Qt: Simplify runahead settings

src/duckstation-qt/emulationsettingswidget.cpp

@@ -18,8 +18,7 @@ EmulationSettingsWidget::EmulationSettingsWidget(QtHostInterface* host_interface
   SettingWidgetBinder::BindWidgetToFloatSetting(m_host_interface, m_ui.rewindSaveFrequency, "Main", "RewindFrequency",
                                                 10.0f);
   SettingWidgetBinder::BindWidgetToIntSetting(m_host_interface, m_ui.rewindSaveSlots, "Main", "RewindSaveSlots", 10);
-  SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.runaheadEnable, "Main", "RunaheadEnable", false);
-  SettingWidgetBinder::BindWidgetToIntSetting(m_host_interface, m_ui.runaheadFrames, "Main", "RunaheadFrames", 1);
+  SettingWidgetBinder::BindWidgetToIntSetting(m_host_interface, m_ui.runaheadFrames, "Main", "RunaheadFrameCount", 0);
 
   QtUtils::FillComboBoxWithEmulationSpeeds(m_ui.emulationSpeed);
   const int emulation_speed_index =
@@ -43,12 +42,13 @@ EmulationSettingsWidget::EmulationSettingsWidget(QtHostInterface* host_interface
   connect(m_ui.turboSpeed, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
           &EmulationSettingsWidget::onTurboSpeedIndexChanged);
 
-  connect(m_ui.rewindEnable, &QCheckBox::stateChanged, this, &EmulationSettingsWidget::updateRewindSummaryLabel);
+  connect(m_ui.rewindEnable, &QCheckBox::stateChanged, this, &EmulationSettingsWidget::updateRewind);
   connect(m_ui.rewindSaveFrequency, QOverload<double>::of(&QDoubleSpinBox::valueChanged), this,
-          &EmulationSettingsWidget::updateRewindSummaryLabel);
+          &EmulationSettingsWidget::updateRewind);
   connect(m_ui.rewindSaveSlots, QOverload<int>::of(&QSpinBox::valueChanged), this,
-          &EmulationSettingsWidget::updateRewindSummaryLabel);
-  connect(m_ui.runaheadEnable, &QCheckBox::stateChanged, this, &EmulationSettingsWidget::updateRunaheadFields);
+          &EmulationSettingsWidget::updateRewind);
+  connect(m_ui.runaheadFrames, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
+          &EmulationSettingsWidget::updateRewind);
 
   dialog->registerWidgetHelp(
     m_ui.emulationSpeed, tr("Emulation Speed"), "100%",
@@ -69,8 +69,7 @@ EmulationSettingsWidget::EmulationSettingsWidget(QtHostInterface* host_interface
        "the console's refresh rate is too far from the host's refresh rate. Users with variable refresh rate displays "
        "should disable this option."));
 
-  updateRewindSummaryLabel();
-  updateRunaheadFields();
+  updateRewind();
 }
 
 EmulationSettingsWidget::~EmulationSettingsWidget() = default;
@@ -99,8 +98,10 @@ void EmulationSettingsWidget::onTurboSpeedIndexChanged(int index)
   m_host_interface->applySettings();
 }
 
-void EmulationSettingsWidget::updateRewindSummaryLabel()
+void EmulationSettingsWidget::updateRewind()
 {
+  m_ui.rewindEnable->setEnabled(!runaheadEnabled());
+
   if (m_ui.rewindEnable->isEnabled() && m_ui.rewindEnable->isChecked())
   {
     const u32 frames = static_cast<u32>(m_ui.rewindSaveSlots->value());
@@ -124,7 +125,8 @@ void EmulationSettingsWidget::updateRewindSummaryLabel()
   {
     if (!m_ui.rewindEnable->isEnabled())
     {
-      m_ui.rewindSummary->setText(tr("Rewind is disabled because runahead is enabled."));
+      m_ui.rewindSummary->setText(tr(
+        "Rewind is disabled because runahead is enabled. Runahead will significantly increase system requirements."));
     }
     else
     {
@@ -135,10 +137,3 @@ void EmulationSettingsWidget::updateRewindSummaryLabel()
     m_ui.rewindSaveSlots->setEnabled(false);
   }
 }
-
-void EmulationSettingsWidget::updateRunaheadFields()
-{
-  m_ui.runaheadFrames->setEnabled(m_ui.runaheadEnable->isChecked());
-  m_ui.rewindEnable->setEnabled(!m_ui.runaheadEnable->isChecked());
-  updateRewindSummaryLabel();
-}

src/duckstation-qt/emulationsettingswidget.h

@@ -19,10 +19,10 @@ private Q_SLOTS:
   void onEmulationSpeedIndexChanged(int index);
   void onFastForwardSpeedIndexChanged(int index);
   void onTurboSpeedIndexChanged(int index);
-  void updateRewindSummaryLabel();
-  void updateRunaheadFields();
+  void updateRewind();
 
 private:
+  bool runaheadEnabled() { return m_ui.runaheadFrames->currentIndex() > 0; }
 
   Ui::EmulationSettingsWidget m_ui;
 

src/duckstation-qt/emulationsettingswidget.ui

@@ -75,7 +75,7 @@
    <item>
     <widget class="QGroupBox" name="groupBox">
      <property name="title">
-      <string>Rewind</string>
+      <string>Rewind/Runahead</string>
      </property>
      <layout class="QFormLayout" name="formLayout">
       <item row="0" column="0" colspan="2">
@@ -125,7 +125,73 @@
         </property>
        </widget>
       </item>
-      <item row="3" column="0" colspan="2">
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Runahead:</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QComboBox" name="runaheadFrames">
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>1 Frame</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>2 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>3 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>4 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>5 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>6 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>7 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>8 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>9 Frames</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>10 Frames</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="4" column="0" colspan="2">
        <widget class="QLabel" name="rewindSummary">
         <property name="text">
          <string>TextLabel</string>
@@ -138,42 +204,6 @@
      </layout>
     </widget>
    </item>
-   <item>
-    <widget class="QGroupBox" name="groupBox_2">
-     <property name="title">
-      <string>Runahead</string>
-     </property>
-     <layout class="QFormLayout" name="formLayout_3">
-      <item row="0" column="0">
-       <widget class="QCheckBox" name="runaheadEnable">
-        <property name="text">
-         <string>Enable Runahead</string>
-        </property>
-       </widget>
-      </item>
-      <item row="1" column="0">
-       <widget class="QLabel" name="label_3">
-        <property name="text">
-         <string>Runahead Frames:</string>
-        </property>
-       </widget>
-      </item>
-      <item row="1" column="1">
-       <widget class="QSpinBox" name="runaheadFrames">
-        <property name="suffix">
-         <string> Frames</string>
-        </property>
-        <property name="minimum">
-         <number>1</number>
-        </property>
-        <property name="maximum">
-         <number>20</number>
-        </property>
-       </widget>
-      </item>
-     </layout>
-    </widget>
-   </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">