/***************************************************************************
             mreportviewer.cpp  -  Kugar QT report viewer widget
             -------------------
   begin     : Fri Aug 13 1999
   copyright : (C) 1999 by Mutiny Bay Software
   email     : info@mutinybaysoftware.com
   copyright : (C) 2002 Alexander Dymo
   email     : cloudtemple@mksat.net
***************************************************************************/

#include <qapplication.h>
#include <kmessagebox.h>
#include <kprinter.h>
#include <klocale.h>

#include "mreportviewer.h"

namespace Kugar
{

/** Constructor */
MReportViewer::MReportViewer( MReportEngine *engine, QWidget *parent, const char *name ) : QWidget( parent, name ), progress( 0 )
{
    rptEngine = engine;
    rptEngine->addRef();
    init();
}

MReportViewer::MReportViewer( QWidget *parent, const char *name ) : QWidget( parent, name ), progress( 0 )
{
    // Create the scrollview
    rptEngine = new MReportEngine();
    init();
}

void MReportViewer::init()
{
    scroller = new QScrollView( this );

    // Connect the rendering update signal and slot
    connect( rptEngine, SIGNAL( signalRenderStatus( int ) ),
             SLOT( slotRenderProgress( int ) ) );

    connect( rptEngine, SIGNAL( preferedTemplate( const QString & ) ),
             SIGNAL( preferedTemplate( const QString & ) ) );

    // Get the current color palette
    QPalette p = palette();
    QColorGroup g = p.active();

    // Set the scroller's background color
    scroller->viewport() ->setBackgroundColor( g.mid() );

    // Create the report display widget
    display = new MPageDisplay( scroller->viewport() );

    // Set the display's default background color
    display->setBackgroundColor( white );

    // Add the display to the scrollview
    scroller->addChild( display );

    //Hide the display, we don't have a report yet ..
    display->hide();
}

/** Destructor */
MReportViewer::~MReportViewer()
{
    clearReport();
    rptEngine->removeRef();
}

/** Report viewer's paint event */
void MReportViewer::paintEvent( QPaintEvent* event )
{}

/** Report viewer's resize event */
void MReportViewer::resizeEvent( QResizeEvent* event )
{
    scroller->resize( event->size() );
}

// Set the report's data from an in-line string.

bool MReportViewer::setReportData( const QString &data )
{
    return rptEngine -> setReportData( data );
}


// Set the report's data from an i/o device.

bool MReportViewer::setReportData( QIODevice *dev )
{
    return rptEngine -> setReportData( dev );
}


// Set the report's template from an in-line string.

bool MReportViewer::setReportTemplate( const QString &tpl )
{
    return rptEngine -> setReportTemplate( tpl );
}


// Set the report's template from an i/o device.

bool MReportViewer::setReportTemplate( QIODevice *dev )
{
    return rptEngine -> setReportTemplate( dev );
}


/** Generates the report's page collection */
bool MReportViewer::renderReport()
{
    // Render the report
    report = rptEngine->renderReport();

    // Display the first page of the report
    if ( report && report->getFirstPage() != 0 )
    {
        display->setPageDimensions( report->pageDimensions() );
        display->setPage( report->getFirstPage() );
        display->show();

        return true;
    }

    return false;
}

/** Clears the report's page collection */
void MReportViewer::clearReport()
{
    // Hide the display
    display->hide();
}

/** Prints the rendered report to the selected printer - displays KDE print dialog */
void MReportViewer::printReport()
{
    // Check for a report
    if ( !report )
        return ;

    // Get the page count
    int cnt = report->pageCount();

    // Check if there is a report or any pages to print
    if ( cnt == 0 )
    {
        KMessageBox::error( this, i18n( "There are no pages in the\nreport to print." ) );
        return ;
    }

    // Set the printer dialog
    KPrinter printer;

    setupPrinter( printer );
    if ( printer.setup( this ) )
        printReport( printer );
}

/** Shows the first page in the report */
void MReportViewer::slotFirstPage()
{
    QPicture * page;

    if ( !report )
        return ;

    if ( ( page = report->getFirstPage() ) != 0 )
    {
        display->setPage( page );
        display->repaint();
    }
}

/** Shows the next page in the report */
void MReportViewer::slotNextPage()
{
    QPicture * page;

    if ( !report )
        return ;

    int index = report->getCurrentIndex();

    if ( ( page = report->getNextPage() ) != 0 )
    {
        display->setPage( page );
        display->repaint();
    }
    else
        report->setCurrentPage( index );
}

/** Shows the prevoius page in the report */
void MReportViewer::slotPrevPage()
{
    QPicture * page;

    if ( !report )
        return ;

    int index = report->getCurrentIndex();

    if ( ( page = report->getPreviousPage() ) != 0 )
    {
        display->setPage( page );
        display->repaint();
    }
    else
        report->setCurrentPage( index );
}

