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PDF4QT/PdfForQtViewer/pdfviewermainwindow.cpp

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// Copyright (C) 2019 Jakub Melka
//
// This file is part of PdfForQt.
//
// PdfForQt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// PdfForQt is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
#include "pdfviewermainwindow.h"
#include "ui_pdfviewermainwindow.h"
#include "pdfaboutdialog.h"
#include "pdfviewersettingsdialog.h"
#include "pdfsidebarwidget.h"
#include "pdfdocumentreader.h"
#include "pdfvisitor.h"
#include "pdfstreamfilters.h"
#include "pdfdrawwidget.h"
#include "pdfdrawspacecontroller.h"
#include "pdfrenderingerrorswidget.h"
#include "pdffont.h"
#include "pdfitemmodels.h"
#include "pdfutils.h"
#include <QSettings>
#include <QFileDialog>
#include <QMessageBox>
#include <QCloseEvent>
#include <QApplication>
#include <QDesktopWidget>
#include <QStandardPaths>
#include <QDockWidget>
#include <QTreeView>
#include <QLayout>
#include <QHeaderView>
#include <QInputDialog>
#include <QSpinBox>
#include <QLabel>
#include <QDoubleSpinBox>
#include <QDesktopServices>
#ifdef Q_OS_WIN
#include "Windows.h"
#endif
namespace pdfviewer
{
PDFViewerMainWindow::PDFViewerMainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::PDFViewerMainWindow),
m_settings(new PDFViewerSettings(this)),
m_pdfWidget(nullptr),
m_sidebarDockWidget(nullptr),
m_optionalContentActivity(nullptr),
m_pageNumberSpinBox(nullptr),
m_pageNumberLabel(nullptr),
m_pageZoomSpinBox(nullptr),
m_isLoadingUI(false),
m_progress(new pdf::PDFProgress(this)),
m_taskbarButton(new QWinTaskbarButton(this)),
m_progressTaskbarIndicator(nullptr)
{
ui->setupUi(this);
// Initialize task bar progress
m_progressTaskbarIndicator = m_taskbarButton->progress();
// Initialize shortcuts
ui->actionOpen->setShortcut(QKeySequence::Open);
ui->actionClose->setShortcut(QKeySequence::Close);
ui->actionQuit->setShortcut(QKeySequence::Quit);
ui->actionZoom_In->setShortcut(QKeySequence::ZoomIn);
ui->actionZoom_Out->setShortcut(QKeySequence::ZoomOut);
connect(ui->actionOpen, &QAction::triggered, this, &PDFViewerMainWindow::onActionOpenTriggered);
connect(ui->actionClose, &QAction::triggered, this, &PDFViewerMainWindow::onActionCloseTriggered);
connect(ui->actionQuit, &QAction::triggered, this, &PDFViewerMainWindow::onActionQuitTriggered);
auto createGoToAction = [this](QMenu* menu, QString text, QKeySequence::StandardKey key, pdf::PDFDrawWidgetProxy::Operation operation, QString iconPath)
{
QIcon icon;
icon.addFile(iconPath);
QAction* action = new QAction(icon, text, this);
action->setShortcut(key);
menu->addAction(action);
auto onTriggered = [this, operation]()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(operation);
};
connect(action, &QAction::triggered, this, onTriggered);
return action;
};
QAction* actionGoToDocumentStart = createGoToAction(ui->menuGoTo, tr("Go to document start"), QKeySequence::MoveToStartOfDocument, pdf::PDFDrawWidgetProxy::NavigateDocumentStart, ":/resources/previous-start.svg");
QAction* actionGoToDocumentEnd = createGoToAction(ui->menuGoTo, tr("Go to document end"), QKeySequence::MoveToEndOfDocument, pdf::PDFDrawWidgetProxy::NavigateDocumentEnd, ":/resources/next-end.svg");
