Esempio n. 1
0
        private void OnCurrentPageChanged(Page page)
        {
            _currentPageSubscription?.Dispose();

            if (page == null)
            {
                return;
            }

            page.BindingContextChanged += bindingContextChanged;

            _currentPageSubscription = new ActionDisposable(() => page.BindingContextChanged -= bindingContextChanged);

            Device.BeginInvokeOnMainThread(() =>
            {
                object bindingContext = null;
                try {
                    bindingContext = page.BindingContext;
                } catch {
                    // Page._properties might not be initialized yet, so BindingContext throws NRE
                }

                if (bindingContext != null)
                {
                    OnCurrentPageBindingContextChanged(bindingContext);
                }
            });

            void bindingContextChanged(object sender, EventArgs e)
            {
                OnCurrentPageBindingContextChanged(page.BindingContext);
            }
        }
Esempio n. 2
0
        private void OnCurrentPageBindingContextChanged(object bindingContext)
        {
            if (bindingContext is INotifyPropertyChanged inpc)
            {
                if (_currentBindingContext != inpc)
                {
                    _currentBindingContextDisposable?.Dispose();

                    var instanceInspector = new InstanceInspector(inpc);

                    inpc.PropertyChanged += inpcPropertyChanged;

                    _currentBindingContext           = inpc;
                    _currentBindingContextDisposable = new ActionDisposable(() => inpc.PropertyChanged -= inpcPropertyChanged);

                    void inpcPropertyChanged(object sender, PropertyChangedEventArgs e)
                    {
                        var existingInspector = instanceInspector.Properties.FirstOrDefault(pi => pi.PropertyInfo.Name == e.PropertyName);

                        if (existingInspector != null)
                        {
                            existingInspector.UpdateValue(inpc);
                        }
                        else
                        {
                            // If property was added without our knowledge (dynamic stuff)
                            var properties = InstanceInspector.GetAllProperties(inpc);
                            var property   = properties.FirstOrDefault(p => p.Name == e.PropertyName);

                            if (property != null)
                            {
                                instanceInspector.Properties.Add(new PropertyInspector(property, inpc));
                            }
                        }

                        SendInstanceUpdate(instanceInspector.Key, instanceInspector.Serialize());
                    }

                    SendInstanceUpdate(instanceInspector.Key, instanceInspector.Serialize());
                }
            }
        }