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Implement PointerGestureRecognizer (#9592)
* Initial PointerGestureRecognizer code * Update PointerGestureRecognizer.cs * Clean up code and add nullability * Fix bad merge * Remove test code * Add sample to GestureGallery * Copy and refactor GetPosition logic used in TapGesture * Clean up code and use GetPosition * Update control gallery sample * Add public API file changes * Clean up code * Clean up more code Co-authored-by: Shane Neuville <shneuvil@microsoft.com>
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src/Controls/samples/Controls.Sample/Pages/Core/PointerGestureGalleryPage.xaml
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|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <views:BasePage | ||
| xmlns="http://schemas.microsoft.com/dotnet/2021/maui" | ||
| xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" | ||
| x:Class="Maui.Controls.Sample.Pages.PointerGestureGalleryPage" | ||
| xmlns:views="clr-namespace:Maui.Controls.Sample.Pages.Base"> | ||
| <StackLayout> | ||
| <Label | ||
| x:Name="hoverLabel" | ||
| FontSize="24" | ||
| Text="Hover me!"> | ||
| <Label.GestureRecognizers> | ||
| <PointerGestureRecognizer PointerEntered="HoverBegan" PointerExited="HoverEnded" PointerMoved="HoverMoved" /> | ||
| </Label.GestureRecognizers> | ||
| </Label> | ||
| <Label x:Name="positionLabel" Text="Hover above label to reveal pointer position"/> | ||
| </StackLayout> | ||
| </views:BasePage> |
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src/Controls/samples/Controls.Sample/Pages/Core/PointerGestureGalleryPage.xaml.cs
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|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| using Microsoft.Maui.Controls; | ||
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| namespace Maui.Controls.Sample.Pages | ||
| { | ||
| public partial class PointerGestureGalleryPage | ||
| { | ||
| public PointerGestureGalleryPage() | ||
| { | ||
| InitializeComponent(); | ||
| } | ||
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| void HoverBegan(object sender, PointerEventArgs e) | ||
| { | ||
| hoverLabel.Text = "Thanks for hovering me!"; | ||
| } | ||
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| void HoverEnded(object sender, PointerEventArgs e) | ||
| { | ||
| hoverLabel.Text = "Hover me again!"; | ||
| positionLabel.Text = "Hover above label to reveal pointer position again"; | ||
| } | ||
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| void HoverMoved(object sender, PointerEventArgs e) | ||
| { | ||
| positionLabel.Text = $"Pointer position is at: {e.GetPosition((View)sender)}"; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| #nullable enable | ||
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| using Microsoft.Maui.Graphics; | ||
| using System; | ||
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| namespace Microsoft.Maui.Controls | ||
| { | ||
| /// <summary> | ||
| /// Arguments for PointerGestureRecognizer events. | ||
| /// </summary> | ||
| public class PointerEventArgs : EventArgs | ||
| { | ||
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| Func<IElement?, Point?>? _getPosition; | ||
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| public PointerEventArgs() | ||
| { | ||
| } | ||
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| internal PointerEventArgs(Func<IElement?, Point?>? getPosition) | ||
| { | ||
| _getPosition = getPosition; | ||
| } | ||
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| public virtual Point? GetPosition(Element? relativeTo) => | ||
| _getPosition?.Invoke(relativeTo); | ||
| } | ||
| } |
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| @@ -0,0 +1,97 @@ | ||
| #nullable enable | ||
| using System; | ||
| using Microsoft.Maui.Graphics; | ||
| using System.Windows.Input; | ||
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| namespace Microsoft.Maui.Controls | ||
| { | ||
| /// <summary> | ||
| /// Provides pointer gesture recognition and events. | ||
| /// </summary> | ||
| public sealed class PointerGestureRecognizer : GestureRecognizer | ||
| { | ||
| public static readonly BindableProperty PointerEnteredCommandProperty = BindableProperty.Create(nameof(PointerEnteredCommand), typeof(ICommand), typeof(PointerGestureRecognizer), null); | ||
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| public static readonly BindableProperty PointerEnteredCommandParameterProperty = BindableProperty.Create(nameof(PointerEnteredCommandParameter), typeof(object), typeof(PointerGestureRecognizer), null); | ||
