protected override void Init()
{
var layout = new StackLayout();
var instructions = new Label
{
Margin = new Thickness(6),
Text = "The CarouselView below should render 5 items."
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = GetCarouselTemplate()
};
carouselView.SetBinding(ItemsView.ItemsSourceProperty, "Items");
layout.Children.Add(instructions);
layout.Children.Add(carouselView);
Content = layout;
}
protected override void Init()
{
var layout = new StackLayout();
var instructions = new Label
{
Margin = new Thickness(6),
Text = "Change the CarouselView FlowDirection and verify that it works correctly."
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var carouselView = new CarouselView
{
FlowDirection = FlowDirection.RightToLeft,
ItemsLayout = itemsLayout,
ItemTemplate = GetCarouselTemplate()
};
carouselView.SetBinding(ItemsView.ItemsSourceProperty, "Items");
var flowDirectionButton = new Button
{
Text = "Change FlowDirection"
};
var flowDirectionLabel = new Label
{
Text = carouselView.FlowDirection.ToString()
};
layout.Children.Add(instructions);
layout.Children.Add(carouselView);
layout.Children.Add(flowDirectionButton);
layout.Children.Add(flowDirectionLabel);
flowDirectionButton.Clicked += (sender, args) =>
{
if (carouselView.FlowDirection == FlowDirection.RightToLeft)
{
carouselView.FlowDirection = FlowDirection.LeftToRight;
flowDirectionLabel.Text = "LeftToRight";
}
else
{
carouselView.FlowDirection = FlowDirection.RightToLeft;
flowDirectionLabel.Text = "RightToLeft";
}
};
Content = layout;
}
protected override void Init()
{
var layout = new StackLayout();
var instructions = new Label
{
Margin = new Thickness(6),
BackgroundColor = Color.Black,
TextColor = Color.White,
Text = "Press the Button to update the ItemsSource of the CarouselView below. After updating, verify that the IndicatorView is still visible. If it is visible, the test has passed."
};
var updateButton = new Button
{
Text = "Update ItemsSource"
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = GetCarouselTemplate()
};
carouselView.SetBinding(ItemsView.ItemsSourceProperty, "Items");
var indicatorView = new IndicatorView
{
IndicatorColor = Color.Red,
SelectedIndicatorColor = Color.Green,
IndicatorTemplate = GetIndicatorTemplate(),
HorizontalOptions = LayoutOptions.Center,
Margin = new Thickness(0, 0, 0, 24)
};
carouselView.IndicatorView = indicatorView;
layout.Children.Add(instructions);
layout.Children.Add(updateButton);
layout.Children.Add(carouselView);
layout.Children.Add(indicatorView);
Content = layout;
updateButton.Clicked += (sender, args) =>
{
var vm = (Issue8693ViewModel)BindingContext;
vm.LoadItems();
};
}
public ExtendedCarousel()
{
HorizontalScrollBarVisibility = ScrollBarVisibility.Never;
VerticalScrollBarVisibility = ScrollBarVisibility.Never;
IsScrollAnimated = true;
ItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsAlignment = SnapPointsAlignment.Center,
SnapPointsType = SnapPointsType.MandatorySingle
};
}
public void SnapPointsDoNotCrashOnOlderAPIs()
{
var cv = new CollectionView();
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical)
{
SnapPointsType = SnapPointsType.Mandatory
};
cv.ItemsLayout = itemsLayout;
// Creating the renderer is enough to cause the ClassNotFoundException on older APIs
GetRenderer(cv).Dispose();
}
public async Task SnapPointsDoNotCrashOnOlderAPIs()
{
var cv = new CollectionView();
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical)
{
SnapPointsType = SnapPointsType.Mandatory
};
cv.ItemsLayout = itemsLayout;
// Creating the renderer is enough to cause the ClassNotFoundException on older APIs
await Device.InvokeOnMainThreadAsync(() => { GetRenderer(cv).Dispose(); });
}
public async Task SnapPointsDoNotCrashOnOlderAPIs()
{
var cv = new Microsoft.Maui.Controls.CollectionView();
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical)
