PDFWidget.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2010
   4 //     Stefan Bund <info@j32.de>
   5
   6 /** \file
   7     \brief PDFWidget non-inline non-template implementation */
   8
   9 #include "PDFWidget.hh"
  10 //#include "PDFWidget.ih"
  11
  12 // Custom includes
  13 #include <iostream>
  14 #include <QNetworkRequest>
  15 #include <QNetworkReply>
  16 #include <QKeyEvent>
  17 #include <QWebView>
  18 #include <QWebFrame>
  19 #include <QApplication>
  20 #include <QClipboard>
  21
  22 //#include "PDFWidget.mpp"
  23 #define prefix_
  24 ///////////////////////////////cc.p////////////////////////////////////////
  25
  26 prefix_ pykit::PDFWidget::PDFWidget(QString const & id, QNetworkAccessManager * manager,
  27                                     QWidget * parent)
  28     : QLabel(parent), id_ (id), manager_ (manager), currentPage_ (0), rubberBand_ (0)
  29
  30 {
  31     QWebView * webView (dynamic_cast<QWebView*>(parent));
  32     if (webView && !id_.isEmpty())
  33         webView->page()->mainFrame()->addToJavaScriptWindowObject(id_,this);
  34 }
  35
  36 prefix_ pykit::PDFWidget::PDFWidget(QString const & id, QString const & document,
  37                                     QNetworkAccessManager * manager, QWidget * parent)
  38     : QLabel(parent), id_ (id), manager_ (manager), currentPage_ (0), rubberBand_ (0)
  39
  40 {
  41     setFocusPolicy(Qt::WheelFocus);
  42     document_.reset(Poppler::Document::load(document));
  43     QWebView * webView (dynamic_cast<QWebView*>(parent));
  44     if (webView && !id_.isEmpty())
  45         webView->page()->mainFrame()->addToJavaScriptWindowObject(id_,this);
  46     documentSetup();
  47 }
  48
  49 prefix_ pykit::PDFWidget::~PDFWidget()
  50 {
  51     if (rubberBand_)
  52         delete rubberBand_;
  53 }
  54
  55
  56 prefix_ void pykit::PDFWidget::load(QUrl const & url)
  57 {
  58     QNetworkRequest request (url);
  59     QNetworkReply * reply (manager_->get(request));
  60     connect(reply, SIGNAL(finished()), this, SLOT(netLoadDocument()));
  61 }
  62
  63 prefix_ void pykit::PDFWidget::resizeEvent(QResizeEvent *)
  64 {
  65     if (! document_)
  66         return;
  67     QSizeF pageSize (document_->page(currentPage_)->pageSizeF());
  68     double n = 72.0 * width() / pageSize.width();
  69     if (n != dpi_) {
  70         dpi_ = n;
  71         showPage();
  72     }
  73 }
  74
  75 prefix_ void pykit::PDFWidget::mousePressEvent(QMouseEvent * event)
  76 {
  77     origin_ = event->pos();
  78     if (! rubberBand_)
  79         rubberBand_ = new QRubberBand(QRubberBand::Rectangle, this);
  80     rubberBand_->setGeometry(QRect(origin_, QSize()));
  81     rubberBand_->show();
  82 }
  83
  84 prefix_ void pykit::PDFWidget::mouseMoveEvent(QMouseEvent * event)
  85 {
  86     if (rubberBand_)
  87         rubberBand_->setGeometry(QRect(origin_, event->pos()).normalized());
  88 }
  89
  90 prefix_ void pykit::PDFWidget::mouseReleaseEvent(QMouseEvent * event)
  91 {
  92     if (rubberBand_) {
  93         QMatrix matrix (dpi_ / 72.0, 0, 0, dpi_ / 72.0, 0, 0);
  94         QRectF rect (matrix.inverted().mapRect(QRect(rubberBand_->pos(), rubberBand_->size())));
  95         QString text = document_->page(currentPage_)->text(rect);
  96         if (! text.isEmpty())
  97             QApplication::clipboard()->setText(text);
  98     }
  99 }
 100
 101 prefix_ void pykit::PDFWidget::netLoadDocument()
 102 {
 103     QNetworkReply * reply = static_cast<QNetworkReply*>(sender());
 104     if (reply->error() != QNetworkReply::NoError)
 105         return;
 106     QByteArray data (reply->read(reply->size()));
 107     document_.reset(Poppler::Document::loadFromData(data));
 108     documentSetup();
 109     reply->deleteLater();
 110 }
 111
 112 prefix_ void pykit::PDFWidget::documentSetup()
 113 {
 114     if (! document_)
 115         return;
 116     document_->setRenderHint(Poppler::Document::Antialiasing, true);
 117     document_->setRenderHint(Poppler::Document::TextAntialiasing, true);
 118     document_->setRenderHint(Poppler::Document::TextHinting, false);
 119     resizeEvent(0);
 120     showPage();
 121 }
 122
 123 prefix_ void pykit::PDFWidget::showPage()
 124 {
 125     if (! document_)
 126         return;
 127     QImage image (document_->page(currentPage_)->renderToImage(
 128                       dpi_, dpi_, 0, 0, width(), height()));
 129     setPixmap(QPixmap::fromImage(image));
 130 }
 131
 132 ///////////////////////////////cc.e////////////////////////////////////////
 133 #undef prefix_
 134 //#include "PDFWidget.mpp"
 135
 136 \f
 137 // Local Variables:
 138 // mode: c++
 139 // fill-column: 100
 140 // comment-column: 40
 141 // c-file-style: "j32"
 142 // indent-tabs-mode: nil
 143 // ispell-local-dictionary: "american"
 144 // compile-command: "make"
 145 // End: