NOISSUE split out language selection widget, use it in settings

application/widgets/LanguageSelectionWidget.cpp

@@ -0,0 +1,67 @@
+#include "LanguageSelectionWidget.h"
+
+#include <QVBoxLayout>
+#include <QTreeView>
+#include <QHeaderView>
+#include <QLabel>
+#include "MultiMC.h"
+#include "translations/TranslationsModel.h"
+
+LanguageSelectionWidget::LanguageSelectionWidget(QWidget *parent) :
+    QWidget(parent)
+{
+    verticalLayout = new QVBoxLayout(this);
+    verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
+    languageView = new QTreeView(this);
+    languageView->setObjectName(QStringLiteral("languageView"));
+    languageView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    languageView->setAlternatingRowColors(true);
+    languageView->setRootIsDecorated(false);
+    languageView->setItemsExpandable(false);
+    languageView->setWordWrap(true);
+    languageView->header()->setCascadingSectionResizes(true);
+    languageView->header()->setStretchLastSection(false);
+    verticalLayout->addWidget(languageView);
+    helpUsLabel = new QLabel(this);
+    helpUsLabel->setObjectName(QStringLiteral("helpUsLabel"));
+    helpUsLabel->setTextInteractionFlags(Qt::LinksAccessibleByMouse);
+    helpUsLabel->setOpenExternalLinks(true);
+    helpUsLabel->setWordWrap(true);
+    verticalLayout->addWidget(helpUsLabel);
+
+    auto translations = MMC->translations();
+    auto index = translations->selectedIndex();
+    languageView->setModel(translations.get());
+    languageView->setCurrentIndex(index);
+    languageView->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
+    languageView->header()->setSectionResizeMode(0, QHeaderView::Stretch);
+    connect(languageView->selectionModel(), &QItemSelectionModel::currentRowChanged, this, &LanguageSelectionWidget::languageRowChanged);
+}
+
+QString LanguageSelectionWidget::getSelectedLanguageKey() const
+{
+    auto translations = MMC->translations();
+    return translations->data(languageView->currentIndex(), Qt::UserRole).toString();
+}
+
+void LanguageSelectionWidget::retranslate()
+{
+    QString text =
+        tr("Don't see your language or the quality is poor?") +
+        "<br/>" +
+        QString("<a href=\"https://github.com/MultiMC/MultiMC5/wiki/Translating-MultiMC\">%1</a>").arg("Help us with translations!");
+    helpUsLabel->setText(text);
+
+}
+
+void LanguageSelectionWidget::languageRowChanged(const QModelIndex& current, const QModelIndex& previous)
+{
+    if (current == previous)
+    {
+        return;
+    }
+    auto translations = MMC->translations();
+    QString key = translations->data(current, Qt::UserRole).toString();
+    translations->selectLanguage(key);
+    translations->updateLanguage(key);
+}

application/widgets/LanguageSelectionWidget.h

@@ -0,0 +1,41 @@
+/* Copyright 2013-2019 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QWidget>
+
+class QVBoxLayout;
+class QTreeView;
+class QLabel;
+
+class LanguageSelectionWidget: public QWidget
+{
+    Q_OBJECT
+public:
+    explicit LanguageSelectionWidget(QWidget *parent = 0);
+    virtual ~LanguageSelectionWidget() { };
+
+    QString getSelectedLanguageKey() const;
+    void retranslate();
+
+protected slots:
+    void languageRowChanged(const QModelIndex &current, const QModelIndex &previous);
+
+private:
+    QVBoxLayout *verticalLayout = nullptr;
+    QTreeView *languageView = nullptr;
+    QLabel *helpUsLabel = nullptr;
+};