Qt: Fix toggle button not updating

src/duckstation-qt/togglebutton.cpp

@@ -22,6 +22,11 @@ ToggleButton::ToggleButton(QWidget* parent) : QAbstractButton(parent), m_offset_
 
 ToggleButton::~ToggleButton() = default;
 
+Qt::CheckState ToggleButton::checkState() const
+{
+  return isChecked() ? Qt::Checked : Qt::Unchecked;
+}
+
 QSize ToggleButton::sizeHint() const
 {
   return QSize(50, 25);
@@ -117,6 +122,7 @@ void ToggleButton::leaveEvent(QEvent* event)
 void ToggleButton::checkStateSet()
 {
   QAbstractButton::checkStateSet();
+  emit checkStateChanged(checkState());
   animateToggle(isChecked());
 }
 
@@ -131,6 +137,7 @@ void ToggleButton::animateToggle(bool checked)
 void ToggleButton::nextCheckState()
 {
   QAbstractButton::nextCheckState();
+  emit checkStateChanged(checkState());
   animateToggle(isChecked());
   update();
 }

src/duckstation-qt/togglebutton.h

@@ -15,6 +15,8 @@ public:
   explicit ToggleButton(QWidget* parent = nullptr);
   ~ToggleButton() override;
 
+  Qt::CheckState checkState() const;
+
   QSize sizeHint() const override;
 
 Q_SIGNALS: