UI: Add used licences in about window

src/UI/AboutWindow.cc

@@ -9,6 +9,7 @@
 #include <QEvent>
 #include <QMouseEvent>
 #include <QApplication>
+#include <QTextEdit>
 
 using namespace Vivy;
 
@@ -50,6 +51,29 @@ public:
     }
 };
 
+// Simple QLabel for licences
+class LicenceLabel : public QTextEdit {
+public:
+    explicit LicenceLabel(QWidget *parent, const QString &url)
+        : QTextEdit(parent)
+    {
+        QFile content(url);
+        if (!content.open(QIODevice::ReadOnly | QIODevice::Text))
+            throw std::runtime_error("Failed to open file that should be accessible");
+        setText(content.readAll());
+        setTextInteractionFlags(Qt::NoTextInteraction);
+        setAlignment(Qt::AlignJustify | Qt::AlignTop);
+        setAcceptRichText(true);
+        setReadOnly(true);
+        setAutoFormatting(QTextEdit::AutoAll);
+
+        setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+        setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+        setFont(vivyApp->getApplicationFont(VivyApplication::Font::Monospace));
+        setFrameStyle(QFrame::NoFrame);
+    }
+};
+
 // Construct the AboutWindow
 AboutWindow::AboutWindow(QWidget *parent) noexcept
     : Window(QIcon(":icons/vivy.png"), "Vivy - About", parent)
@@ -64,8 +88,18 @@ AboutWindow::AboutWindow(QWidget *parent) noexcept
     panels->addTab(new SimpleLabel(panels, aboutContent), "About");
     panels->addTab(new SimpleLabel(panels, libContent), "Libraries");
 
+    QTabWidget *licences = new QTabWidget(panels);
+    licences->setTabPosition(QTabWidget::TabPosition::West);
+    licences->addTab(new LicenceLabel(licences, ":licence/MIT"), "MIT");
+    licences->addTab(new LicenceLabel(licences, ":licence/LGPL-V2.0"), "LGPL-V2.0");
+    licences->addTab(new LicenceLabel(licences, ":licence/LGPL-V2.1"), "LGPL-V2.1");
+    licences->addTab(new LicenceLabel(licences, ":licence/LGPL-V3"), "LGPL-V3");
+    licences->addTab(new LicenceLabel(licences, ":licence/OFL-1.1"), "OFL-1.1");
+    panels->addTab(licences, "Licences");
+
     setCentralWidget(panels);
-    resize(300, 400);
+    setMinimumWidth(800);
+    setMinimumHeight(600);
 }
 
 void

utils/rsc/licence/OFL-1.1

-Copyright (c) 2014, The Fira Code Project Authors (https://github.com/tonsky/FiraCode)
+Copyright (c) year, authors
 
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
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