QAction* actionGoToNextPage = createGoToAction(ui->menuGoTo, tr("Go to next page"), QKeySequence::MoveToNextPage, pdf::PDFDrawWidgetProxy::NavigateNextPage, ":/resources/next-page.svg");
QAction* actionGoToPreviousPage = createGoToAction(ui->menuGoTo, tr("Go to previous page"), QKeySequence::MoveToPreviousPage, pdf::PDFDrawWidgetProxy::NavigatePreviousPage, ":/resources/previous-page.svg");
createGoToAction(ui->menuGoTo, tr("Go to next line"), QKeySequence::MoveToNextLine, pdf::PDFDrawWidgetProxy::NavigateNextStep, ":/resources/next.svg");
createGoToAction(ui->menuGoTo, tr("Go to previous line"), QKeySequence::MoveToPreviousLine, pdf::PDFDrawWidgetProxy::NavigatePreviousStep, ":/resources/previous.svg");
m_pageNumberSpinBox = new QSpinBox(this);
m_pageNumberLabel = new QLabel(this);
m_pageNumberSpinBox->setFixedWidth(adjustDpiX(80));
m_pageNumberSpinBox->setAlignment(Qt::AlignCenter);
connect(m_pageNumberSpinBox, &QSpinBox::editingFinished, this, &PDFViewerMainWindow::onPageNumberSpinboxEditingFinished);
// Page control
ui->mainToolBar->addSeparator();
ui->mainToolBar->addAction(actionGoToDocumentStart);
ui->mainToolBar->addAction(actionGoToPreviousPage);
ui->mainToolBar->addWidget(m_pageNumberSpinBox);
ui->mainToolBar->addWidget(m_pageNumberLabel);
ui->mainToolBar->addAction(actionGoToNextPage);
ui->mainToolBar->addAction(actionGoToDocumentEnd);
// Zoom
ui->mainToolBar->addSeparator();
ui->mainToolBar->addAction(ui->actionZoom_In);
ui->mainToolBar->addAction(ui->actionZoom_Out);
m_pageZoomSpinBox = new QDoubleSpinBox(this);
m_pageZoomSpinBox->setMinimum(pdf::PDFDrawWidgetProxy::getMinZoom() * 100);
m_pageZoomSpinBox->setMaximum(pdf::PDFDrawWidgetProxy::getMaxZoom() * 100);
m_pageZoomSpinBox->setDecimals(2);
m_pageZoomSpinBox->setSuffix(tr("%"));
m_pageZoomSpinBox->setFixedWidth(adjustDpiX(80));
m_pageZoomSpinBox->setAlignment(Qt::AlignVCenter | Qt::AlignRight);
connect(m_pageZoomSpinBox, &QDoubleSpinBox::editingFinished, this, &PDFViewerMainWindow::onPageZoomSpinboxEditingFinished);
ui->mainToolBar->addWidget(m_pageZoomSpinBox);
// Fit page, width, height
ui->mainToolBar->addAction(ui->actionFitPage);
ui->mainToolBar->addAction(ui->actionFitWidth);
ui->mainToolBar->addAction(ui->actionFitHeight);
connect(ui->actionZoom_In, &QAction::triggered, this, [this] { m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomIn); });
connect(ui->actionZoom_Out, &QAction::triggered, this, [this] { m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomOut); });
readSettings();
m_pdfWidget = new pdf::PDFWidget(m_settings->getRendererEngine(), m_settings->isMultisampleAntialiasingEnabled() ? m_settings->getRendererSamples() : -1, this);
setCentralWidget(m_pdfWidget);
setFocusProxy(m_pdfWidget);
m_pdfWidget->updateCacheLimits(m_settings->getCompiledPageCacheLimit() * 1024, m_settings->getThumbnailsCacheLimit(), m_settings->getFontCacheLimit(), m_settings->getInstancedFontCacheLimit());
m_sidebarWidget = new PDFSidebarWidget(m_pdfWidget->getDrawWidgetProxy(), this);
m_sidebarDockWidget = new QDockWidget(tr("Sidebar"), this);
m_sidebarDockWidget->setObjectName("SidebarDockWidget");
