Qt: Support binding settings to QSliders

src/duckstation-qt/settingwidgetbinder.h

@@ -8,6 +8,7 @@
 #include <QtWidgets/QCheckBox>
 #include <QtWidgets/QComboBox>
 #include <QtWidgets/QLineEdit>
+#include <QtWidgets/QSlider>
 
 namespace SettingWidgetBinder {
 
@@ -90,6 +91,25 @@ struct SettingAccessor<QCheckBox>
   }
 };
 
+template<>
+struct SettingAccessor<QSlider>
+{
+  static bool getBoolValue(const QSlider* widget) { return widget->value() > 0; }
+  static void setBoolValue(QSlider* widget, bool value) { widget->setValue(value ? 1 : 0); }
+
+  static int getIntValue(const QSlider* widget) { return widget->value(); }
+  static void setIntValue(QSlider* widget, int value) { widget->setValue(value); }
+
+  static QString getStringValue(const QSlider* widget) { return QStringLiteral("%1").arg(widget->value()); }
+  static void setStringValue(QSlider* widget, const QString& value) { widget->setValue(value.toInt()); }
+
+  template<typename F>
+  static void connectValueChanged(QSlider* widget, F func)
+  {
+    widget->connect(widget, &QSlider::valueChanged, func);
+  }
+};
+
 /// Binds a widget's value to a setting, updating it when the value changes.
 
 template<typename WidgetType>