src/common/prntbase.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        prntbase.cpp
// Purpose:     Printing framework base class implementation
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:       wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "prntbase.h"
#endif

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/defs.h"

#if wxUSE_PRINTING_ARCHITECTURE

#ifndef WX_PRECOMP
#include "wx/utils.h"
#include "wx/dc.h"
#include "wx/app.h"
#include "wx/msgdlg.h"
#include "wx/layout.h"
#include "wx/choice.h"
#include "wx/button.h"
#include "wx/settings.h"
#include "wx/dcmemory.h"
#include "wx/stattext.h"
#include "wx/intl.h"
#endif

#include "wx/prntbase.h"
#include "wx/dcprint.h"
#include "wx/printdlg.h"
#include "wx/module.h"

#include <stdlib.h>
#include <string.h>

#ifdef __WXMSW__
    #include "wx/msw/private.h"
    #include <commdlg.h>

    #ifndef __WIN32__
        #include <print.h>
    #endif
#endif // __WXMSW__

IMPLEMENT_CLASS(wxPrinterBase, wxObject)
IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)
IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)
IMPLEMENT_CLASS(wxPrintPreviewBase, wxObject)

BEGIN_EVENT_TABLE(wxPrintAbortDialog, wxDialog)
    EVT_BUTTON(wxID_CANCEL, wxPrintAbortDialog::OnCancel)
END_EVENT_TABLE()

BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
    EVT_PAINT(wxPreviewCanvas::OnPaint)
    EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
END_EVENT_TABLE()

/*
* Printer
*/

wxPrinterBase::wxPrinterBase(wxPrintDialogData *data)
{
    m_currentPrintout = (wxPrintout *) NULL;
    sm_abortWindow = (wxWindow *) NULL;
    sm_abortIt = FALSE;
    if (data)
        m_printDialogData = (*data);
    sm_lastError = wxPRINTER_NO_ERROR;
}

wxWindow *wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
bool wxPrinterBase::sm_abortIt = FALSE;
wxPrinterError wxPrinterBase::sm_lastError = wxPRINTER_NO_ERROR;

wxPrinterBase::~wxPrinterBase()
{
}

void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
{
    wxPrinterBase::sm_abortIt = TRUE;
    wxPrinterBase::sm_abortWindow->Show(FALSE);
    wxPrinterBase::sm_abortWindow->Close(TRUE);
    wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
}

wxWindow *wxPrinterBase::CreateAbortWindow(wxWindow *parent, wxPrintout *WXUNUSED(printout))
{
    wxPrintAbortDialog *dialog = new wxPrintAbortDialog(parent, _("Printing"), wxPoint(0, 0), wxSize(400, 400), wxDEFAULT_DIALOG_STYLE);
    (void) new wxStaticText(dialog, -1, _("Please wait..."), wxPoint(5, 5));

    wxButton *button = new wxButton(dialog, wxID_CANCEL, _("Cancel"), wxPoint(5, 30));

    dialog->Fit();
    button->Centre(wxHORIZONTAL);

    dialog->Centre();
    return dialog;
}

void wxPrinterBase::ReportError(wxWindow *parent, wxPrintout *WXUNUSED(printout), const wxString& message)
{
    wxMessageBox(message, _("Printing Error"), wxOK, parent);
}

/*
* Printout class
*/

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"));
}

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;
}

/*
* Preview canvas
*/

wxPreviewCanvas::wxPreviewCanvas(wxPrintPreviewBase *preview, wxWindow *parent,
                                 const wxPoint& pos, const wxSize& size, long style, const wxString& name):
wxScrolledWindow(parent, -1, pos, size, style, name)
{
    m_printPreview = preview;
    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));

    SetScrollbars(15, 18, 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)
{
    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
    Refresh();

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

/*
* Preview control bar
*/

BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
    EVT_BUTTON(wxID_PREVIEW_CLOSE,    wxPreviewControlBar::OnWindowClose)
    EVT_BUTTON(wxID_PREVIEW_PRINT,    wxPreviewControlBar::OnPrint)
    EVT_BUTTON(wxID_PREVIEW_PREVIOUS, wxPreviewControlBar::OnPreviousButton)
    EVT_BUTTON(wxID_PREVIEW_NEXT,     wxPreviewControlBar::OnNextButton)
    EVT_CHAR(wxPreviewControlBar::OnChar)
    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, -1, 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(wxCommandEvent& WXUNUSED(event))
{
    wxPrintPreviewBase *preview = GetPrintPreview();
    preview->Print(TRUE);
}

void wxPreviewControlBar::OnChar(wxKeyEvent &event)
{
   switch(event.KeyCode())
   {
   case WXK_NEXT:
      OnNext(); break;
   case WXK_PRIOR:
      OnPrevious(); break;
   default:
      event.Skip();
   }
}

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

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

    /*
    #ifdef __WXMSW__
    int fontSize = 9;
    #else
    int fontSize = 10;
    #endif

      wxFont buttonFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
      SetFont(buttonFont);
    */

    int buttonWidth = 65;
#ifdef __WXGTK__
    int buttonHeight = -1;
#else
    int buttonHeight = 24;
#endif

    int x = 5;
    int y = 5;