{
SnapPointsType = SnapPointsType.Mandatory
};
cv.ItemsLayout = itemsLayout;
// Creating the renderer is enough to cause the ClassNotFoundException on older APIs
await cv.Dispatcher.DispatchAsync(() => { GetRenderer(cv).Dispose(); });
}
public override async void OnNavigatedTo(INavigationParameters parameters)
{
if (string.IsNullOrWhiteSpace(Preferences.Get("search", string.Empty)))
{
AllShows = await graphQL.MovieQuery("allShows", "thumbnail", "title");
ColViewLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical);
}
for (int i = 0; i < AllShows.Count; i++)
{
AllShows[i].ShowInfoCommand = new DelegateCommand <MovieModel>(async(show) => await ShowPopup(show));
}
IsSearchVisible = false;
}
public ReferringSitesCollectionView()
{
AutomationId = ReferringSitesPageAutomationIds.CollectionView;
BackgroundColor = Color.Transparent;
ItemTemplate = new ReferringSitesDataTemplate();
SelectionMode = SelectionMode.Single;
ItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical);
//Set iOS Header to `new BoxView { HeightRequest = titleRowHeight + titleTopMargin }` following this bug fix: https://github.com/xamarin/Xamarin.Forms/issues/9879
Header = Device.RuntimePlatform is Device.iOS ? null : new BoxView {
HeightRequest = ReferringSitesDataTemplate.BottomPadding
};
Footer = Device.RuntimePlatform is Device.iOS ? null : new BoxView {
HeightRequest = ReferringSitesDataTemplate.TopPadding
};
EmptyView = new EmptyDataView("EmptyReferringSitesList", ReferringSitesPageAutomationIds.EmptyDataView);
}
public ReferringSitesCollectionView()
{
AutomationId = ReferringSitesPageAutomationIds.CollectionView;
BackgroundColor = Color.Transparent;
ItemTemplate = new ReferringSitesDataTemplateSelector();
SelectionMode = SelectionMode.Single;
ItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Vertical);
//iOS Header + Footer break CollectionView after Refresh bug: https://github.com/xamarin/Xamarin.Forms/issues/9879
Header = Device.RuntimePlatform is Device.iOS ? null : new BoxView {
HeightRequest = ReferringSitesDataTemplateSelector.BottomPadding
};
Footer = Device.RuntimePlatform is Device.iOS ? null : new BoxView {
HeightRequest = ReferringSitesDataTemplateSelector.TopPadding
};
EmptyView = new EmptyDataView("EmptyReferringSitesList", ReferringSitesPageAutomationIds.EmptyDataView);
}
public void BindingContextPropagatesLayouts()
{
var bindingContext = new object();
var itemsView = new StructuredItemsView();
itemsView.BindingContext = bindingContext;
var linearItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal);
itemsView.ItemsLayout = linearItemsLayout;
// BindingContext is set when ItemsLayout is set
Assert.AreEqual(itemsView.BindingContext, linearItemsLayout.BindingContext);
// BindingContext is updated when BindingContext on ItemsView is changed
bindingContext = new object();
itemsView.BindingContext = bindingContext;
Assert.AreEqual(itemsView.BindingContext, linearItemsLayout.BindingContext);
}
public CarouselItemsGallery()
{
var viewModel = new CarouselItemsGalleryViewModel();
Title = $"CarouselView (Indicators)";
var grid = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
ItemsSource = viewModel.Items,
IsScrollAnimated = true,
IsBounceEnabled = true,
EmptyView = "This is the empty view",
PeekAreaInsets = new Thickness(50)
};
var absolute = new AbsoluteLayout();
absolute.Children.Add(carouselView, new Rectangle(0, 0, 1, 1), AbsoluteLayoutFlags.All);
var indicators = new IndicatorView
{
Margin = new Thickness(15, 20),
IndicatorColor = Color.Gray,
SelectedIndicatorColor = Color.Black,
IndicatorsShape = IndicatorShape.Square
};
//carouselView.IndicatorView = indicators;
absolute.Children.Add(indicators, new Rectangle(.5, 1, -1, -1), AbsoluteLayoutFlags.PositionProportional);
grid.Children.Add(absolute, 0, 0);
var stacklayoutButtons = new StackLayout
{
