Add wxEVT_WEBVIEW_FULLSCREEN_CHANGED event

The event is triggered by wxWebView when the page requests fullscreen view.

It's currently only implemented for the edge backend.

include/wx/msw/private/webview_edge.h

@@ -46,6 +46,7 @@ public:
     EventRegistrationToken m_newWindowRequestedToken = { };
     EventRegistrationToken m_documentTitleChangedToken = { };
     EventRegistrationToken m_contentLoadingToken = { };
+    EventRegistrationToken m_containsFullScreenElementChangedToken = { };
 
     // WebView Event handlers
     HRESULT OnNavigationStarting(ICoreWebView2* sender, ICoreWebView2NavigationStartingEventArgs* args);
@@ -54,6 +55,7 @@ public:
     HRESULT OnNewWindowRequested(ICoreWebView2* sender, ICoreWebView2NewWindowRequestedEventArgs* args);
     HRESULT OnDocumentTitleChanged(ICoreWebView2* sender, IUnknown* args);
     HRESULT OnContentLoading(ICoreWebView2* sender, ICoreWebView2ContentLoadingEventArgs* args);
+    HRESULT OnContainsFullScreenElementChanged(ICoreWebView2* sender, IUnknown* args);
 
     HRESULT OnEnvironmentCreated(HRESULT result, ICoreWebView2Environment* environment);
     HRESULT OnWebViewCreated(HRESULT result, ICoreWebView2Controller* webViewController);

include/wx/webview.h

@@ -294,6 +294,7 @@ wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_WEBVIEW, wxEVT_WEBVIEW_LOADED, wxWebViewEv
 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_WEBVIEW, wxEVT_WEBVIEW_ERROR, wxWebViewEvent );
 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_WEBVIEW, wxEVT_WEBVIEW_NEWWINDOW, wxWebViewEvent );
 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_WEBVIEW, wxEVT_WEBVIEW_TITLE_CHANGED, wxWebViewEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_WEBVIEW, wxEVT_WEBVIEW_FULLSCREEN_CHANGED, wxWebViewEvent);
 
 typedef void (wxEvtHandler::*wxWebViewEventFunction)
              (wxWebViewEvent&);

interface/wx/webview.h

@@ -428,6 +428,10 @@ public:
     @event{EVT_WEBVIEW_TITLE_CHANGED(id, func)}
        Process a @c wxEVT_WEBVIEW_TITLE_CHANGED event, generated when
        the page title changes. Use GetString to get the title.
+    @event{EVT_WEBVIEW_FULL_SCREEN_CHANGED(id, func)}
+       Process a @c EVT_WEBVIEW_FULL_SCREEN_CHANGED event, generated when
+       the page wants to enter or leave fullscreen. Use GetInt to get the status.
+       Currently only implemented for the edge backend.
     @endEventTable
 
     @since 2.9.3

samples/webview/webview.cpp

@@ -120,6 +120,7 @@ public:
     void OnDocumentLoaded(wxWebViewEvent& evt);
     void OnNewWindow(wxWebViewEvent& evt);
     void OnTitleChanged(wxWebViewEvent& evt);
+    void OnFullScreenChanged(wxWebViewEvent& evt);
     void OnSetPage(wxCommandEvent& evt);
     void OnViewSourceRequest(wxCommandEvent& evt);
     void OnViewTextRequest(wxCommandEvent& evt);
@@ -536,6 +537,7 @@ WebFrame::WebFrame(const wxString& url) :
     Bind(wxEVT_WEBVIEW_ERROR, &WebFrame::OnError, this, m_browser->GetId());
     Bind(wxEVT_WEBVIEW_NEWWINDOW, &WebFrame::OnNewWindow, this, m_browser->GetId());
     Bind(wxEVT_WEBVIEW_TITLE_CHANGED, &WebFrame::OnTitleChanged, this, m_browser->GetId());
+    Bind(wxEVT_WEBVIEW_FULLSCREEN_CHANGED, &WebFrame::OnFullScreenChanged, this, m_browser->GetId());
 
