mirror of
https://invent.kde.org/graphics/okular
synced 2024-10-13 19:32:25 +00:00
0ae229ce9a
svn path=/trunk/kdegraphics/kdvi/; revision=57723
382 lines
9.3 KiB
C++
382 lines
9.3 KiB
C++
#include <qobject.h>
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#include <qlabel.h>
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#include <qstring.h>
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#include <qscrollview.h>
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#include <qimage.h>
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#include <qpixmap.h>
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#include <kaction.h>
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#include <kaboutdata.h>
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#include <kaboutdialog.h>
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#include <kapp.h>
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#include <kbugreport.h>
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#include <kconfig.h>
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#include <klocale.h>
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#include <kdebug.h>
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#include <kglobal.h>
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#include <kimageeffect.h>
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#include <kinstance.h>
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#include "print.h"
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#include "optiondialog.h"
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#include "kdvi_multipage.moc"
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extern "C"
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{
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void *init_libkdvi()
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{
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return new KDVIMultiPageFactory;
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}
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};
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KInstance *KDVIMultiPageFactory::s_instance = 0L;
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KDVIMultiPageFactory::KDVIMultiPageFactory()
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{
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}
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KDVIMultiPageFactory::~KDVIMultiPageFactory()
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{
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if (s_instance)
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delete s_instance;
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s_instance = 0;
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}
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KParts::Part *KDVIMultiPageFactory::createPart( QWidget *parentWidget, const char *widgetName, QObject *parent, const char *name, const char *, const QStringList & )
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{
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KParts::Part *obj = new KDVIMultiPage(parentWidget, widgetName, parent, name);
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emit objectCreated(obj);
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return obj;
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}
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KInstance *KDVIMultiPageFactory::instance()
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{
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if (!s_instance)
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s_instance = new KInstance("kdvi");
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return s_instance;
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}
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KDVIMultiPage::KDVIMultiPage(QWidget *parentWidget, const char *widgetName, QObject *parent, const char *name)
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: KMultiPage(parentWidget, widgetName, parent, name), window(0), options(0)
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{
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timer_id = -1;
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setInstance(KDVIMultiPageFactory::instance());
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window = new dviWindow(300, 1.0, "cx", 0, scrollView());
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preferencesChanged();
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new KAction(i18n("&DVI Options"), 0, this,
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SLOT(doSettings()), actionCollection(),
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"settings_dvi");
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new KAction(i18n("About the KDVI plugin..."), 0, this,
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SLOT(about()), actionCollection(),
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"about_kdvi");
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new KAction(i18n("Help on the KDVI plugin..."), 0, this,
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SLOT(helpme()), actionCollection(),
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"help_dvi");
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new KAction(i18n("Report Bug in the KDVI plugin..."), 0, this,
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SLOT(bugform()), actionCollection(),
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"bug_dvi");
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setXMLFile("kdvi_part.rc");
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scrollView()->addChild(window);
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connect(window, SIGNAL(request_goto_page(int, int)), this, SLOT(goto_page(int, int) ) );
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readSettings();
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}
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KDVIMultiPage::~KDVIMultiPage()
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{
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if (timer_id != -1)
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killTimer(timer_id);
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timer_id = -1;
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writeSettings();
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}
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bool KDVIMultiPage::openFile()
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{
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window->setFile(m_file);
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window->gotoPage(1);
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window->changePageSize(); // This also calles drawPage();
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emit numberOfPages(window->totalPages());
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scrollView()->resizeContents(window->width(), window->height());
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emit previewChanged(true);
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return true;
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}
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bool KDVIMultiPage::closeURL()
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{
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window->setFile("");
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scrollView()->resizeContents(0, 0);
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emit previewChanged(false);
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return true;
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}
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QStringList KDVIMultiPage::fileFormats()
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{
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QStringList r;
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r << i18n("*.dvi|DVI files (*.dvi)");
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return r;
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}
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bool KDVIMultiPage::gotoPage(int page)
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{
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window->gotoPage(page+1);
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emit previewChanged(true);
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return true;
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}
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void KDVIMultiPage::goto_page(int page, int y)
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{
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window->gotoPage(page+1);
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scrollView()->ensureVisible(scrollView()->width()/2, y );
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emit previewChanged(true);
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emit pageInfo(window->totalPages(), page );
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}
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double KDVIMultiPage::setZoom(double zoom)
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{
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window->setZoom(zoom);
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scrollView()->resizeContents(window->width(), window->height());
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return zoom;
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}
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extern unsigned int page_w, page_h;
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double KDVIMultiPage::zoomForHeight(int height)
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{
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return (window->zoom() * (double)height)/(double)page_h;
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}
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double KDVIMultiPage::zoomForWidth(int width)
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{
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return (window->zoom() * (double)width)/(double)page_w;
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}
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void KDVIMultiPage::setPaperSize(double w, double h)
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{
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window->setPaper(w, h);
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}
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bool KDVIMultiPage::preview(QPainter *p, int w, int h)
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{
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QPixmap *map = window->pix();
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if (!map)
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return false;
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// TODO: use higher quality preview if anti-aliasing?