m_sidebarDockWidget->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
m_sidebarDockWidget->setWidget(m_sidebarWidget);
addDockWidget(Qt::LeftDockWidgetArea, m_sidebarDockWidget);
m_sidebarDockWidget->hide();
connect(m_sidebarWidget, &PDFSidebarWidget::actionTriggered, this, &PDFViewerMainWindow::onActionTriggered);
ui->actionRenderOptionAntialiasing->setData(pdf::PDFRenderer::Antialiasing);
ui->actionRenderOptionTextAntialiasing->setData(pdf::PDFRenderer::TextAntialiasing);
ui->actionRenderOptionSmoothPictures->setData(pdf::PDFRenderer::SmoothImages);
ui->actionRenderOptionIgnoreOptionalContentSettings->setData(pdf::PDFRenderer::IgnoreOptionalContent);
for (QAction* action : getRenderingOptionActions())
{
connect(action, &QAction::triggered, this, &PDFViewerMainWindow::onRenderingOptionTriggered);
}
ui->menuView->addSeparator();
ui->menuView->addAction(m_sidebarDockWidget->toggleViewAction());
connect(m_pdfWidget->getDrawWidgetProxy(), &pdf::PDFDrawWidgetProxy::drawSpaceChanged, this, &PDFViewerMainWindow::onDrawSpaceChanged);
connect(m_pdfWidget->getDrawWidgetProxy(), &pdf::PDFDrawWidgetProxy::pageLayoutChanged, this, &PDFViewerMainWindow::onPageLayoutChanged);
connect(m_pdfWidget, &pdf::PDFWidget::pageRenderingErrorsChanged, this, &PDFViewerMainWindow::onPageRenderingErrorsChanged, Qt::QueuedConnection);
connect(m_settings, &PDFViewerSettings::settingsChanged, this, &PDFViewerMainWindow::onViewerSettingsChanged);
connect(m_progress, &pdf::PDFProgress::progressStarted, this, &PDFViewerMainWindow::onProgressStarted);
connect(m_progress, &pdf::PDFProgress::progressStep, this, &PDFViewerMainWindow::onProgressStep);
connect(m_progress, &pdf::PDFProgress::progressFinished, this, &PDFViewerMainWindow::onProgressFinished);
updatePageLayoutActions();
updateUI(true);
onViewerSettingsChanged();
}
PDFViewerMainWindow::~PDFViewerMainWindow()
{
delete ui;
}
void PDFViewerMainWindow::onActionOpenTriggered()
{
QString fileName = QFileDialog::getOpenFileName(this, tr("Select PDF document"), m_settings->getDirectory(), tr("PDF document (*.pdf)"));
if (!fileName.isEmpty())
{
openDocument(fileName);
}
}
void PDFViewerMainWindow::onActionCloseTriggered()
{
closeDocument();
}
void PDFViewerMainWindow::onActionQuitTriggered()
{
close();
}
void PDFViewerMainWindow::onPageRenderingErrorsChanged(pdf::PDFInteger pageIndex, int errorsCount)
{
if (errorsCount > 0)
{
statusBar()->showMessage(tr("Rendering of page %1: %2 errors occured.").arg(pageIndex + 1).arg(errorsCount), 4000);
}
}
void PDFViewerMainWindow::onDrawSpaceChanged()
{
updateUI(false);
}
void PDFViewerMainWindow::onPageLayoutChanged()
{
updateUI(false);
updatePageLayoutActions();
}
void PDFViewerMainWindow::onPageNumberSpinboxEditingFinished()
{
if (m_isLoadingUI)
{
return;
}
if (m_pageNumberSpinBox->hasFocus())
{
m_pdfWidget->setFocus();
}
m_pdfWidget->getDrawWidgetProxy()->goToPage(m_pageNumberSpinBox->value() - 1);
}
void PDFViewerMainWindow::onPageZoomSpinboxEditingFinished()
{
if (m_isLoadingUI)
{
return;
}
if (m_pageZoomSpinBox->hasFocus())
{
m_pdfWidget->setFocus();
}
m_pdfWidget->getDrawWidgetProxy()->zoom(m_pageZoomSpinBox->value() / 100.0);
}
void PDFViewerMainWindow::onActionTriggered(const pdf::PDFAction* action)