#ifdef __WXMOTIF__
    int gap = 15;
#else
    int gap = 5;
#endif

    m_closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
        wxPoint(x, y), wxSize(buttonWidth, buttonHeight));

    x += gap + buttonWidth;

    if (m_buttonFlags & wxPREVIEW_PRINT)
    {
        m_printButton =  new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
            wxSize(buttonWidth, buttonHeight));
        x += gap + buttonWidth;
    }

    if (m_buttonFlags & wxPREVIEW_PREVIOUS)
    {
        m_previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, wxT("<<"), wxPoint(x, y),
            wxSize(buttonWidth, buttonHeight));
        x += gap + buttonWidth;
    }

    if (m_buttonFlags & wxPREVIEW_NEXT)
    {
        m_nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, wxT(">>"),
            wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
        x += gap + buttonWidth;
    }

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

        int n = WXSIZEOF(choices);

        wxString* strings = new wxString[n];
        int i;
        for (i = 0; i < n; i++ )
           strings[i] = choices[i];

        m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
                                     wxPoint(x, y),
                                     wxSize(100, -1),
                                     n,
                                     strings
                                    );
        delete[] strings;

        SetZoomControl(m_printPreview->GetZoom());
    }

    //  m_closeButton->SetDefault();
}

void wxPreviewControlBar::SetZoomControl(int zoom)
{
    char buf[20];
    sprintf(buf, "%d%%", zoom);
// Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
    if (m_zoomControl)
        m_zoomControl->SetStringSelection(buf);
}

int wxPreviewControlBar::GetZoomControl()
{
    wxChar buf[20];
    if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
    {
        wxStrcpy(buf, m_zoomControl->GetStringSelection());
        buf[wxStrlen(buf) - 1] = 0;
        return (int)wxAtoi(buf);
    }
    else return 0;
}


/*
* Preview frame
*/

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

wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
                               const wxPoint& pos, const wxSize& size, long style, const wxString& name):
wxFrame(parent, -1, title, pos, size, style, name)
{
    m_printPreview = preview;
    m_controlBar = NULL;
    m_previewCanvas = NULL;
}

wxPreviewFrame::~wxPreviewFrame()
{
}

void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
    MakeModal(FALSE);

    // 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()
{
    CreateStatusBar();

    CreateCanvas();
    CreateControlBar();

    m_printPreview->SetCanvas(m_previewCanvas);
    m_printPreview->SetFrame(this);

    // Set layout constraints here

    // Control bar constraints
    wxLayoutConstraints *c1 = new wxLayoutConstraints;
    //  int w, h;
    //  m_controlBar->GetSize(&w, &h);
    int h;
#if (defined(__WXMSW__) || defined(__WXGTK__))
    h = 40;
#else
    h = 60;
#endif

    c1->left.SameAs       (this, wxLeft);
    c1->top.SameAs        (this, wxTop);
    c1->right.SameAs      (this, wxRight);
    c1->height.Absolute   (h);

    m_controlBar->SetConstraints(c1);

    // Canvas constraints
    wxLayoutConstraints *c2 = new wxLayoutConstraints;

    c2->left.SameAs       (this, wxLeft);
    c2->top.Below         (m_controlBar);
    c2->right.SameAs      (this, wxRight);
    c2->bottom.SameAs     (this, wxBottom);

    m_previewCanvas->SetConstraints(c2);

    SetAutoLayout(TRUE);

    MakeModal(TRUE);

    Layout();
}

void wxPreviewFrame::CreateCanvas()
{
    m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
}

void wxPreviewFrame::CreateControlBar()
{
    long buttons = wxPREVIEW_DEFAULT;
    if (m_printPreview->GetPrintoutForPrinting())
        buttons |= wxPREVIEW_PRINT;

    m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
    m_controlBar->CreateButtons();
}

/*
* Print preview
*/

wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
                                       wxPrintout *printoutForPrinting,
                                       wxPrintData *data)
{
    if (data)
        m_printDialogData = (*data);

    Init(printout, printoutForPrinting);
}

wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
                                       wxPrintout *printoutForPrinting,
                                       wxPrintDialogData *data)
{
    if (data)
        m_printDialogData = (*data);

    Init(printout, printoutForPrinting);
}

void wxPrintPreviewBase::Init(wxPrintout *printout,
                              wxPrintout *printoutForPrinting)
{
    m_isOk = TRUE;
    m_previewPrintout = printout;
    if (m_previewPrintout)
        m_previewPrintout->SetIsPreview(TRUE);

    m_printPrintout = printoutForPrinting;

    m_previewCanvas = NULL;
    m_previewFrame = NULL;
    m_previewBitmap = NULL;
    m_currentPage = 1;
    m_currentZoom = 70;
    m_topMargin = 40;
    m_leftMargin = 40;
    m_pageWidth = 0;
    m_pageHeight = 0;
    m_printingPrepared = FALSE;

    // Too soon! Moved to RenderPage.
    // printout->OnPreparePrinting();

