prntbase.cpp

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wxPrintout::wxPrintout(const wxString& title)
{
    m_printoutTitle = title ;
    m_printoutDC = (wxDC *) NULL;
    m_pageWidthMM = 0;
    m_pageHeightMM = 0;
    m_pageWidthPixels = 0;
    m_pageHeightPixels = 0;
    m_PPIScreenX = 0;
    m_PPIScreenY = 0;
    m_PPIPrinterX = 0;
    m_PPIPrinterY = 0;
    m_isPreview = false;
}

wxPrintout::~wxPrintout()
{
}

bool wxPrintout::OnBeginDocument(int WXUNUSED(startPage), int WXUNUSED(endPage))
{
    return GetDC()->StartDoc(_("Printing ") + m_printoutTitle);
}

void wxPrintout::OnEndDocument()
{
    GetDC()->EndDoc();
}

void wxPrintout::OnBeginPrinting()
{
}

void wxPrintout::OnEndPrinting()
{
}

bool wxPrintout::HasPage(int page)
{
    return (page == 1);
}

void wxPrintout::GetPageInfo(int *minPage, int *maxPage, int *fromPage, int *toPage)
{
    *minPage = 1;
    *maxPage = 32000;
    *fromPage = 1;
    *toPage = 1;
}

//----------------------------------------------------------------------------
// wxPreviewCanvas
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)

BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
    EVT_PAINT(wxPreviewCanvas::OnPaint)
    EVT_CHAR(wxPreviewCanvas::OnChar)
    EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
#if wxUSE_MOUSEWHEEL
    EVT_MOUSEWHEEL(wxPreviewCanvas::OnMouseWheel)
#endif
END_EVENT_TABLE()

// VZ: the current code doesn't refresh properly without
//     wxFULL_REPAINT_ON_RESIZE, this must be fixed as otherwise we have
//     really horrible flicker when resizing the preview frame, but without
//     this style it simply doesn't work correctly at all...
wxPreviewCanvas::wxPreviewCanvas(wxPrintPreviewBase *preview, wxWindow *parent,
                                 const wxPoint& pos, const wxSize& size, long style, const wxString& name):
wxScrolledWindow(parent, wxID_ANY, pos, size, style | wxFULL_REPAINT_ON_RESIZE, name)
{
    m_printPreview = preview;
#ifdef __WXMAC__
    // The app workspace colour is always white, but we should have
    // a contrast with the page.
    wxSystemColour colourIndex = wxSYS_COLOUR_3DDKSHADOW;
#else
    wxSystemColour colourIndex = wxSYS_COLOUR_APPWORKSPACE;
#endif
    SetBackgroundColour(wxSystemSettings::GetColour(colourIndex));

    SetScrollbars(10, 10, 100, 100);
}

wxPreviewCanvas::~wxPreviewCanvas()
{
}

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

/*
#ifdef __WXGTK__
    if (!GetUpdateRegion().IsEmpty())
        dc.SetClippingRegion( GetUpdateRegion() );
#endif
*/

    if (m_printPreview)
    {
        m_printPreview->PaintPage(this, dc);
    }
}

// Responds to colour changes, and passes event on to children.
void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
{
#ifdef __WXMAC__
    // The app workspace colour is always white, but we should have
    // a contrast with the page.
    wxSystemColour colourIndex = wxSYS_COLOUR_3DDKSHADOW;
#else
    wxSystemColour colourIndex = wxSYS_COLOUR_APPWORKSPACE;
#endif
    SetBackgroundColour(wxSystemSettings::GetColour(colourIndex));
    Refresh();

    // Propagate the event to the non-top-level children
    wxWindow::OnSysColourChanged(event);
}

void wxPreviewCanvas::OnChar(wxKeyEvent &event)
{
    wxPreviewControlBar* controlBar = ((wxPreviewFrame*) GetParent())->GetControlBar();
    if (event.GetKeyCode() == WXK_ESCAPE)
    {
        ((wxPreviewFrame*) GetParent())->Close(true);
        return;
    }
    else if (event.GetKeyCode() == WXK_TAB)
    {
        controlBar->OnGoto();
        return;
    }
    else if (event.GetKeyCode() == WXK_RETURN)
    {
        controlBar->OnPrint();
        return;
    }

    if (!event.ControlDown())
    {
        event.Skip();
        return;
    }

    switch(event.GetKeyCode())
    {
        case WXK_NEXT:
            controlBar->OnNext(); break;
        case WXK_PRIOR:
            controlBar->OnPrevious(); break;
        case WXK_HOME:
            controlBar->OnFirst(); break;
        case WXK_END:
            controlBar->OnLast(); break;
        default:
            event.Skip();
    }
}

