Qt: Redo sensor binding to be less fragile

CHANGES

@@ -34,6 +34,7 @@ Other fixes:
  - Qt: Fix applying savetype-only overrides
  - Qt: Fix crash in sprite view for partially out-of-bounds sprites (fixes mgba.io/i/2165)
  - Qt: Fix having to press controller buttons twice for menu items (fixes mgba.io/i/2143)
+ - Qt: Redo sensor binding to be less fragile
  - Util: Fix loading UPS patches that affect the last byte of the file
 Misc:
  - Core: Suspend runloop when a core crashes

src/platform/qt/SensorView.cpp

@@ -79,14 +79,11 @@ void SensorView::setController(std::shared_ptr<CoreController> controller) {
 void SensorView::jiggerer(QAbstractButton* button, void (InputController::*setter)(int)) {
 	connect(button, &QAbstractButton::toggled, [this, button, setter](bool checked) {
 		if (!checked) {
-			m_jiggered = nullptr;
+			m_button = nullptr;
 		} else {
 			button->setFocus();
-			m_jiggered = [this, button, setter](int axis) {
-				(m_input->*setter)(axis);
-				button->setChecked(false);
-				button->clearFocus();
-			};
+			m_button = button;
+			m_setter = setter;
 		}
 	});
 	button->installEventFilter(this);
@@ -106,8 +103,12 @@ bool SensorView::eventFilter(QObject*, QEvent* event) {
 	if (event->type() == GamepadAxisEvent::Type()) {
 		GamepadAxisEvent* gae = static_cast<GamepadAxisEvent*>(event);
 		gae->accept();
-		if (m_jiggered && gae->direction() != GamepadAxisEvent::NEUTRAL && gae->isNew()) {
-			m_jiggered(gae->axis());
+		if (m_button && gae->direction() != GamepadAxisEvent::NEUTRAL && gae->isNew()) {
+			m_button->removeEventFilter(this);
+			m_button->clearFocus();
+			m_button->setChecked(false);
+			(m_input->*m_setter)(gae->axis());
+			m_button = nullptr;
 		}
 		return true;
 	}

src/platform/qt/SensorView.h

@@ -42,7 +42,9 @@ private slots:
 private:
 	Ui::SensorView m_ui;
 
-	std::function<void(int)> m_jiggered;
+	QAbstractButton* m_button = nullptr;
+	void (InputController::*m_setter)(int);
+
 	std::shared_ptr<CoreController> m_controller;
 	InputController* m_input;
 	mRotationSource* m_rotation;