Orientation = StackOrientation.Horizontal
};
var addItemButton = new Button
{
Text = "Add Item"
};
addItemButton.Clicked += (sender, e) =>
{
viewModel.Items.Add(new CarouselData
{
Color = Color.Red,
Name = $"{viewModel.Items.Count + 1}"
});
carouselView.Position = viewModel.Items.Count - 1;
};
var removeItemButton = new Button
{
Text = "Remove Item"
};
removeItemButton.Clicked += (sender, e) =>
{
if (viewModel.Items.Any())
{
viewModel.Items.RemoveAt(viewModel.Items.Count - 1);
}
if (viewModel.Items.Count > 0)
{
carouselView.Position = viewModel.Items.Count - 1;
}
};
var clearItemsButton = new Button
{
Text = "Clear Items"
};
clearItemsButton.Clicked += (sender, e) =>
{
viewModel.Items.Clear();
};
stacklayoutButtons.Children.Add(addItemButton);
stacklayoutButtons.Children.Add(removeItemButton);
stacklayoutButtons.Children.Add(clearItemsButton);
grid.Children.Add(stacklayoutButtons, 0, 1);
Content = grid;
BindingContext = viewModel;
}
public CollectionCarouselViewGallery()
{
Title = "Working with ObservableCollections and CarouselView";
BindingContext = new CollectionCarouselViewGalleryViewModel();
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
HeightRequest = 300,
BackgroundColor = Color.Pink,
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
IsScrollAnimated = true,
IsBounceEnabled = true,
AutomationId = "TheCarouselView",
};
carouselView.SetBinding(ItemsView.ItemsSourceProperty, "Items");
var scroll = new ScrollView();
var stack = new StackLayout();
scroll.Content = stack;
var lblPosition = new Label
{
HorizontalOptions = LayoutOptions.Center,
BindingContext = carouselView,
AutomationId = "lblPosition"
};
var lblCenterIndex = new Label
{
HorizontalOptions = LayoutOptions.Center,
BindingContext = carouselView,
AutomationId = "lblCenterIndex"
};
lblPosition.SetBinding(Label.TextProperty, nameof(CarouselView.Position));
carouselView.Scrolled += (s, e) =>
{
lblCenterIndex.Text = $"First {e.FirstVisibleItemIndex} CenterIndex: {e.CenterItemIndex} Last: {e.LastVisibleItemIndex}";
};
var clearButton = new Button
{
Text = "Clear"
};
clearButton.SetBinding(Button.CommandProperty, "ClearCommand");
var newObservableButton = new Button
{
Text = "Set new ObservableCollection",
AutomationId = "btnNewObservable"
};
newObservableButton.SetBinding(Button.CommandProperty, "NewObservableCommand");
var addObservableButton = new Button
{
Text = "Add new Items to ObservableCollection",
AutomationId = "btnAddObservable"
};
addObservableButton.SetBinding(Button.CommandProperty, "NewItemsObservableCommand");
var threadObservableButton = new Button
{
Text = "Use ObservableCollection (Threads)"
};
threadObservableButton.SetBinding(Button.CommandProperty, "TheadCommand");
stack.Children.Add(lblPosition);
stack.Children.Add(lblCenterIndex);
stack.Children.Add(clearButton);
stack.Children.Add(newObservableButton);
stack.Children.Add(addObservableButton);
stack.Children.Add(threadObservableButton);
layout.Children.Add(carouselView, 0, 0);
layout.Children.Add(scroll, 0, 1);
Content = layout;
}
public CollectionCarouselViewGallery()
{
Title = "Working with ObservableCollections and CarouselView";
BindingContext = new CollectionCarouselViewGalleryViewModel();
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
HeightRequest = 300,
BackgroundColor = Color.Pink,
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
IsScrollAnimated = true,
IsBounceEnabled = true
};
carouselView.SetBinding(ItemsView.ItemsSourceProperty, "Items");
var scroll = new ScrollView();
var stack = new StackLayout();
scroll.Content = stack;
var clearButton = new Button
{
Text = "Clear"
};
clearButton.SetBinding(Button.CommandProperty, "ClearCommand");
var newObservableButton = new Button
{
Text = "Set new ObservableCollection"
};
newObservableButton.SetBinding(Button.CommandProperty, "NewObservableCommand");
var addObservableButton = new Button