#if wxUSE_MOUSEWHEEL

void wxPreviewCanvas::OnMouseWheel(wxMouseEvent& event)
{
    wxPreviewControlBar *
        controlBar = wxStaticCast(GetParent(), wxPreviewFrame)->GetControlBar();

    if ( controlBar )
    {
        if ( event.ControlDown() && event.GetWheelRotation() != 0 )
        {
            int currentZoom = controlBar->GetZoomControl();

            int delta;
            if ( currentZoom < 100 )
                delta = 5;
            else if ( currentZoom <= 120 )
                delta = 10;
            else
                delta = 50;

            if ( event.GetWheelRotation() > 0 )
                delta = -delta;

            int newZoom = currentZoom + delta;
            if ( newZoom < 10 )
                newZoom = 10;
            if ( newZoom > 200 )
                newZoom = 200;
            if ( newZoom != currentZoom )
            {
                controlBar->SetZoomControl(newZoom);
                m_printPreview->SetZoom(newZoom);
                Refresh();
            }
            return;
        }
    }

    event.Skip();
}

#endif // wxUSE_MOUSEWHEEL

//----------------------------------------------------------------------------
// wxPreviewControlBar
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)

BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
    EVT_BUTTON(wxID_PREVIEW_CLOSE,    wxPreviewControlBar::OnWindowClose)
    EVT_BUTTON(wxID_PREVIEW_PRINT,    wxPreviewControlBar::OnPrintButton)
    EVT_BUTTON(wxID_PREVIEW_PREVIOUS, wxPreviewControlBar::OnPreviousButton)
    EVT_BUTTON(wxID_PREVIEW_NEXT,     wxPreviewControlBar::OnNextButton)
    EVT_BUTTON(wxID_PREVIEW_FIRST,    wxPreviewControlBar::OnFirstButton)
    EVT_BUTTON(wxID_PREVIEW_LAST,     wxPreviewControlBar::OnLastButton)
    EVT_BUTTON(wxID_PREVIEW_GOTO,     wxPreviewControlBar::OnGotoButton)
    EVT_CHOICE(wxID_PREVIEW_ZOOM,     wxPreviewControlBar::OnZoom)
    EVT_PAINT(wxPreviewControlBar::OnPaint)
END_EVENT_TABLE()

wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
                                         wxWindow *parent, const wxPoint& pos, const wxSize& size,
                                         long style, const wxString& name):
wxPanel(parent, wxID_ANY, pos, size, style, name)
{
    m_printPreview = preview;
    m_closeButton = (wxButton *) NULL;
    m_nextPageButton = (wxButton *) NULL;
    m_previousPageButton = (wxButton *) NULL;
    m_printButton = (wxButton *) NULL;
    m_zoomControl = (wxChoice *) NULL;
    m_buttonFlags = buttons;
}

wxPreviewControlBar::~wxPreviewControlBar()
{
}

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

    int w, h;
    GetSize(&w, &h);
    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxTRANSPARENT_BRUSH);
    dc.DrawLine( 0, h-1, w, h-1 );
}

void wxPreviewControlBar::OnWindowClose(wxCommandEvent& WXUNUSED(event))
{
    wxPreviewFrame *frame = (wxPreviewFrame *)GetParent();
    frame->Close(true);
}

void wxPreviewControlBar::OnPrint(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    preview->Print(true);
}

void wxPreviewControlBar::OnNext(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    if (preview)
    {
        int currentPage = preview->GetCurrentPage();
        if ((preview->GetMaxPage() > 0) &&
            (currentPage < preview->GetMaxPage()) &&
            preview->GetPrintout()->HasPage(currentPage + 1))
        {
            preview->SetCurrentPage(currentPage + 1);
        }
    }
}

void wxPreviewControlBar::OnPrevious(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    if (preview)
    {
        int currentPage = preview->GetCurrentPage();
        if ((preview->GetMinPage() > 0) &&
            (currentPage > preview->GetMinPage()) &&
            preview->GetPrintout()->HasPage(currentPage - 1))
        {
            preview->SetCurrentPage(currentPage - 1);
        }
    }
}

void wxPreviewControlBar::OnFirst(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    if (preview)
    {
        int currentPage = preview->GetMinPage();
        if (preview->GetPrintout()->HasPage(currentPage))
        {
            preview->SetCurrentPage(currentPage);
        }
    }
}

void wxPreviewControlBar::OnLast(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    if (preview)
    {
        int currentPage = preview->GetMaxPage();
        if (preview->GetPrintout()->HasPage(currentPage))
        {
            preview->SetCurrentPage(currentPage);
        }
    }
}

void wxPreviewControlBar::OnGoto(void)
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    if (preview)
    {
        long currentPage;

        if (preview->GetMinPage() > 0)
        {
            wxString strPrompt;
            wxString strPage;

            strPrompt.Printf( _("Enter a page number between %d and %d:"),
                preview->GetMinPage(), preview->GetMaxPage());
            strPage.Printf( wxT("%d"), preview->GetCurrentPage() );

            strPage =
                wxGetTextFromUser( strPrompt, _("Goto Page"), strPage, GetParent());

            if ( strPage.ToLong( &currentPage ) )
                if (preview->GetPrintout()->HasPage(currentPage))
                {
                    preview->SetCurrentPage(currentPage);
                }
        }
    }
}

