mmboard.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

/////////////////////////////////////////////////////////////////////////////
// Name:        mmboard.cpp
// Purpose:     Multimedia Library sample
// Author:      Guilhem Lavaux (created from minimal by J. Smart)
// Modified by:
// Created:     13/02/2000
// RCS-ID:      $Id: mmboard.cpp,v 1.19 2006/11/07 15:32:27 VZ Exp $
// Copyright:   (c) Guilhem Lavaux
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers
#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

// ----------------------------------------------------------------------------
// ressources
// ----------------------------------------------------------------------------

// the application icon
#if !defined(__WXMSW__) && !defined(__WXPM__)
    #include "mondrian.xpm"
#endif

// include multimedia classes
#include "wx/mmedia/sndbase.h"
#ifdef __WIN32__
    #include "wx/mmedia/sndwin.h"
#endif
#ifdef __UNIX__
    #include "wx/mmedia/sndoss.h"
    #include "wx/mmedia/sndesd.h"
#endif

#include "wx/statline.h"
#include "wx/stattext.h"

// include personnal classes
#include "mmboard.h"
#include "mmbman.h"

#include "play.xpm"
#include "stop.xpm"
#include "eject.xpm"
#include "pause.xpm"

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// Main Multimedia Board frame
class MMBoardFrame : public wxFrame
{
public:
    // ctor(s)
    MMBoardFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
    // dtor
    ~MMBoardFrame();

    // event handlers
    void OnQuit(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);
    void OnOpen(wxCommandEvent& event);
    void OnPlay(wxCommandEvent& event);
    void OnStop(wxCommandEvent& event);
    void OnPause(wxCommandEvent& event);
    void OnEject(wxCommandEvent& event);
    void OnRefreshInfo(wxEvent& event);
    void OnSetPosition(wxCommandEvent& event);

    void OpenVideoWindow();
    void CloseVideoWindow();

private:
    // any class wishing to process wxWidgets events must use this macro
    DECLARE_EVENT_TABLE()

private:
    void UpdateMMedInfo();
    void UpdateInfoText();

    MMBoardFile *m_opened_file;

    wxSlider *m_positionSlider;
    wxBitmapButton *m_playButton, *m_pauseButton, *m_stopButton, *m_ejectButton;
    wxStaticText *m_fileType, *m_infoText;
    wxWindow *m_video_window;

    wxPanel *m_panel;
    wxSizer *m_sizer;

    wxTimer *m_refreshTimer;
};

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// IDs for the controls and the menu commands
enum
{
    // menu items
    MMBoard_Quit = 1,
    MMBoard_Open,
    MMBoard_About,
    MMBoard_PositionSlider,
    MMBoard_PlayButton,
    MMBoard_PauseButton,
    MMBoard_ResumeButton,
    MMBoard_StopButton,
    MMBoard_EjectButton,
    MMBoard_RefreshInfo
};

// ----------------------------------------------------------------------------
// event tables and other macros for wxWidgets
// ----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(MMBoardFrame, wxFrame)
  EVT_MENU(MMBoard_Quit,  MMBoardFrame::OnQuit)
  EVT_MENU(MMBoard_About, MMBoardFrame::OnAbout)
  EVT_MENU(MMBoard_Open, MMBoardFrame::OnOpen)
  EVT_BUTTON(MMBoard_PlayButton, MMBoardFrame::OnPlay)
  EVT_BUTTON(MMBoard_StopButton, MMBoardFrame::OnStop)
  EVT_BUTTON(MMBoard_PauseButton, MMBoardFrame::OnPause)
  EVT_BUTTON(MMBoard_EjectButton, MMBoardFrame::OnEject)
  EVT_SLIDER(MMBoard_PositionSlider, MMBoardFrame::OnSetPosition)
  EVT_CUSTOM(wxEVT_TIMER, MMBoard_RefreshInfo, MMBoardFrame::OnRefreshInfo)
END_EVENT_TABLE()

// ---------------------------------------------------------------------------
// Main board application launcher
// ---------------------------------------------------------------------------

IMPLEMENT_APP(MMBoardApp)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------

bool MMBoardApp::OnInit()
{
    // create the main application window
    MMBoardFrame *frame = new MMBoardFrame(_T("Multimedia Board"),
                                 wxPoint(50, 50), wxSize(450, 340));