{
Text = "Add new Items to ObservableCollection"
};
addObservableButton.SetBinding(Button.CommandProperty, "NewItemsObservableCommand");
var threadObservableButton = new Button
{
Text = "Use ObservableCollection (Threads)"
};
threadObservableButton.SetBinding(Button.CommandProperty, "TheadCommand");
stack.Children.Add(clearButton);
stack.Children.Add(newObservableButton);
stack.Children.Add(addObservableButton);
stack.Children.Add(threadObservableButton);
layout.Children.Add(carouselView, 0, 0);
layout.Children.Add(scroll, 0, 1);
Content = layout;
}
public ListViewLayout(LinearItemsLayout itemsLayout, ItemSizingStrategy itemSizingStrategy) : base(itemsLayout, itemSizingStrategy)
{
}
public IndicatorCodeGallery()
{
Title = "IndicatorView Gallery";
On <iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Never);
var nItems = 10;
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = ExampleTemplates.CarouselTemplate();
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
BackgroundColor = Color.LightGray,
AutomationId = "TheCarouselView"
};
layout.Children.Add(carouselView);
var generator = new ItemsSourceGenerator(carouselView, nItems, ItemsSourceType.ObservableCollection);
layout.Children.Add(generator);
generator.GenerateItems();
var indicatorView = new IndicatorView
{
HorizontalOptions = LayoutOptions.Center,
Margin = new Thickness(12, 6, 12, 12),
IndicatorColor = Color.Gray,
SelectedIndicatorColor = Color.Black,
IndicatorsShape = IndicatorShape.Square,
AutomationId = "TheIndicatorView"
};
carouselView.IndicatorView = indicatorView;
layout.Children.Add(indicatorView);
var stckColors = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckColors.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "IndicatorColor"
});
var colors = new List <string>
{
"Black",
"Blue",
"Red"
};
var colorsPicker = new Picker
{
ItemsSource = colors,
WidthRequest = 150
};
colorsPicker.SelectedIndex = 0;
colorsPicker.SelectedIndexChanged += (s, e) =>
{
var selectedIndex = colorsPicker.SelectedIndex;
switch (selectedIndex)
{
case 0:
indicatorView.IndicatorColor = Color.Black;
break;
case 1:
indicatorView.IndicatorColor = Color.Blue;
break;
case 2:
indicatorView.IndicatorColor = Color.Red;
break;
}
};
stckColors.Children.Add(colorsPicker);
layout.Children.Add(stckColors);
var stckTemplate = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckTemplate.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "IndicatorTemplate"
});
var templates = new List <string>
{
"Circle",
"Square",
"Template"
};
var templatePicker = new Picker
{
ItemsSource = templates,
WidthRequest = 150,
TextColor = Color.Black
};
templatePicker.SelectedIndexChanged += (s, e) =>
{
var selectedIndex = templatePicker.SelectedIndex;
switch (selectedIndex)
{
case 0:
indicatorView.IndicatorTemplate = null;
indicatorView.IndicatorsShape = IndicatorShape.Circle;
break;
case 1:
indicatorView.IndicatorTemplate = null;
indicatorView.IndicatorsShape = IndicatorShape.Square;
break;
case 2:
indicatorView.IndicatorTemplate = ExampleTemplates.IndicatorTemplate();
break;
}
};
templatePicker.SelectedIndex = 0;
stckTemplate.Children.Add(templatePicker);
layout.Children.Add(stckTemplate);
var stckSize = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckSize.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "Indicator Size"
});
//indicatorView.IndicatorSize = 25;
var sizeSlider = new Slider
{
WidthRequest = 150,
Value = indicatorView.IndicatorSize,
Maximum = 50,
};
sizeSlider.ValueChanged += (s, e) =>
{
var indicatorSize = sizeSlider.Value;
indicatorView.IndicatorSize = indicatorSize;
};
stckSize.Children.Add(sizeSlider);
layout.Children.Add(stckSize);
Grid.SetRow(generator, 0);
Grid.SetRow(stckColors, 1);
Grid.SetRow(stckTemplate, 2);
Grid.SetRow(stckSize, 3);
Grid.SetRow(carouselView, 4);
Grid.SetRow(indicatorView, 5);
