Added io.ConfigNavSwapGamepadButtons to swap Activate/Cancel (A<>B) buttons, to match the typical "Nintendo/Japanese consoles" button layout when using Gamepad navigation. (#787, #5723)

docs/CHANGELOG.txt

@@ -76,6 +76,8 @@ Other changes:
 - IO: added io.PlatformOpenInShellFn handler to open a link/folder/file in OS shell. (#7660)
   Default to use ShellExecute() under Windows, and system("") under Mac/Linux/etc.
   Added IMGUI_DISABLE_DEFAULT_SHELL_FUNCTIONS to disable default implementation.
+- IO: added io.ConfigNavSwapGamepadButtons to swap Activate/Cancel (A<>B) buttons, to match tye
+  typical "Nintendo/Japanese consoles" button layout when using Gamepad navigation. (#787, #5723)
 - Added PushItemFlag()/PopItemFlags(), ImGuiItemFlags to modify shared item flags:
   - Added ImGuiItemFlags_NoTabStop to disable tabbing through items.
   - Added ImGuiItemFlags_NoNav to disable any navigation and focus of items. (#787)

imgui.cpp

@@ -1376,6 +1376,7 @@ ImGuiIO::ImGuiIO()
 #else
     ConfigMacOSXBehaviors = false;
 #endif
+    ConfigNavSwapGamepadButtons = false;
     ConfigInputTrickleEventQueue = true;
     ConfigInputTextCursorBlink = true;
     ConfigInputTextEnterKeepActive = false;

imgui.h

@@ -2225,6 +2225,7 @@ struct ImGuiIO
     // Miscellaneous options
     bool        MouseDrawCursor;                // = false          // Request ImGui to draw a mouse cursor for you (if you are on a platform without a mouse cursor). Cannot be easily renamed to 'io.ConfigXXX' because this is frequently used by backend implementations.
     bool        ConfigMacOSXBehaviors;          // = defined(__APPLE__) // Swap Cmd<>Ctrl keys + OS X style text editing cursor movement using Alt instead of Ctrl, Shortcuts using Cmd/Super instead of Ctrl, Line/Text Start and End using Cmd+Arrows instead of Home/End, Double click selects by word instead of selecting whole text, Multi-selection in lists uses Cmd/Super instead of Ctrl.
+    bool        ConfigNavSwapGamepadButtons;    // = false          // Swap Activate<>Cancel (A<>B) buttons, matching typical "Nintendo/Japanese style" gamepad layout.
     bool        ConfigInputTrickleEventQueue;   // = true           // Enable input queue trickling: some types of events submitted during the same frame (e.g. button down + up) will be spread over multiple frames, improving interactions with low framerates.
     bool        ConfigInputTextCursorBlink;     // = true           // Enable blinking cursor (optional as some users consider it to be distracting).
     bool        ConfigInputTextEnterKeepActive; // = false          // [BETA] Pressing Enter will keep item active and select contents (single-line only).

imgui_internal.h

@@ -1355,8 +1355,8 @@ typedef ImBitArray<ImGuiKey_NamedKey_COUNT, -ImGuiKey_NamedKey_BEGIN>    ImBitAr
 #define ImGuiKey_NavKeyboardTweakFast   ImGuiMod_Shift
 #define ImGuiKey_NavGamepadTweakSlow    ImGuiKey_GamepadL1
 #define ImGuiKey_NavGamepadTweakFast    ImGuiKey_GamepadR1
-#define ImGuiKey_NavGamepadActivate     ImGuiKey_GamepadFaceDown
-#define ImGuiKey_NavGamepadCancel       ImGuiKey_GamepadFaceRight
+#define ImGuiKey_NavGamepadActivate     (g.IO.ConfigNavSwapGamepadButtons ? ImGuiKey_GamepadFaceRight : ImGuiKey_GamepadFaceDown)
+#define ImGuiKey_NavGamepadCancel       (g.IO.ConfigNavSwapGamepadButtons ? ImGuiKey_GamepadFaceDown : ImGuiKey_GamepadFaceRight)
 #define ImGuiKey_NavGamepadMenu         ImGuiKey_GamepadFaceLeft
 #define ImGuiKey_NavGamepadInput        ImGuiKey_GamepadFaceUp