{
Q_ASSERT(action);
for (const pdf::PDFAction* currentAction : action->getActionList())
{
switch (action->getType())
{
case pdf::ActionType::GoTo:
{
const pdf::PDFActionGoTo* typedAction = dynamic_cast<const pdf::PDFActionGoTo*>(currentAction);
pdf::PDFDestination destination = typedAction->getDestination();
if (destination.getDestinationType() == pdf::DestinationType::Named)
{
if (const pdf::PDFDestination* targetDestination = m_pdfDocument->getCatalog()->getDestination(destination.getName()))
{
destination = *targetDestination;
}
else
{
destination = pdf::PDFDestination();
QMessageBox::critical(this, tr("Go to action"), tr("Failed to go to destination '%1'. Destination wasn't found.").arg(pdf::PDFEncoding::convertTextString(destination.getName())));
}
}
if (destination.getDestinationType() != pdf::DestinationType::Invalid &&
destination.getPageReference() != pdf::PDFObjectReference())
{
const size_t pageIndex = m_pdfDocument->getCatalog()->getPageIndexFromPageReference(destination.getPageReference());
if (pageIndex != pdf::PDFCatalog::INVALID_PAGE_INDEX)
{
m_pdfWidget->getDrawWidgetProxy()->goToPage(pageIndex);
switch (destination.getDestinationType())
{
case pdf::DestinationType::Fit:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFit);
break;
case pdf::DestinationType::FitH:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitWidth);
break;
case pdf::DestinationType::FitV:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitHeight);
break;
default:
break;
}
}
}
break;
}
case pdf::ActionType::Launch:
{
if (!m_settings->getSettings().m_allowLaunchApplications)
{
// Launching of applications is disabled -> continue to next action
continue;
}
const pdf::PDFActionLaunch* typedAction = dynamic_cast<const pdf::PDFActionLaunch*>(currentAction);
#ifdef Q_OS_WIN
const pdf::PDFActionLaunch::Win& winSpecification = typedAction->getWinSpecification();
if (!winSpecification.file.isEmpty())
{
QString message = tr("Would you like to launch application '%1' in working directory '%2' with parameters '%3'?").arg(QString::fromLatin1(winSpecification.file), QString::fromLatin1(winSpecification.directory), QString::fromLatin1(winSpecification.parameters));
if (QMessageBox::question(this, tr("Launch application"), message) == QMessageBox::Yes)
{
auto getStringOrNULL = [](const QByteArray& array) -> LPCSTR
{
if (!array.isEmpty())
{
return array.data();
}
return NULL;
};
const HINSTANCE result = ::ShellExecuteA(NULL, getStringOrNULL(winSpecification.operation), getStringOrNULL(winSpecification.file), getStringOrNULL(winSpecification.parameters), getStringOrNULL(winSpecification.directory), SW_SHOWNORMAL);
if (result <= HINSTANCE(32))
{
// Error occured
QMessageBox::warning(this, tr("Launch application"), tr("Executing application failed. Error code is %1.").arg(reinterpret_cast<intptr_t>(result)));
}
}
// Continue next action
continue;
}
const pdf::PDFFileSpecification& fileSpecification = typedAction->getFileSpecification();
QString plaftormFileName = fileSpecification.getPlatformFileName();
if (!plaftormFileName.isEmpty())
{
QString message = tr("Would you like to launch application '%1'?").arg(plaftormFileName);
if (QMessageBox::question(this, tr("Launch application"), message) == QMessageBox::Yes)
{
const HINSTANCE result = ::ShellExecuteW(NULL, NULL, plaftormFileName.toStdWString().c_str(), NULL, NULL, SW_SHOWNORMAL);
if (result <= HINSTANCE(32))
{
// Error occured
QMessageBox::warning(this, tr("Launch application"), tr("Executing application failed. Error code is %1.").arg(reinterpret_cast<intptr_t>(result)));
}
}
// Continue next action
continue;
}
#endif
break;
}
case pdf::ActionType::URI:
{
if (!m_settings->getSettings().m_allowLaunchURI)
{
// Launching of URI is disabled -> continue to next action
continue;
}
const pdf::PDFActionURI* typedAction = dynamic_cast<const pdf::PDFActionURI*>(currentAction);
QByteArray URI = m_pdfDocument->getCatalog()->getBaseURI() + typedAction->getURI();
QString urlString = QString::fromLatin1(URI);
QString message = tr("Would you like to open URL '%1'?").arg(urlString);
if (QMessageBox::question(this, tr("Open URL"), message) == QMessageBox::Yes)
{
if (!QDesktopServices::openUrl(QUrl(urlString)))
{
// Error occured
QMessageBox::warning(this, tr("Open URL"), tr("Opening url '%1' failed.").arg(urlString));
}
}
break;
}
case pdf::ActionType::Named:
{
const pdf::PDFActionNamed* typedAction = dynamic_cast<const pdf::PDFActionNamed*>(currentAction);
switch (typedAction->getNamedActionType())
{
case pdf::PDFActionNamed::NamedActionType::NextPage:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::NavigateNextPage);
break;
case pdf::PDFActionNamed::NamedActionType::PrevPage:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::NavigatePreviousPage);
break;
case pdf::PDFActionNamed::NamedActionType::FirstPage:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::NavigateDocumentStart);
break;
case pdf::PDFActionNamed::NamedActionType::LastPage:
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::NavigateDocumentEnd);
break;
default:
break;
}
break;
}
case pdf::ActionType::SetOCGState:
{
const pdf::PDFActionSetOCGState* typedAction = dynamic_cast<const pdf::PDFActionSetOCGState*>(currentAction);
const pdf::PDFActionSetOCGState::StateChangeItems& stateChanges = typedAction->getStateChangeItems();
const bool isRadioButtonsPreserved = typedAction->isRadioButtonsPreserved();
if (m_optionalContentActivity)
{
for (const pdf::PDFActionSetOCGState::StateChangeItem& stateChange : stateChanges)
{
pdf::OCState newState = pdf::OCState::Unknown;
switch (stateChange.first)
{
case pdf::PDFActionSetOCGState::SwitchType::ON:
newState = pdf::OCState::ON;
break;
case pdf::PDFActionSetOCGState::SwitchType::OFF:
newState = pdf::OCState::OFF;
break;
case pdf::PDFActionSetOCGState::SwitchType::Toggle:
{
pdf::OCState oldState = m_optionalContentActivity->getState(stateChange.second);
switch (oldState)
{
case pdf::OCState::ON:
newState = pdf::OCState::OFF;
break;
case pdf::OCState::OFF:
newState = pdf::OCState::ON;
break;
case pdf::OCState::Unknown:
break;
default:
Q_ASSERT(false);
break;
}
break;
}
default:
Q_ASSERT(false);
}
if (newState != pdf::OCState::Unknown)
{
m_optionalContentActivity->setState(stateChange.second, newState, isRadioButtonsPreserved);
}
}
}
break;
}
default:
break;
}
}
}
void PDFViewerMainWindow::onProgressStarted()