    // Get some parameters from the printout, if defined
    int selFrom, selTo;
    printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
}

wxPrintPreviewBase::~wxPrintPreviewBase()
{
    if (m_previewPrintout)
        delete m_previewPrintout;
    if (m_previewBitmap)
        delete m_previewBitmap;
    if (m_printPrintout)
        delete m_printPrintout;
}

bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
{
    if (m_currentPage == pageNum)
        return TRUE;

    m_currentPage = pageNum;
    if (m_previewBitmap)
    {
        delete m_previewBitmap;
        m_previewBitmap = NULL;
    }

    if (m_previewCanvas)
    {
        if (!RenderPage(pageNum))
        	return FALSE;
        m_previewCanvas->Refresh();
    }
    return TRUE;
}

bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
{
    DrawBlankPage(canvas, dc);

    if (!m_previewBitmap)
        if (!RenderPage(m_currentPage))
        	return FALSE;

    if (!m_previewBitmap)
        return FALSE;

    if (!canvas)
        return FALSE;

    int canvasWidth, canvasHeight;
    canvas->GetSize(&canvasWidth, &canvasHeight);

    double zoomScale = ((float)m_currentZoom/(float)100);
    double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
    //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);

    int x = (int) ((canvasWidth - actualWidth)/2.0);
    if (x < m_leftMargin)
        x = m_leftMargin;
    int y = m_topMargin;

    wxMemoryDC temp_dc;
    temp_dc.SelectObject(*m_previewBitmap);

    dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);

    temp_dc.SelectObject(wxNullBitmap);

    return TRUE;
}

bool wxPrintPreviewBase::RenderPage(int pageNum)
{
    wxBusyCursor busy;

    int canvasWidth, canvasHeight;

    if (!m_previewCanvas)
    {
        wxFAIL_MSG(_T("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));

        return FALSE;
    }
    m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);

    double zoomScale = (m_currentZoom/100.0);
    int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
    int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);

    int x = (int)((canvasWidth - actualWidth)/2.0);
    if (x < m_leftMargin)
        x = m_leftMargin;
    //  int y = m_topMargin;


    if (!m_previewBitmap)
    {
        m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
        if (!m_previewBitmap || !m_previewBitmap->Ok())
        {
            if (m_previewBitmap) {
                delete m_previewBitmap;
                m_previewBitmap = NULL;
            }
            wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
            return FALSE;
        }
    }

    wxMemoryDC memoryDC;
    memoryDC.SelectObject(*m_previewBitmap);

    memoryDC.Clear();

    m_previewPrintout->SetDC(&memoryDC);
    m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);

    // Need to delay OnPreparePrinting until here, so we have enough information.
    if (!m_printingPrepared)
    {
        m_previewPrintout->OnPreparePrinting();
        m_printingPrepared = TRUE;
    }

    m_previewPrintout->OnBeginPrinting();

    if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
    {
        wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);

        memoryDC.SelectObject(wxNullBitmap);

        delete m_previewBitmap;
        m_previewBitmap = NULL;
        return FALSE;
    }

    m_previewPrintout->OnPrintPage(pageNum);
    m_previewPrintout->OnEndDocument();
    m_previewPrintout->OnEndPrinting();

    m_previewPrintout->SetDC(NULL);

    memoryDC.SelectObject(wxNullBitmap);

    wxChar buf[200];
    if (m_maxPage != 0)
        wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
    else
        wxSprintf(buf, _("Page %d"), pageNum);

    if (m_previewFrame)
        m_previewFrame->SetStatusText(buf);

    return TRUE;
}


bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
{
    int canvasWidth, canvasHeight;
    canvas->GetSize(&canvasWidth, &canvasHeight);

    float zoomScale = (float)((float)m_currentZoom/(float)100);
    float actualWidth = zoomScale*m_pageWidth*m_previewScale;
    float actualHeight = zoomScale*m_pageHeight*m_previewScale;

    float x = (float)((canvasWidth - actualWidth)/2.0);
    if (x < m_leftMargin)
        x = (float)m_leftMargin;
    float y = (float)m_topMargin;

    // Draw shadow, allowing for 1-pixel border AROUND the actual page
    int shadowOffset = 4;
    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxBLACK_BRUSH);
    /*
    dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
    */
    dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
    dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));

    // Draw blank page allowing for 1-pixel border AROUND the actual page
    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxWHITE_BRUSH);

    /*
    wxRegion update_region = canvas->GetUpdateRegion();
    wxRect r = update_region.GetBox();

      printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
    */

    dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));

    return TRUE;
}

void wxPrintPreviewBase::SetZoom(int percent)
{
    if (m_currentZoom == percent)
        return;

    m_currentZoom = percent;
    if (m_previewBitmap)
    {
        delete m_previewBitmap;
        m_previewBitmap = NULL;
    }

    if (m_previewCanvas)
    {
        RenderPage(m_currentPage);
        ((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
        m_previewCanvas->Clear();
        m_previewCanvas->Refresh();
    }
}

