animate.cpp

Wxpython Implemented on Windows CE, Source code

        return;

    m_savedBackground.Create(rect.width, rect.height);

    wxMemoryDC memDC;
    memDC.SelectObject(m_savedBackground);

    if (m_useParentBackground && GetWindow()->GetParent())
    {
        wxWindow* parent = GetWindow()->GetParent();
        wxClientDC dc(parent);

        // Translate the point to coordinates in the
        // parent's client area, going via screen coordinates
        wxPoint pt(rect.x, rect.y);
        wxPoint screenPt = GetWindow()->ClientToScreen(pt);
        wxPoint parentPt = parent->ScreenToClient(screenPt);

        memDC.Blit(0, 0, rect.width, rect.height, & dc, parentPt.x, parentPt.y);
    }
    else
    {
        wxClientDC dc(GetWindow());

        memDC.Blit(0, 0, rect.width, rect.height, & dc, rect.x, rect.y);
    }

    memDC.SelectObject(wxNullBitmap);
}

// Draw this frame
void wxAnimationPlayer::DrawFrame(int frame, wxDC& dc, const wxPoint& pos)
{
    wxASSERT_MSG( (m_animation != NULL), _T("Animation not present in wxAnimationPlayer"));
    wxASSERT_MSG( (m_frames.GetCount() != 0), _T("Animation cache not present in wxAnimationPlayer"));
    wxASSERT_MSG( !!m_frames.Item(frame), _T("Image not present in wxAnimationPlayer::DrawFrame"));

    wxBitmap* bitmap = (wxBitmap*) m_frames.Item(frame)->GetData() ;
    wxRect rect = GetFrameRect(frame);

    dc.DrawBitmap(*bitmap, pos.x + rect.x, pos.y + rect.y, (bitmap->GetMask() != NULL));
}

void wxAnimationTimer::Notify()
{
    m_player->PlayFrame();
}

/*
 * wxAnimationBase
 */

IMPLEMENT_ABSTRACT_CLASS(wxAnimationBase, wxObject)

/*
 * wxGIFAnimation
 */

IMPLEMENT_CLASS(wxGIFAnimation, wxAnimationBase)

wxGIFAnimation::wxGIFAnimation()
{
    m_decoder = (wxGIFDecoder*) NULL;
}

wxGIFAnimation::~wxGIFAnimation()
{
    delete m_decoder;
}

int wxGIFAnimation::GetFrameCount() const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    return m_decoder->GetNumberOfFrames();
}

wxImage* wxGIFAnimation::GetFrame(int i) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    m_decoder->GoFrame(i + 1);

    wxImage* image = new wxImage;
    m_decoder->ConvertToImage(image);

    return image;
}

wxAnimationDisposal wxGIFAnimation::GetDisposalMethod(int i) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    m_decoder->GoFrame(i + 1);

    int disposalMethod = m_decoder->GetDisposalMethod();
    return (wxAnimationDisposal) disposalMethod;
}

wxRect wxGIFAnimation::GetFrameRect(int i) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    m_decoder->GoFrame(i + 1);

    wxRect rect(m_decoder->GetLeft(), m_decoder->GetTop(), m_decoder->GetWidth(), m_decoder->GetHeight());

    return rect;
}

int wxGIFAnimation::GetDelay(int i) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    m_decoder->GoFrame(i + 1);

    return m_decoder->GetDelay();
}

wxSize wxGIFAnimation::GetLogicalScreenSize() const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    return wxSize(m_decoder->GetLogicalScreenWidth(), m_decoder->GetLogicalScreenHeight());
}

bool wxGIFAnimation::GetBackgroundColour(wxColour& col) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    int i = m_decoder->GetBackgroundColour();
    if (i == -1)
        return false;

    const unsigned char *pal = m_decoder->GetPalette();
    bool result = (pal != NULL);

    if (result)
        col = wxColour(pal[3*i + 0], pal[3*i + 1], pal[3*i + 2]);

    return result;
}

bool wxGIFAnimation::GetTransparentColour(wxColour& col) const
{
    wxASSERT_MSG( (m_decoder != (wxGIFDecoder*) NULL), _T("m_decoder must be non-NULL"));

    int i = m_decoder->GetTransparentColour();
    if (i == -1)
        return false;

    const unsigned char *pal = m_decoder->GetPalette();
    bool result = (pal != NULL);

    if (result)
        col = wxColour(pal[3*i + 0], pal[3*i + 1], pal[3*i + 2]);