void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
{
    int zoom = GetZoomControl();
    if (GetPrintPreview())
        GetPrintPreview()->SetZoom(zoom);
}

void wxPreviewControlBar::CreateButtons()
{
    SetSize(0, 0, 400, 40);

    wxBoxSizer *item0 = new wxBoxSizer( wxHORIZONTAL );

    m_closeButton = new wxButton( this, wxID_PREVIEW_CLOSE, _("&Close"), wxDefaultPosition, wxDefaultSize, 0 );
    item0->Add( m_closeButton, 0, wxALIGN_CENTRE|wxALL, 5 );

    if (m_buttonFlags & wxPREVIEW_PRINT)
    {
        m_printButton = new wxButton( this, wxID_PREVIEW_PRINT, _("&Print..."), wxDefaultPosition, wxDefaultSize, 0 );
        item0->Add( m_printButton, 0, wxALIGN_CENTRE|wxALL, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_FIRST)
    {
        m_firstPageButton = new wxButton( this, wxID_PREVIEW_FIRST, _("|<<"), wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT );
        item0->Add( m_firstPageButton, 0, wxALIGN_CENTRE|wxALL, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_PREVIOUS)
    {
        m_previousPageButton = new wxButton( this, wxID_PREVIEW_PREVIOUS, _("<<"), wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT );
        item0->Add( m_previousPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_NEXT)
    {
        m_nextPageButton = new wxButton( this, wxID_PREVIEW_NEXT, _(">>"), wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT );
        item0->Add( m_nextPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_LAST)
    {
        m_lastPageButton = new wxButton( this, wxID_PREVIEW_LAST, _(">>|"), wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT );
        item0->Add( m_lastPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_GOTO)
    {
        m_gotoPageButton = new wxButton( this, wxID_PREVIEW_GOTO, _("&Goto..."), wxDefaultPosition, wxDefaultSize, 0 );
        item0->Add( m_gotoPageButton, 0, wxALIGN_CENTRE|wxALL, 5 );
    }

    if (m_buttonFlags & wxPREVIEW_ZOOM)
    {
        wxString choices[] =
        {
            wxT("10%"), wxT("15%"), wxT("20%"), wxT("25%"), wxT("30%"), wxT("35%"), wxT("40%"), wxT("45%"), wxT("50%"), wxT("55%"),
                wxT("60%"), wxT("65%"), wxT("70%"), wxT("75%"), wxT("80%"), wxT("85%"), wxT("90%"), wxT("95%"), wxT("100%"), wxT("110%"),
                wxT("120%"), wxT("150%"), wxT("200%")
        };
        int n = WXSIZEOF(choices);

        m_zoomControl = new wxChoice( this, wxID_PREVIEW_ZOOM, wxDefaultPosition, wxSize(70,wxDefaultCoord), n, choices, 0 );
        item0->Add( m_zoomControl, 0, wxALIGN_CENTRE|wxALL, 5 );
        SetZoomControl(m_printPreview->GetZoom());
    }

    SetSizer(item0);
    item0->Fit(this);
}

void wxPreviewControlBar::SetZoomControl(int zoom)
{
    if (m_zoomControl)
    {
        int n, count = m_zoomControl->GetCount();
        long val;
        for (n=0; n<count; n++)
        {
            if (m_zoomControl->GetString(n).BeforeFirst(wxT('%')).ToLong(&val) &&
                (val >= long(zoom)))
            {
                m_zoomControl->SetSelection(n);
                return;
            }
        }

        m_zoomControl->SetSelection(count-1);
    }
}

int wxPreviewControlBar::GetZoomControl()
{
    if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxEmptyString))
    {
        long val;
        if (m_zoomControl->GetStringSelection().BeforeFirst(wxT('%')).ToLong(&val))
            return int(val);
    }

    return 0;
}


/*
* Preview frame
*/

IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)

BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
    EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
END_EVENT_TABLE()

wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxWindow *parent, const wxString& title,
                               const wxPoint& pos, const wxSize& size, long style, const wxString& name):
wxFrame(parent, wxID_ANY, title, pos, size, style, name)
{
    m_printPreview = preview;
    m_controlBar = NULL;
    m_previewCanvas = NULL;
    m_windowDisabler = NULL;

    // Give the application icon
#ifdef __WXMSW__
    wxFrame* topFrame = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
    if (topFrame)
        SetIcon(topFrame->GetIcon());
#endif
}

wxPreviewFrame::~wxPreviewFrame()
{
}

void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
    if (m_windowDisabler)
        delete m_windowDisabler;

    // Need to delete the printout and the print preview
    wxPrintout *printout = m_printPreview->GetPrintout();
    if (printout)
    {
        delete printout;
        m_printPreview->SetPrintout(NULL);
        m_printPreview->SetCanvas(NULL);
        m_printPreview->SetFrame(NULL);
    }
    delete m_printPreview;

    Destroy();
}

void wxPreviewFrame::Initialize()