Content = layout;
}
public CarouselItemsGallery()
{
var viewModel = new CarouselItemsGalleryViewModel();
Title = $"CarouselView (Items)";
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
ItemsSource = viewModel.Items,
IsScrollAnimated = true,
IsBounceEnabled = true,
EmptyView = "This is the empty view"
};
layout.Children.Add(carouselView, 0, 0);
var stacklayoutButtons = new StackLayout
{
Orientation = StackOrientation.Horizontal
};
var addItemButton = new Button
{
Text = "Add Item"
};
addItemButton.Clicked += (sender, e) =>
{
viewModel.Items.Add(new CarouselData
{
Color = Color.Red,
Name = $"{viewModel.Items.Count + 1}"
});
carouselView.Position = viewModel.Items.Count - 1;
};
var removeItemButton = new Button
{
Text = "Remove Item"
};
removeItemButton.Clicked += (sender, e) =>
{
if (viewModel.Items.Any())
{
viewModel.Items.RemoveAt(viewModel.Items.Count - 1);
}
if (viewModel.Items.Count > 0)
{
carouselView.Position = viewModel.Items.Count - 1;
}
};
var clearItemsButton = new Button
{
Text = "Clear Items"
};
clearItemsButton.Clicked += (sender, e) =>
{
viewModel.Items.Clear();
};
stacklayoutButtons.Children.Add(addItemButton);
stacklayoutButtons.Children.Add(removeItemButton);
stacklayoutButtons.Children.Add(clearItemsButton);
layout.Children.Add(stacklayoutButtons, 0, 1);
Content = layout;
BindingContext = viewModel;
}
public static LinearItemsLayout ItemSpacing(this LinearItemsLayout layout, double spacing)
{
layout.ItemSpacing = spacing;
return(layout);
}
public static T ItemsLayout <T>(this T carouselview, LinearItemsLayout itemsLayout) where T : IRxCarouselView
{
carouselview.ItemsLayout = itemsLayout;
return(carouselview);
}
public CarouselCodeGallery(ItemsLayoutOrientation orientation)
{
On <iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Never);
_scrollInfoLabel.MaxLines = 1;
_scrollInfoLabel.LineBreakMode = LineBreakMode.TailTruncation;
_orientation = orientation;
Title = $"CarouselView (Code, {orientation})";
var nItems = 5;
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Star
}
}
};
var itemsLayout =
new LinearItemsLayout(orientation)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = ExampleTemplates.CarouselTemplate();
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
Position = 2,
Margin = new Thickness(0, 10, 0, 10),
BackgroundColor = Color.LightGray,
AutomationId = "TheCarouselView"
};
if (orientation == ItemsLayoutOrientation.Horizontal)
{
carouselView.PeekAreaInsets = new Thickness(30, 0, 30, 0);
}
else
{
carouselView.PeekAreaInsets = new Thickness(0, 30, 0, 30);
}
carouselView.Scrolled += CarouselView_Scrolled;
StackLayout stacklayoutInfo = GetReadOnlyInfo(carouselView);
var generator = new ItemsSourceGenerator(carouselView, initialItems: nItems, itemsSourceType: ItemsSourceType.ObservableCollection);
layout.Children.Add(generator);
var positionControl = new PositionControl(carouselView, nItems);
layout.Children.Add(positionControl);
var spacingModifier = new SpacingModifier(carouselView.ItemsLayout, "Update Spacing");
layout.Children.Add(spacingModifier);
layout.Children.Add(stacklayoutInfo);
var stckPeek = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckPeek.Children.Add(new Label {
Text = "Peek"
});
var padi = new Slider
{
Maximum = 100,
Minimum = 0,
Value = 30,
WidthRequest = 100,
BackgroundColor = Color.Pink
};
padi.ValueChanged += (s, e) => {
var peek = padi.Value;
if (orientation == ItemsLayoutOrientation.Horizontal)
{
carouselView.PeekAreaInsets = new Thickness(peek, 0, peek, 0);
}
else
{
carouselView.PeekAreaInsets = new Thickness(0, peek, 0, peek);
}
};
stckPeek.Children.Add(padi);
stacklayoutInfo.Children.Add(stckPeek);
stacklayoutInfo.Children.Add(_scrollInfoLabel);
var content = new Grid();
content.Children.Add(carouselView);
#if DEBUG
// Uncomment this line to add a helper to visualize the center of each element.
