Widder2023/MauiGestures

Supported Platforms

iOS, Android, Windows, Mac

Maui Gesture Effects

Add "advanced" gestures to Maui. Available on all views. Most gesture commands include the event position.

    <Label Text="Click here" IsEnabled="True" ui:Gesture.TapCommand="{Binding OpenLinkCommand}" />

Or in code:

    var label = new Label();
    Gesture.SetTapCommand(label, new Command(() => { /*your code*/ }));

Quick start

Add the above nuget package to your Maui project
then add this line to your maui app builder:

using MauiGestures;
...
builder.AddAdvancedGestures();

The views on which the gesture is applied should have the property IsEnabled="True" and InputTransparent="False" which activates user interaction on them.

Examples

Add Gesture.TapCommand on any supported xaml view:

        <StackLayout ui:Gesture.TapCommand="{Binding OpenLinkCommand}">
            <Label Text="1.Tap this to open an url"  />
        </StackLayout>

Declare the corresponding namespace:

    <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             ...
             xmlns:ui="clr-namespace:MauiGestures;assembly=MauiGestures"
    >

And in the viewmodel:

 public Command OpenLinkCommand => new Command(() =>
 {
     //do something
 });

Supported Gestures

• TapCommand (ICommand)
• DoubleTapCommand (ICommand)
• PanCommand (ICommand)
• LongPressCommand (ICommand)
• TapPointCommand (ICommand or Command<Point>) where point is the absolute tap position relative to the view
• DoubleTapPoinCommand (ICommand or Command<Point>) where point is the absolute double tap position relative to the view
• PanPointCommand (ICommand or Command<PanEventArgs>) where point is the absolute position relative to the view
• LongPressPointCommand (ICommand or Command<Point>) where point is the absolute tap position relative to the view
• SwipeLeftCommand
• SwipeRightCommand
• SwipeTopCommand
• SwipeBottomCommand
• PinchCommand (Command<PinchEventArgs>) where PinchEventArg contains StartingPoints, CurrentPoints, Center, Scale, RotationRadians, RotationDegrees, Status

Properties:

• IsPanImmediate Set to true to receive the PanCommand or PanPointCommand event on touch down, instead of after a minimum move distance. Default to false.

Examples

Somme commands in XAML

<StackLayout ui:Gesture.TapCommand="{Binding OpenCommand}" IsEnabled="True">
    <Label Text="1.Tap this text to open an url" />
</StackLayout>

<StackLayout ui:Gesture.DoubleTapPointCommand="{Binding OpenPointCommand}" IsEnabled="True">
    <Label Text="2.Double tap this text to open an url" />
</StackLayout>

<BoxView
    ui:Gesture.PanPointCommand="{Binding PanPointCommand}"
    HeightRequest="200" WidthRequest="300"
    InputTransparent="False"
    IsEnabled="True"
     />

In the viewmodel:

public ICommand OpenCommand => new Command(async () =>
{
   //...
});

public ICommand OpenPointCommand => new Command<Point>(point =>
{
    PanX = point.X;
    PanY = point.Y;
    //...
});

public ICommand PanPointCommand => new Command<PanEventArgs>(args =>
{
    var point = args.Point;
    PanX = point.X;
    PanY = point.Y;
    //...
});

Exemple on a Grid containing an horizontal slider (set value on tap)

//Tap anywhere to set value
Gesture.SetTapPointCommand(this, new Command<Point>(pt =>
{
    var delta = (pt.X - Padding.Left) / (Width - Padding.Left - Padding.Right);
    if(delta<0 || delta>1)
        return;
    Value = (int)Math.Round((Maximum - Minimum) * delta);
}));

Limitations

Only commands are supported (PR welcome for events). No .NET events. So you must use the MVVM pattern.

Swipe commands are not supported on Windows because of a curious bug (event not received). If you find it, notify me! PinchCommand is not supported (yet) on Windows. PR welcome.

If your command is not receiving events, make sure that:

• you used the correct handler. Ie: the LongPressPointCommand should be new Command<Point>(pt => ...)
• you set IsEnabled="True" and InputTransparent="False" on the element

Windows requires the fall creator update.