows)
            {
                SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);
                CvTrackbar* trackbar = window->toolbar.first;

                for( ; trackbar != 0; trackbar = trackbar->next )
                {
                    RECT rect;
                    SendMessage(window->toolbar.toolbar, TB_GETITEMRECT,
                               (WPARAM)trackbar->id, (LPARAM)&rect);
                    MoveWindow(trackbar->hwnd, rect.left + HG_BUDDY_WIDTH, rect.top,
                               rect.right - rect.left - HG_BUDDY_WIDTH,
                               rect.bottom - rect.top, FALSE);
                    MoveWindow(trackbar->buddy, rect.left, rect.top,
                               HG_BUDDY_WIDTH, rect.bottom - rect.top, FALSE);
                }
                window->toolbar.rows = rows;
            }
            return ret;
        }
    }

    return CallWindowProc(window->toolbar.toolBarProc, hwnd, uMsg, wParam, lParam);
}


CV_IMPL void
cvDestroyAllWindows(void)
{
    CvWindow* window = hg_windows;

    while( window )
    {
        HWND mainhWnd = window->frame;
        HWND hwnd = window->hwnd;
        window = window->next;

        SendMessage( hwnd, WM_CLOSE, 0, 0 );
        SendMessage( mainhWnd, WM_CLOSE, 0, 0 );
    }
}


CV_IMPL int
cvWaitKey( int delay )
{
    int time0 = GetTickCount();

    for(;;)
    {
        CvWindow* window;
        MSG message;
        int is_processed = 0;

        if( (delay > 0 && abs((int)(GetTickCount() - time0)) >= delay) || hg_windows == 0 )
            return -1;

        if( delay <= 0 )
            GetMessage(&message, 0, 0, 0);
        else if( PeekMessage(&message, 0, 0, 0, PM_REMOVE) == FALSE )
        {
            Sleep(1);
            continue;
        }

        for( window = hg_windows; window != 0 && is_processed == 0; window = window->next )
        {
            if( window->hwnd == message.hwnd || window->frame == message.hwnd )
            {
                is_processed = 1;
                switch(message.message)
                {
                case WM_DESTROY:
                case WM_CHAR:
                    DispatchMessage(&message);
                    return (int)message.wParam;

                case WM_KEYDOWN:
                    TranslateMessage(&message);
                default:
                    DispatchMessage(&message);
                    is_processed = 1;
                    break;
                }
            }
        }

        if( !is_processed )
        {
            TranslateMessage(&message);
            DispatchMessage(&message);
        }
    }
}


static CvTrackbar*
icvFindTrackbarByName( const CvWindow* window, const char* name )
{
    CvTrackbar* trackbar = window->toolbar.first;

    for( ; trackbar != 0 && strcmp( trackbar->name, name ) != 0; trackbar = trackbar->next )
        ;

    return trackbar;
}


typedef struct
{
    UINT cbSize;
    DWORD dwMask;
    int idCommand;
    int iImage;
    BYTE fsState;
    BYTE fsStyle;
    WORD cx;
    DWORD lParam;
    LPSTR pszText;
    int cchText;
}
ButtonInfo;


CV_IMPL int
cvCreateTrackbar( const char* trackbar_name, const char* window_name,
                  int* val, int count, CvTrackbarCallback on_notify )
{
    int result = 0;

    CV_FUNCNAME( "cvCreateTrackbar" );

    __BEGIN__;

    char slider_name[32];
    CvWindow* window = 0;
    CvTrackbar* trackbar = 0;
    int pos = 0;

    if( !window_name || !trackbar_name )
        CV_ERROR( CV_StsNullPtr, "NULL window or trackbar name" );

    if( count <= 0 )
        CV_ERROR( CV_StsOutOfRange, "Bad trackbar maximal value" );

    window = icvFindWindowByName(window_name);
    if( !window )
        EXIT;

    trackbar = icvFindTrackbarByName(window,trackbar_name);
    if( !trackbar )
    {
        TBBUTTON tbs;
        ButtonInfo tbis;
        RECT rect;
        int bcount;
        int len = (int)strlen( trackbar_name );

        // create toolbar if it is not created yet
        if( !window->toolbar.toolbar )
        {
            const int default_height = 30;

            window->toolbar.toolbar = CreateToolbarEx(
                    window->frame, WS_CHILD | CCS_TOP | TBSTYLE_WRAPABLE,
                    1, 0, 0, 0, 0, 0, 16, 20, 16, 16, sizeof(TBBUTTON));
            GetClientRect(window->frame, &rect);
            MoveWindow( window->toolbar.toolbar, 0, 0,
                        rect.right - rect.left, default_height, TRUE);
            SendMessage(window->toolbar.toolbar, TB_AUTOSIZE, 0, 0);
            ShowWindow(window->toolbar.toolbar, SW_SHOW);

            window->toolbar.first = 0;
            window->toolbar.pos = 0;
            window->toolbar.rows = 0;
            window->toolbar.toolBarProc =
                (WNDPROC)icvGetWindowLongPtr(window->toolbar.toolbar, CV_WNDPROC);

            icvUpdateWindowPos(window);

