I need to make a type of page that has a footer with a button which simply closes (pops) the current page. I have implemented the footer in one page already, which looks like this:

<ContentPage ...>
  <Grid RowDefinitions="*,Auto">
    <ScrollView Grid.Row="0">
    ...
    </ScrollView>
    <Button Grid.Row="1" Style="{StaticResource ButtonConfirm}" Margin="8,4" Text="Close" Clicked="ButtonExit_Clicked"/>
  </Grid>
</ContentPage>

However, I do not think that manually implementing that on each page would be the wisest course of action since, if I have to change anything in the footer, I’ll have to do so in every single page that has such footer, therefore I need a solution that allows me to create it once and then reuse it. After some research, I’ve figured that using an application-wide ControlTemplate would be the way to go. However, there are a few additional things that are required:

1. I must be able to hide the footer in some pages when I’m loading the content. Once loading is complete, I hide the loading VerticalStackLayout and then I’ll show the page itself with the footer and its content;

As an example, I’ll show what I currently do with said page:

<ContentPage ...>
  <StackLayout>
    <VerticalStackLayout x:Name="LayoutLoading" VerticalOptions="CenterAndExpand">
      <Label Text="Loading data. Please wait."/>
    </VerticalStackLayout>
    
    <VerticalStackLayout x:Name="LayoutMain" IsVisible="False">
      <!--This is there the content with the footer would be-->
    </VerticalStackLayout>
  </StackLayout>
</ContentPage>

PS.: I do not know if that’s the most appropriate way to implement a “loading” UI so I’m open to any suggestions in that regard as well.

2. I must be able to customize the button’s OnClicked event and the Style and Text properties. Note that they still should have their original values if not overridden.

Even though I know you can set the ControlTemplate‘s data through TemplateBinding, that will not allow me to set a default value to these properties, will it? If so, how can I do that?

Therefore, as of now, I’m at a loss as to how I could implement all of this through a ControlTemplate. If possible, how can I do all of this?

Thanks in advance!