Add minimal version of Qt port

qt/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+project(bibref-qt LANGUAGES CXX)
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Concurrent)
+
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(sword REQUIRED sword)
+
+include_directories(/usr/include/sword)
+
+qt_standard_project_setup()
+
+qt_add_executable(bibref-qt
+    main.cpp
+    mainwindow.cpp mainwindow.h
+    book.cpp book.h
+    books.cpp books.h
+    cli.cpp cli.h
+    fingerprint.cpp fingerprint.h
+    psalmsinfo.cpp psalmsinfo.h
+)
+
+set_target_properties(bibref-qt PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(bibref-qt PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+    Qt6::Concurrent
+    sword readline boost_system boost_filesystem)
+
+install(TARGETS bibref-qt
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

qt/book.cpp

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+../book.cpp

qt/book.h

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+../book.h

qt/books.cpp

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+../books.cpp

qt/books.h

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+../books.h

qt/cli.cpp

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+../cli.cpp

qt/cli.h

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+../cli.h

qt/fingerprint.cpp

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+../fingerprint.cpp

qt/fingerprint.h

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+../fingerprint.h

qt/main.cpp

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+#include <QApplication>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MainWindow window;
+    window.show();
+    return app.exec();
+}

qt/mainwindow.cpp

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+#include <QtWidgets>
+
+#include "mainwindow.h"
+
+#include "books.h"
+#include "cli.h"
+#include "swmgr.h"
+
+#include <QCoreApplication>
+#include <qtconcurrentrun.h>
+#include <QThread>
+#include <QtConcurrent/qtconcurrentmap.h>
+#include <QtCore/qelapsedtimer.h>
+
+using namespace std;
+
+using namespace sword;
+
+// These are defined in cli.cpp. FIXME: Make this common in a better way.
+extern bool booksAdded;
+extern string text[2];
+extern vector<bool> textset;
+
+QString getClipboardInfos() {
+    QString intro = "<b>Contents of the clipboards in a-y notation</b>";
+    for (int i = 0; i < 2; ++i) {
+        intro += "<br>Clipboard " + QString::number(i + 1);
+        if (text[i].empty())
+            intro += " is empty.";
+        else
+            intro += " contains " + text[i] + ".";
+    }
+    return intro;
+}
+
+MainWindow::MainWindow()
+{
+    QWidget *widget = new QWidget;
+    setCentralWidget(widget);
+    QWidget *topFiller = new QWidget;
+    topFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    infoLabel = new QLabel(getClipboardInfos());
+    infoLabel->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+    infoLabel->setAlignment(Qt::AlignCenter);
+
+    QWidget *bottomFiller = new QWidget;
+    bottomFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->setContentsMargins(5, 5, 5, 5);
+    layout->addWidget(topFiller);
+    layout->addWidget(infoLabel);
+    layout->addWidget(bottomFiller);
+    widget->setLayout(layout);
+    createActions();
+    createMenus();
+
+    QString message = tr("Welcome to bibref!");
+    statusBar()->showMessage(message);
+
+    setWindowTitle(tr("bibref"));
+    setMinimumSize(160, 160);
+    resize(480, 320);
+}
+
+void addBiblesThread(QStatusBar* statusBar) {
+    addBibles();
+    QString message = "Bibles are loaded.";
+    statusBar->showMessage(message);
+    booksAdded = true;
+}
+
+void MainWindow::addBibles()
+{
+    QString message = tr("Please wait...");
+    statusBar()->showMessage(message);
+    QFuture<void> future = QtConcurrent::run(addBiblesThread, statusBar());
+}
+
+void MainWindow::greekText(int index)
+{
+    QInputDialog inputDialog(this);
+    inputDialog.setWindowTitle(tr("Define a Greek text and put its Latin transcription in clipboard"));
+    inputDialog.setLabelText(tr("Greek text:"));
+    if (textset[index]) {
+        inputDialog.setTextValue(latinToGreek(text[index]).c_str());
+    }
+    if (inputDialog.exec() != QDialog::Accepted)
+        return;
+    const QString value = inputDialog.textValue().trimmed();
+    if (value.isEmpty())
+        return;
+    string rest = value.toStdString();
+
+    // Taken from cli:
+    SWMgr manager;
+    manager.setGlobalOption("Greek Accents", "Off"); // disable accents
+    SWBuf to_convert = rest.data();
+    manager.filterText("Greek Accents", to_convert);
+    // Convert Greek to Latin:
+    string processed = processVerse(to_convert.c_str());
+    if (processed.length() == 0) {
+        error("Text does not contain Greek letters, ignored.");
+        return; // Success, but nothing happened.
+    }
+    text[index] = processed; // Store result.
+    textset[index] = true; // activate clipboard
+    info("Stored internally as " + processed + "."); // Success!
+
+    infoLabel->setText(getClipboardInfos());
+}
+
+void MainWindow::greekText1()
+{
+    this->greekText(0);
+}
+
+
+void MainWindow::greekText2()
+{
+    this->greekText(1);
+}
+
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Menu"),
+        tr("<i>bibref</i> is a tool that helps discovering internal references in the Bible."
+        "<br>It aims at finding citations of the <a href=\"https://en.wikipedia.org/wiki/Septuagint\">Septuagint</a>"
+        " in the <a href=\"https://en.wikipedia.org/wiki/New_Testament\">Greek New Testament</a>"
+        " in a mechanical way."));
+}
+
+void MainWindow::aboutQt()
+{
+}
+
+void MainWindow::createActions()
+{
+    addBiblesAct = new QAction(tr("&Add books"), this);
+    addBiblesAct->setShortcuts(QKeySequence::New);
+    addBiblesAct->setStatusTip(tr("Load and index the default Bible editions"));
+    connect(addBiblesAct, &QAction::triggered, this, &MainWindow::addBibles);
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcuts(QKeySequence::Quit);
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, &QAction::triggered, this, &QWidget::close);
+
+    greekText1Act = new QAction(tr("&Text 1"), this);
+    greekText1Act->setStatusTip(tr("Define a Greek text and put its Latin transcription in clipboard 1"));
+    connect(greekText1Act, &QAction::triggered, this, &MainWindow::greekText1);
+
+    greekText2Act = new QAction(tr("&Text 2"), this);
+    greekText2Act->setStatusTip(tr("Define a Greek text and put its Latin transcription in clipboard 2"));
+    connect(greekText2Act, &QAction::triggered, this, &MainWindow::greekText2);
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, &QAction::triggered, this, &MainWindow::about);
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, &QAction::triggered, qApp, &QApplication::aboutQt);
+    connect(aboutQtAct, &QAction::triggered, this, &MainWindow::aboutQt);
+}
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(addBiblesAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(greekText1Act);
+    editMenu->addAction(greekText2Act);
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}

qt/mainwindow.h

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+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QActionGroup;
+class QLabel;
+class QMenu;
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+protected:
+
+private slots:
+    void addBibles();
+    void greekText1();
+    void greekText2();
+    void about();
+    void aboutQt();
+
+private:
+    void createActions();
+    void createMenus();
+    void greekText(int n);
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *helpMenu;
+    QAction *addBiblesAct;
+    QAction *exitAct;
+    QAction *greekText1Act;
+    QAction *greekText2Act;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+    QLabel *infoLabel;
+};
+
+#endif

qt/psalmsinfo.cpp

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+../psalmsinfo.cpp

qt/psalmsinfo.h

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+../psalmsinfo.h