{
m_progressTaskbarIndicator->setRange(0, 100);
m_progressTaskbarIndicator->reset();
m_progressTaskbarIndicator->show();
}
void PDFViewerMainWindow::onProgressStep(int percentage)
{
m_progressTaskbarIndicator->setValue(percentage);
}
void PDFViewerMainWindow::onProgressFinished()
{
m_progressTaskbarIndicator->hide();
}
void PDFViewerMainWindow::readSettings()
{
QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
if (geometry.isEmpty())
{
QRect availableGeometry = QApplication::desktop()->availableGeometry(this);
QRect windowRect(0, 0, availableGeometry.width() / 2, availableGeometry.height() / 2);
windowRect = windowRect.translated(availableGeometry.center() - windowRect.center());
setGeometry(windowRect);
}
else
{
restoreGeometry(geometry);
}
QByteArray state = settings.value("windowState", QByteArray()).toByteArray();
if (!state.isEmpty())
{
restoreState(state);
}
m_settings->readSettings(settings);
}
void PDFViewerMainWindow::writeSettings()
{
QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
settings.setValue("geometry", saveGeometry());
settings.setValue("windowState", saveState());
m_settings->writeSettings(settings);
}
void PDFViewerMainWindow::updateTitle()
{
if (m_pdfDocument)
{
QString title = m_pdfDocument->getInfo()->title;
if (title.isEmpty())
{
title = m_currentFile;
}
setWindowTitle(tr("%1 - PDF Viewer").arg(m_currentFile));
}
else
{
setWindowTitle(tr("PDF Viewer"));
}
}
void PDFViewerMainWindow::updatePageLayoutActions()
{
for (QAction* action : { ui->actionPageLayoutContinuous, ui->actionPageLayoutSinglePage, ui->actionPageLayoutTwoColumns, ui->actionPageLayoutTwoPages })
{
action->setChecked(false);
}
const pdf::PageLayout pageLayout = m_pdfWidget->getDrawWidgetProxy()->getPageLayout();
switch (pageLayout)
{
case pdf::PageLayout::SinglePage:
ui->actionPageLayoutSinglePage->setChecked(true);
break;
case pdf::PageLayout::OneColumn:
ui->actionPageLayoutContinuous->setChecked(true);
break;
case pdf::PageLayout::TwoColumnLeft:
case pdf::PageLayout::TwoColumnRight:
ui->actionPageLayoutTwoColumns->setChecked(true);
ui->actionFirstPageOnRightSide->setChecked(pageLayout == pdf::PageLayout::TwoColumnRight);
break;
case pdf::PageLayout::TwoPagesLeft:
case pdf::PageLayout::TwoPagesRight:
ui->actionPageLayoutTwoPages->setChecked(true);
ui->actionFirstPageOnRightSide->setChecked(pageLayout == pdf::PageLayout::TwoPagesRight);
break;
default:
Q_ASSERT(false);
}
}
void PDFViewerMainWindow::updateRenderingOptionActions()
{
const pdf::PDFRenderer::Features features = m_settings->getFeatures();
for (QAction* action : getRenderingOptionActions())
{
action->setChecked(features.testFlag(static_cast<pdf::PDFRenderer::Feature>(action->data().toInt())));
}
}
void PDFViewerMainWindow::updateUI(bool fullUpdate)
{
pdf::PDFTemporaryValueChange guard(&m_isLoadingUI, true);
if (fullUpdate)
{
if (m_pdfDocument)
{
size_t pageCount = m_pdfDocument->getCatalog()->getPageCount();
m_pageNumberSpinBox->setMinimum(1);
m_pageNumberSpinBox->setMaximum(static_cast<int>(pageCount));
m_pageNumberSpinBox->setEnabled(true);
m_pageNumberLabel->setText(tr(" / %1").arg(pageCount));
}
else
{
m_pageNumberSpinBox->setEnabled(false);
