.NET MAUI Label Handler / Renderer for attributed text

Question

.NET MAUI Label Handler / Renderer for attributed text

Malcolm Jack 6

Having some issues with handlers / renderers for labels in MAUI

See github project for reference: https://github.com/InquisitorJax/MAUI-Controls

1) Handler - setting any properties in the handler doesn't get applied
For this scenario, I'm setting TextFormatted in the Android Handler (and I've tried other properties as well)
They don't get applied

Since the handler wasn't working, I thought I'd try a renderer
2) Renderer
When setting TextFormatted in the renderer - I can see the text on the UI, but the problem with the Renderer is that the Markdown property change never fires on the renderer.

What am I missing?

Note: to switch between handler and renderer, just comment out the code in MauiProgram

Anonymous

I cloned you demo; I use handler to set TextFormatted, highlighted text is working, but other effects are not working. I change the namespace to namespace Wibci as well for TextUtil and HtmlTagHandler

   public MainPage()  
       {  
           InitializeComponent();  
        
           Microsoft.Maui.Handlers.LabelHandler.Mapper.AppendToMapping("MyCustomization", (handler, view) =>  
           {  
   #if ANDROID  
                
                handler.PlatformView.TextFormatted = TextUtil.GetFormattedHtml(MarkdownSampleText);  
   #endif  
           });  
       }

What behavior do you expect, and how is that different from the actual behavior?

Malcolm Jack 6 Reputation points

2022-12-23T10:26:49.883+00:00

I set the TextFormatted on line 25 of MarkdownTextView.Android.cs:
but it results in blank textview (where the red circle is highlighted) for both iOS and Android

I'm not sure I can make sense of your code - you're passing markdown text into GetFormattedHtml which is expecting html formatted text as an input.

Could you submit a PR or fork the repo with your changes so I can see what you're doing?

Your answer

Anonymous

2022-12-19T09:22:11.127+00:00

I cloned you demo; I use handler to set TextFormatted, highlighted text is working, but other effects are not working. I change the namespace to namespace Wibci as well for TextUtil and HtmlTagHandler

public MainPage() { InitializeComponent(); Microsoft.Maui.Handlers.LabelHandler.Mapper.AppendToMapping("MyCustomization", (handler, view) => { #if ANDROID handler.PlatformView.TextFormatted = TextUtil.GetFormattedHtml(MarkdownSampleText); #endif }); }

What behavior do you expect, and how is that different from the actual behavior?
Malcolm Jack 6 Reputation points

2022-12-23T10:26:49.883+00:00

I set the TextFormatted on line 25 of MarkdownTextView.Android.cs:
but it results in blank textview (where the red circle is highlighted) for both iOS and Android

I'm not sure I can make sense of your code - you're passing markdown text into GetFormattedHtml which is expecting html formatted text as an input.

Could you submit a PR or fork the repo with your changes so I can see what you're doing?

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.NET MAUI Label Handler / Renderer for attributed text

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