Painting on UWP app

Question

Hi,

We are building a UWP app which needs the user to write on top of the content of our app using touch. For e.g it is similar to some teaching app on a big screen, and while teaching he wants to mark on some content etc..

The features related to painting is exactly similar to the Scenario3 here https://github.com/microsoft/Windows-universal-samples/tree/master/Samples/SimpleInk/cs

But the only difference is here it writes on InkCanvas. In our case we need to write on top of out content. It can contain different content. So is it possible to put a transparent InkCanvas on top of our other content, so user will see our content, but can paint on the InkCanvas?

If that is not possible can you please tell me what are the other options we have to implement such feature.

Here is a example of what we want to do

Thank You.

Answer 1

So is it possible to put a transparent InkCanvas on top of our other content, so user will see our content, but can paint on the InkCanvas?

Hello,

Sure, you could place InkCanvas on top of your content. But it will disable the lower control input behavior. So, I mean, you need add a method to make InkCanvas Collapsed when you want to touch the lower control.

myInkCanvas.Visibility = Visibility.Collapsed

In general, we often make a specific place to set InkCanvas , and it will not cover the other element.