            // Subclassing from toolbar
            icvSetWindowLongPtr(window->toolbar.toolbar, CV_WNDPROC, HGToolbarProc);
            icvSetWindowLongPtr(window->toolbar.toolbar, CV_USERDATA, window);
        }

        /* Retrieve current buttons count */
        bcount = (int)SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);

        if(bcount > 1)
        {
            /* If this is not the first button then we need to
            separate it from the previous one */
            tbs.iBitmap = 0;
            tbs.idCommand = bcount; // Set button id to it's number
            tbs.iString = 0;
            tbs.fsStyle = TBSTYLE_SEP;
            tbs.fsState = TBSTATE_ENABLED;
            SendMessage(window->toolbar.toolbar, TB_ADDBUTTONS, 1, (LPARAM)&tbs);

            // Retrieve current buttons count
            bcount = (int)SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);
        }

        /* Add a button which we're going to cover with the slider */
        tbs.iBitmap = 0;
        tbs.idCommand = bcount; // Set button id to it's number
        tbs.fsState = TBSTATE_ENABLED;
#if 0/*!defined WIN64 && !defined EM64T*/
        tbs.fsStyle = 0;
        tbs.iString = 0;
#else
#ifndef TBSTYLE_AUTOSIZE
#define TBSTYLE_AUTOSIZE        0x0010
#define TBSTYLE_GROUP           0x0004
#endif
        //tbs.fsStyle = TBSTYLE_AUTOSIZE;
        tbs.fsStyle = TBSTYLE_GROUP;
        tbs.iString = (INT_PTR)trackbar_text;
#endif
        SendMessage(window->toolbar.toolbar, TB_ADDBUTTONS, 1, (LPARAM)&tbs);

        /* Adjust button size to the slider */
        tbis.cbSize = sizeof(tbis);
        tbis.dwMask = TBIF_SIZE;

        GetClientRect(window->hwnd, &rect);
        tbis.cx = (unsigned short)(rect.right - rect.left);

        SendMessage(window->toolbar.toolbar, TB_SETBUTTONINFO,
            (WPARAM)tbs.idCommand, (LPARAM)&tbis);

        /* Get button position */
        SendMessage(window->toolbar.toolbar, TB_GETITEMRECT,
            (WPARAM)tbs.idCommand, (LPARAM)&rect);

        /* Create a slider */
        trackbar = (CvTrackbar*)cvAlloc( sizeof(CvTrackbar) + len + 1 );
        trackbar->signature = CV_TRACKBAR_MAGIC_VAL;
        trackbar->notify = 0;
        trackbar->parent = window;
        trackbar->pos = 0;
        trackbar->data = 0;
        trackbar->id = bcount;
        trackbar->next = window->toolbar.first;
        trackbar->name = (char*)(trackbar + 1);
        memcpy( trackbar->name, trackbar_name, len + 1 );
        window->toolbar.first = trackbar;

        sprintf(slider_name, "Trackbar%p", val);
        trackbar->hwnd = CreateWindowEx(0, TRACKBAR_CLASS, slider_name,
                            WS_CHILD | WS_VISIBLE | TBS_AUTOTICKS |
                            TBS_FIXEDLENGTH | TBS_HORZ | TBS_BOTTOM,
                            rect.left + HG_BUDDY_WIDTH, rect.top,
                            rect.right - rect.left - HG_BUDDY_WIDTH,
                            rect.bottom - rect.top, window->toolbar.toolbar,
                            (HMENU)(size_t)bcount, hg_hinstance, 0);

        sprintf(slider_name,"Buddy%p", val);
        trackbar->buddy = CreateWindowEx(0, "STATIC", slider_name,
                            WS_CHILD | SS_RIGHT,
                            rect.left, rect.top,
                            HG_BUDDY_WIDTH, rect.bottom - rect.top,
                            window->toolbar.toolbar, 0, hg_hinstance, 0);

        icvSetWindowLongPtr( trackbar->hwnd, CV_USERDATA, trackbar );