m_pageNumberLabel->setText(QString());
}
}
else
{
std::vector<pdf::PDFInteger> currentPages = m_pdfWidget->getDrawWidget()->getCurrentPages();
if (!currentPages.empty())
{
m_pageNumberSpinBox->setValue(currentPages.front() + 1);
// Prefetch pages, if it is enabled
if (m_settings->isPagePrefetchingEnabled())
{
m_pdfWidget->getDrawWidgetProxy()->prefetchPages(currentPages.back());
}
}
m_sidebarWidget->setCurrentPages(currentPages);
}
m_pageZoomSpinBox->setValue(m_pdfWidget->getDrawWidgetProxy()->getZoom() * 100);
}
void PDFViewerMainWindow::onViewerSettingsChanged()
{
m_pdfWidget->updateRenderer(m_settings->getRendererEngine(), m_settings->isMultisampleAntialiasingEnabled() ? m_settings->getRendererSamples() : -1);
m_pdfWidget->updateCacheLimits(m_settings->getCompiledPageCacheLimit() * 1024, m_settings->getThumbnailsCacheLimit(), m_settings->getFontCacheLimit(), m_settings->getInstancedFontCacheLimit());
m_pdfWidget->getDrawWidgetProxy()->setFeatures(m_settings->getFeatures());
m_pdfWidget->getDrawWidgetProxy()->setPreferredMeshResolutionRatio(m_settings->getPreferredMeshResolutionRatio());
m_pdfWidget->getDrawWidgetProxy()->setMinimalMeshResolutionRatio(m_settings->getMinimalMeshResolutionRatio());
m_pdfWidget->getDrawWidgetProxy()->setColorTolerance(m_settings->getColorTolerance());
updateRenderingOptionActions();
}
void PDFViewerMainWindow::onRenderingOptionTriggered(bool checked)
{
QAction* action = qobject_cast<QAction*>(sender());
Q_ASSERT(action);
pdf::PDFRenderer::Features features = m_settings->getFeatures();
features.setFlag(static_cast<pdf::PDFRenderer::Feature>(action->data().toInt()), checked);
m_settings->setFeatures(features);
}
void PDFViewerMainWindow::openDocument(const QString& fileName)
{
// First close old document
closeDocument();
// Password callback
auto getPasswordCallback = [this](bool* ok) -> QString
{
return QInputDialog::getText(this, tr("Encrypted document"), tr("Enter password to acces document content"), QLineEdit::Password, QString(), ok);
};
// Try to open a new document
QApplication::setOverrideCursor(Qt::WaitCursor);
pdf::PDFDocumentReader reader(m_progress, qMove(getPasswordCallback));
pdf::PDFDocument document = reader.readFromFile(fileName);
QApplication::restoreOverrideCursor();
switch (reader.getReadingResult())
{
case pdf::PDFDocumentReader::Result::OK:
{
// Mark current directory as this
QFileInfo fileInfo(fileName);
m_settings->setDirectory(fileInfo.dir().absolutePath());
m_currentFile = fileInfo.fileName();
m_pdfDocument.reset(new pdf::PDFDocument(std::move(document)));
setDocument(m_pdfDocument.data());
statusBar()->showMessage(tr("Document '%1' was successfully loaded!").arg(fileName), 4000);
break;
}
case pdf::PDFDocumentReader::Result::Failed:
{
QMessageBox::critical(this, tr("PDF Viewer"), tr("Document read error: %1").arg(reader.getErrorMessage()));
break;
}
case pdf::PDFDocumentReader::Result::Cancelled:
break; // Do nothing, user cancelled the document reading
}
}
void PDFViewerMainWindow::setDocument(const pdf::PDFDocument* document)
{
if (m_optionalContentActivity)
{
// We use deleteLater, because we want to avoid consistency problem with model
// (we set document to the model before activity).