#endif // wxUSE_PRINTING_ARCHITECTURE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: prntbase.cpp
	3	// Purpose: Printing framework base class implementation
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 04/01/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "prntbase.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#include "wx/defs.h"
	24
	25	#if wxUSE_PRINTING_ARCHITECTURE
	26
	27	#ifndef WX_PRECOMP
	28	#include "wx/utils.h"
	29	#include "wx/dc.h"
	30	#include "wx/app.h"
	31	#include "wx/msgdlg.h"
	32	#include "wx/layout.h"
	33	#include "wx/choice.h"
	34	#include "wx/button.h"
	35	#include "wx/settings.h"
	36	#include "wx/dcmemory.h"
	37	#include "wx/stattext.h"
	38	#include "wx/intl.h"
	39	#endif
	40
	41	#include "wx/prntbase.h"
	42	#include "wx/dcprint.h"
	43	#include "wx/printdlg.h"
	44	#include "wx/module.h"
	45
	46	#include <stdlib.h>
	47	#include <string.h>
	48
	49	#ifdef __WXMSW__
	50	#include "wx/msw/private.h"
	51	#include <commdlg.h>
	52
	53	#ifndef __WIN32__
	54	#include <print.h>
	55	#endif
	56	#endif // __WXMSW__
	57
	58	IMPLEMENT_CLASS(wxPrinterBase, wxObject)
	59	IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
	60	IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
	61	IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)
	62	IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)
	63	IMPLEMENT_CLASS(wxPrintPreviewBase, wxObject)
	64
	65	BEGIN_EVENT_TABLE(wxPrintAbortDialog, wxDialog)
	66	EVT_BUTTON(wxID_CANCEL, wxPrintAbortDialog::OnCancel)
	67	END_EVENT_TABLE()
	68
	69	BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
	70	EVT_PAINT(wxPreviewCanvas::OnPaint)
	71	EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
	72	END_EVENT_TABLE()
	73
	74	/*
	75	* Printer
	76	*/
	77
	78	wxPrinterBase::wxPrinterBase(wxPrintDialogData *data)
	79	{
	80	m_currentPrintout = (wxPrintout *) NULL;
	81	sm_abortWindow = (wxWindow *) NULL;
	82	sm_abortIt = FALSE;
	83	if (data)
	84	m_printDialogData = (*data);
	85	sm_lastError = wxPRINTER_NO_ERROR;
	86	}
	87
	88	wxWindow wxPrinterBase::sm_abortWindow = (wxWindow ) NULL;
	89	bool wxPrinterBase::sm_abortIt = FALSE;
	90	wxPrinterError wxPrinterBase::sm_lastError = wxPRINTER_NO_ERROR;
	91
	92	wxPrinterBase::~wxPrinterBase()
	93	{
	94	}
	95
	96	void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
	97	{
	98	wxPrinterBase::sm_abortIt = TRUE;
	99	wxPrinterBase::sm_abortWindow->Show(FALSE);
	100	wxPrinterBase::sm_abortWindow->Close(TRUE);
	101	wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
	102	}
	103
	104	wxWindow wxPrinterBase::CreateAbortWindow(wxWindow parent, wxPrintout *WXUNUSED(printout))
	105	{
	106	wxPrintAbortDialog *dialog = new wxPrintAbortDialog(parent, _("Printing"), wxPoint(0, 0), wxSize(400, 400), wxDEFAULT_DIALOG_STYLE);
	107	(void) new wxStaticText(dialog, -1, _("Please wait..."), wxPoint(5, 5));
	108
	109	wxButton *button = new wxButton(dialog, wxID_CANCEL, _("Cancel"), wxPoint(5, 30));
	110
	111	dialog->Fit();
	112	button->Centre(wxHORIZONTAL);
	113
	114	dialog->Centre();
	115	return dialog;
	116	}
	117
	118	void wxPrinterBase::ReportError(wxWindow parent, wxPrintout WXUNUSED(printout), const wxString& message)
	119	{
	120	wxMessageBox(message, _("Printing Error"), wxOK, parent);
	121	}
	122
	123	/*
	124	* Printout class
	125	*/
	126
	127	wxPrintout::wxPrintout(const wxString& title)
	128	{
	129	m_printoutTitle = title ;
	130	m_printoutDC = (wxDC *) NULL;
	131	m_pageWidthMM = 0;
	132	m_pageHeightMM = 0;
	133	m_pageWidthPixels = 0;
	134	m_pageHeightPixels = 0;
	135	m_PPIScreenX = 0;
	136	m_PPIScreenY = 0;
	137	m_PPIPrinterX = 0;
	138	m_PPIPrinterY = 0;
	139	m_isPreview = FALSE;
	140	}
	141
	142	wxPrintout::~wxPrintout()
	143	{
	144	}
	145
	146	bool wxPrintout::OnBeginDocument(int WXUNUSED(startPage), int WXUNUSED(endPage))
	147	{
	148	return GetDC()->StartDoc(_("Printing"));
	149	}
	150
	151	void wxPrintout::OnEndDocument()
	152	{
	153	GetDC()->EndDoc();
	154	}
	155
	156	void wxPrintout::OnBeginPrinting()
	157	{
	158	}
	159
	160	void wxPrintout::OnEndPrinting()
	161	{
	162	}
	163
	164	bool wxPrintout::HasPage(int page)
	165	{