//content.Children.Add(CreateDebuggerLines());
#endif
layout.Children.Add(content);
Grid.SetRow(positionControl, 1);
Grid.SetRow(stacklayoutInfo, 2);
Grid.SetRow(spacingModifier, 3);
Grid.SetRow(content, 4);
Content = layout;
generator.CollectionChanged += (sender, e) => {
positionControl.UpdatePositionCount(generator.Count);
};
generator.GenerateItems();
}
public IndicatorCodeGallery()
{
Title = "IndicatorView Gallery";
On <iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Never);
var nItems = 10;
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center
};
var itemTemplate = ExampleTemplates.CarouselTemplate();
_carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
BackgroundColor = Colors.LightGray,
AutomationId = "TheCarouselView"
};
layout.Children.Add(_carouselView);
var generator = new ItemsSourceGenerator(_carouselView, nItems, ItemsSourceType.ObservableCollection);
layout.Children.Add(generator);
generator.GenerateItems();
_carouselView.PropertyChanged += CarouselViewPropertyChanged;
(_carouselView.ItemsSource as ObservableCollection <CollectionViewGalleryTestItem>).CollectionChanged += IndicatorCodeGalleryCollectionChanged;
var indicatorView = new IndicatorView
{
HorizontalOptions = LayoutOptions.Center,
Margin = new Thickness(12, 6, 12, 12),
IndicatorColor = Colors.Gray,
SelectedIndicatorColor = Colors.Black,
IndicatorsShape = IndicatorShape.Square,
AutomationId = "TheIndicatorView",
Count = 5,
};
_carouselView.IndicatorView = indicatorView;
layout.Children.Add(indicatorView);
var stckColors = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckColors.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "IndicatorColor"
});
var colors = new List <string>
{
"Black",
"Blue",
"Red"
};
var colorsPicker = new Picker
{
ItemsSource = colors,
WidthRequest = 150
};
colorsPicker.SelectedIndex = 0;
colorsPicker.SelectedIndexChanged += (s, e) =>
{
var selectedIndex = colorsPicker.SelectedIndex;
switch (selectedIndex)
{
case 0:
indicatorView.IndicatorColor = Colors.Black;
break;
case 1:
indicatorView.IndicatorColor = Colors.Blue;
break;
case 2:
indicatorView.IndicatorColor = Colors.Red;
break;
}
};
stckColors.Children.Add(colorsPicker);
layout.Children.Add(stckColors);
var stckTemplate = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckTemplate.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "IndicatorTemplate"
});
var templates = new List <string>
{
"Circle",
"Square",
"Template"
};
var templatePicker = new Picker
{
ItemsSource = templates,
WidthRequest = 150,
TextColor = Colors.Black
};
templatePicker.SelectedIndexChanged += (s, e) =>
{
var selectedIndex = templatePicker.SelectedIndex;
switch (selectedIndex)
{
case 0:
indicatorView.IndicatorTemplate = null;
indicatorView.IndicatorsShape = IndicatorShape.Circle;
break;
case 1:
indicatorView.IndicatorTemplate = null;
indicatorView.IndicatorsShape = IndicatorShape.Square;
break;
case 2:
indicatorView.IndicatorTemplate = ExampleTemplates.IndicatorTemplate();
break;
}
};
templatePicker.SelectedIndex = 0;
stckTemplate.Children.Add(templatePicker);
layout.Children.Add(stckTemplate);
var stckSize = new StackLayout {
Orientation = StackOrientation.Horizontal
};
stckSize.Children.Add(new Label {
VerticalOptions = LayoutOptions.Center, Text = "Indicator Size"
});
//indicatorView.IndicatorSize = 25;
var sizeSlider = new Slider
{
WidthRequest = 150,
Value = indicatorView.IndicatorSize,
Maximum = 50,
};
sizeSlider.ValueChanged += (s, e) =>
{
var indicatorSize = sizeSlider.Value;
indicatorView.IndicatorSize = indicatorSize;
};
stckSize.Children.Add(sizeSlider);
layout.Children.Add(stckSize);
Grid.SetRow(generator, 0);
Grid.SetRow(stckColors, 1);
Grid.SetRow(stckTemplate, 2);
