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PDF draw widget (first part)

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Jakub Melka
2019-01-27 17:55:22 +01:00
parent 7631265ba4
commit d4087eae1a
10 changed files with 896 additions and 49 deletions
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176
PdfForQtViewer/pdfviewermainwindow.cpp
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@ -1,23 +1,60 @@
// 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 "pdfdocumentreader.h"
#include "pdfvisitor.h"
#include "pdfstreamfilters.h"
#include "pdfdrawwidget.h"
#include <QSettings>
#include <QFileDialog>
#include <QMessageBox>
#include <QCloseEvent>
#include <QApplication>
#include <QDesktopWidget>
#include <QStandardPaths>
namespace pdfviewer
{
PDFViewerMainWindow::PDFViewerMainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::PDFViewerMainWindow)
ui(new Ui::PDFViewerMainWindow),
m_pdfWidget(nullptr)
{
ui->setupUi(this);
// Initialize shortcuts
ui->actionOpen->setShortcut(QKeySequence::Open);
ui->actionClose->setShortcut(QKeySequence::Close);
ui->actionQuit->setShortcut(QKeySequence::Quit);
connect(ui->actionOpen, &QAction::triggered, this, &PDFViewerMainWindow::onActionOpenTriggered);
connect(ui->actionClose, &QAction::triggered, this, &PDFViewerMainWindow::onActionCloseTriggered);
connect(ui->actionQuit, &QAction::triggered, this, &PDFViewerMainWindow::onActionQuitTriggered);
m_pdfWidget = new pdf::PDFWidget(this);
setCentralWidget(m_pdfWidget);
setFocusProxy(m_pdfWidget);
readSettings();
}
PDFViewerMainWindow::~PDFViewerMainWindow()
@ -27,35 +64,120 @@ PDFViewerMainWindow::~PDFViewerMainWindow()
void PDFViewerMainWindow::onActionOpenTriggered()
{
QString fileName = QFileDialog::getOpenFileName(this, tr("Select PDF document"), "K:/Programming/PDF/testpdf", tr("PDF document (*.pdf)"));
QString fileName = QFileDialog::getOpenFileName(this, tr("Select PDF document"), m_directory, tr("PDF document (*.pdf)"));
if (!fileName.isEmpty())
{
pdf::PDFDocumentReader reader;
pdf::PDFDocument document = reader.readFromFile(fileName);
pdf::PDFStatisticsCollector collector;
pdf::PDFApplyVisitor(document, &collector);
if (reader.isSuccessfull())
{
QMessageBox::information(this, tr("PDF Reader"), tr("Document '%1' was successfully loaded!").arg(fileName));
}
else
{
QMessageBox::information(this, tr("PDF Reader"), tr("Document read error: %1").arg(reader.getErrorMessage()));
}
const pdf::PDFCatalog* catalog = document.getCatalog();
const pdf::PDFPage* page = catalog->getPage(0);
const pdf::PDFObject& contents = page->getContents();
if (contents.isStream())
{
const pdf::PDFStream* stream = contents.getStream();
const QByteArray* compressed = stream->getContent();
pdf::PDFFlateDecodeFilter fd;
QByteArray uncompressed = fd.apply(*compressed, &document, pdf::PDFObject());
}
openDocument(fileName);
}
}
void PDFViewerMainWindow::onActionCloseTriggered()
{
closeDocument();
}
void PDFViewerMainWindow::onActionQuitTriggered()
{
close();
}
void PDFViewerMainWindow::readSettings()
{
QSettings settings(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_directory = settings.value("defaultDirectory", QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation)).toString();
}
void PDFViewerMainWindow::writeSettings()
{
QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
settings.setValue("geometry", saveGeometry());
settings.setValue("windowState", saveState());
settings.setValue("defaultDirectory", m_directory);
}
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::openDocument(const QString& fileName)
{
// First close old document
closeDocument();
// Try to open a new document
QApplication::setOverrideCursor(Qt::WaitCursor);
pdf::PDFDocumentReader reader;
pdf::PDFDocument document = reader.readFromFile(fileName);
QApplication::restoreOverrideCursor();
if (reader.isSuccessfull())
{
// Mark current directory as this
QFileInfo fileInfo(fileName);
m_directory = 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);
}
else
{
QMessageBox::critical(this, tr("PDF Viewer"), tr("Document read error: %1").arg(reader.getErrorMessage()));
}
}
void PDFViewerMainWindow::setDocument(const pdf::PDFDocument* document)
{
m_pdfWidget->setDocument(document);
updateTitle();
}
void PDFViewerMainWindow::closeDocument()
{
setDocument(nullptr);
m_pdfDocument.reset();
}
void PDFViewerMainWindow::closeEvent(QCloseEvent* event)
{
writeSettings();
closeDocument();
event->accept();
}
} // namespace pdfviewer