        /* Minimize the number of rows */
        SendMessage( window->toolbar.toolbar, TB_SETROWS,
                     MAKEWPARAM(1, FALSE), (LPARAM)&rect );
    }
    else
    {
        trackbar->data = 0;
        trackbar->notify = 0;
    }

    trackbar->maxval = count;

    /* Adjust slider parameters */
    SendMessage(trackbar->hwnd, TBM_SETRANGE, (WPARAM)TRUE, (LPARAM)MAKELONG(0, count));
    SendMessage(trackbar->hwnd, TBM_SETTICFREQ, (WPARAM)1, (LPARAM)0 );
    if( val )
        pos = *val;

    SendMessage(trackbar->hwnd, TBM_SETPOS, (WPARAM)TRUE, (LPARAM)pos );
    SendMessage(window->toolbar.toolbar, TB_AUTOSIZE, 0, 0);

    trackbar->pos = -1;
    icvUpdateTrackbar( trackbar, pos );
    ShowWindow( trackbar->buddy, SW_SHOW );
    ShowWindow( trackbar->hwnd, SW_SHOW );

    trackbar->notify = on_notify;
    trackbar->data = val;

    /* Resize the window to reflect the toolbar resizing*/
    icvUpdateWindowPos(window);

    result = 1;

    __END__;

    return result;
}


CV_IMPL void
cvSetMouseCallback( const char* window_name, CvMouseCallback on_mouse, void* param )
{
    CV_FUNCNAME( "cvSetMouseCallback" );

    __BEGIN__;

    CvWindow* window = 0;

    if( !window_name )
        CV_ERROR( CV_StsNullPtr, "NULL window name" );

    window = icvFindWindowByName(window_name);
    if( !window )
        EXIT;

    window->on_mouse = on_mouse;
    window->on_mouse_param = param;

    __END__;
}


CV_IMPL int cvGetTrackbarPos( const char* trackbar_name, const char* window_name )
{
    int pos = -1;

    CV_FUNCNAME( "cvGetTrackbarPos" );

    __BEGIN__;

    CvWindow* window;
    CvTrackbar* trackbar = 0;

    if( trackbar_name == 0 || window_name == 0 )
        CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" );

    window = icvFindWindowByName( window_name );
    if( window )
        trackbar = icvFindTrackbarByName( window, trackbar_name );

    if( trackbar )
        pos = trackbar->pos;

    __END__;

    return pos;
}


CV_IMPL void cvSetTrackbarPos( const char* trackbar_name, const char* window_name, int pos )
{
    CV_FUNCNAME( "cvSetTrackbarPos" );

    __BEGIN__;

    CvWindow* window;
    CvTrackbar* trackbar = 0;

    if( trackbar_name == 0 || window_name == 0 )
        CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" );

    window = icvFindWindowByName( window_name );
    if( window )
        trackbar = icvFindTrackbarByName( window, trackbar_name );

    if( trackbar )
    {
        if( pos < 0 )
            pos = 0;

        if( pos > trackbar->maxval )
            pos = trackbar->maxval;

        SendMessage( trackbar->hwnd, TBM_SETPOS, (WPARAM)TRUE, (LPARAM)pos );
        icvUpdateTrackbar( trackbar, pos );
    }

    __END__;
}


CV_IMPL void* cvGetWindowHandle( const char* window_name )
{
    void* hwnd = 0;

    CV_FUNCNAME( "cvGetWindowHandle" );

    __BEGIN__;

    CvWindow* window;

    if( window_name == 0 )
        CV_ERROR( CV_StsNullPtr, "NULL window name" );

    window = icvFindWindowByName( window_name );
    if( window )
        hwnd = (void*)window->hwnd;

    __END__;

    return hwnd;
}


CV_IMPL const char* cvGetWindowName( void* window_handle )
{
    const char* window_name = "";

    CV_FUNCNAME( "cvGetWindowName" );

    __BEGIN__;

    CvWindow* window;

    if( window_handle == 0 )
        CV_ERROR( CV_StsNullPtr, "NULL window" );

    window = icvWindowByHWND( (HWND)window_handle );
    if( window )
        window_name = window->name;

    __END__;

    return window_name;
}



CV_IMPL void
cvSetPreprocessFuncWin32(int (__cdecl *on_preprocess)(HWND, UINT, WPARAM, LPARAM, int*))
{
    if(on_preprocess)
        hg_on_preprocess = on_preprocess;
    else
        assert(on_preprocess);
}

CV_IMPL void
cvSetPostprocessFuncWin32(int (__cdecl *on_postprocess)(HWND, UINT, WPARAM, LPARAM, int*))
{
    if(on_postprocess)
        hg_on_postprocess = on_postprocess;
    else
        assert(on_postprocess);
}

#endif //WIN32