Remove hardcoded esc hotkey, make pause/stop hotkey actually toggle rather than just pausing, fix frame advance hotkey

Source/Core/Core/Core.cpp

@@ -629,7 +629,7 @@ State GetState()
 
   if (s_hardware_initialized)
   {
-    if (CPU::IsStepping())
+    if (CPU::IsStepping() || s_frame_step)
       return State::Paused;
 
     return State::Running;

Source/Core/DolphinQt2/HotkeyScheduler.cpp

@@ -89,14 +89,16 @@ static void HandleFrameskipHotkeys()
     if (frame_step_delay_count < frame_step_delay && frame_step_hold)
       frame_step_delay_count++;
 
-    // TODO GUI Update (Depends on an unimplemented feature)
-    // if ((frame_step_count == 0 || frame_step_count == FRAME_STEP_DELAY) && !frame_step_hold)
+    if ((frame_step_count == 0 || frame_step_count == FRAME_STEP_DELAY) && !frame_step_hold)
+    {
+      Core::DoFrameStep();
+      frame_step_hold = true;
+    }
 
     if (frame_step_count < FRAME_STEP_DELAY)
     {
-      ++frame_step_count;
-      if (frame_step_hold)
-        frame_step_hold = false;
+      frame_step_count++;
+      frame_step_hold = false;
     }
 
     if (frame_step_count == FRAME_STEP_DELAY && frame_step_hold &&
@@ -108,8 +110,7 @@ static void HandleFrameskipHotkeys()
 
     return;
   }
-
-  if (frame_step_count > 0)
+  else if (frame_step_count > 0)
   {
     // Reset frame advance
     frame_step_count = 0;
@@ -143,7 +144,7 @@ void HotkeyScheduler::Run()
 
       // Pause and Unpause
       if (IsHotkey(HK_PLAY_PAUSE))
-        emit PauseHotkey();
+        emit TogglePauseHotkey();
 
       // Stop
       if (IsHotkey(HK_STOP))

Source/Core/DolphinQt2/HotkeyScheduler.h

@@ -23,7 +23,7 @@ signals:
   void ExitHotkey();
   void FullScreenHotkey();
   void StopHotkey();
-  void PauseHotkey();
+  void TogglePauseHotkey();
   void ScreenShotHotkey();
   void SetStateSlotHotkey(int slot);
   void StateLoadSlotHotkey();

Source/Core/DolphinQt2/MainWindow.cpp

@@ -271,7 +271,7 @@ void MainWindow::ConnectMenuBar()
 void MainWindow::ConnectHotkeys()
 {
   connect(m_hotkey_scheduler, &HotkeyScheduler::ExitHotkey, this, &MainWindow::close);
-  connect(m_hotkey_scheduler, &HotkeyScheduler::PauseHotkey, this, &MainWindow::Pause);
+  connect(m_hotkey_scheduler, &HotkeyScheduler::TogglePauseHotkey, this, &MainWindow::TogglePause);
   connect(m_hotkey_scheduler, &HotkeyScheduler::StopHotkey, this, &MainWindow::RequestStop);
   connect(m_hotkey_scheduler, &HotkeyScheduler::ScreenShotHotkey, this, &MainWindow::ScreenShot);
   connect(m_hotkey_scheduler, &HotkeyScheduler::FullScreenHotkey, this, &MainWindow::FullScreen);
@@ -322,7 +322,6 @@ void MainWindow::ConnectRenderWidget()
 {
   m_rendering_to_main = false;
   m_render_widget->hide();
-  connect(m_render_widget, &RenderWidget::EscapePressed, this, &MainWindow::RequestStop);
   connect(m_render_widget, &RenderWidget::Closed, this, &MainWindow::ForceStop);
 }
 
@@ -397,6 +396,18 @@ void MainWindow::Pause()
   EnableScreenSaver(true);
 }
 
+void MainWindow::TogglePause()
+{
+  if (Core::GetState() == Core::State::Paused)
+  {
+    Play();
+  }
+  else
+  {
+    Pause();
+  }
+}
+
 void MainWindow::OnStopComplete()
 {
   m_stop_requested = false;
@@ -577,8 +588,8 @@ void MainWindow::HideRenderWidget()
   }
 
   // The following code works around a driver bug that would lead to Dolphin crashing when changing
-  // graphics backends (e.g. OpenGL to Vulkan). To avoid this the render widget is (safely) recreated
-  disconnect(m_render_widget, &RenderWidget::EscapePressed, this, &MainWindow::RequestStop);
+  // graphics backends (e.g. OpenGL to Vulkan). To avoid this the render widget is (safely)
+  // recreated
   disconnect(m_render_widget, &RenderWidget::Closed, this, &MainWindow::ForceStop);
 
   m_render_widget->hide();
@@ -588,7 +599,6 @@ void MainWindow::HideRenderWidget()
   m_render_widget = new RenderWidget;
 
   m_render_widget->installEventFilter(this);
-  connect(m_render_widget, &RenderWidget::EscapePressed, this, &MainWindow::RequestStop);
   connect(m_render_widget, &RenderWidget::Closed, this, &MainWindow::ForceStop);
 }
 

Source/Core/DolphinQt2/MainWindow.h

@@ -53,6 +53,7 @@ private:
   void Open();
   void Play(const std::optional<std::string>& savestate_path = {});
   void Pause();
+  void TogglePause();
 
   // May ask for confirmation. Returns whether or not it actually stopped.
   bool RequestStop();