	166	return (page == 1);
	167	}
	168
	169	void wxPrintout::GetPageInfo(int minPage, int maxPage, int fromPage, int toPage)
	170	{
	171	*minPage = 1;
	172	*maxPage = 32000;
	173	*fromPage = 1;
	174	*toPage = 1;
	175	}
	176
	177	/*
	178	* Preview canvas
	179	*/
	180
	181	wxPreviewCanvas::wxPreviewCanvas(wxPrintPreviewBase preview, wxWindow parent,
	182	const wxPoint& pos, const wxSize& size, long style, const wxString& name):
	183	wxScrolledWindow(parent, -1, pos, size, style, name)
	184	{
	185	m_printPreview = preview;
	186	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
	187
	188	SetScrollbars(15, 18, 100, 100);
	189	}
	190
	191	wxPreviewCanvas::~wxPreviewCanvas()
	192	{
	193	}
	194
	195	void wxPreviewCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
	196	{
	197	wxPaintDC dc(this);
	198	PrepareDC( dc );
	199
	200	/*
	201	#ifdef __WXGTK__
	202	if (!GetUpdateRegion().IsEmpty())
	203	dc.SetClippingRegion( GetUpdateRegion() );
	204	#endif
	205	*/
	206
	207	if (m_printPreview)
	208	{
	209	m_printPreview->PaintPage(this, dc);
	210	}
	211	}
	212
	213	// Responds to colour changes, and passes event on to children.
	214	void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
	215	{
	216	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
	217	Refresh();
	218
	219	// Propagate the event to the non-top-level children
	220	wxWindow::OnSysColourChanged(event);
	221	}
	222
	223	/*
	224	* Preview control bar
	225	*/
	226
	227	BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
	228	EVT_BUTTON(wxID_PREVIEW_CLOSE, wxPreviewControlBar::OnWindowClose)
	229	EVT_BUTTON(wxID_PREVIEW_PRINT, wxPreviewControlBar::OnPrint)
	230	EVT_BUTTON(wxID_PREVIEW_PREVIOUS, wxPreviewControlBar::OnPreviousButton)
	231	EVT_BUTTON(wxID_PREVIEW_NEXT, wxPreviewControlBar::OnNextButton)
	232	EVT_CHAR(wxPreviewControlBar::OnChar)
	233	EVT_CHOICE(wxID_PREVIEW_ZOOM, wxPreviewControlBar::OnZoom)
	234	EVT_PAINT(wxPreviewControlBar::OnPaint)
	235	END_EVENT_TABLE()
	236
	237	wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
	238	wxWindow *parent, const wxPoint& pos, const wxSize& size,
	239	long style, const wxString& name):
	240	wxPanel(parent, -1, pos, size, style, name)
	241	{
	242	m_printPreview = preview;
	243	m_closeButton = (wxButton *) NULL;
	244	m_nextPageButton = (wxButton *) NULL;
	245	m_previousPageButton = (wxButton *) NULL;
	246	m_printButton = (wxButton *) NULL;
	247	m_zoomControl = (wxChoice *) NULL;
	248	m_buttonFlags = buttons;
	249	}
	250
	251	wxPreviewControlBar::~wxPreviewControlBar()
	252	{
	253	}
	254
	255	void wxPreviewControlBar::OnPaint(wxPaintEvent& WXUNUSED(event))
	256	{
	257	wxPaintDC dc(this);
	258
	259	int w, h;
	260	GetSize(&w, &h);
	261	dc.SetPen(*wxBLACK_PEN);
	262	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	263	dc.DrawLine( 0, h-1, w, h-1 );
	264	}
	265
	266	void wxPreviewControlBar::OnWindowClose(wxCommandEvent& WXUNUSED(event))
	267	{
	268	wxPreviewFrame frame = (wxPreviewFrame )GetParent();
	269	frame->Close(TRUE);
	270	}
	271
	272	void wxPreviewControlBar::OnPrint(wxCommandEvent& WXUNUSED(event))
	273	{
	274	wxPrintPreviewBase *preview = GetPrintPreview();
	275	preview->Print(TRUE);
	276	}
	277
	278	void wxPreviewControlBar::OnChar(wxKeyEvent &event)
	279	{
	280	switch(event.KeyCode())
	281	{
	282	case WXK_NEXT:
	283	OnNext(); break;
	284	case WXK_PRIOR:
	285	OnPrevious(); break;
	286	default:
	287	event.Skip();
	288	}
	289	}
	290
	291	void wxPreviewControlBar::OnNext(void)
	292	{
	293	wxPrintPreviewBase *preview = GetPrintPreview();
	294	if (preview)
	295	{
	296	int currentPage = preview->GetCurrentPage();
	297	if ((preview->GetMaxPage() > 0) &&
	298	(currentPage < preview->GetMaxPage()) &&
	299	preview->GetPrintout()->HasPage(currentPage + 1))
	300	{
	301	preview->SetCurrentPage(currentPage + 1);
	302	}
	303	}
	304	}
	305
	306	void wxPreviewControlBar::OnPrevious(void)
	307	{
	308	wxPrintPreviewBase *preview = GetPrintPreview();
	309	if (preview)
	310	{
	311	int currentPage = preview->GetCurrentPage();
	312	if ((preview->GetMinPage() > 0) &&
	313	(currentPage > preview->GetMinPage()) &&
	314	preview->GetPrintout()->HasPage(currentPage - 1))
