Esempio n. 1
0
        protected override void OnPropertyChanging([CallerMemberName] string propertyName = null)
        {
            base.OnPropertyChanging(propertyName);

            if (propertyName == ItemsSourceProperty.PropertyName)
            {
                if (ItemsSource != null)
                {
                    if (ItemsSource is INotifyCollectionChanged itemsSource)
                    {
                        itemsSource.CollectionChanged -= ItemsSource_CollectionChanged;
                    }

                    _useItemsSource = false;

                    Tabs.Clear();
                }
            }
            else if (propertyName == SelectedTabIndexProperty.PropertyName)
            {
                if (SelectedTabIndex == -1)
                {
                    _prevSelectedTabItem = null;
                }
                else
                {
                    _prevSelectedTabItem = Tabs.ElementAtOrDefault(SelectedTabIndex);
                }
            }
        }
Esempio n. 2
0
        private void InitContentTemplate(object item, TabViewItem tabItem)
        {
            if (ContentTemplate != null)
            {
                var template = ContentTemplate;
                if (ContentTemplate is DataTemplateSelector selector)
                {
                    template = selector.SelectTemplate(item, this);
                }

                var tabContent = template.CreateContent() as View;
                if (tabContent.BindingContext == null)
                {
                    tabContent.BindingContext = item;
                }

                tabItem.Content = tabContent;
            }
            else
            {
                var tabContent = new Label();
                tabContent.Text = item.ToString();

                tabItem.Content = tabContent;
            }
        }
Esempio n. 3
0
        private void InitItems(IEnumerable source, bool useIndex = false, int index = 0)
        {
            if (source == null)
            {
                return;
            }

            foreach (var item in source)
            {
                var tabItem = new TabViewItem();
                InitContentTemplate(item, tabItem);

                tabItem.BindingContext = item;
                tabItem.Header         = item;

                if (useIndex)
                {
                    Tabs.Insert(index, tabItem);
                }
                else
                {
                    Tabs.Add(tabItem);
                }
            }
        }
Esempio n. 4
0
        private void SelectClosestTab(TabViewItem tab, List <TabViewItem> tabs)
        {
            if (tabs.Count == 1)
            {
                SelectedTabIndex = -1;
            }
            else
            {
                var index = tabs.IndexOf(tab);

                if (index == tabs.Count - 1)
                {
                    var tabToSelect = tabs.ElementAtOrDefault(index - 1);
                    SelectedTabIndex = Tabs.IndexOf(tabToSelect);
                }
                else if (index >= 0)
                {
                    var tabToSelect = tabs.ElementAtOrDefault(index + 1);
                    SelectedTabIndex = Tabs.IndexOf(tabToSelect);
                }
            }
        }