    return result;
}

bool wxGIFAnimation::IsValid() const
{
    return ((m_decoder != NULL) && (m_decoder->IsAnimation()));
}

bool wxGIFAnimation::LoadFile(const wxString& filename)
{
    if (!wxFileExists(filename))
        return false;

    bool result = true;

    if (m_decoder)
    {
        delete m_decoder;
        m_decoder = NULL;
    }

    {
        wxFileInputStream stream(filename);

        if (stream.GetLength() > 0)
            m_decoder = new wxGIFDecoder(&stream, true);

        result = ((m_decoder != NULL) && (m_decoder->ReadGIF() == wxGIF_OK));
        if (result)
            result = m_decoder->IsAnimation();
    }

    if (!result && (m_decoder != NULL))
    {
        delete m_decoder;
        m_decoder = NULL;
    }

    return result;
}

/*
 * wxAnimationCtrlBase
 * Abstract base class for format-specific animation controls.
 * This class implements most of the functionality; all a derived
 * class has to do is create the appropriate animation class on demand.
 */

IMPLEMENT_ABSTRACT_CLASS(wxAnimationCtrlBase, wxControl)

BEGIN_EVENT_TABLE(wxAnimationCtrlBase, wxControl)
    EVT_PAINT(wxAnimationCtrlBase::OnPaint)
END_EVENT_TABLE()

bool wxAnimationCtrlBase::Create(wxWindow *parent, wxWindowID id,
            const wxString& filename, const wxPoint& pos,
            const wxSize& size, long style, const wxString& name)
{
    m_animation = NULL;
    m_filename = filename;

    if (!wxControl::Create(parent, id, pos, size, style, wxDefaultValidator, name))
        return false;

    SetBackgroundColour(parent->GetBackgroundColour());

    m_animationPlayer.SetCustomBackgroundColour(GetBackgroundColour());

    // give the impression of transparency by painting
    // with the parent background
//    if (parent)
//        m_animationPlayer.UseParentBackground(true);

    m_animationPlayer.SetWindow(this);
    m_animationPlayer.SetPosition(wxPoint(0, 0));
    m_animationPlayer.SetDestroyAnimation(false);

    LoadFile(filename);
    
    return true;
}

wxAnimationCtrlBase::~wxAnimationCtrlBase()
{
    if (m_animationPlayer.IsPlaying())
        m_animationPlayer.Stop();
    m_animationPlayer.SetAnimation(NULL, false);

    delete m_animation;
}

bool wxAnimationCtrlBase::LoadFile(const wxString& filename)
{
    if (m_animationPlayer.IsPlaying())
        m_animationPlayer.Stop();

    wxString filename1(filename);

    if (filename1.IsEmpty())
    {
        filename1 = m_filename;
        if (filename1.IsEmpty())
            return false;
    }

    if (m_animation)
    {
        delete m_animation;
        m_animation = NULL;
    }

    m_animation = DoCreateAnimation(filename1);
    if (!m_animation)
        return false;

    if (!m_animation->LoadFile(filename) || !m_animation->IsValid())
    {
        delete m_animation;
        m_animation = NULL;

        return false;
    }

    m_animationPlayer.SetAnimation(m_animation, false);

    if (GetWindowStyle() & wxAN_FIT_ANIMATION)
        FitToAnimation();

    return true;
}

bool wxAnimationCtrlBase::Play(bool looped)
{
    return m_animationPlayer.Play(*this, wxPoint(0, 0), looped);
}

wxSize wxAnimationCtrlBase::DoGetBestSize() const
{
    if (m_animationPlayer.HasAnimation() && (GetWindowStyle() & wxAN_FIT_ANIMATION))
        return m_animationPlayer.GetLogicalScreenSize();
    else
        return GetSize();
}

void wxAnimationCtrlBase::FitToAnimation()
{
    if (!m_animationPlayer.HasAnimation())
        return;

    wxSize sz = m_animationPlayer.GetLogicalScreenSize();
    SetClientSize(sz);
}

void wxAnimationCtrlBase::OnPaint(wxPaintEvent& WXUNUSED(event))
{
    wxPaintDC dc(this);

    if (GetPlayer().IsPlaying())
        GetPlayer().Draw(dc);
}

/*
 * wxGIFAnimationCtrl
 * Provides a GIF animation class when required.
 */

IMPLEMENT_ABSTRACT_CLASS(wxGIFAnimationCtrl, wxAnimationCtrlBase)

wxAnimationBase* wxGIFAnimationCtrl::DoCreateAnimation(const wxString& WXUNUSED(filename))
{
    return new wxGIFAnimation;
}