	315	{
	316	preview->SetCurrentPage(currentPage - 1);
	317	}
	318	}
	319	}
	320
	321	void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
	322	{
	323	int zoom = GetZoomControl();
	324	if (GetPrintPreview())
	325	GetPrintPreview()->SetZoom(zoom);
	326	}
	327
	328	void wxPreviewControlBar::CreateButtons()
	329	{
	330	SetSize(0, 0, 400, 40);
	331
	332	/*
	333	#ifdef __WXMSW__
	334	int fontSize = 9;
	335	#else
	336	int fontSize = 10;
	337	#endif
	338
	339	wxFont buttonFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
	340	SetFont(buttonFont);
	341	*/
	342
	343	int buttonWidth = 65;
	344	#ifdef __WXGTK__
	345	int buttonHeight = -1;
	346	#else
	347	int buttonHeight = 24;
	348	#endif
	349
	350	int x = 5;
	351	int y = 5;
	352
	353	#ifdef __WXMOTIF__
	354	int gap = 15;
	355	#else
	356	int gap = 5;
	357	#endif
	358
	359	m_closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
	360	wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
	361
	362	x += gap + buttonWidth;
	363
	364	if (m_buttonFlags & wxPREVIEW_PRINT)
	365	{
	366	m_printButton = new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
	367	wxSize(buttonWidth, buttonHeight));
	368	x += gap + buttonWidth;
	369	}
	370
	371	if (m_buttonFlags & wxPREVIEW_PREVIOUS)
	372	{
	373	m_previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, wxT("<<"), wxPoint(x, y),
	374	wxSize(buttonWidth, buttonHeight));
	375	x += gap + buttonWidth;
	376	}
	377
	378	if (m_buttonFlags & wxPREVIEW_NEXT)
	379	{
	380	m_nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, wxT(">>"),
	381	wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
	382	x += gap + buttonWidth;
	383	}
	384
	385	if (m_buttonFlags & wxPREVIEW_ZOOM)
	386	{
	387	static const char *choices[] =
	388	{
	389	"10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
	390	"60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
	391	"120%", "150%", "200%"
	392	};
	393
	394	int n = WXSIZEOF(choices);
	395
	396	wxString* strings = new wxString[n];
	397	int i;
	398	for (i = 0; i < n; i++ )
	399	strings[i] = choices[i];
	400
	401	m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
	402	wxPoint(x, y),
	403	wxSize(100, -1),
	404	n,
	405	strings
	406	);
	407	delete[] strings;
	408
	409	SetZoomControl(m_printPreview->GetZoom());
	410	}
	411
	412	// m_closeButton->SetDefault();
	413	}
	414
	415	void wxPreviewControlBar::SetZoomControl(int zoom)
	416	{
	417	char buf[20];
	418	sprintf(buf, "%d%%", zoom);
	419	// Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
	420	if (m_zoomControl)
	421	m_zoomControl->SetStringSelection(buf);
	422	}
	423
	424	int wxPreviewControlBar::GetZoomControl()
	425	{
	426	wxChar buf[20];
	427	if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
	428	{
	429	wxStrcpy(buf, m_zoomControl->GetStringSelection());
	430	buf[wxStrlen(buf) - 1] = 0;
	431	return (int)wxAtoi(buf);
	432	}
	433	else return 0;
	434	}
	435
	436
	437	/*
	438	* Preview frame
	439	*/
	440
	441	BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
	442	EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
	443	END_EVENT_TABLE()
	444
	445	wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase preview, wxFrame parent, const wxString& title,
	446	const wxPoint& pos, const wxSize& size, long style, const wxString& name):
	447	wxFrame(parent, -1, title, pos, size, style, name)
	448	{
	449	m_printPreview = preview;
	450	m_controlBar = NULL;
	451	m_previewCanvas = NULL;
	452	}
	453
	454	wxPreviewFrame::~wxPreviewFrame()
	455	{
	456	}
	457
	458	void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
	459	{
	460	MakeModal(FALSE);
	461
	462	// Need to delete the printout and the print preview
	463	wxPrintout *printout = m_printPreview->GetPrintout();
	464	if (printout)
	465	{
	466	delete printout;
	467	m_printPreview->SetPrintout(NULL);
	468	m_printPreview->SetCanvas(NULL);
	469	m_printPreview->SetFrame(NULL);
	470	}
	471	delete m_printPreview;
	472
	473	Destroy();
	474	}
	475
	476	void wxPreviewFrame::Initialize()
	477	{
	478	CreateStatusBar();
	479
	480	CreateCanvas();
	481	CreateControlBar();
	482
	483	m_printPreview->SetCanvas(m_previewCanvas);
