protected override void Init()
{
var dts = new MyDataTemplateSelector();
var listView = new ListView
{
ItemsSource = Enumerable.Range(0, 100),
ItemTemplate = dts
};
var layout = new StackLayout {
Children = { listView }
};
Content = layout;
listView.ScrollTo(75, ScrollToPosition.MakeVisible, true);
}
public void DataTemplateExtensionsCreateContent()
{
tlog.Debug(tag, $"DataTemplateExtensionsCreateContent START");
var testingTarget = new MyDataTemplateSelector();
try
{
DataTemplateExtensions.CreateContent(testingTarget, View.Property.STATE, new View());
}
catch (Exception e)
{
tlog.Debug(tag, e.Message.ToString());
Assert.Fail("CreateContent Fail!");
}
tlog.Debug(tag, $"DataTemplateExtensionsCreateContent END (OK)");
}
public void DataTemplateSelectorSelectTemplateWithNullLoadTemplate()
{
tlog.Debug(tag, $"DataTemplateSelectorSelectTemplateWithNullLoadTemplate START");
var testingTarget = new MyDataTemplateSelector();
try
{
DataTemplateExtensions.CreateContent(testingTarget, "Color", new View());
}
catch (NotSupportedException e)
{
tlog.Debug(tag, e.Message.ToString());
tlog.Debug(tag, $"DataTemplateSelectorSelectTemplateWithNullLoadTemplate END (OK)");
Assert.Pass("Caught NotSupportedException: Pass!");
}
tlog.Debug(tag, $"DataTemplateSelectorSelectTemplateWithNullLoadTemplate END (OK)");
}
public void ElementTemplateConstructorWithNullLoadTemplate()
{
tlog.Debug(tag, $"ElementTemplateConstructorWithNullLoadTemplate START");
try
{
var testingTarget = new MyDataTemplateSelector();
View view = new View()
{
Color = Color.Cyan,
};
DataTemplateExtensions.CreateContent(testingTarget, View.Property.STATE, view);
}
catch (ArgumentNullException e)
{
tlog.Debug(tag, $"ElementTemplateConstructorWithNullLoadTemplate END (OK)");
tlog.Debug(tag, e.Message.ToString());
Assert.Pass("Caught ArgumentNullException: Pass!");
}
}
public CarouselViewGalleryPage()
{
_items = EmptyItems;
_selector = new MyDataTemplateSelector();
Func <ObservableCollection <Item> > itemsFactory = () =>
_items = new ObservableCollection <Item>()
{
new Baz(),
new Poo(),
new Foo(),
new Bar(),
};
_carouselView = new CarouselView {
BackgroundColor = Color.Purple,
ItemTemplate = _selector,
Position = StartPosition
};
_events = new Queue <string>();
_eventId = 0;
_position = CreateValue($"{_carouselView.Position}", "Position");
_selectedItem = CreateValue("null", "SelectedItem");
_selectedPosition = CreateValue("null", "SelectedPosition");
_eventLog = CreateValue("", "EventLog");
_carouselView.ItemSelected += (s, o) => {
var selectedItem = (Item)o.SelectedItem;
var selectedItemId = selectedItem?.Id.ToString() ?? "null";
if (selectedItem != _carouselView.Item)
{
throw new Exception("CarouselView.Item != ItemSelected");
}
_selectedItem.Text = $"{selectedItemId}";
OnEvent("i");
};
_carouselView.PositionSelected += (s, o) => {
var selectedPosition = (int)o.SelectedPosition;
if (_items != null && _items.Any() && _items[selectedPosition] != _carouselView.Item)
{
throw new Exception("CarouselView.Item != Items[selectedPosition]");
}
_selectedPosition.Text = $"{selectedPosition}";
OnEvent("p");
};
BackgroundColor = Color.Blue;
var moveBar = new StackLayout {
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Start,
Children =
{
CreateButton("<<", "First", () => _carouselView.Position = 0),
CreateButton("<", "Previous", () => {
try {
_carouselView.Position--;
if (_items == EmptyItems)
{
UpdatePosition();
}
} catch (ArgumentException) { OnEvent("e"); }
}),
CreateButton(">", "Next", () => {
try {
_carouselView.Position++;
if (_items == EmptyItems)
{
UpdatePosition();
}
} catch (ArgumentException) { OnEvent("e"); }
}),
CreateButton(">>", "Last", () => _carouselView.Position = _items.Count - 1)
}
};
var loadBar = new StackLayout {
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Start,
Children =
{
CreateButton("Load", "Load", () => {
try {
_carouselView.ItemsSource = _items = itemsFactory();
} catch (ArgumentException) {
OnEvent("e");
}
}),
CreateButton("Load0", "Load0", () => {
try {
_carouselView.ItemsSource = _items = EmptyItems;
} catch (ArgumentException) {
OnEvent("e");
}
}),
CreateButton("Clear", "Clear", () => {
_items = null;
_carouselView.ItemsSource = null;
}),
CreateButton("Add", "Add", () => {
_items.Insert(0, new Moo());
})
}
};
var statusBar = new StackLayout {
Orientation = StackOrientation.Horizontal,
Children =
{
CreateCopy("Pos:"), _position,
CreateCopy("OnItemSel:"), _selectedItem,
CreateCopy("OnPosSel:"), _selectedPosition,
}
};
var logBar = new StackLayout {
Orientation = StackOrientation.Horizontal,
Children = { _eventLog }
};
Content = new StackLayout {
Children =
{
_carouselView,
moveBar,
loadBar,
statusBar,
logBar
}
};
}
public MyUserControl()
{
Resources["MyDataTemplateSelector"] = new MyDataTemplateSelector(this);
InitializeComponent();
}
