qt: Add UI to configure mouse buttons

Supports setting the five mouse buttons to any valid controller button/keyboard key (Left, Right, Middle, Foward, Back)

src/yuzu/configuration/configure_mouse_advanced.h

@@ -0,0 +1,67 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include <QWidget>
+#include <boost/optional.hpp>
+#include "core/settings.h"
+
+class QCheckBox;
+class QPushButton;
+class QTimer;
+
+namespace Ui {
+class ConfigureMouseAdvanced;
+}
+
+class ConfigureMouseAdvanced : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit ConfigureMouseAdvanced(QWidget* parent);
+
+    void applyConfiguration();
+
+private:
+    std::unique_ptr<Ui::ConfigureMouseAdvanced> ui;
+
+    /// This will be the the setting function when an input is awaiting configuration.
+    boost::optional<std::function<void(const Common::ParamPackage&)>> input_setter;
+
+    std::array<QPushButton*, Settings::NativeMouseButton::NumMouseButtons> button_map;
+    std::array<Common::ParamPackage, Settings::NativeMouseButton::NumMouseButtons> buttons_param;
+
+    std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>> device_pollers;
+
+    std::unique_ptr<QTimer> timeout_timer;
+    std::unique_ptr<QTimer> poll_timer;
+
+    /// A flag to indicate if keyboard keys are okay when configuring an input. If this is false,
+    /// keyboard events are ignored.
+    bool want_keyboard_keys = false;
+
+    /// Load configuration settings.
+    void loadConfiguration();
+    /// Restore all buttons to their default values.
+    void restoreDefaults();
+    /// Clear all input configuration
+    void ClearAll();
+
+    /// Update UI to reflect current configuration.
+    void updateButtonLabels();
+
+    /// Called when the button was pressed.
+    void handleClick(QPushButton* button,
+                     std::function<void(const Common::ParamPackage&)> new_input_setter,
+                     InputCommon::Polling::DeviceType type);
+
+    /// Finish polling and configure input using the input_setter
+    void setPollingResult(const Common::ParamPackage& params, bool abort);
+
+    /// Handle key press events.
+    void keyPressEvent(QKeyEvent* event) override;
+};