Maui entry height to be relatively to text.

Haviv Elbsz 2,071 Reputation points
2023-07-25T14:03:08.1433333+00:00

Hello all. How to build an Entry that's scale itself according to its font size. Thank you very much.

.NET MAUI
.NET MAUI
A Microsoft open-source framework for building native device applications spanning mobile, tablet, and desktop.
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  1. Chathura Munasinghe 170 Reputation points
    2023-07-25T16:45:57.6+00:00

    To build an Entry in .NET MAUI that scales its height relative to the font size, you can use a combination of a custom ContentView and the OnSizeAllocated method. Here's a step-by-step guide on how to achieve this:

    Create a new .NET MAUI project or use an existing one.

    Add a new class for the custom Entry. Let's call it ScalingEntry. This class will inherit from ContentView.

    In the ScalingEntry class, define a private Entry field that will handle the text input.

    Override the OnSizeAllocated method in the ScalingEntry class. This method is called whenever the size of the ScalingEntry changes.

    In the OnSizeAllocated method, update the font size of the internal Entry based on the height of the ScalingEntry.

    Here's the code for the ScalingEntry class:

    using Microsoft.Maui.Controls;
    
    namespace YourNamespace
    {
        public class ScalingEntry : ContentView
        {
            private Entry entry;
    
            public ScalingEntry()
            {
                // Create the internal Entry
                entry = new Entry();
    
                // Bind the Text property to the internal Entry
                entry.SetBinding(Entry.TextProperty, new Binding(nameof(Text), source: this));
    
                // Add the internal Entry to the ContentView's content
                Content = entry;
            }
    
            public static readonly BindableProperty TextProperty =
                BindableProperty.Create(nameof(Text), typeof(string), typeof(ScalingEntry), default(string));
    
            public string Text
            {
                get => (string)GetValue(TextProperty);
                set => SetValue(TextProperty, value);
            }
    
            protected override void OnSizeAllocated(double width, double height)
            {
                base.OnSizeAllocated(width, height);
    
                // Calculate the desired font size based on the height of the ScalingEntry
                double fontSize = height * 0.6; // Adjust this multiplier as needed for your specific design
    
                // Set the font size of the internal Entry
                entry.FontSize = fontSize;
            }
        }
    }
    
    

    Now, you can use the ScalingEntry in your XAML code just like a regular Entry, and its height will adjust based on the font size:

    <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
                 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                 xmlns:local="clr-namespace:YourNamespace">
        <StackLayout>
            <!-- Use the ScalingEntry just like a regular Entry -->
            <local:ScalingEntry Text="This is a scaling Entry" />
        </StackLayout>
    </ContentPage>
    

    Adjust the 0.6 multiplier in the OnSizeAllocated method as needed to fine-tune the scaling based on your design preferences. This value will vary depending on the font and how much padding you want around the text.

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