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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "zoomselector.h"
#include <QFileDialog>
#include <QMessageBox>
#include <QSpinBox>
#include <QPdfBookmarkModel>
#include <QPdfDocument>
#include <QPdfPageNavigator>
#include <QStandardPaths>
#include <QtMath>
const qreal zoomMultiplier = qSqrt(2.0);
Q_LOGGING_CATEGORY(lcExample, "qt.examples.pdfviewer")
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
, m_zoomSelector(new ZoomSelector(this))
, m_pageSelector(new QSpinBox(this))
, m_document(new QPdfDocument(this))
{
ui->setupUi(this);
m_zoomSelector->setMaximumWidth(150);
ui->mainToolBar->insertWidget(ui->actionZoom_In, m_zoomSelector);
ui->mainToolBar->insertWidget(ui->actionForward, m_pageSelector);
connect(m_pageSelector, &QSpinBox::valueChanged, this, &MainWindow::pageSelected);
auto nav = ui->pdfView->pageNavigator();
connect(nav, &QPdfPageNavigator::currentPageChanged, m_pageSelector, &QSpinBox::setValue);
connect(nav, &QPdfPageNavigator::backAvailableChanged, ui->actionBack, &QAction::setEnabled);
connect(nav, &QPdfPageNavigator::forwardAvailableChanged, ui->actionForward, &QAction::setEnabled);
connect(m_zoomSelector, &ZoomSelector::zoomModeChanged, ui->pdfView, &QPdfView::setZoomMode);
connect(m_zoomSelector, &ZoomSelector::zoomFactorChanged, ui->pdfView, &QPdfView::setZoomFactor);
m_zoomSelector->reset();
QPdfBookmarkModel *bookmarkModel = new QPdfBookmarkModel(this);
bookmarkModel->setDocument(m_document);
ui->bookmarkView->setModel(bookmarkModel);
connect(ui->bookmarkView, &QAbstractItemView::activated, this, &MainWindow::bookmarkSelected);
ui->tabWidget->setTabEnabled(1, false); // disable 'Pages' tab for now
ui->pdfView->setDocument(m_document);
connect(ui->pdfView, &QPdfView::zoomFactorChanged,
m_zoomSelector, &ZoomSelector::setZoomFactor);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::open(const QUrl &docLocation)
{
if (docLocation.isLocalFile()) {
m_document->load(docLocation.toLocalFile());
const auto documentTitle = m_document->metaData(QPdfDocument::MetaDataField::Title).toString();
setWindowTitle(!documentTitle.isEmpty() ? documentTitle : QStringLiteral("PDF Viewer"));
pageSelected(0);
m_pageSelector->setMaximum(m_document->pageCount() - 1);
} else {
const QString message = tr("%1 is not a valid local file").arg(docLocation.toString());
qCDebug(lcExample).noquote() << message;
QMessageBox::critical(this, tr("Failed to open"), message);
}
qCDebug(lcExample) << docLocation;
}
void MainWindow::bookmarkSelected(const QModelIndex &index)
{
if (!index.isValid())
return;
const int page = index.data(int(QPdfBookmarkModel::Role::Page)).toInt();
const qreal zoomLevel = index.data(int(QPdfBookmarkModel::Role::Level)).toReal();
ui->pdfView->pageNavigator()->jump(page, {}, zoomLevel);
}
void MainWindow::pageSelected(int page)
{
auto nav = ui->pdfView->pageNavigator();
nav->jump(page, {}, nav->currentZoom());
}
void MainWindow::on_actionOpen_triggered()
{
if (m_fileDialog == nullptr) {
m_fileDialog = new QFileDialog(this, tr("Choose a PDF"),
QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation));
m_fileDialog->setAcceptMode(QFileDialog::AcceptOpen);
m_fileDialog->setMimeTypeFilters({"application/pdf"});
}
if (m_fileDialog->exec() == QDialog::Accepted) {
const QUrl toOpen = m_fileDialog->selectedUrls().constFirst();
if (toOpen.isValid())
open(toOpen);
}
}
void MainWindow::on_actionQuit_triggered()
{
QApplication::quit();
}
void MainWindow::on_actionAbout_triggered()
{
QMessageBox::about(this, tr("About PdfViewer"),
tr("An example using QPdfDocument"));
}
void MainWindow::on_actionAbout_Qt_triggered()
{
QMessageBox::aboutQt(this);
}
void MainWindow::on_actionZoom_In_triggered()
{
ui->pdfView->setZoomFactor(ui->pdfView->zoomFactor() * zoomMultiplier);
}
void MainWindow::on_actionZoom_Out_triggered()
{
ui->pdfView->setZoomFactor(ui->pdfView->zoomFactor() / zoomMultiplier);
}
void MainWindow::on_actionPrevious_Page_triggered()
{
auto nav = ui->pdfView->pageNavigator();
nav->jump(nav->currentPage() - 1, {}, nav->currentZoom());
}
void MainWindow::on_actionNext_Page_triggered()
{
auto nav = ui->pdfView->pageNavigator();
nav->jump(nav->currentPage() + 1, {}, nav->currentZoom());
}
void MainWindow::on_actionContinuous_triggered()
{
ui->pdfView->setPageMode(ui->actionContinuous->isChecked() ?
QPdfView::PageMode::MultiPage :
QPdfView::PageMode::SinglePage);
}
void MainWindow::on_actionBack_triggered()
{
ui->pdfView->pageNavigator()->back();
}
void MainWindow::on_actionForward_triggered()
{
ui->pdfView->pageNavigator()->forward();
}
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