-
Notifications
You must be signed in to change notification settings - Fork 1.4k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #4320 from XAML-Knight/dev/ViewportLogging
Add Property panel for ViewportBehavior
- Loading branch information
Showing
3 changed files
with
109 additions
and
81 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
106 changes: 106 additions & 0 deletions
106
Microsoft.Toolkit.Uwp.UI.Behaviors/Viewport/ViewportBehavior.Properties.cs
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // 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. | ||
|
|
||
| using System; | ||
| using Microsoft.Xaml.Interactivity; | ||
| using Windows.UI.Xaml; | ||
|
|
||
| namespace Microsoft.Toolkit.Uwp.UI.Behaviors | ||
| { | ||
| /// <summary> | ||
| /// A class for listening to an element enter or exit the ScrollViewer viewport | ||
| /// </summary> | ||
| public partial class ViewportBehavior | ||
| { | ||
| /// <summary> | ||
| /// The IsFullyInViewport value of the associated element | ||
| /// </summary> | ||
| public static readonly DependencyProperty IsFullyInViewportProperty = | ||
| DependencyProperty.Register(nameof(IsFullyInViewport), typeof(bool), typeof(ViewportBehavior), new PropertyMetadata(default(bool), OnIsFullyInViewportChanged)); | ||
|
|
||
| /// <summary> | ||
| /// The IsInViewport value of the associated element | ||
| /// </summary> | ||
| public static readonly DependencyProperty IsInViewportProperty = | ||
| DependencyProperty.Register(nameof(IsInViewport), typeof(bool), typeof(ViewportBehavior), new PropertyMetadata(default(bool), OnIsInViewportChanged)); | ||
|
|
||
| /// <summary> | ||
| /// The IsAlwaysOn value of the associated element | ||
| /// </summary> | ||
| public static readonly DependencyProperty IsAlwaysOnProperty = | ||
| DependencyProperty.Register(nameof(IsAlwaysOn), typeof(bool), typeof(ViewportBehavior), new PropertyMetadata(default(bool))); | ||
|
|
||
| /// <summary> | ||
| /// Gets or sets a value indicating whether this behavior will remain attached after the associated element enters the viewport. When false, the behavior will remove itself after entering. | ||
| /// </summary> | ||
| public bool IsAlwaysOn | ||
| { | ||
| get { return (bool)GetValue(IsAlwaysOnProperty); } | ||
| set { SetValue(IsAlwaysOnProperty, value); } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Gets a value indicating whether associated element is fully in the ScrollViewer viewport | ||
| /// </summary> | ||
| public bool IsFullyInViewport | ||
| { | ||
| get { return (bool)GetValue(IsFullyInViewportProperty); } | ||
| private set { SetValue(IsFullyInViewportProperty, value); } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Gets a value indicating whether associated element is in the ScrollViewer viewport | ||
| /// </summary> | ||
| public bool IsInViewport | ||
| { | ||
| get { return (bool)GetValue(IsInViewportProperty); } | ||
| private set { SetValue(IsInViewportProperty, value); } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Event tracking when the object is fully within the viewport or not | ||
| /// </summary> | ||
| /// <param name="d">DependencyObject</param> | ||
| /// <param name="e">EventArgs</param> | ||
| private static void OnIsFullyInViewportChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) | ||
| { | ||
| var obj = (ViewportBehavior)d; | ||
| var value = (bool)e.NewValue; | ||
|
|
||
| if (value) | ||
| { | ||
| obj.EnteredViewport?.Invoke(obj.AssociatedObject, EventArgs.Empty); | ||
|
|
||
| if (!obj.IsAlwaysOn) | ||
| { | ||
| Interaction.GetBehaviors(obj.AssociatedObject).Remove(obj); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| obj.ExitingViewport?.Invoke(obj.AssociatedObject, EventArgs.Empty); | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Event tracking the state of the object as it moves into and out of the viewport | ||
| /// </summary> | ||
| /// <param name="d">DependencyObject</param> | ||
| /// <param name="e">EventArgs</param> | ||
| private static void OnIsInViewportChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) | ||
| { | ||
| var obj = (ViewportBehavior)d; | ||
| var value = (bool)e.NewValue; | ||
|
|
||
| if (value) | ||
| { | ||
| obj.EnteringViewport?.Invoke(obj.AssociatedObject, EventArgs.Empty); | ||
| } | ||
| else | ||
| { | ||
| obj.ExitedViewport?.Invoke(obj.AssociatedObject, EventArgs.Empty); | ||
| } | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters