My YUV player MFC small Note: Non-modal dialog box creation and inter-window transfer value

YUV player, display Interface (main window) and set interface separation, all parameters are in the Setting sub-window settings, it is necessary to implement parameter transfer in the main window and sub-window. Here's how.

1.

To define a child window variable in the main window Cyuvplayerdlg class:

csettingdlg* M_psettingdlg;

and set it to null at initialization time:

M_psettingdlg = NULL;

It is simpler to display a child window, primarily to request a resource, call the CREATE function, and specify the window ID. The code is as follows:

void Cyuvplayerdlg::showsettingwindow ()
{
    //Non-modal dialog box
    if (M_psettingdlg = = NULL)
    {
        M_psettingdlg = New Csettingdlg ();
        M_psettingdlg->create (idd_dialog_setting, this);
    }

    M_psettingdlg->showwindow (sw_show);
}

Exit or destructor to free resources:

    if (M_psettingdlg! = NULL)
    {
        delete m_psettingdlg;
        M_psettingdlg = NULL;
    }

The following implements the parameter passing.

Define the main window variable and assign a value in the Csettingdlg class:

Cyuvplayerdlg *m_pparentwnd; Window parameter passing

void Setparentwnd (cyuvplayerdlg* pWnd) {m_pparentwnd = pWnd;}

Use M_pparentwnd to access the main window function when the child window needs to proactively pass parameters to the main window. Such as:

void cyuvplayerdlg::setparentparameters (int width, int height, int fps, int fmt, BOOL loop)
{
    m_nwidth = Width;
  m_nheight = height;
    M_nfps = fps;
    M_nyuvformat = FMT;
    M_floop = loop;

    Restore the original state
    if (! IsOpen ()) return;

    Showopenedframe ();
}

The value of the child window is then uploaded to the main window. A similar approach is used when the main window needs to take the subwindow data. The following are the functions of the child window:

    void Setparameterstoparentwnd (int& width, int& height, int& fps, int& fmt, bool& Loop)
    {
        width = m_nwidth;
        Height = m_nheight;
        fps = M_nfps;
        FMT = M_nyuvformat;
        loop = M_floop;
    }

When the main window needs a subwindow parameter, such as initializing the setting window during the initialization of the main window, get the playback parameters, the code is as follows:

	Initialize the Settings  dialog box
    if (M_psettingdlg = = NULL)
    {
        M_psettingdlg = new Csettingdlg ();
        M_psettingdlg->create (idd_dialog_setting, this);
        M_psettingdlg->setparentwnd (this);
        Pass the value of the child window to this window
        M_psettingdlg->setparameterstoparentwnd (m_nwidth, M_nheight, M_nfps, M_nyuvformat, M_fLoop);
    }

Li Yu 2015.8.15