m_optionalContentActivity->deleteLater();
m_optionalContentActivity = nullptr;
}
if (document)
{
m_optionalContentActivity = new pdf::PDFOptionalContentActivity(document, pdf::OCUsage::View, this);
}
m_pdfWidget->setDocument(document, m_optionalContentActivity);
m_sidebarWidget->setDocument(document, m_optionalContentActivity);
if (m_sidebarWidget->isEmpty())
{
m_sidebarDockWidget->hide();
}
else
{
m_sidebarDockWidget->show();
}
updateTitle();
updateUI(true);
if (m_pdfDocument)
{
const pdf::PDFCatalog* catalog = m_pdfDocument->getCatalog();
setPageLayout(catalog->getPageLayout());
updatePageLayoutActions();
if (const pdf::PDFAction* action = catalog->getOpenAction())
{
onActionTriggered(action);
}
}
}
void PDFViewerMainWindow::closeDocument()
{
setDocument(nullptr);
m_pdfDocument.reset();
}
void PDFViewerMainWindow::setPageLayout(pdf::PageLayout pageLayout)
{
m_pdfWidget->getDrawWidgetProxy()->setPageLayout(pageLayout);
}
std::vector<QAction*> PDFViewerMainWindow::getRenderingOptionActions() const
{
return { ui->actionRenderOptionAntialiasing, ui->actionRenderOptionTextAntialiasing, ui->actionRenderOptionSmoothPictures, ui->actionRenderOptionIgnoreOptionalContentSettings };
}
int PDFViewerMainWindow::adjustDpiX(int value)
{
const int physicalDpiX = this->physicalDpiX();
const int adjustedValue = (value * physicalDpiX) / 96;
return adjustedValue;
}
void PDFViewerMainWindow::closeEvent(QCloseEvent* event)
{
writeSettings();
closeDocument();
event->accept();
}
void PDFViewerMainWindow::showEvent(QShowEvent* event)
{
Q_UNUSED(event);
m_taskbarButton->setWindow(windowHandle());
}
void PDFViewerMainWindow::on_actionPageLayoutSinglePage_triggered()
{
setPageLayout(pdf::PageLayout::SinglePage);
}
void PDFViewerMainWindow::on_actionPageLayoutContinuous_triggered()
{
setPageLayout(pdf::PageLayout::OneColumn);
}
void PDFViewerMainWindow::on_actionPageLayoutTwoPages_triggered()
{
setPageLayout(ui->actionFirstPageOnRightSide->isChecked() ? pdf::PageLayout::TwoPagesRight : pdf::PageLayout::TwoPagesLeft);
}
void PDFViewerMainWindow::on_actionPageLayoutTwoColumns_triggered()
{
setPageLayout(ui->actionFirstPageOnRightSide->isChecked() ? pdf::PageLayout::TwoColumnRight : pdf::PageLayout::TwoColumnLeft);
}
void PDFViewerMainWindow::on_actionFirstPageOnRightSide_triggered()
{
switch (m_pdfWidget->getDrawWidgetProxy()->getPageLayout())
{
case pdf::PageLayout::SinglePage:
case pdf::PageLayout::OneColumn:
break;
case pdf::PageLayout::TwoColumnLeft:
case pdf::PageLayout::TwoColumnRight:
on_actionPageLayoutTwoColumns_triggered();
break;
case pdf::PageLayout::TwoPagesLeft:
case pdf::PageLayout::TwoPagesRight:
on_actionPageLayoutTwoPages_triggered();
break;
default:
Q_ASSERT(false);
}
}
void PDFViewerMainWindow::on_actionFitPage_triggered()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFit);
}
void PDFViewerMainWindow::on_actionFitWidth_triggered()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitWidth);
}
void PDFViewerMainWindow::on_actionFitHeight_triggered()
{
m_pdfWidget->getDrawWidgetProxy()->performOperation(pdf::PDFDrawWidgetProxy::ZoomFitHeight);
}
void PDFViewerMainWindow::on_actionRendering_Errors_triggered()
{
pdf::PDFRenderingErrorsWidget renderingErrorsDialog(this, m_pdfWidget);
renderingErrorsDialog.exec();
}
void PDFViewerMainWindow::on_actionOptions_triggered()
{
PDFViewerSettingsDialog dialog(m_settings->getSettings(), this);
if (dialog.exec() == QDialog::Accepted)
{
m_settings->setSettings(dialog.getSettings());
}
}
void PDFViewerMainWindow::on_actionAbout_triggered()
{
PDFAboutDialog dialog(this);
dialog.exec();
}
} // namespace pdfviewer
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