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| public static readonly BindableProperty PointerExitedCommandProperty = BindableProperty.Create(nameof(PointerExitedCommand), typeof(ICommand), typeof(PointerGestureRecognizer), null); | ||
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| public static readonly BindableProperty PointerExitedCommandParameterProperty = BindableProperty.Create(nameof(PointerExitedCommandParameter), typeof(object), typeof(PointerGestureRecognizer), null); | ||
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| public static readonly BindableProperty PointerMovedCommandProperty = BindableProperty.Create(nameof(PointerMovedCommand), typeof(ICommand), typeof(PointerGestureRecognizer), null); | ||
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| public static readonly BindableProperty PointerMovedCommandParameterProperty = BindableProperty.Create(nameof(PointerMovedCommandParameter), typeof(object), typeof(PointerGestureRecognizer), null); | ||
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| public PointerGestureRecognizer() | ||
| { | ||
| } | ||
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| public event EventHandler<PointerEventArgs>? PointerEntered; | ||
| public event EventHandler<PointerEventArgs>? PointerExited; | ||
| public event EventHandler<PointerEventArgs>? PointerMoved; | ||
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| public ICommand PointerEnteredCommand | ||
| { | ||
| get { return (ICommand)GetValue(PointerEnteredCommandProperty); } | ||
| set { SetValue(PointerEnteredCommandProperty, value); } | ||
| } | ||
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| public ICommand PointerEnteredCommandParameter | ||
| { | ||
| get { return (ICommand)GetValue(PointerEnteredCommandParameterProperty); } | ||
| set { SetValue(PointerEnteredCommandParameterProperty, value); } | ||
| } | ||
| public ICommand PointerExitedCommand | ||
| { | ||
| get { return (ICommand)GetValue(PointerExitedCommandProperty); } | ||
| set { SetValue(PointerExitedCommandProperty, value); } | ||
| } | ||
| public ICommand PointerExitedCommandParameter | ||
| { | ||
| get { return (ICommand)GetValue(PointerExitedCommandParameterProperty); } | ||
| set { SetValue(PointerExitedCommandParameterProperty, value); } | ||
| } | ||
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| public ICommand PointerMovedCommand | ||
| { | ||
| get { return (ICommand)GetValue(PointerMovedCommandProperty); } | ||
| set { SetValue(PointerMovedCommandProperty, value); } | ||
| } | ||
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| public ICommand PointerMovedCommandParameter | ||
| { | ||
| get { return (ICommand)GetValue(PointerMovedCommandParameterProperty); } | ||
| set { SetValue(PointerMovedCommandParameterProperty, value); } | ||
| } | ||
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| internal void SendPointerEntered(View sender, Func<IElement?, Point?>? getPosition) | ||
| { | ||
| ICommand cmd = PointerEnteredCommand; | ||
| if (cmd?.CanExecute(PointerEnteredCommandParameter) == true) | ||
| cmd.Execute(PointerEnteredCommandParameter); | ||
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| EventHandler<PointerEventArgs>? handler = PointerEntered; | ||
| handler?.Invoke(sender, new PointerEventArgs(getPosition)); | ||
| } | ||
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| internal void SendPointerExited(View sender, Func<IElement?, Point?>? getPosition) | ||
| { | ||
| ICommand cmd = PointerExitedCommand; | ||
| if (cmd?.CanExecute(PointerExitedCommandParameter) == true) | ||
| cmd.Execute(PointerExitedCommandParameter); | ||
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| EventHandler<PointerEventArgs>? handler = PointerExited; | ||
| handler?.Invoke(sender, new PointerEventArgs(getPosition)); | ||
| } | ||
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| internal void SendPointerMoved(View sender, Func<IElement?, Point?>? getPosition) | ||
| { | ||
| ICommand cmd = PointerMovedCommand; | ||
| if (cmd?.CanExecute(PointerMovedCommandParameter) == true) | ||
| cmd.Execute(PointerMovedCommandParameter); | ||
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| EventHandler<PointerEventArgs>? handler = PointerMoved; | ||
| handler?.Invoke(sender, new PointerEventArgs(getPosition)); | ||
| } | ||
| } | ||
| } |
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