Created
September 15, 2017 15:05
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| using Lottie.Forms; | |
| using Xamarin.Forms; | |
| namespace Shping.Controls.Lottie | |
| { | |
| public class LottieAnimationView : AnimationView | |
| { | |
| public static readonly BindableProperty AssetFolderProperty = BindableProperty.Create(nameof(AssetFolder), typeof(string), typeof(LottieAnimationView)); | |
| public string AssetFolder | |
| { | |
| get { return (string)GetValue(AssetFolderProperty); } | |
| set { SetValue(AssetFolderProperty, value); } | |
| } | |
| public static readonly BindableProperty SourceHeightProperty = BindableProperty.Create(nameof(SourceHeight), typeof(double), typeof(LottieAnimationView), 0d); | |
| public double SourceHeight | |
| { | |
| get { return (double)GetValue(SourceHeightProperty); } | |
| set { SetValue(SourceHeightProperty, value); } | |
| } | |
| public static readonly BindableProperty SourceWidthProperty = BindableProperty.Create(nameof(SourceWidth), typeof(double), typeof(LottieAnimationView), 0d); | |
| public double SourceWidth | |
| { | |
| get { return (double)GetValue(SourceWidthProperty); } | |
| set { SetValue(SourceWidthProperty, value); } | |
| } | |
| protected override void OnPropertyChanged(string propertyName = null) | |
| { | |
| base.OnPropertyChanged(propertyName); | |
| switch (propertyName) | |
| { | |
| case nameof(SourceWidth): | |
| case nameof(SourceHeight): | |
| InvalidateMeasure(); | |
| break; | |
| } | |
| } | |
| protected override SizeRequest OnMeasure(double widthConstraint, double heightConstraint) | |
| { | |
| if (SourceWidth > 0 && SourceHeight > 0) | |
| { | |
| double widht, height; | |
| var aspect = SourceWidth/SourceHeight; | |
| //var height = widthConstraint/aspect; | |
| if (widthConstraint > heightConstraint) | |
| { | |
| height = heightConstraint; | |
| widht = heightConstraint*aspect; | |
| } | |
| else | |
| { | |
| height = widthConstraint / aspect; | |
| widht = widthConstraint; | |
| } | |
| var size = new Size(widht, height); | |
| return new SizeRequest(size, size); | |
| } | |
| return base.OnMeasure(widthConstraint, heightConstraint); | |
| } | |
| } | |
| } |
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