UI: Now we should use native dialogues with the custom theme + icons (it seems...

UI: Now we should use native dialogues with the custom theme + icons (it seems we can't hinib the qss with QFileDialogs...)

src/UI/MainWindow.cc

@@ -248,12 +248,12 @@ void
 MainWindow::openDocument() noexcept
 {
     const QString separator = QStringLiteral(";;");
-    const QString filename  = QFileDialog::getOpenFileName(
-        this, "Select a document to open", QDir::homePath(),
+    const QString filename  = dialogOpenFileName("Select a document to open", QDir::homePath(),
                                                 QStringLiteral("Vivy documents (*.vivy);;"
                                                                "Vivy scripts (*.lua *.vvs);;") +
-            Utils::getAudioFileSuffixFilter() + separator + Utils::getVideoFileSuffixFilter() +
-            separator + Utils::getAssFileSuffixFilter());
+                                                    Utils::getAudioFileSuffixFilter() + separator +
+                                                    Utils::getVideoFileSuffixFilter() + separator +
+                                                    Utils::getAssFileSuffixFilter());
     if (filename.isEmpty()) {
         qWarning() << "Found an empty filename, don't open a file";
         return;
@@ -393,3 +393,31 @@ MainWindow::documentViewActionsChanged() noexcept
         qInfo() << "No view to display:" << e.what();
     }
 }
+QString
+MainWindow::dialogOpenFileName(const QString &title, const QString &folder,
+                               const QString &filter) noexcept
+{
+    QFileDialog dialog(this, title, folder, filter);
+    bool dialogAccepted = false;
+    std::unique_ptr<VivyFileIconProvider> iconProvider(new VivyFileIconProvider());
+
+    dialog.setOption(QFileDialog::ReadOnly);
+    dialog.setIconProvider(iconProvider.get());
+    dialog.setFileMode(QFileDialog::ExistingFile);
+    connect(&dialog, &QFileDialog::accepted, this,
+            [&dialogAccepted]() noexcept -> void { dialogAccepted = true; });
+
+    dialog.exec();
+
+    if (!dialogAccepted) {
+        return QStringLiteral("");
+    }
+
+    const QStringList resList = dialog.selectedFiles();
+    if (resList.size() != 1) {
+        qCritical() << "You must select only one file";
+        return QStringLiteral("");
+    }
+
+    return resList.at(0);
+}

src/UI/MainWindow.hh

@@ -46,14 +46,15 @@ private:
     AbstractDocumentView *getCurrentDocumentView() const;
 
     int findFirstUntouchedDocument() const noexcept;
+    QString dialogOpenFileName(const QString &title, const QString &folder,
+                               const QString &filter) noexcept;
 
     // Do an action with the selected filename. The 'call' variable must be
     // callable like this: call(DocumentView, Document, QString)
     template <typename DV, typename D>
     void withOpenFileNameDialog(const QString &title, const QString &filter, auto call) noexcept
     {
-        const QString filename =
-            QFileDialog::getOpenFileName(this, title, QDir::homePath(), filter);
+        const QString filename = dialogOpenFileName(title, QDir::homePath(), filter);
 
         if (filename.isEmpty()) {
             qWarning() << "Found an empty filename, don't open a file";