Grid.SetRow(stckSize, 3);
Grid.SetRow(_carouselView, 4);
Grid.SetRow(indicatorView, 6);
var layoutBtn = new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Center,
};
var btnRemove = new Button
{
Text = "DEL First",
FontSize = 8,
AutomationId = "btnRemoveFirst",
BackgroundColor = Colors.LightGray,
Padding = new Thickness(5),
Command = new Command(() =>
{
var items = (_carouselView.ItemsSource as ObservableCollection <CollectionViewGalleryTestItem>);
items.Remove(items[0]);
})
};
_btnPrev = new Button
{
Text = "Prev",
FontSize = 8,
AutomationId = "btnPrev",
BackgroundColor = Colors.LightGray,
Padding = new Thickness(5),
Command = new Command(() =>
{
_carouselView.Position--;
}, () =>
{
return(_carouselView.Position > 0);
})
};
_btnNext = new Button
{
Text = "Next",
FontSize = 8,
AutomationId = "btnNext",
BackgroundColor = Colors.LightGray,
Padding = new Thickness(5),
Command = new Command(() =>
{
_carouselView.Position++;
}, () =>
{
var items = (_carouselView.ItemsSource as ObservableCollection <CollectionViewGalleryTestItem>);
return(_carouselView.Position < items.Count - 1);
})
};
var btnRemoveLast = new Button
{
Text = "DEL Last",
FontSize = 8,
AutomationId = "btnRemoveLast",
BackgroundColor = Colors.LightGray,
Padding = new Thickness(5),
Command = new Command(() =>
{
var items = (_carouselView.ItemsSource as ObservableCollection <CollectionViewGalleryTestItem>);
var indexToRemove = items.Count - 1;
items.Remove(items[indexToRemove]);
})
};
layoutBtn.Children.Add(btnRemove);
layoutBtn.Children.Add(_btnPrev);
layoutBtn.Children.Add(_btnNext);
layoutBtn.Children.Add(btnRemoveLast);
layout.Children.Add(layoutBtn);
Grid.SetRow(layoutBtn, 5);
Content = layout;
}
public CarouselSnapGallery()
{
On <iOS>().SetLargeTitleDisplay(LargeTitleDisplayMode.Never);
var viewModel = new CarouselItemsGalleryViewModel(false, false);
Title = $"CarouselView Snap Options";
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Star
}
}
};
var snapPointsStack = new StackLayout
{
Margin = new Thickness(12)
};
var snapPointsLabel = new Label {
FontSize = 10, Text = "SnapPointsType:"
};
var snapPointsTypes = Enum.GetNames(typeof(SnapPointsType)).Select(b => b).ToList();
var snapPointsTypePicker = new Picker
{
ItemsSource = snapPointsTypes,
SelectedItem = snapPointsTypes[1]
};
snapPointsStack.Children.Add(snapPointsLabel);
snapPointsStack.Children.Add(snapPointsTypePicker);
layout.Children.Add(snapPointsStack, 0, 0);
var snapPointsAlignmentsStack = new StackLayout
{
Margin = new Thickness(12)
};
var snapPointsAlignmentsLabel = new Label {
FontSize = 10, Text = "SnapPointsAlignment:"
};
var snapPointsAlignments = Enum.GetNames(typeof(SnapPointsAlignment)).Select(b => b).ToList();
var snapPointsAlignmentPicker = new Picker
{
ItemsSource = snapPointsAlignments,
SelectedItem = snapPointsAlignments[0]
};
snapPointsAlignmentsStack.Children.Add(snapPointsAlignmentsLabel);
snapPointsAlignmentsStack.Children.Add(snapPointsAlignmentPicker);
layout.Children.Add(snapPointsAlignmentsStack, 0, 1);
var itemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.Mandatory,
SnapPointsAlignment = SnapPointsAlignment.Start
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
ItemsSource = viewModel.Items,
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
BackgroundColor = Color.LightGray,
PeekAreaInsets = new Thickness(0, 0, 100, 0),
Margin = new Thickness(12),
AutomationId = "TheCarouselView"
};
layout.Children.Add(carouselView, 0, 2);
snapPointsTypePicker.SelectedIndexChanged += (sender, e) =>
{
if (carouselView.ItemsLayout is LinearItemsLayout linearItemsLayout)
{
Enum.TryParse(snapPointsTypePicker.SelectedItem.ToString(), out SnapPointsType snapPointsType);
