[UWP] Change Lottie Animation Color / Theme Dynamically

Md. Niaz Mahmud 131

I have used lottie json animation in xaml uwp using "CommunityToolkit.WinUI.Lottie" and "AnimatedVisualPlayer".

But for dark theme I can not see the lottie animation as the color is fixed. How can we dynamically change color of lottie animation?

<Page x:Class="Lottie_Test.MainPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:local="using:Lottie_Test"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
      xmlns:lottie="using:CommunityToolkit.WinUI.Lottie"
      mc:Ignorable="d"
      Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid Background="White">
        <Border Background="Transparent"
                BorderThickness="3"
                BorderBrush="Transparent"
                Width="30"
                Height="30"
                HorizontalAlignment="Center"
                VerticalAlignment="Center">
            <muxc:AnimatedVisualPlayer x:Name="VoiceWaveLottiePlayer"
                                       AutomationProperties.Name="Lottie animation"
                                       AutoPlay="True">
                <lottie:LottieVisualSource x:Name="LottieJsonSource"
                                           Options="All"
                                           UriSource="ms-appx:///Assets/lottie_equalizer.json" />
            </muxc:AnimatedVisualPlayer>
        </Border>
    </Grid>
</Page>

Castorix31 86,051

In WinUI 3, If I change the Background of the border, for example LightGray, on a random Lottie I got from Google , I get :

<Window
    x:Class="WinUI3_Lottie.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:WinUI3_Lottie"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:animatedvisuals="using:AnimatedVisuals"
    mc:Ignorable="d">

    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
        <Button x:Name="myButton" Click="myButton_Click">Click Me</Button>
        <!--Copied from WinUI3 Gallery-->
        <Border Width="400" Height="400"
                            BorderBrush="{ThemeResource ToolTipBorderThemeBrush}"
                            BorderThickness="5"
                            Background="LightGray"
                            Margin="0, 20, 0, 20">

            <!--  AnimatedVisualPlayer  -->
            <AnimatedVisualPlayer x:Name="Player" AutoPlay="False">

                <AnimatedVisualPlayer.Source>
                    <!--  Codegen-ed Lottie animation source: /AnimatedVisuals/LottieLogo1.cs -->
                    <animatedvisuals:_130153_santa_telegram_sticker/>
                </AnimatedVisualPlayer.Source>

                <!-- Fallback since Lottie-Windows is only supported on OS version 17763 and above -->
                <AnimatedVisualPlayer.FallbackContent>
                    <DataTemplate>
                        <Image Source="/Assets/130153-santa-telegram-sticker.gif"/>
                    </DataTemplate>
                </AnimatedVisualPlayer.FallbackContent>
            </AnimatedVisualPlayer>
        </Border>
    </StackPanel>
</Window>

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Roy Li - MSFT 33,471 Reputation points Microsoft Vendor

2024-10-10T02:36:30.0233333+00:00

Any updates about this issue?
Md. Niaz Mahmud 131 Reputation points

2024-10-18T08:56:23.7366667+00:00

@Roy Li - MSFT Thank you for your response. And Sorry for the late reply.

I was actually talking about is there any way to change stroke color of Lottie animation programmatically so that in Theme Change we can change color of the Animation.

For example, Check this free lottie animation from google, Animation - 1729241422791.txt (please change the extension to .json for using as Lottie).

This animation stroke is black by color. If we use it on Dark Theme with a Black Background it can not be seen, is there any way to change color programmatically? Or We need to make another lottie file and change the resource dynamically?
Md. Niaz Mahmud 131 Reputation points

2024-10-18T09:05:20.4933333+00:00

Actually, we are thinking what if we can change the stroke color of lottie animation dynamically.

Animation - 1729241422791.txt (convert extension to .json for lottie file). For example, this simple lottie animation from google has only black strokes. Is there any way change its color dynamically?

Check Lottie Viewer (https://www.microsoft.com/store/productId/9P7X9K692TMW?ocid=pdpshare) it can change color dynamically
Roy Li - MSFT 33,471 Reputation points Microsoft Vendor

2024-10-18T09:14:59.0766667+00:00

is there any way to change color programmatically? Or We need to make another lottie file and change the resource dynamically?

There is no way to change the content of the lottie file in code after going through the community toolkit document. I think you will need to use different lottie files instead.
Md. Niaz Mahmud 131 Reputation points

2024-10-21T05:11:36.04+00:00
Hello, @Roy Li - MSFT Thank you for your response. I have tried this in MainPage.xaml.cs, on Theme Change event handler,

public async void SetVoiceWaveAnimationPath(ApplicationTheme theme) { if (theme == ApplicationTheme.Dark) { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/lottie_voice_equalizer_dark.json"); } else { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/lottie_voice_equalizer_light.json"); } }

But, when the Animation is running, and I change Theme from windows system settings, The animation source is not changed, rather, it remains the same as before.

But, if the animation UI is not loaded (x:Load = false) and Theme is changed, then this code block works. Is there any issue that, animation player does not change to new Uri source while running? Could you please help regarding this?
Md. Niaz Mahmud 131 Reputation points

2024-10-21T05:21:37.7366667+00:00
Hello, @Roy Li - MSFT Thank you for your response. I have tried below code for run time Theme/High Contrast change for Lottie animation in Theme Change event handler.

public void SetVoiceWaveAnimationPath(ApplicationTheme theme) { if (theme == ApplicationTheme.Dark) { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/lottie_voice_equalizer_dark.json"); } else { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/lottie_voice_equalizer_light.json"); } }

But when animation is running, and theme is changed from windows system settings, then animation source is not changed.

But, when animation UI is reloaded then animation source is changed. Is there any issue regarding run time animation source change for lottie animation? Could you please help regarding this?

Junjie Zhu - MSFT 19,316 Microsoft Vendor

Hi @Md. Niaz Mahmud ,

I use theme listner to dynamically switch json files, and the UI changes with the theme.

using Microsoft.Toolkit.Uwp.UI.Helpers;

 public MainPage()
 {
     this.InitializeComponent();
     var Listener = new ThemeListener();
     Listener.ThemeChanged += Listener_ThemeChanged; 
 }
 private void Listener_ThemeChanged(ThemeListener sender)
 {
     var theme = sender.CurrentTheme;
     if (theme == ApplicationTheme.Dark)
     {
         LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/LightBulb.json");
     }
     else
     {
         LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/LottieLogo1.json");
     }
 }

Md. Niaz Mahmud 131 Reputation points

2024-10-22T05:40:19.7133333+00:00

Thanks, this is working now.

Accepted answer

Junjie Zhu - MSFT 19,316 Reputation points Microsoft Vendor

2024-10-22T07:33:46.6166667+00:00
Hi @Md. Niaz Mahmud ,

Let me summarize this issue

It is recommended to use Theme Listner to dynamically switch json files, then the UI will change with the theme.

using Microsoft.Toolkit.Uwp.UI.Helpers; public MainPage() { this.InitializeComponent(); var Listener = new ThemeListener(); Listener.ThemeChanged += Listener_ThemeChanged; } private void Listener_ThemeChanged(ThemeListener sender) { var theme = sender.CurrentTheme; if (theme == ApplicationTheme.Dark) { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/LightBulb.json"); } else { LottieJsonSource.UriSource = new System.Uri("ms-appx:///Assets/LottieLogo1.json"); } }

Thank you.

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