PDF4QT/Pdf4QtLibGui/pdfcreatebitonaldocumentdia...

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C++

// Copyright (C) 2023 Jakub Melka
//
// This file is part of PDF4QT.
//
// PDF4QT 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
// with the written consent of the copyright owner, any later version.
//
// PDF4QT 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 PDF4QT. If not, see <https://www.gnu.org/licenses/>.
#ifndef PDFCREATEBITONALDOCUMENTDIALOG_H
#define PDFCREATEBITONALDOCUMENTDIALOG_H
#include "pdfcms.h"
#include "pdfdocument.h"
#include "pdfobjectutils.h"
#include "pdfimage.h"
#include "pdfimageconversion.h"
#include "pdfprogress.h"
#include <QDialog>
#include <QFuture>
#include <QFutureWatcher>
namespace Ui
{
class PDFCreateBitonalDocumentDialog;
}
namespace pdfviewer
{
class PDFCreateBitonalDocumentPreviewWidget : public QWidget
{
Q_OBJECT
public:
PDFCreateBitonalDocumentPreviewWidget(QWidget* parent);
virtual ~PDFCreateBitonalDocumentPreviewWidget() override;
virtual void paintEvent(QPaintEvent* event) override;
void setCaption(QString caption);
void setImage(QImage image);
private:
QString m_caption;
QImage m_image;
};
class PDFCreateBitonalDocumentDialog : public QDialog
{
Q_OBJECT
public:
explicit PDFCreateBitonalDocumentDialog(const pdf::PDFDocument* document,
const pdf::PDFCMS* cms,
pdf::PDFProgress* progress,
QWidget* parent);
virtual ~PDFCreateBitonalDocumentDialog() override;
pdf::PDFDocument takeBitonaldDocument() { return qMove(m_bitonalDocument); }
struct ImageConversionInfo
{
pdf::PDFObjectReference imageReference;
bool conversionEnabled = true;
};
private:
void createBitonalDocument();
void onCreateBitonalDocumentButtonClicked();
void onPerformFinished();
void loadImages();
void updateUi();
void updatePreview();
std::optional<pdf::PDFImage> getImageFromReference(pdf::PDFObjectReference reference) const;
Ui::PDFCreateBitonalDocumentDialog* ui;
const pdf::PDFDocument* m_document;
const pdf::PDFCMS* m_cms;
QPushButton* m_createBitonalDocumentButton;
bool m_conversionInProgress;
bool m_processed;
QFuture<void> m_future;
std::optional<QFutureWatcher<void>> m_futureWatcher;
pdf::PDFDocument m_bitonalDocument;
pdf::PDFObjectClassifier m_classifier;
std::vector<pdf::PDFObjectReference> m_imageReferences;
std::vector<ImageConversionInfo> m_imagesToBeConverted;
QImage m_previewImageLeft;
QImage m_previewImageRight;
PDFCreateBitonalDocumentPreviewWidget* m_leftPreviewWidget;
PDFCreateBitonalDocumentPreviewWidget* m_rightPreviewWidget;
pdf::PDFProgress* m_progress;
pdf::PDFImageConversion::ConversionMethod m_conversionMethod = pdf::PDFImageConversion::ConversionMethod::Automatic;
int m_manualThreshold = 128;
};
} // namespace pdfviewer
#endif // PDFCREATEBITONALDOCUMENTDIALOG_H