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spiegelpspiegelp
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basic implementation of a Snackbar
1 parent 688c764 commit 789185d

13 files changed

+687
-168
lines changed

‎MainDemo.Wpf/MainWindow.xaml

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‎MainDemo.Wpf/MaterialDesignDemo.csproj

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<Compile Include="Sliders.xaml.cs">
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<DependentUpon>Sliders.xaml</DependentUpon>
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</Compile>
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<Compile Include="Snackbar.xaml.cs">
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<DependentUpon>Snackbar.xaml</DependentUpon>
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</Compile>
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<Compile Include="TextFields.xaml.cs">
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<DependentUpon>TextFields.xaml</DependentUpon>
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</Compile>
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="Snackbar.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="TextFields.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>

‎MainDemo.Wpf/Snackbar.xaml

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<UserControl x:Class="MaterialDesignColors.WpfExample.Snackbar"
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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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:local="clr-namespace:MaterialDesignDemo"
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mc:Ignorable="d"
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d:DesignHeight="300" d:DesignWidth="600" Background="Transparent">
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<Grid>
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<ScrollViewer HorizontalAlignment="Stretch" HorizontalScrollBarVisibility="Auto" VerticalAlignment="Stretch" VerticalScrollBarVisibility="Auto">
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<Grid>
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<Grid.ColumnDefinitions>
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<ColumnDefinition Width="250" />
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<ColumnDefinition Width="250" />
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</Grid.ColumnDefinitions>
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<Grid.RowDefinitions>
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<RowDefinition Height="auto" />
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<RowDefinition Height="16" />
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<RowDefinition Height="auto" />
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</Grid.RowDefinitions>
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<TextBlock Margin="8,0" Text="Click the button to show a simple Snackbar." TextWrapping="WrapWithOverflow" />
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<Button Grid.Row="2" Content="SHOW" Width="80" Click="ShowSimpleSnackbarButtonClickHandler" />
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<TextBlock Grid.Column="1" Margin="8,0" Text="This button shows a Snackbar with an action. The action will show another Snackbar after a short delay." TextWrapping="WrapWithOverflow" />
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<Button Grid.Column="1" Grid.Row="2" Content="SHOW" Width="80" Click="ShowSnackbarButtonClickHandler" />
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</Grid>
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</ScrollViewer>
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</Grid>
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</UserControl>

‎MainDemo.Wpf/Snackbar.xaml.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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using MaterialDesignThemes.Wpf;
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namespace MaterialDesignColors.WpfExample
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{
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public partial class Snackbar : UserControl
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{
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public Snackbar()
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{
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InitializeComponent();
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}
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private async void ShowSimpleSnackbarButtonClickHandler(object sender, RoutedEventArgs args)
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{
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await SnackbarHost.ShowAsync("RootSnackbarHost", "This is a simple Snackbar.");
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}
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private async void ShowSnackbarButtonClickHandler(object sender, RoutedEventArgs args)
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{
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await SnackbarHost.ShowAsync("RootSnackbarHost", "Hello from the Snackbar!", new SnackbarAction("GOT IT", async (object s, RoutedEventArgs a) => {
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await Task.Delay(2000);
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await SnackbarHost.ShowAsync("RootSnackbarHost", "A second hello from the Snackbar!", new SnackbarAction("BYE"));
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}));
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}
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}
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}

‎MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj

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<Generator>MSBuild:Compile</Generator>
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<SubType>Designer</SubType>
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</Page>
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<Page Include="Themes\MaterialDesignTheme.Snackbar.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Card.cs" />
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<Compile Include="IconType.cs" />
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<Compile Include="ListBoxAssist.cs" />
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<Compile Include="Palette.cs" />
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<Compile Include="Snackbar.cs" />
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<Compile Include="SnackbarAction.cs" />
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<Compile Include="SnackbarActionEventHandler.cs" />
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<Compile Include="SnackbarHost.cs" />
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<Compile Include="Transitions\CircleWipe.cs" />
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<Compile Include="IHintProxy.cs" />
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<Compile Include="Transitions\IndexedItemOffsetMultiplierExtension.cs" />

