Avoid GtkAlignment with GTK+4

src/gtk/button.cpp

@@ -119,7 +119,17 @@ bool wxButton::Create(wxWindow *parent,
     else if (HasFlag(wxBU_BOTTOM))
         y_alignment = 1.0;
 
+#ifdef __WXGTK4__
+    if (useLabel)
+    {
+        g_object_set(gtk_bin_get_child(GTK_BIN(m_widget)),
+            "xalign", x_alignment, "yalign", y_alignment, NULL);
+    }
+#else
+    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
+    wxGCC_WARNING_RESTORE()
+#endif
 
     if ( useLabel )
         SetLabel(label);
@@ -259,6 +269,13 @@ bool wxButton::DoSetLabelMarkup(const wxString& markup)
 GtkLabel *wxButton::GTKGetLabel() const
 {
     GtkWidget* child = gtk_bin_get_child(GTK_BIN(m_widget));
+#ifdef __WXGTK4__
+    if (GTK_IS_LABEL(child))
+        return GTK_LABEL(child);
+
+    return NULL;
+#else
+    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
     if ( GTK_IS_ALIGNMENT(child) )
     {
         GtkWidget* box = gtk_bin_get_child(GTK_BIN(child));
@@ -274,6 +291,8 @@ GtkLabel *wxButton::GTKGetLabel() const
     }
 
     return GTK_LABEL(child);
+    wxGCC_WARNING_RESTORE()
+#endif
 }
 #endif // wxUSE_MARKUP
 
@@ -283,6 +302,8 @@ void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
     GtkWidget* child = gtk_bin_get_child(GTK_BIN(m_widget));
     GTKApplyStyle(child, style);
 
+#ifndef __WXGTK4__
+    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
     // for buttons with images, the path to the label is (at least in 2.12)
     // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
     if ( GTK_IS_ALIGNMENT(child) )
@@ -297,6 +318,8 @@ void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
             }
         }
     }
+    wxGCC_WARNING_RESTORE()
+#endif
 }
 
 wxSize wxButton::DoGetBestSize() const