    // and show it (the frames, unlike simple controls, are not shown when
    // created initially)
    frame->Show();

    m_caps = TestMultimediaCaps();

    if (!m_caps) {
      wxMessageBox(_T("Your system has no multimedia capabilities. We are exiting now."), _T("Major error !"), wxOK | wxICON_ERROR, NULL);
      return false;
    }

    wxString msg;
    msg.Printf(_T("Detected : %s%s%s"), (m_caps & MM_SOUND_OSS) ? _T("OSS ") : _T(""),
                                (m_caps & MM_SOUND_ESD) ? _T("ESD ") : _T(""),
                                (m_caps & MM_SOUND_WIN) ? _T("WIN") : _T(""));

    wxMessageBox(msg, _T("Good !"), wxOK | wxICON_INFORMATION, NULL);

    // success: wxApp::OnRun() will be called which will enter the main message
    // loop and the application will run. If we returned false here, the
    // application would exit immediately.
    return true;
}

wxUint8 MMBoardApp::TestMultimediaCaps()
{
    wxSoundStream *dev;
    wxUint8 caps;

    caps = 0;

#ifdef __WIN32__
    // We test the Windows sound support.

    dev = new wxSoundStreamWin();
    if (dev->GetError() == wxSOUND_NOERROR)
        caps |= MM_SOUND_WIN;
    delete dev;

#elif defined __UNIX__
    // We now test the ESD support

    dev = new wxSoundStreamESD();
    if (dev->GetError() == wxSOUND_NOERROR)
        caps |= MM_SOUND_ESD;
    delete dev;

    // We test the OSS (Open Sound System) support.
    // WARNING: There is a conflict between ESD and ALSA. We may be interrested
    // in disabling the auto detection of OSS is ESD has been detected.
#if 1
    if (!(caps & MM_SOUND_ESD)) {
#endif

    dev = new wxSoundStreamOSS();
    if (dev->GetError() == wxSOUND_NOERROR)
        caps |= MM_SOUND_OSS;
    delete dev;
#if 1
    }
#endif

#endif

    return caps;
}

// ----------------------------------------------------------------------------
// main frame
// ----------------------------------------------------------------------------

// frame constructor
MMBoardFrame::MMBoardFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
       : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
{
#ifdef __WXMAC__
    // we need this in order to allow the about menu relocation, since ABOUT is
    // not the default id of the about menu
    wxApp::s_macAboutMenuItemId = MMBoard_About;
#endif

    // set the frame icon
    SetIcon(wxICON(mondrian));

    // create a menu bar
    wxMenu *menuFile = new wxMenu(wxEmptyString, wxMENU_TEAROFF);

    // the "About" item should be in the help menu
    wxMenu *helpMenu = new wxMenu;
    helpMenu->Append(MMBoard_About, wxT("&About...\tCtrl-A"), wxT("Show about dialog"));

    menuFile->Append(MMBoard_Open, wxT("&Open\tAlt-O"), wxT("Open file"));
    menuFile->AppendSeparator();
    menuFile->Append(MMBoard_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));

    // now append the freshly created menu to the menu bar...
    wxMenuBar *menuBar = new wxMenuBar();
    menuBar->Append(menuFile, wxT("&File"));
    menuBar->Append(helpMenu, wxT("&Help"));

    // ... and attach this menu bar to the frame
    SetMenuBar(menuBar);

#if wxUSE_STATUSBAR
    // create a status bar just for fun (by default with 1 pane only)
    CreateStatusBar(3);
    SetStatusText(wxT("Welcome to wxWidgets!"));
#endif // wxUSE_STATUSBAR

    // Misc variables
    m_opened_file = NULL;

    m_panel = new wxPanel(this, wxID_ANY);

    // Initialize main slider
    m_positionSlider = new wxSlider( m_panel, MMBoard_PositionSlider, 0, 0, 60,
                     wxDefaultPosition, wxSize(300, wxDefaultCoord),
                     wxSL_HORIZONTAL | wxSL_AUTOTICKS);
    m_positionSlider->SetPageSize(60);  // 60 secs
    m_positionSlider->Disable();

    // Initialize info panel
    wxPanel *infoPanel = new wxPanel( m_panel, wxID_ANY);
    infoPanel->SetBackgroundColour(*wxBLACK);
    infoPanel->SetForegroundColour(*wxWHITE);

    wxBoxSizer *infoSizer = new wxBoxSizer(wxVERTICAL);

    m_fileType = new wxStaticText(infoPanel, wxID_ANY, wxEmptyString);
#if wxUSE_STATLINE