58 lines
1.7 KiB
C#
58 lines
1.7 KiB
C#
using System;
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using System.ComponentModel;
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using Bit.App.Controls;
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using Bit.iOS.Core.Renderers;
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using Bit.iOS.Core.Utilities;
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using UIKit;
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using Xamarin.Forms;
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using Xamarin.Forms.Platform.iOS;
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[assembly: ExportRenderer(typeof(Label), typeof(CustomLabelRenderer))]
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namespace Bit.iOS.Core.Renderers
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{
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public class CustomLabelRenderer : LabelRenderer
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{
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protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
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{
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base.OnElementChanged(e);
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if (Control != null && e.NewElement is Label)
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{
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UpdateFont();
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}
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}
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protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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base.OnElementPropertyChanged(sender, e);
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if (e.PropertyName == Label.FontProperty.PropertyName ||
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e.PropertyName == Label.TextProperty.PropertyName ||
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e.PropertyName == Label.FormattedTextProperty.PropertyName)
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{
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UpdateFont();
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}
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}
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private void UpdateFont()
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{
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if (Element is null || Control is null)
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return;
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var pointSize = iOSHelpers.GetAccessibleFont<Label>(Element.FontSize);
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if (pointSize != null)
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{
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Control.Font = UIFont.FromDescriptor(Element.ToUIFont().FontDescriptor, pointSize.Value);
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}
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// TODO: For now, I'm only doing this for IconLabel with setup just in case I break the whole app labels.
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// We need to revisit this when we address Accessibility Large Font issues across the app
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// to check if we can left it more generic like
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// else if (Element.FontFamily != null)
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else if (Element is IconLabel iconLabel && iconLabel.ShouldUpdateFontSizeDynamicallyForAccesibility)
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{
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var customFont = Element.ToUIFont();
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Control.Font = new UIFontMetrics(UIFontTextStyle.Body.GetConstant()).GetScaledFont(customFont);
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}
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}
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}
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}
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