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Merge pull request #4160 from ArchieCoder/feature/KeyDownTriggerBehavior
New behavior KeyDownTriggerBehavior
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....Toolkit.Uwp.SampleApp/SamplePages/KeyDownTriggerBehavior/KeyDownTriggerBehaviorXaml.bind
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| @@ -0,0 +1,59 @@ | ||
| <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" | ||
| xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" | ||
| xmlns:ani="using:Microsoft.Toolkit.Uwp.UI.Animations" | ||
| xmlns:behaviors="using:Microsoft.Toolkit.Uwp.UI.Behaviors" | ||
| xmlns:d="http://schemas.microsoft.com/expression/blend/2008" | ||
| xmlns:interactivity="using:Microsoft.Xaml.Interactivity" | ||
| xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" | ||
| mc:Ignorable="d"> | ||
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| <StackPanel | ||
| VerticalAlignment="Center"> | ||
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| <TextBox | ||
| PlaceholderText="Set the focus to this TextBox and press enter to trigger the animation" | ||
| Width="500"> | ||
| <interactivity:Interaction.Behaviors> | ||
| <behaviors:KeyDownTriggerBehavior | ||
| Key="Enter"> | ||
| <behaviors:StartAnimationAction Animation="{Binding ElementName=MoveAnimation}" /> | ||
| </behaviors:KeyDownTriggerBehavior> | ||
| </interactivity:Interaction.Behaviors> | ||
| </TextBox> | ||
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| <Button Background="Gray" Margin="0,40,0,0" Width="200" Height="200" HorizontalAlignment="Center" VerticalAlignment="Center"> | ||
| <ani:Explicit.Animations> | ||
| <ani:AnimationSet x:Name="MoveAnimation" IsSequential="True"> | ||
| <ani:TranslationAnimation Duration="0:0:3" To="0,32,0" From="0,0,0" /> | ||
| <ani:StartAnimationActivity Delay="0:0:3" Animation="{Binding ElementName=FadeOutAnimation}"/> | ||
| <ani:StartAnimationActivity Delay="0:0:3" Animation="{Binding ElementName=FadeInAnimation}"/> | ||
| <ani:TranslationAnimation Duration="0:0:1" To="0,0,0" From="0,32,0" /> | ||
| </ani:AnimationSet> | ||
| </ani:Explicit.Animations> | ||
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| <Image Source="ms-appx:///Assets/ToolkitLogo.png" Height="100" Width="100"> | ||
| <ani:Explicit.Animations> | ||
| <ani:AnimationSet x:Name="FadeOutAnimation"> | ||
| <ani:OpacityAnimation From="1" | ||
| To="0" | ||
| Duration="0:0:1" | ||
| Delay="0" | ||
| EasingType="Linear" | ||
| EasingMode="EaseOut"/> | ||
| </ani:AnimationSet> | ||
| <ani:AnimationSet x:Name="FadeInAnimation"> | ||
| <ani:OpacityAnimation From="0" | ||
| To="1" | ||
| Duration="0:0:1" | ||
| Delay="0" | ||
| EasingType="Linear" | ||
| EasingMode="EaseOut"/> | ||
| </ani:AnimationSet> | ||
| </ani:Explicit.Animations> | ||
| </Image> | ||
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| </Button> | ||
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| </StackPanel> | ||
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| </Page> |
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62 changes: 62 additions & 0 deletions
62
Microsoft.Toolkit.Uwp.UI.Behaviors/Keyboard/KeyDownTriggerBehavior.cs
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| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for more information. | ||
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| using Microsoft.Xaml.Interactivity; | ||
| using Windows.System; | ||
| using Windows.UI.Xaml; | ||
| using Windows.UI.Xaml.Input; | ||
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| namespace Microsoft.Toolkit.Uwp.UI.Behaviors | ||
| { | ||
| /// <summary> | ||
| /// This behavior listens to a key down event on the associated <see cref="UIElement"/> when it is loaded and executes an action. | ||
| /// </summary> | ||
| [TypeConstraint(typeof(FrameworkElement))] | ||
| public class KeyDownTriggerBehavior : Trigger<FrameworkElement> | ||
| { | ||
| /// <summary> | ||
| /// Identifies the <see cref="Key"/> property. | ||
| /// </summary> | ||
| public static readonly DependencyProperty KeyProperty = DependencyProperty.Register( | ||
| nameof(Key), | ||
| typeof(VirtualKey), | ||
| typeof(KeyDownTriggerBehavior), | ||
| new PropertyMetadata(null)); | ||
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| /// <summary> | ||
| /// Gets or sets the key to listen when the associated object is loaded. | ||
| /// </summary> | ||
| public VirtualKey Key | ||
| { | ||
| get => (VirtualKey)GetValue(KeyProperty); | ||
| set => SetValue(KeyProperty, value); | ||
| } | ||
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| /// <inheritdoc/> | ||
| protected override void OnAttached() | ||
| { | ||
| ((FrameworkElement)AssociatedObject).KeyDown += OnAssociatedObjectKeyDown; | ||
| } | ||
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| /// <inheritdoc/> | ||
| protected override void OnDetaching() | ||
| { | ||
| ((FrameworkElement)AssociatedObject).KeyDown -= OnAssociatedObjectKeyDown; | ||
| } | ||
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| /// <summary> | ||
| /// Invokes the current actions when the <see cref="Key"/> is pressed. | ||
| /// </summary> | ||
| /// <param name="sender">The source <see cref="UIElement"/> instance.</param> | ||
| /// <param name="keyRoutedEventArgs">The arguments for the event (unused).</param> | ||
| private void OnAssociatedObjectKeyDown(object sender, KeyRoutedEventArgs keyRoutedEventArgs) | ||
| { | ||
| if (keyRoutedEventArgs.Key == Key) | ||
| { | ||
| keyRoutedEventArgs.Handled = true; | ||
| Interaction.ExecuteActions(sender, Actions, keyRoutedEventArgs); | ||
| } | ||
| } | ||
| } | ||
| } |