XFHACKS-008 Label with Border and Background!

Ever wanted to have a Xamarin.Forms.Label, with a Border, or even better with a Background, or with a Corner Radius customization? Welcome to another lightening short post of me hacking around Xamarin.Forms elements!

By default Xamarin.Forms.Label doesn’t have a Border, Background neither a Corner Radius property, the only possible way to achieve that is by resorting to custom renderers. So I thought of making use of my own crazy imagination and hack my way around to get this to work right from Xamarin.Forms itself!

No custom renderers, no platform specific code and no third party libraries! Just by using pure out of the box Xamarin.Forms! 😉

Sneak Peak!

That’s what we gonna be build yol!

A Label with a Border and a Background, none other than with Corner Radius customization, a true dream come true for Xamarin.Forms developers! lol kidding! 😉

XFHACKS Recipe!

Buckle up fellas, its recipe time! 😉 Now this hack basically has mostly to do with my previous post, XFHACKS-007 Frame with a Border Width! If you would like to read more on detail about it then please check that article and come back here, but let me explain it in short form here though. Basically we’re placing a Frame element inside another Frame element with a Margin value which will create visually a single frame with a Border as our choice of the Margin.

Now for our Label, we’re going to place it inside that custom Frame we just built, giving it a nicely rendered border around it. You have the complete control over the Border Width property as explained in my previous article.

And the best part of it is that this Frame will resize itself according to the Label inside of it, since we’re not restricting it to any static values, whatever the Height or Width property you set to the Label, the border will follow it. Talking of Alignment of the Label you can freely use the Margin, HorizontalOptions and VerticalOptions to easily align the Label inside the Border. 😉

Code!

Behold the golden XAML code!

<!--  Label with a Border  -->
<Frame
    Padding="0"
    BackgroundColor="#2196F3"
    CornerRadius="7"
    HasShadow="False">
    <Frame
        Margin="2"
        Padding="5"
        BackgroundColor="White"
        CornerRadius="5"
        HasShadow="False">
        <Label
            BackgroundColor="Transparent"
            HorizontalOptions="Center"
            Text="Border with curved corners"
            TextColor="Black" />
    </Frame>
</Frame>

 

There you have the Label with a Border in XAML! Just like I explained above the two Frames rendering the Border around it. Feel free to change the Margin value of the child Frame element to increase or decrease the Border-Width. And both Frames CornerRadius are used to give a curved corners effect to the Border. Let’s see it in actions:

If you want to have curved sides for the Label Border, then simply increase the CornerRadius=”16″ parent Frame and CornerRadius=”14″ for the child Frame.

Now Imagine if you want to Align the Label inside the Border, then simply use the HorizontalOptions property as you wish, for example HorizontalOptions=”Start” and just to avoid the Label crashing with the border use the Margin property of the Label in whichever the direction you’re aligning your Label to, as an example Margin=”5,0,0,0″

How about that Background I promised earlier, well then simply set the child Frame’s background Color as you wish, and if you prefer to have a different Color for Border and Background, just make sure to set different colors to parent Frame’s Background color and child Frame’s background color.

Now how about having a Background Image, what you need to do is simply add an Image behind the Label using a Grid Layout by laying down both the elements on top of each other.

<!--  Label with a Background  -->
<Frame
    Padding="0"
    BackgroundColor="#2196F3"
    CornerRadius="7"
    HasShadow="False">
    <Frame
        Margin="2"
        Padding="0"
        BackgroundColor="White"
        CornerRadius="5"
        IsClippedToBounds="True"
        HasShadow="False">
        <Grid HeightRequest="30" IsClippedToBounds="True">
            <Image Aspect="AspectFill" Source="{extensions:ImageResource XFHacks.Resources.abstractbackground.jpg}" />
            <Label
                BackgroundColor="Transparent"
                FontAttributes="Bold"
                HorizontalOptions="Center"
                Text="With a Cool Background!"
                TextColor="White"
                VerticalOptions="Center" />
        </Grid>
    </Frame>
</Frame>

 

There you have it, the golden XAML! So what we have done here is basically the same concept but with a bit more icing on top, by removing the padding inside the child Frame allowing the Image background to stretch to on to the edge of the border. Then inside the child Frame we have a Grid Layout, and its got a HeightRequest property which determines the Height of the Label, meanwhile cropping out using IsClippedToBounds property, the excessive rendering of the Image inside that’s acting as the Background.

Now let’s put it together and fire it up! 😉

Fire it up!

Load your cannons, fire it up!

 

There you go! 😀 Running side by side Android, iOS and UWP.

A little Trick! 😉

Just like how I’ve implemented the Border and Background for the Label element, you could follow the same pattern and use this for any UI Element in Xamarin.Forms as you wish, such as Image, Editor, Slider, ListView, etc whichever you wish! 😉 Just replace that Label with the UI element of your choice! 😀

Grab it on Github!

https://github.com/UdaraAlwis/XFHacks

Well then, that’s it for now. More awesome stuff on the way!

Cheers! 😀 share the love!

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