linearItemsLayout.SnapPointsType = snapPointsType;
}
};
snapPointsAlignmentPicker.SelectedIndexChanged += (sender, e) =>
{
if (carouselView.ItemsLayout is LinearItemsLayout linearItemsLayout)
{
Enum.TryParse(snapPointsAlignmentPicker.SelectedItem.ToString(), out SnapPointsAlignment snapPointsAlignment);
linearItemsLayout.SnapPointsAlignment = snapPointsAlignment;
}
};
Content = layout;
BindingContext = viewModel;
}
public CarouselItemsGallery(bool startEmptyCollection = false, bool setCollectionWithAsync = false,
bool useNativeIndicators = false, bool setPositionOnConstructor = false,
bool setPositionOnAppearing = false, bool useScrollAnimated = true)
{
_viewModel = new CarouselItemsGalleryViewModel(startEmptyCollection, setCollectionWithAsync);
_setPositionOnAppering = setPositionOnAppearing;
if (setPositionOnConstructor)
{
_viewModel.CarouselPosition = 3;
}
Title = $"CarouselView (Indicators)";
var grid = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Star
},
new RowDefinition {
Height = GridLength.Auto
}
}
};
var itemsLayout =
new LinearItemsLayout(ItemsLayoutOrientation.Horizontal)
{
SnapPointsType = SnapPointsType.MandatorySingle,
SnapPointsAlignment = SnapPointsAlignment.Center,
ItemSpacing = 8
};
var itemTemplate = GetCarouselTemplate();
var carouselView = new CarouselView
{
ItemsLayout = itemsLayout,
ItemTemplate = itemTemplate,
IsScrollAnimated = useScrollAnimated,
IsBounceEnabled = true,
EmptyView = "This is the empty view",
PeekAreaInsets = new Thickness(50),
};
carouselView.SetBinding(CarouselView.ItemsSourceProperty, nameof(_viewModel.Items));
carouselView.SetBinding(CarouselView.PositionProperty, nameof(_viewModel.CarouselPosition));
var absolute = new AbsoluteLayout();
absolute.Children.Add(carouselView, new Rectangle(0, 0, 1, 1), AbsoluteLayoutFlags.All);
var indicators = new IndicatorView
{
Margin = new Thickness(15, 20),
IndicatorColor = Colors.Gray,
SelectedIndicatorColor = Colors.Black,
IndicatorsShape = IndicatorShape.Square
};
if (!useNativeIndicators)
{
indicators.IndicatorTemplate = new DataTemplate(() =>
{
return(new Image
{
Source = new FontImageSource
{
FontFamily = DefaultFontFamily(),
Glyph = "\uf30c",
},
});
});
}
carouselView.IndicatorView = indicators;
absolute.Children.Add(indicators, new Rectangle(.5, 1, -1, -1), AbsoluteLayoutFlags.PositionProportional);
grid.Children.Add(absolute, 0, 0);
var stacklayoutButtons = new StackLayout
{
Orientation = StackOrientation.Horizontal
};
var addItemButton = new Button
{
Text = "Add Item"
};
addItemButton.Clicked += (sender, e) =>
{
_viewModel.Items.Add(new CarouselData
{
Color = Colors.Red,
Name = $"{_viewModel.Items.Count + 1}"
});
_viewModel.CarouselPosition = _viewModel.Items.Count - 1;
};
var removeItemButton = new Button
{
Text = "Remove Item"
};
removeItemButton.Clicked += (sender, e) =>
{
if (_viewModel.Items.Any())
{
_viewModel.Items.RemoveAt(_viewModel.Items.Count - 1);
}
if (_viewModel.Items.Count > 0)
{
_viewModel.CarouselPosition = _viewModel.Items.Count - 1;
}
};
var clearItemsButton = new Button
{
Text = "Clear Items"
};
clearItemsButton.Clicked += (sender, e) =>
{
_viewModel.Items.Clear();
};
var lbl = new Label
{
AutomationId = "lblPosition"
};
lbl.SetBinding(Label.TextProperty, nameof(CarouselView.Position));
lbl.BindingContext = carouselView;
stacklayoutButtons.Children.Add(addItemButton);
stacklayoutButtons.Children.Add(removeItemButton);
stacklayoutButtons.Children.Add(clearItemsButton);
stacklayoutButtons.Children.Add(lbl);
grid.Children.Add(stacklayoutButtons, 0, 1);
Content = grid;
BindingContext = _viewModel;
}
public static CarouselView ItemsLayout(this CarouselView carousel, LinearItemsLayout layout)
{
carousel.ItemsLayout = layout;
return(carousel);
}