/** Shows the last page in the report */
void MReportViewer::slotLastPage()
{
    QPicture * page;

    if ( !report )
        return ;

    if ( ( page = report->getLastPage() ) != 0 )
    {
        display->setPage( page );
        display->repaint();
    }
}

/** Cancel printing of the report */
void MReportViewer::slotCancelPrinting()
{
    printer->abort();
}

/** Updates rendering progress */
void MReportViewer::slotRenderProgress( int p )
{

    // Check if the dialog was created
    if ( progress == 0 )
    {
        totalSteps = rptEngine->getRenderSteps();
        progress = new QProgressDialog( i18n("Creating report..."), i18n("Cancel"),
                                        totalSteps, this, "progress", true );
        progress->setMinimumDuration( M_PROGRESS_DELAY );
    }

    // Update the dialog
    progress->setProgress( p );
    qApp->processEvents();

    // Check if the action was canceled
    if ( progress->wasCancelled() )
    {
        progress->setProgress( totalSteps );
        rptEngine->slotCancelRendering();
    }

    // Cleanup dialog if necessary
    if ( progress->progress() == -1 )
    {
        delete progress;
        progress = 0;
    }
}


// Return the preferred size.

QSize MReportViewer::sizeHint() const
{
    return scroller -> sizeHint();
}

void MReportViewer::printReport( KPrinter &printer )
{
    // Check for a report
    if ( !report )
        return ;

    // Get the page count
    int cnt = report->pageCount();

    // Check if there is a report or any pages to print
    if ( cnt == 0 )
    {
        KMessageBox::error( this, i18n( "There are no pages in the\nreport to print." ) );
        return ;
    }


    QPicture* page;
    QPainter painter;
    bool printRev;

    // Save the viewer's page index
    int viewIdx = report->getCurrentIndex();

    // Check the order we are printing the pages
    if ( printer.pageOrder() == KPrinter::FirstPageFirst )
        printRev = false;
    else
        printRev = true;

    // Get the count of pages and copies to print
    int printFrom = printer.fromPage() - 1;
    int printTo = printer.toPage();
    int printCnt = ( printTo - printFrom );
    int printCopies = printer.numCopies();
    int totalSteps = printCnt * printCopies;
    int currentStep = 1;

    // Set copies to 1, KPrinter copies does not appear to work ...
    printer.setNumCopies( 1 );

    // Setup the progress dialog
    QProgressDialog progress( i18n( "Printing report..." ),
                              i18n( "Cancel" ),
                              totalSteps, this, "progress", true );
    progress.setMinimumDuration( M_PROGRESS_DELAY );
    QObject::connect( &progress, SIGNAL( cancelled() ), this, SLOT( slotCancelPrinting() ) );
    progress.setProgress( 0 );
    qApp->processEvents();

    // Start the printer
    painter.begin( &printer );

    // Print each copy
    for ( int j = 0; j < printCopies; j++ )
    {
        // Print each page in the collection
        for ( int i = printFrom ; i < printTo; i++, currentStep++ )
        {
            if ( !printer.aborted() )
            {
                progress.setProgress( currentStep );
                qApp->processEvents();

                if ( printRev )
                    report->setCurrentPage( ( printCnt == 1 ) ? i : ( printCnt - 1 ) - i );
                else
                    report->setCurrentPage( i );

                page = report->getCurrentPage();
                page->play( &painter );
                if ( i < printCnt - 1 )
                    printer.newPage();
            }
            else
            {
                j = printCopies;
                break;
            }
        }
        if ( j < printCopies - 1 )
            printer.newPage();
    }

    // Cleanup printing
    setCursor( arrowCursor );
    painter.end();
    report->setCurrentPage( viewIdx );
}

void MReportViewer::setupPrinter( KPrinter &printer )
{
    int cnt = report->pageCount();

    printer.setPageSize( ( KPrinter::PageSize ) report->pageSize() );
    printer.setOrientation( ( KPrinter::Orientation ) report->pageOrientation() );
    printer.setMinMax( 1, cnt );
    printer.setFromTo( 1, cnt );
    printer.setFullPage( true );
}

void MReportViewer::printReportSilent( int printFrom, int printTo, int printCopies, QString printerName )
{
    int cnt = report->pageCount();
    if ( printFrom == -1 )
        printFrom = 1;
    if ( printTo == -1 )
        printTo = cnt;
    if ( printCopies == -1 )
        printCopies = 1;


    printer = new KPrinter();

    printer->setPageSize( ( KPrinter::PageSize ) report->pageSize() );
    printer->setOrientation( ( KPrinter::Orientation ) report->pageOrientation() );
    printer->setMinMax( 1, cnt );
    printer->setFullPage( true );
    printer->setNumCopies( printCopies );
    printer->setFromTo( printFrom, printTo );
    if ( !printerName.isEmpty() )
        printer->setPrinterName( printerName );

    printReport( *printer );

    delete printer;
}

}

#include "mreportviewer.moc"