Adding Shortcut to Change Disc

Adding ShortCut to F8

simplifying

simplifying the code

src/frontend-common/common_host_interface.cpp

@@ -35,6 +35,7 @@
 #include <cstdio>
 #include <cstring>
 #include <ctime>
+#include "fullscreen_ui.h"
 
 #ifdef WITH_SDL2
 #include "sdl_audio_stream.h"
@@ -54,6 +55,7 @@
 #include <ShlObj.h>
 #include <mmsystem.h>
 #endif
+#include <frontend-common/imgui_fullscreen.cpp>
 
 Log_SetChannel(CommonHostInterface);
 
@@ -1869,6 +1871,17 @@ void CommonHostInterface::RegisterGeneralHotkeys()
                      SaveScreenshot();
                  });
 
+ RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("ChangeDisc"),
+                 StaticString(TRANSLATABLE("Hotkeys", "ChangeDisc")), [this](bool pressed) {
+                   if (pressed && System::IsValid())
+                   {
+                     int current = System::GetMediaSubImageIndex();
+                     int next = (current + 1) % System::GetMediaSubImageCount();
+                     if (current != next)
+                       System::SwitchMediaSubImage(static_cast<u32>(next));
+                   }
+                 });
+
   RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("FrameStep"),
                  StaticString(TRANSLATABLE("Hotkeys", "Frame Step")), [this](bool pressed) {
                    if (pressed && System::IsValid())
@@ -2550,6 +2563,7 @@ void CommonHostInterface::SetDefaultSettings(SettingsInterface& si)
   si.SetStringValue("Hotkeys", "IncreaseResolutionScale", "Keyboard/PageUp");
   si.SetStringValue("Hotkeys", "DecreaseResolutionScale", "Keyboard/PageDown");
   si.SetStringValue("Hotkeys", "ToggleSoftwareRendering", "Keyboard/End");
+  si.SetStringValue("Hotkeys", "ChangeDisc", "Keyboard/F8");
 
   si.SetStringValue("Main", "ControllerBackend",
                     ControllerInterface::GetBackendName(ControllerInterface::GetDefaultBackend()));