Experiemental slider improvement

src/mumble/MainWindow.cpp

@@ -199,6 +199,16 @@ MainWindow::MainWindow(QWidget *p)
 	QObject::connect(this, &MainWindow::serverSynchronized, Global::get().pluginManager,
 					 &PluginManager::on_serverSynchronized);
 
+	// Sadly, QWidgetActions have a poor accessibility as of Qt 5.15.10
+	// The slider value will not be read under any circumstances, so we use the label
+	// above it to communicate that to the user.
+	// This is not pretty, but it seems to be the only option, if we want to keep
+	// the inline slider...
+	m_localVolumeLabel->setAccessibleName(tr("Local Volume Adjustment"));
+	m_localVolumeLabel->setAccessibleDescription(
+		tr("The next element in this menu is a slider to adjust the volume of the selected client. "
+		   "Focus this label to get the updated adjustment value."));
+
 	QAccessible::installFactory(AccessibleSlider::semanticSliderFactory);
 }
 

src/mumble/MenuLabel.cpp

@@ -7,13 +7,35 @@
 
 #include <QLabel>
 
-MenuLabel::MenuLabel(const QString &text, QObject *parent) : QWidgetAction(parent), m_text(text) {
+MenuLabel::MenuLabel(const QString &text, QObject *parent)
+	: QWidgetAction(parent), m_text(text), m_accessibleName(""), m_accessibleDescription("") {
 	setMenuRole(QAction::NoRole);
 }
 
 QWidget *MenuLabel::createWidget(QWidget *parent) {
 	QLabel *label = new QLabel(m_text, parent);
 	label->setFocusPolicy(Qt::TabFocus);
 
+	label->setAccessibleName(m_accessibleName);
+	label->setAccessibleDescription(m_accessibleDescription);
+
 	return label;
 }
+
+void MenuLabel::setAccessibleName(const QString &name) {
+	m_accessibleName = name;
+
+	QLabel *label = qobject_cast< QLabel * >(defaultWidget());
+	if (label) {
+		label->setAccessibleName(m_accessibleName);
+	}
+}
+
+void MenuLabel::setAccessibleDescription(const QString &description) {
+	m_accessibleDescription = description;
+
+	QLabel *label = qobject_cast< QLabel * >(defaultWidget());
+	if (label) {
+		label->setAccessibleDescription(m_accessibleDescription);
+	}
+}

src/mumble/MenuLabel.h

@@ -17,11 +17,16 @@ class MenuLabel : public QWidgetAction {
 public:
 	MenuLabel(const QString &text, QObject *parent = nullptr);
 
+	void setAccessibleName(const QString &name);
+	void setAccessibleDescription(const QString &description);
+
 protected:
 	QWidget *createWidget(QWidget *parent) override;
 
 private:
 	const QString m_text;
+	QString m_accessibleName;
+	QString m_accessibleDescription;
 };
 
 #endif