	484	m_printPreview->SetFrame(this);
	485
	486	// Set layout constraints here
	487
	488	// Control bar constraints
	489	wxLayoutConstraints *c1 = new wxLayoutConstraints;
	490	// int w, h;
	491	// m_controlBar->GetSize(&w, &h);
	492	int h;
	493	#if (defined(__WXMSW__) \|\| defined(__WXGTK__))
	494	h = 40;
	495	#else
	496	h = 60;
	497	#endif
	498
	499	c1->left.SameAs (this, wxLeft);
	500	c1->top.SameAs (this, wxTop);
	501	c1->right.SameAs (this, wxRight);
	502	c1->height.Absolute (h);
	503
	504	m_controlBar->SetConstraints(c1);
	505
	506	// Canvas constraints
	507	wxLayoutConstraints *c2 = new wxLayoutConstraints;
	508
	509	c2->left.SameAs (this, wxLeft);
	510	c2->top.Below (m_controlBar);
	511	c2->right.SameAs (this, wxRight);
	512	c2->bottom.SameAs (this, wxBottom);
	513
	514	m_previewCanvas->SetConstraints(c2);
	515
	516	SetAutoLayout(TRUE);
	517
	518	MakeModal(TRUE);
	519
	520	Layout();
	521	}
	522
	523	void wxPreviewFrame::CreateCanvas()
	524	{
	525	m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
	526	}
	527
	528	void wxPreviewFrame::CreateControlBar()
	529	{
	530	long buttons = wxPREVIEW_DEFAULT;
	531	if (m_printPreview->GetPrintoutForPrinting())
	532	buttons \|= wxPREVIEW_PRINT;
	533
	534	m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
	535	m_controlBar->CreateButtons();
	536	}
	537
	538	/*
	539	* Print preview
	540	*/
	541
	542	wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
	543	wxPrintout *printoutForPrinting,
	544	wxPrintData *data)
	545	{
	546	if (data)
	547	m_printDialogData = (*data);
	548
	549	Init(printout, printoutForPrinting);
	550	}
	551
	552	wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
	553	wxPrintout *printoutForPrinting,
	554	wxPrintDialogData *data)
	555	{
	556	if (data)
	557	m_printDialogData = (*data);
	558
	559	Init(printout, printoutForPrinting);
	560	}
	561
	562	void wxPrintPreviewBase::Init(wxPrintout *printout,
	563	wxPrintout *printoutForPrinting)
	564	{
	565	m_isOk = TRUE;
	566	m_previewPrintout = printout;
	567	if (m_previewPrintout)
	568	m_previewPrintout->SetIsPreview(TRUE);
	569
	570	m_printPrintout = printoutForPrinting;
	571
	572	m_previewCanvas = NULL;
	573	m_previewFrame = NULL;
	574	m_previewBitmap = NULL;
	575	m_currentPage = 1;
	576	m_currentZoom = 70;
	577	m_topMargin = 40;
	578	m_leftMargin = 40;
	579	m_pageWidth = 0;
	580	m_pageHeight = 0;
	581	m_printingPrepared = FALSE;
	582
	583	// Too soon! Moved to RenderPage.
	584	// printout->OnPreparePrinting();
	585
	586	// Get some parameters from the printout, if defined
	587	int selFrom, selTo;
	588	printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
	589	}
	590
	591	wxPrintPreviewBase::~wxPrintPreviewBase()
	592	{
	593	if (m_previewPrintout)
	594	delete m_previewPrintout;
	595	if (m_previewBitmap)
	596	delete m_previewBitmap;
	597	if (m_printPrintout)
	598	delete m_printPrintout;
	599	}
	600
	601	bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
	602	{
	603	if (m_currentPage == pageNum)
	604	return TRUE;
	605
	606	m_currentPage = pageNum;
	607	if (m_previewBitmap)
	608	{
	609	delete m_previewBitmap;
	610	m_previewBitmap = NULL;
	611	}
	612
	613	if (m_previewCanvas)
	614	{
	615	if (!RenderPage(pageNum))
	616	return FALSE;
	617	m_previewCanvas->Refresh();
	618	}
	619	return TRUE;
	620	}
	621
	622	bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
	623	{
	624	DrawBlankPage(canvas, dc);
	625
	626	if (!m_previewBitmap)
	627	if (!RenderPage(m_currentPage))
	628	return FALSE;
	629
	630	if (!m_previewBitmap)
	631	return FALSE;
	632
	633	if (!canvas)
	634	return FALSE;
	635
	636	int canvasWidth, canvasHeight;
	637	canvas->GetSize(&canvasWidth, &canvasHeight);
	638
	639	double zoomScale = ((float)m_currentZoom/(float)100);
	640	double actualWidth = (zoomScalem_pageWidthm_previewScale);
	641	// float actualHeight = (float)(zoomScalem_pageHeightm_previewScale);
	642
	643	int x = (int) ((canvasWidth - actualWidth)/2.0);
	644	if (x < m_leftMargin)
	645	x = m_leftMargin;
	646	int y = m_topMargin;
	647
	648	wxMemoryDC temp_dc;
	649	temp_dc.SelectObject(*m_previewBitmap);
	650
	651	dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
