void PageProvider::gotoPage(uint page)
{
qDebug() << "PageProvider::gotoPage";
if (numPages() <= page) {
qDebug() << "Invalid page number" << page;
return;
}
//request synchronously the current page
sendPageRequest(page);
if (PageCache::VALID != pageCache_[page % CACHE_SIZE].status) {
evt_.exec();
}
//asynchronous requests (make sure that the entire cache is marked as filled)
if (1 <= page) {
sendPageRequest(page-1);
}
else if ((numPages() > (page+2))) {
pageCache_[(page+2) % CACHE_SIZE].status = PageCache::VALID;
}
if (numPages() > (page+1)) {
sendPageRequest(page+1);
}
else if (2 <= page) {
pageCache_[(page-2) % CACHE_SIZE].status = PageCache::VALID;
}
}
void QgsComposition::setNumPages( int pages )
{
int currentPages = numPages();
int diff = pages - currentPages;
if ( diff >= 0 )
{
for ( int i = 0; i < diff; ++i )
{
addPaperItem();
}
}
else
{
diff = -diff;
for ( int i = 0; i < diff; ++i )
{
delete mPages.last();
mPages.removeLast();
}
}
// update the corresponding variable
QgsExpression::setSpecialColumn( "$numpages", QVariant(( int )numPages() ) );
emit nPagesChanged();
}
void QgsComposition::print( QPrinter &printer )
{
//set resolution based on composer setting
printer.setFullPage( true );
printer.setColorMode( QPrinter::Color );
//set user-defined resolution
printer.setResolution( printResolution() );
QPainter p( &printer );
//QgsComposition starts page numbering at 0
int fromPage = ( printer.fromPage() < 1 ) ? 0 : printer.fromPage() - 1 ;
int toPage = ( printer.toPage() < 1 ) ? numPages() - 1 : printer.toPage() - 1;
if ( mPrintAsRaster )
{
for ( int i = fromPage; i <= toPage; ++i )
{
if ( i > fromPage )
{
printer.newPage();
}
QImage image = printPageAsRaster( i );
if ( !image.isNull() )
{
QRectF targetArea( 0, 0, image.width(), image.height() );
p.drawImage( targetArea, image, targetArea );
}
}
}
if ( !mPrintAsRaster )
{
for ( int i = fromPage; i <= toPage; ++i )
{
if ( i > fromPage )
{
printer.newPage();
}
renderPage( &p, i );
}
}
}
bool PageProvider::setDocument(const QString &filePath)
{
qDebug() << "PageProvider::setDocument" << filePath;
bool out = false;
if (NULL != doc_) {
if(true == doc_->load(filePath)) {
cacheSize_ = qMin(static_cast<uint>(pageCache_.count()), numPages());
currentPage_ = -1;
filePath_ = filePath;
out = true;
}
else if (!filePath_.isEmpty()) {
//an error occured -> restore previous document
out = (EXIT_SUCCESS == doc_->load(filePath_));
}
}
return out;
}
void QgsComposition::setNumPages( int pages )
{
int currentPages = numPages();
int diff = pages - currentPages;
if ( diff >= 0 )
{
for ( int i = 0; i < diff; ++i )
{
addPaperItem();
}
}
else
{
diff = -diff;
for ( int i = 0; i < diff; ++i )
{
delete mPages.last();
mPages.removeLast();
}
}
emit nPagesChanged();
}
void QgsComposition::doPrint( QPrinter& printer, QPainter& p )
{
//QgsComposition starts page numbering at 0
int fromPage = ( printer.fromPage() < 1 ) ? 0 : printer.fromPage() - 1 ;
int toPage = ( printer.toPage() < 1 ) ? numPages() - 1 : printer.toPage() - 1;
if ( mPrintAsRaster )
{
for ( int i = fromPage; i <= toPage; ++i )
{
if ( i > fromPage )
{
printer.newPage();
}
QImage image = printPageAsRaster( i );
if ( !image.isNull() )
{
QRectF targetArea( 0, 0, image.width(), image.height() );
p.drawImage( targetArea, image, targetArea );
}
}
}
if ( !mPrintAsRaster )
{
for ( int i = fromPage; i <= toPage; ++i )
{
if ( i > fromPage )
{
printer.newPage();
}
renderPage( &p, i );
}
}
}
