Add project files.
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Daniel Clark
@@ -0,0 +1,194 @@
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using System;
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using System.Windows;
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using System.Windows.Controls;
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namespace TheXamlGuy.UI.WPF.Controls;
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public class FlipView : ListBox
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{
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public static readonly DependencyProperty ItemContainerTemplateSelectorProperty =
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DependencyProperty.Register(nameof(ItemContainerTemplateSelector),
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typeof(DataTemplateSelector), typeof(FlipView), new PropertyMetadata(new DefaultItemContainerTemplateSelector()));
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public static readonly DependencyProperty UsesItemContainerTemplateSelectorProperty =
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DependencyProperty.Register(nameof(UsesItemContainerTemplateSelector),
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typeof(bool), typeof(FlipView));
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private object? current;
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private AnimatedScrollViewer? scrollViewer;
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public FlipView()
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{
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DefaultStyleKey = typeof(FlipView);
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}
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public DataTemplateSelector ItemContainerTemplateSelector
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{
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get => (DataTemplateSelector)GetValue(ItemContainerTemplateSelectorProperty);
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set => SetValue(ItemContainerTemplateSelectorProperty, value);
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}
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public bool UsesItemContainerTemplateSelector
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{
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get => (bool)GetValue(UsesItemContainerTemplateSelectorProperty);
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set => SetValue(UsesItemContainerTemplateSelectorProperty, value);
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}
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public void Next()
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{
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if (SelectedIndex < Items.Count - 1)
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{
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SelectedIndex++;
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}
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else
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{
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SelectedIndex = 0;
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}
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if (scrollViewer is not null)
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{
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double scrollOffset = Math.Min(scrollViewer.CurrentHorizontalOffset + GetDesiredItemWidth(), scrollViewer.ScrollableWidth);
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scrollViewer.ScrollToHorizontalOffsetWithAnimation(scrollOffset);
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}
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}
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public override void OnApplyTemplate()
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{
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scrollViewer = GetTemplateChild("ScrollingHost") as AnimatedScrollViewer;
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if (scrollViewer is not null)
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{
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scrollViewer.SizeChanged += OnScrollViewerSizeChanged;
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}
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base.OnApplyTemplate();
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}
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public void Previous()
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{
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if (SelectedIndex > 0)
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{
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SelectedIndex--;
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}
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else
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{
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SelectedIndex = Items.Count - 1;
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}
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if (scrollViewer is not null)
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{
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double scrollOffset = Math.Min(scrollViewer.CurrentHorizontalOffset - GetDesiredItemWidth(), scrollViewer.ScrollableWidth);
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scrollViewer.ScrollToHorizontalOffsetWithAnimation(scrollOffset);
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}
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}
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protected override DependencyObject GetContainerForItemOverride()
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{
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object? current = this.current;
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this.current = null;
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if (current is not null)
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{
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FlipViewItem? item = null;
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if (UsesItemContainerTemplateSelector)
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{
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if (ItemContainerTemplateSelector.SelectTemplate(current, this) is DataTemplate dataTemplate)
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{
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DependencyObject container = dataTemplate.LoadContent();
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switch (container)
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{
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case FlipViewItem:
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item = container as FlipViewItem;
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break;
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case TemplateGeneratorControl template:
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item = template.Content is FlipViewItem ? template.Content as FlipViewItem : new FlipViewItem { Content = template.Content };
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break;
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}
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}
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item ??= new FlipViewItem();
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return item;
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}
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}
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return new FlipViewItem();
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}
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protected override bool IsItemItsOwnContainerOverride(object item)
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{
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if (item is not FlipViewItem)
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{
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current = item;
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return false;
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}
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return true;
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}
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protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
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{
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base.PrepareContainerForItemOverride(element, item);
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if (element is FlipViewItem flipViewItem)
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{
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Thickness flipViewItemMargin = flipViewItem.Margin;
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double value = GetDesiredItemWidth();
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value -= (flipViewItemMargin.Left + flipViewItemMargin.Right);
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flipViewItem.Width = value;
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value = GetDesiredItemHeight();
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value -= (flipViewItemMargin.Top + flipViewItemMargin.Bottom);
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flipViewItem.Height = value;
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}
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}
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private double GetDesiredItemHeight()
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{
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double height = scrollViewer is not null ? scrollViewer.ActualHeight : ActualHeight;
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if (height <= 0)
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{
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height = Height;
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}
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return height;
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}
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private double GetDesiredItemWidth()
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{
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double width = scrollViewer is not null ? scrollViewer.ActualWidth : ActualWidth;
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if (width <= 0)
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{
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width = Width;
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}
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return width;
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}
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private void OnScrollViewerSizeChanged(object sender, SizeChangedEventArgs args)
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{
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double width = GetDesiredItemWidth();
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double height = GetDesiredItemHeight();
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for (int i = 0; i < Items.Count; i++)
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{
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if (ItemContainerGenerator.ContainerFromIndex(i) is FlipViewItem container)
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{
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Thickness margin = container.Margin;
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double value = width - (margin.Left + margin.Right);
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container.Width = value;
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value = height - (margin.Top + margin.Bottom);
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container.Height = value;
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ScrollIntoView(SelectedItem);
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}
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}
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}
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}
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@@ -0,0 +1,41 @@
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<ResourceDictionary
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:controls="clr-namespace:TheXamlGuy.UI.WPF.Controls">
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<Style TargetType="controls:FlipView">
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<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
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<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
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<Setter Property="ItemsPanel">
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<Setter.Value>
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<ItemsPanelTemplate>
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<VirtualizingStackPanel Orientation="Horizontal" />
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</ItemsPanelTemplate>
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</Setter.Value>
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</Setter>
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="controls:FlipView">
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<controls:AnimatedScrollViewer
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x:Name="ScrollingHost"
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Padding="{TemplateBinding Padding}"
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HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
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IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
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IsInertiaEnabled="True"
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IsTabStop="False"
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VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
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<ItemsPresenter />
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</controls:AnimatedScrollViewer>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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<Style TargetType="controls:FlipViewItem">
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="controls:FlipViewItem">
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<ContentPresenter Margin="{TemplateBinding Padding}" />
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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</ResourceDictionary>
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@@ -0,0 +1,11 @@
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using System.Windows.Controls;
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namespace TheXamlGuy.UI.WPF.Controls;
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public class FlipViewItem : ContentControl
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{
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public FlipViewItem()
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{
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DefaultStyleKey = typeof(FlipViewItem);
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}
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}
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