Issue #118: First part of splitting

Pdf4QtLibWidgets/sources/pdfselectpagesdialog.cpp

@@ -0,0 +1,137 @@
+//    Copyright (C) 2020-2022 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/>.
+
+#include "pdfselectpagesdialog.h"
+#include "pdfdbgheap.h"
+#include "ui_pdfselectpagesdialog.h"
+
+#include "pdfwidgetutils.h"
+
+#include <QMessageBox>
+
+namespace pdf
+{
+
+PDFSelectPagesDialog::PDFSelectPagesDialog(QString windowTitle,
+                                           QString groupBoxTitle,
+                                           pdf::PDFInteger pageCount,
+                                           const std::vector<pdf::PDFInteger>& visiblePages,
+                                           QWidget* parent) :
+    QDialog(parent),
+    ui(new Ui::PDFSelectPagesDialog),
+    m_pageCount(pageCount),
+    m_visiblePages(visiblePages)
+{
+    ui->setupUi(this);
+
+    setWindowTitle(windowTitle);
+    ui->selectPagesGroupBox->setTitle(groupBoxTitle);
+
+    for (pdf::PDFInteger& pageIndex : m_visiblePages)
+    {
+        ++pageIndex;
+    }
+
+    m_evenPages.reserve(pageCount / 2);
+    m_oddPages.reserve(pageCount / 2 + 1);
+
+    for (pdf::PDFInteger i = 1; i <= pageCount; ++i)
+    {
+        if (i % 2 == 1)
+        {
+            m_oddPages.push_back(i);
+        }
+        else
+        {
+            m_evenPages.push_back(i);
+        }
+    }
+
+    connect(ui->customPageRangeRadioButton, &QRadioButton::toggled, this, &PDFSelectPagesDialog::updateUi);
+
+    setMinimumWidth(pdf::PDFWidgetUtils::scaleDPI_x(this, 400));
+    updateUi();
+    pdf::PDFWidgetUtils::style(this);
+}
+
+PDFSelectPagesDialog::~PDFSelectPagesDialog()
+{
+    delete ui;
+}
+
+std::vector<pdf::PDFInteger> PDFSelectPagesDialog::getSelectedPages() const
+{
+    std::vector<pdf::PDFInteger> result;
+
+    if (ui->visiblePagesRadioButton->isChecked())
+    {
+        result = m_visiblePages;
+    }
+    else if (ui->allPagesRadioButton->isChecked())
+    {
+        result.resize(m_pageCount, 0);
+        std::iota(result.begin(), result.end(), 1);
+    }
+    else if (ui->evenPagesRadioButton->isChecked())
+    {
+        result = m_evenPages;
+    }
+    else if (ui->oddPagesRadioButton->isChecked())
+    {
+        result = m_oddPages;
+    }
+    else if (ui->customPageRangeRadioButton->isChecked())
+    {
+        QString errorMessage;
+        result = pdf::PDFClosedIntervalSet::parse(1, m_pageCount, ui->customPageRangeEdit->text(), &errorMessage).unfold();
+    }
+    else
+    {
+        Q_ASSERT(false);
+    }
+
+    return result;
+}
+
+void PDFSelectPagesDialog::updateUi()
+{
+    ui->customPageRangeEdit->setEnabled(ui->customPageRangeRadioButton->isChecked());
+}
+
+void PDFSelectPagesDialog::accept()
+{
+    if (ui->customPageRangeRadioButton->isChecked())
+    {
+        QString errorMessage;
+        pdf::PDFClosedIntervalSet::parse(1, m_pageCount, ui->customPageRangeEdit->text(), &errorMessage);
+        if (!errorMessage.isEmpty())
+        {
+            QMessageBox::critical(this, tr("Error"), errorMessage);
+            return;
+        }
+    }
+
+    if (getSelectedPages().empty())
+    {
+        QMessageBox::critical(this, tr("Error"), tr("Selected page range is empty."));
+        return;
+    }
+
+    QDialog::accept();
+}
+
+} // namespace pdf