fix: Fix the issue where TAB cannot cycle through focus elements.

Signed-off-by: SmileSky <[email protected]>

.changes/element-focus.md

@@ -0,0 +1,5 @@
+---
+'wry': 'patch:enhance'
+---
+
+Allow the use of TAB to cycle through focus elements in an HTML document.

src/webview2/mod.rs

@@ -176,6 +176,16 @@ impl InnerWebView {
       wparam: WPARAM,
       lparam: LPARAM,
     ) -> LRESULT {
+      if msg == WM_SETFOCUS {
+        // Fix https://github.com/DioxusLabs/dioxus/issues/2900
+        // Get the first child window of the window
+        let child = GetWindow(hwnd, GW_CHILD).unwrap_or_default();
+        if child != HWND::default() {
+          // Set focus to the child window(WebView document)
+          let _ = SetFocus(child);
+        }
+      }
+
       DefWindowProcW(hwnd, msg, wparam, lparam)
     }