Qt: Rudimentary gamepad mapper

src/platform/qt/GBAKeyEditor.cpp

@@ -3,6 +3,7 @@
 #include <QPaintEvent>
 #include <QPainter>
 #include <QPushButton>
+#include <QTimer>
 #include <QVBoxLayout>
 
 #include "InputController.h"
@@ -39,6 +40,22 @@ GBAKeyEditor::GBAKeyEditor(InputController* controller, int type, QWidget* paren
 	m_keyB = new KeyEditor(this);
 	m_keyL = new KeyEditor(this);
 	m_keyR = new KeyEditor(this);
+
+#ifdef BUILD_SDL
+	if (type == SDL_BINDING_BUTTON) {
+		m_keyDU->setNumeric(true);
+		m_keyDD->setNumeric(true);
+		m_keyDL->setNumeric(true);
+		m_keyDR->setNumeric(true);
+		m_keySelect->setNumeric(true);
+		m_keyStart->setNumeric(true);
+		m_keyA->setNumeric(true);
+		m_keyB->setNumeric(true);
+		m_keyL->setNumeric(true);
+		m_keyR->setNumeric(true);
+	}
+#endif
+
 	m_keyDU->setValue(GBAInputQueryBinding(map, type, GBA_KEY_UP));
 	m_keyDD->setValue(GBAInputQueryBinding(map, type, GBA_KEY_DOWN));
 	m_keyDL->setValue(GBAInputQueryBinding(map, type, GBA_KEY_LEFT));
@@ -92,6 +109,15 @@ GBAKeyEditor::GBAKeyEditor(InputController* controller, int type, QWidget* paren
 	m_background.load(":/res/keymap.qpic");
 
 	setAll->setFocus();
+
+#ifdef BUILD_SDL
+	if (type == SDL_BINDING_BUTTON) {
+		m_gamepadTimer = new QTimer(this);
+		connect(m_gamepadTimer, SIGNAL(timeout()), this, SLOT(testGamepad()));
+		m_gamepadTimer->setInterval(100);
+		m_gamepadTimer->start();
+	}
+#endif
 }
 
 void GBAKeyEditor::setAll() {
@@ -150,6 +176,21 @@ void GBAKeyEditor::save() {
 	m_controller->saveConfiguration(m_type);
 }
 
+#ifdef BUILD_SDL
+void GBAKeyEditor::testGamepad() {
+	QSet<int> activeKeys = m_controller->activeGamepadButtons();
+	if (activeKeys.empty()) {
+		return;
+	}
+	for (KeyEditor* key : m_keyOrder) {
+		if (!key->hasFocus()) {
+			continue;
+		}
+		key->setValue(*activeKeys.begin());
+	}
+}
+#endif
+
 void GBAKeyEditor::setLocation(QWidget* widget, qreal x, qreal y) {
 	QSize s = size();
 	QSize hint = widget->sizeHint();

src/platform/qt/GBAKeyEditor.h

@@ -26,6 +26,9 @@ protected:
 private slots:
 	void setNext();
 	void save();
+#ifdef BUILD_SDL
+	void testGamepad();
+#endif
 
 private:
 	static const qreal DPAD_CENTER_X;
@@ -35,6 +38,11 @@ private:
 
 	void setLocation(QWidget* widget, qreal x, qreal y);
 
+
+#ifdef BUILD_SDL
+	QTimer* m_gamepadTimer;
+#endif
+
 	QWidget* m_buttons;
 	KeyEditor* m_keyDU;
 	KeyEditor* m_keyDD;

src/platform/qt/InputController.cpp

@@ -97,4 +97,18 @@ int InputController::testSDLEvents() {
 	}
 	return activeButtons;
 }
+
+QSet<int> InputController::activeGamepadButtons() {
+	SDL_Joystick* joystick = m_sdlEvents.joystick;
+	SDL_JoystickUpdate();
+	int numButtons = SDL_JoystickNumButtons(joystick);
+	QSet<int> activeButtons;
+	int i;
+	for (i = 0; i < numButtons; ++i) {
+		if (SDL_JoystickGetButton(joystick, i)) {
+			activeButtons.insert(i);
+		}
+	}
+	return activeButtons;
+}
 #endif

src/platform/qt/InputController.h

@@ -9,6 +9,8 @@ extern "C" {
 #endif
 }
 
+#include <QSet>
+
 namespace QGBA {
 
 class ConfigController;
@@ -32,6 +34,7 @@ public:
 
 #ifdef BUILD_SDL
 	int testSDLEvents();
+	QSet<int> activeGamepadButtons();
 #endif
 
 private:

src/platform/qt/KeyEditor.cpp

@@ -6,12 +6,17 @@ using namespace QGBA;
 
 KeyEditor::KeyEditor(QWidget* parent)
 	: QLineEdit(parent)
+	, m_numeric(false)
 {
 	setAlignment(Qt::AlignCenter);
 }
 
 void KeyEditor::setValue(int key) {
+	if (m_numeric) {
+		setText(QString::number(key));
+	} else {
 		setText(QKeySequence(key).toString(QKeySequence::NativeText));
+	}
 	m_key = key;
 	emit valueChanged(key);
 }
@@ -23,6 +28,8 @@ QSize KeyEditor::sizeHint() const {
 }
 
 void KeyEditor::keyPressEvent(QKeyEvent* event) {
+	if (!m_numeric) {
 		setValue(event->key());
+	}
 	event->accept();
 }

src/platform/qt/KeyEditor.h

@@ -14,6 +14,8 @@ public:
 	void setValue(int key);
 	int value() const { return m_key; }
 
+	void setNumeric(bool numeric) { m_numeric = numeric; }
+
 	virtual QSize sizeHint() const override;
 
 signals:
@@ -24,6 +26,7 @@ protected:
 
 private:
 	int m_key;
+	bool m_numeric;
 };
 
 }

src/platform/qt/Window.cpp

@@ -173,6 +173,15 @@ void Window::openKeymapWindow() {
 	keyEditor->show();
 }
 
+#ifdef BUILD_SDL
+void Window::openGamepadWindow() {
+	GBAKeyEditor* keyEditor = new GBAKeyEditor(&m_inputController, SDL_BINDING_BUTTON);
+	connect(this, SIGNAL(shutdown()), keyEditor, SLOT(close()));
+	keyEditor->setAttribute(Qt::WA_DeleteOnClose);
+	keyEditor->show();
+}
+#endif
+
 #ifdef USE_FFMPEG
 void Window::openVideoWindow() {
 	if (!m_videoView) {
@@ -454,6 +463,12 @@ void Window::setupMenu(QMenuBar* menubar) {
 	connect(keymap, SIGNAL(triggered()), this, SLOT(openKeymapWindow()));
 	emulationMenu->addAction(keymap);
 
+#ifdef BUILD_SDL
+	QAction* gamepad = new QAction(tr("Remap gamepad..."), emulationMenu);
+	connect(gamepad, SIGNAL(triggered()), this, SLOT(openGamepadWindow()));
+	emulationMenu->addAction(gamepad);
+#endif
+
 	QMenu* avMenu = menubar->addMenu(tr("Audio/&Video"));
 	QMenu* frameMenu = avMenu->addMenu(tr("Frame size"));
 	QAction* setSize = new QAction(tr("1x"), avMenu);

src/platform/qt/Window.h

@@ -56,6 +56,10 @@ public slots:
 
 	void openKeymapWindow();
 
+#ifdef BUILD_SDL
+	void openGamepadWindow();
+#endif
+
 #ifdef USE_FFMPEG
 	void openVideoWindow();
 #endif