‎MaterialDesignThemes.Wpf/Snackbar.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Media;
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using System.Windows.Threading;
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namespace MaterialDesignThemes.Wpf
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{
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[TemplateVisualState(GroupName = VisibilityStatesGroupName, Name = HiddenStateName)]
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[TemplateVisualState(GroupName = VisibilityStatesGroupName, Name = VisibleStateName)]
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public class Snackbar : Control
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{
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public const string PartActionButtonName = "PART_actionButton";
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public const string VisibilityStatesGroupName = "VisibilityStates";
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public const string HiddenStateName = "Hidden";
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public const string VisibleStateName = "Visible";
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public static readonly DependencyProperty ActionLabelProperty = DependencyProperty.Register(nameof(ActionLabel), typeof(object), typeof(Snackbar), new PropertyMetadata(null));
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public object ActionLabel
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{
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get
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{
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return GetValue(ActionLabelProperty);
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}
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set
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{
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SetValue(ActionLabelProperty, value);
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}
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}
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public static readonly DependencyProperty MessageProperty = DependencyProperty.Register(nameof(Message), typeof(object), typeof(Snackbar), new PropertyMetadata(null));
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public object Message
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{
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get
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{
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return GetValue(MessageProperty);
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}
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set
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{
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SetValue(MessageProperty, value);
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}
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}
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public SnackbarActionEventHandler ActionHandler { get; internal set; }
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private DispatcherTimer _timer;
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static Snackbar()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(Snackbar), new FrameworkPropertyMetadata(typeof(Snackbar)));
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}
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public Snackbar() { }
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public override void OnApplyTemplate()
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{
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Button actionButton = (Button)GetTemplateChild(PartActionButtonName);
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actionButton.Click += ActionButtonClickHandler;
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VisualStateManager.GoToState(this, HiddenStateName, false);
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base.OnApplyTemplate();
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}
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public async Task Show()
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{
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// trigger animation and wait for it
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VisualStateManager.GoToState(this, VisibleStateName, true);
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await Task.Delay(300);
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// start timer which will hide the Snackbar
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_timer = new DispatcherTimer();
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_timer.Tick += async (object sender, EventArgs args) =>
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{
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await Hide();
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};
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_timer.Interval = new TimeSpan(0, 0, 0, 3, 0);
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_timer.Start();
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}
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public async Task Hide()
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{
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// stop the timer
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_timer.Stop();
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// trigger animation and wait for it
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VisualStateManager.GoToState(this, HiddenStateName, true);
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await Task.Delay(300);
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// finally remove the Snackbar from the UI
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FindSnackbarHost()?.RemoveSnackbar(this);
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}
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private async void ActionButtonClickHandler(object sender, RoutedEventArgs args)
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{
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await Hide();
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// call the optional action handler
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ActionHandler?.Invoke(this, new RoutedEventArgs(args.RoutedEvent, this));
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}
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private SnackbarHost FindSnackbarHost()
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{
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DependencyObject parent = VisualTreeHelper.GetParent(this);
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while (parent != null)
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{
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if (parent is SnackbarHost)
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{
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return (SnackbarHost)parent;
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}
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parent = VisualTreeHelper.GetParent(parent);
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}
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return null;
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}
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}
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}

‎MaterialDesignThemes.Wpf/SnackbarAction.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace MaterialDesignThemes.Wpf
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{
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public class SnackbarAction
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{
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private string _actionLabel;
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private SnackbarActionEventHandler _actionHandler;
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public SnackbarActionEventHandler ActionHandler
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{
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get
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{
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return _actionHandler;
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}
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}
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public string ActionLabel
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{
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get
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{
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return _actionLabel;
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}
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}
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public SnackbarAction(string actionLabel) : this(actionLabel, null) { }
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public SnackbarAction(string actionLabel, SnackbarActionEventHandler actionHandler)
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{
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_actionLabel = actionLabel;
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_actionHandler = actionHandler;
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}
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}
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}

‎MaterialDesignThemes.Wpf/SnackbarActionEventHandler.cs

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using System.Windows;
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namespace MaterialDesignThemes.Wpf
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{
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public delegate void SnackbarActionEventHandler(object sender, RoutedEventArgs args);
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}

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