     // Connect the menu events
     Bind(wxEVT_MENU, &WebFrame::OnSetPage, this, setPage->GetId());
@@ -897,6 +899,12 @@ void WebFrame::OnTitleChanged(wxWebViewEvent& evt)
     wxLogMessage("%s", "Title changed; title='" + evt.GetString() + "'");
 }
 
+void WebFrame::OnFullScreenChanged(wxWebViewEvent & evt)
+{
+    wxLogMessage("Full screen changed; status = %d", evt.GetInt());
+    ShowFullScreen(evt.GetInt() != 0);
+}
+
 void WebFrame::OnSetPage(wxCommandEvent& WXUNUSED(evt))
 {
     m_browser->SetPage

src/common/webview.cpp

@@ -48,6 +48,7 @@ wxDEFINE_EVENT( wxEVT_WEBVIEW_LOADED, wxWebViewEvent );
 wxDEFINE_EVENT( wxEVT_WEBVIEW_ERROR, wxWebViewEvent );
 wxDEFINE_EVENT( wxEVT_WEBVIEW_NEWWINDOW, wxWebViewEvent );
 wxDEFINE_EVENT( wxEVT_WEBVIEW_TITLE_CHANGED, wxWebViewEvent );
+wxDEFINE_EVENT( wxEVT_WEBVIEW_FULLSCREEN_CHANGED, wxWebViewEvent);
 
 wxStringWebViewFactoryMap wxWebView::m_factoryMap;
 

src/msw/webview_edge.cpp

@@ -72,6 +72,7 @@ wxWebViewEdgeImpl::~wxWebViewEdgeImpl()
         m_webView->remove_NewWindowRequested(m_newWindowRequestedToken);
         m_webView->remove_DocumentTitleChanged(m_documentTitleChangedToken);
         m_webView->remove_ContentLoading(m_contentLoadingToken);
+        m_webView->remove_ContainsFullScreenElementChanged(m_containsFullScreenElementChangedToken);
     }
 }
 
@@ -296,6 +297,22 @@ HRESULT wxWebViewEdgeImpl::OnContentLoading(ICoreWebView2* WXUNUSED(sender), ICo
     return S_OK;
 }
 
+HRESULT wxWebViewEdgeImpl::OnContainsFullScreenElementChanged(ICoreWebView2* WXUNUSED(sender), IUnknown* WXUNUSED(args))
+{
+    BOOL containsFullscreenEvent;
+    HRESULT hr = m_webView->get_ContainsFullScreenElement(&containsFullscreenEvent);
+    if (FAILED(hr))
+        return hr;
+
+    wxWebViewEvent event(wxEVT_WEBVIEW_FULLSCREEN_CHANGED, m_ctrl->GetId(),
+        m_ctrl->GetCurrentURL(), "");
+    event.SetEventObject(m_ctrl);
+    event.SetInt(containsFullscreenEvent);
+    m_ctrl->HandleWindowEvent(event);
+
+    return S_OK;
+}
+
 HRESULT wxWebViewEdgeImpl::OnWebViewCreated(HRESULT result, ICoreWebView2Controller* webViewController)
 {
     if (FAILED(result))
@@ -341,6 +358,10 @@ HRESULT wxWebViewEdgeImpl::OnWebViewCreated(HRESULT result, ICoreWebView2Control
         Callback<ICoreWebView2ContentLoadingEventHandler>(
             this, &wxWebViewEdgeImpl::OnContentLoading).Get(),
         &m_contentLoadingToken);
+    m_webView->add_ContainsFullScreenElementChanged(
+        Callback<ICoreWebView2ContainsFullScreenElementChangedEventHandler>(
+            this, &wxWebViewEdgeImpl::OnContainsFullScreenElementChanged).Get(),
+        &m_containsFullScreenElementChangedToken);
 
     if (m_pendingContextMenuEnabled != -1)
     {