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//p->drawImage(0, 0, window->pix()->convertToImage().smoothScale(w,h));
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p->scale((double)w/(double)map->width(), (double)h/(double)map->height());
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p->drawPixmap(0, 0, *map);
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return true;
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}
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void KDVIMultiPage::doSettings()
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{
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if (options) {
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options->show();
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return;
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}
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options = new OptionDialog(window);
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connect(options, SIGNAL(preferencesChanged()), this, SLOT(preferencesChanged()));
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options->show();
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}
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void KDVIMultiPage::about()
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{
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KAboutDialog *ab = new KAboutDialog(KAboutDialog::AbtAppStandard,
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i18n("the KDVI plugin"),
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KAboutDialog::Close, KAboutDialog::Close);
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ab->setProduct("kdvi", "0.9", QString::null, QString::null);
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ab->addTextPage (i18n("About"),
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i18n("A previewer for Device Independent files (DVI files) produced "
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"by the TeX typesetting system.<br>"
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"Based on kdvi 0.4.3 and on xdvik, version 18f.<br><hr>"
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"For latest information, visit "
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"<a href=\"http://devel-home.kde.org/~kdvi\">KDVI's Homepage</a>."),
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true);
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ab->addTextPage (i18n("Authors"),
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i18n("Markku Hinhala<br>"
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"Author of kdvi 0.4.3"
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"<hr>"
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"Stefan Kebekus<br>"
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"<a href=\"http://btm8x5.mat.uni-bayreuth.de/~kebekus\">"
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"http://btm8x5.mat.uni-bayreuth.de/~kebekus</a><br>"
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"<a href=\"mailto:kebekus@kde.org\">kebekus@kde.org</a><br>"
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"Current maintainer of kdvi. Major rewrite of version 0.4.3."
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"Implementation of hyperlinks.<br>"
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"<hr>"
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"Nicolai Langfeldt<br>"
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" Maintainer of xdvik"
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"<hr>"
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"Paul Vojta<br>"
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" Author of xdvi<br>"
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"<hr>"
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"Many others. Really, lots of people who were involved in kdvi, xdvik and "
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"xdvi. I apologize to those who I did not mention here. Please send me an "
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"email if you think your name belongs here."),
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true);
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ab->show();
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}
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void KDVIMultiPage::bugform()
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{
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KAboutData *kab = new KAboutData("kdvi", i18n("KDVI"), "0.9", 0, 0, 0, 0, 0);
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KBugReport *kbr = new KBugReport(0, true, kab );
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kbr->show();
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}
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void KDVIMultiPage::helpme()
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{
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kapp->invokeHelp( "", "kdvi" );
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}
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void KDVIMultiPage::preferencesChanged()
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{
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#ifdef DEBUG
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kdDebug(4300) << "preferencesChanged" << endl;
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#endif
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KConfig *config = instance()->config();
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QString s;
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config->reparseConfiguration();
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config->setGroup( "kdvi" );
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s = config->readEntry( "FontPath" );
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if ( !s.isEmpty() && s != window->fontPath() )
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window->setFontPath( s );
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// Important! The default values here must be the same as in optiondialog.cpp
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int basedpi = config->readNumEntry( "BaseResolution" );
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if ( basedpi <= 0 )
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config->writeEntry( "BaseResolution", basedpi = 300 );
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if ( basedpi != window->resolution() )
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window->setResolution( basedpi );
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QString mfmode = config->readEntry( "MetafontMode" );
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if ( mfmode.isNull() )
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config->writeEntry( "MetafontMode", mfmode = "cx" );
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if ( mfmode != window->metafontMode() )
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window->setMetafontMode( mfmode );
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int makepk = config->readNumEntry( "MakePK" );
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if ( makepk != window->makePK() )
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window->setMakePK( makepk );
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int showPS = config->readNumEntry( "ShowPS", 1 );
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if (showPS != window->showPS())
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window->setShowPS(showPS);
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int showHyperLinks = config->readNumEntry( "ShowHyperLinks", 1 );
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if (showHyperLinks != window->showHyperLinks())
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window->setShowHyperLinks(showHyperLinks);
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}
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bool KDVIMultiPage::print(const QStrList &pages, int current)
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{
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Print * printdlg = new Print(window, "printdlg");
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printdlg->setFile(m_file);
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printdlg->setCurrentPage(current+1, window->totalPages());
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printdlg->setMarkList(&pages);
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printdlg->exec();
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delete printdlg;
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return true;
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}
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// Explanation of the timerEvent.
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//
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// This is a dreadful hack. The problem we adress with this timer
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// event is the following: the kviewshell has a KDirWatch object which
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// looks at the DVI file and calls reload() when the object has
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// changed. That works very nicely in principle, but in practise, when
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// TeX runs for several seconds over a complicated file, this does not
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// work at all. First, most of the time, while TeX is still writing,
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// the file is invalid. Thus, reload() is very often called when the
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// DVI file is bad. We solve this problem by checking the file
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// first. If the file is bad, we do not reload. Second, when the file
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// finally becomes good, it very often happens that KDirWatch does not
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// notify us anymore. Whether this is a bug or a side effect of a
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// feature of KDirWatch, I dare not say. We remedy that problem by
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// using a timer: when reload() was called on a bad file, we
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// automatically come back (via the timerEvent() function) every
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// second and check if the file becaome good. If so, we stop the
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// timer. It may well happen that KDirWatch calls us several times
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// while we are waiting for the file to become good, but that does not
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// do any harm.
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//
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// -- Stefan Kebekus.
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void KDVIMultiPage::timerEvent( QTimerEvent *e )
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{
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#ifdef DEBUG
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kdDebug(4300) << "Timer Event " << endl;
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#endif
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reload();
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}
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void KDVIMultiPage::reload()
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{
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#ifdef DEBUG
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kdDebug(4300) << "Reload file " << m_file << endl;
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#endif
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if (window->correctDVI(m_file)) {
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killTimer(timer_id);
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timer_id = -1;
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int currsav = window->curr_page();
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window->setFile(m_file);
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window->gotoPage(currsav);
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emit pageInfo(window->totalPages(), window->curr_page()-1 ); // We don't use "currsav" here, because that page may no longer exist. In that case, gotoPage already selected another page.
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scrollView()->resizeContents(window->width(), window->height());
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emit previewChanged(true);
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} else {
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if (timer_id == -1)
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timer_id = startTimer(1000);
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}
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}
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