FIX(a11y): Make plugin config accessible

src/mumble/CMakeLists.txt

@@ -301,6 +301,8 @@ set(MUMBLE_SOURCES
 	"widgets/MUComboBox.h"
 	"widgets/MultiStyleWidgetWrapper.cpp"
 	"widgets/MultiStyleWidgetWrapper.h"
+	"widgets/MultiColumnTreeWidget.cpp"
+	"widgets/MultiColumnTreeWidget.h"
 	"widgets/RichTextItemDelegate.cpp"
 	"widgets/RichTextItemDelegate.h"
 	"widgets/SearchDialogItemDelegate.cpp"

src/mumble/PluginConfig.ui

@@ -43,10 +43,13 @@
      </property>
      <layout class="QVBoxLayout">
       <item>
-       <widget class="QTreeWidget" name="qtwPlugins">
+       <widget class="MultiColumnTreeWidget" name="qtwPlugins">
         <property name="accessibleName">
          <string>List of plugins</string>
         </property>
+        <property name="tabKeyNavigation">
+         <bool>false</bool>
+        </property>
         <property name="rootIsDecorated">
          <bool>false</bool>
         </property>
@@ -159,6 +162,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>MultiColumnTreeWidget</class>
+   <extends>QTreeWidget</extends>
+   <header>widgets/MultiColumnTreeWidget.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

src/mumble/widgets/MultiColumnTreeWidget.cpp

@@ -0,0 +1,29 @@
+// Copyright 2024 The Mumble Developers. All rights reserved.
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file at the root of the
+// Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+#include "MultiColumnTreeWidget.h"
+
+#include <algorithm>
+
+#include <QDebug>
+
+MultiColumnTreeWidget::MultiColumnTreeWidget(QWidget *parent) : QTreeWidget(parent) {
+}
+
+QModelIndex MultiColumnTreeWidget::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers) {
+	QModelIndex mi = QTreeWidget::moveCursor(cursorAction, modifiers);
+
+	if (cursorAction == QAbstractItemView::MoveLeft) {
+		mi = model()->index(mi.row(), std::max(0, mi.column() - 1));
+	}
+
+	if (cursorAction == QAbstractItemView::MoveRight) {
+		mi = model()->index(mi.row(), std::min(model()->columnCount() - 1, mi.column() + 1));
+	}
+
+	qDebug() << cursorAction << " - " << modifiers << " = " << mi;
+
+	return mi;
+}

src/mumble/widgets/MultiColumnTreeWidget.h

@@ -0,0 +1,22 @@
+// Copyright 2024  The Mumble Developers. All rights reserved.
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file at the root of the
+// Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+#ifndef MUMBLE_MUMBLE_WIDGETS_MULTICOLUMNTREEWIDGET_H_
+#define MUMBLE_MUMBLE_WIDGETS_MULTICOLUMNTREEWIDGET_H_
+
+#include <QTreeWidget>
+#include <QModelIndex>
+#include <QAbstractItemView>
+
+class MultiColumnTreeWidget : public QTreeWidget {
+	Q_OBJECT;
+
+public:
+	MultiColumnTreeWidget(QWidget *parent = nullptr);
+
+	QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers) override;
+};
+
+#endif