internal/gamepad: give a window from another package instead of GetActiveWindow

GetActiveWindow doesn't work on Xbox.

Updates #2084

internal/gamepad/gamepad.go

@@ -60,6 +60,10 @@ func Get(id ID) *Gamepad {
 	return theGamepads.get(id)
 }
 
+func SetNativeWindow(nativeWindow uintptr) {
+	theGamepads.setNativeWindow(nativeWindow)
+}
+
 func (g *gamepads) appendGamepadIDs(ids []ID) []ID {
 	g.m.Lock()
 	defer g.m.Unlock()
@@ -158,6 +162,16 @@ func (g *gamepads) remove(cond func(*Gamepad) bool) {
 	}
 }
 
+func (g *gamepads) setNativeWindow(nativeWindow uintptr) {
+	g.m.Lock()
+	defer g.m.Unlock()
+
+	var n interface{} = &g.nativeGamepads
+	if n, ok := n.(interface{ setNativeWindow(uintptr) }); ok {
+		n.setNativeWindow(nativeWindow)
+	}
+}
+
 type Gamepad struct {
 	name  string
 	sdlID string

internal/gamepad/gamepad_windows.go

@@ -113,6 +113,7 @@ type nativeGamepads struct {
 	enumDevicesCallback uintptr
 	enumObjectsCallback uintptr
 
+	nativeWindow  windows.HWND
 	deviceChanged int32
 	err           error
 }
@@ -518,7 +519,8 @@ func (g *nativeGamepads) update(gamepads *gamepads) error {
 		if g.wndProcCallback == 0 {
 			g.wndProcCallback = windows.NewCallback(g.wndProc)
 		}
-		h, err := _SetWindowLongPtrW(_GetActiveWindow(), _GWL_WNDPROC, g.wndProcCallback)
+		// Note that a Win32API GetActiveWindow doesn't work on Xbox.
+		h, err := _SetWindowLongPtrW(g.nativeWindow, _GWL_WNDPROC, g.wndProcCallback)
 		if err != nil {
 			return err
 		}
@@ -543,6 +545,10 @@ func (g *nativeGamepads) wndProc(hWnd uintptr, uMsg uint32, wParam, lParam uintp
 	return _CallWindowProcW(g.origWndProc, hWnd, uMsg, wParam, lParam)
 }
 
+func (g *nativeGamepads) setNativeWindow(nativeWindow uintptr) {
+	g.nativeWindow = windows.HWND(nativeWindow)
+}
+
 type nativeGamepad struct {
 	dinputDevice  *_IDirectInputDevice8W
 	dinputObjects []dinputObject

internal/ui/ui_glfw.go

@@ -28,6 +28,7 @@ import (
 	"time"
 
 	"github.com/hajimehoshi/ebiten/v2/internal/devicescale"
+	"github.com/hajimehoshi/ebiten/v2/internal/gamepad"
 	"github.com/hajimehoshi/ebiten/v2/internal/glfw"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
 	"github.com/hajimehoshi/ebiten/v2/internal/hooks"
@@ -921,6 +922,8 @@ func (u *userInterfaceImpl) init() error {
 		g.SetWindow(u.nativeWindow())
 	}
 
+	gamepad.SetNativeWindow(u.nativeWindow())
+
 	return nil
 }