	652
	653	temp_dc.SelectObject(wxNullBitmap);
	654
	655	return TRUE;
	656	}
	657
	658	bool wxPrintPreviewBase::RenderPage(int pageNum)
	659	{
	660	wxBusyCursor busy;
	661
	662	int canvasWidth, canvasHeight;
	663
	664	if (!m_previewCanvas)
	665	{
	666	wxFAIL_MSG(_T("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));
	667
	668	return FALSE;
	669	}
	670	m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
	671
	672	double zoomScale = (m_currentZoom/100.0);
	673	int actualWidth = (int)(zoomScalem_pageWidthm_previewScale);
	674	int actualHeight = (int)(zoomScalem_pageHeightm_previewScale);
	675
	676	int x = (int)((canvasWidth - actualWidth)/2.0);
	677	if (x < m_leftMargin)
	678	x = m_leftMargin;
	679	// int y = m_topMargin;
	680
	681
	682	if (!m_previewBitmap)
	683	{
	684	m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
	685	if (!m_previewBitmap \|\| !m_previewBitmap->Ok())
	686	{
	687	if (m_previewBitmap) {
	688	delete m_previewBitmap;
	689	m_previewBitmap = NULL;
	690	}
	691	wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
	692	return FALSE;
	693	}
	694	}
	695
	696	wxMemoryDC memoryDC;
	697	memoryDC.SelectObject(*m_previewBitmap);
	698
	699	memoryDC.Clear();
	700
	701	m_previewPrintout->SetDC(&memoryDC);
	702	m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
	703
	704	// Need to delay OnPreparePrinting until here, so we have enough information.
	705	if (!m_printingPrepared)
	706	{
	707	m_previewPrintout->OnPreparePrinting();
	708	m_printingPrepared = TRUE;
	709	}
	710
	711	m_previewPrintout->OnBeginPrinting();
	712
	713	if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
	714	{
	715	wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
	716
	717	memoryDC.SelectObject(wxNullBitmap);
	718
	719	delete m_previewBitmap;
	720	m_previewBitmap = NULL;
	721	return FALSE;
	722	}
	723
	724	m_previewPrintout->OnPrintPage(pageNum);
	725	m_previewPrintout->OnEndDocument();
	726	m_previewPrintout->OnEndPrinting();
	727
	728	m_previewPrintout->SetDC(NULL);
	729
	730	memoryDC.SelectObject(wxNullBitmap);
	731
	732	wxChar buf[200];
	733	if (m_maxPage != 0)
	734	wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
	735	else
	736	wxSprintf(buf, _("Page %d"), pageNum);
	737
	738	if (m_previewFrame)
	739	m_previewFrame->SetStatusText(buf);
	740
	741	return TRUE;
	742	}
	743
	744
	745	bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
	746	{
	747	int canvasWidth, canvasHeight;
	748	canvas->GetSize(&canvasWidth, &canvasHeight);
	749
	750	float zoomScale = (float)((float)m_currentZoom/(float)100);
	751	float actualWidth = zoomScalem_pageWidthm_previewScale;
	752	float actualHeight = zoomScalem_pageHeightm_previewScale;
	753
	754	float x = (float)((canvasWidth - actualWidth)/2.0);
	755	if (x < m_leftMargin)
	756	x = (float)m_leftMargin;
	757	float y = (float)m_topMargin;
	758
	759	// Draw shadow, allowing for 1-pixel border AROUND the actual page
	760	int shadowOffset = 4;
	761	dc.SetPen(*wxBLACK_PEN);
	762	dc.SetBrush(*wxBLACK_BRUSH);
	763	/*
	764	dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
	765	*/
	766	dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
	767	dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
	768
	769	// Draw blank page allowing for 1-pixel border AROUND the actual page
	770	dc.SetPen(*wxBLACK_PEN);
	771	dc.SetBrush(*wxWHITE_BRUSH);
	772
	773	/*
	774	wxRegion update_region = canvas->GetUpdateRegion();
	775	wxRect r = update_region.GetBox();
	776
	777	printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
	778	*/
	779
	780	dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
	781
	782	return TRUE;
	783	}
	784
	785	void wxPrintPreviewBase::SetZoom(int percent)
	786	{
	787	if (m_currentZoom == percent)
	788	return;
	789
	790	m_currentZoom = percent;
	791	if (m_previewBitmap)
	792	{
	793	delete m_previewBitmap;
	794	m_previewBitmap = NULL;
	795	}
	796
	797	if (m_previewCanvas)
	798	{
	799	RenderPage(m_currentPage);
	800	((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
	801	m_previewCanvas->Clear();
	802	m_previewCanvas->Refresh();
	803	}
	804	}
	805
	806	#endif // wxUSE_PRINTING_ARCHITECTURE