示例#1
0
        public XamarinListViewScrollToBugPage1()
        {
            Title = "Scroll To in OnAppearing";

            for (int i = 0; i < 100; i++)
            {
                var item = new ListObj {
                    Name = string.Format("{0} {0} {0} {0} {0} {0}", i)
                };
                _collection.Add(item);
            }

            _listView = new ListView
            {
                ItemsSource  = _collection,
                ItemTemplate = new DataTemplate(typeof(CellTemplateScrollTo))
            };

            _listView.AutomationId = "listView";

            Content = new StackLayout
            {
                Children =
                {
                    _listView
                }
            };
        }
示例#2
0
        void BtnAddOnClicked(object sender, EventArgs eventArgs)
        {
            var str  = string.Format("Item {0}", _i++);
            var item = new ListObj {
                Name = string.Format("{0} {0} {0} {0} {0} {0}", _i)
            };

            _collection.Add(item);

            _listView.ScrollTo(item, ScrollToPosition.End, true);
        }
示例#3
0
        public XamarinListViewScrollToBugPage2()
        {
            Padding = new Thickness(10, 50, 10, 0);
            Title   = "Crash in ScrollToPosition.End";

            for (int i = 0; i < 100; i++)
            {
                var item = new ListObj {
                    Name = string.Format("2 {0} {0} {0} {0} {0} {0}", i)
                };
                _collection.Add(item);
            }

            _listView = new ListView
            {
                ItemsSource  = _collection,
                ItemTemplate = new DataTemplate(typeof(CellTemplateScrollTo))
            };

            var endButton = new Button
            {
                Text    = "ScrollToPosition.End End - Not animated",
                Command = new Command(() =>
                {
                    _listView.ScrollTo(_collection.Last(), ScrollToPosition.End, false);
                })
            };

            var endButtonAnimated = new Button
            {
                Text    = "ScrollToPosition.MakeVisible End - Animated",
                Command = new Command(() =>
                {
                    _listView.ScrollTo(_collection.Last(), ScrollToPosition.MakeVisible, true);
                })
            };

            Content = new StackLayout
            {
                Children =
                {
                    endButton,
                    endButtonAnimated,
                    _listView
                }
            };
        }
示例#4
0
        public XamarinListViewScrollToBugPage3()
        {
            Title = "Scroll To in OnAppearing Uneven";

            bool runTest = true;

            // This test will fail in iOS < 9 because using ScrollTo with UnevenRows with estimation is currently not working.
            // It did not previously fail because this test used `TakePerformanceHit` to turn off row estimation. However, as
            // that was never a public feature, it was never a valid fix for the test.
            // https://bugzilla.xamarin.com/show_bug.cgi?id=28277
#if !UITEST
            if (App.IOSVersion < 9)
            {
                runTest = false;
            }
#endif

            if (!runTest)
            {
                _collection.Add(new ListObj {
                    Name = DontRun
                });
            }
            else
            {
                for (_i = 0; _i < 100; _i++)
                {
                    var item = new ListObj {
                        Name = string.Format("{0} {0} {0} {0} {0} {0}", _i)
                    };
                    _collection.Add(item);
                }
            }

            var btnAdd = new Button
            {
                Text         = "Add item",
                WidthRequest = 100
            };
            btnAdd.Clicked += BtnAddOnClicked;

            var btnBottom = new Button
            {
                Text         = "Scroll to end",
                WidthRequest = 100
            };
            btnBottom.Clicked += BtnBottomOnClicked;

            var btnPanel = new StackLayout
            {
                Orientation       = StackOrientation.Horizontal,
                HorizontalOptions = LayoutOptions.Center,
                Children          =
                {
                    btnAdd,
                    btnBottom
                }
            };

            _listView = new ListView
            {
                ItemsSource     = _collection,
                BackgroundColor = Color.Transparent,
                VerticalOptions = LayoutOptions.FillAndExpand,
                HasUnevenRows   = true,
                ItemTemplate    = new DataTemplate(typeof(CellTemplateScrollToUneven))
            };
            _listView.ItemTapped += (sender, e) => ((ListView)sender).SelectedItem = null;

            _listView.AutomationId = "listView";

            Content = new StackLayout
            {
                Children =
                {
                    btnPanel,
                    _listView
                }
            };
        }