Hi,
I am running into an issue where on a touch screen device, when I am using finger to type in.
The very first click is not sending the Key to the input box, but when I click on that for the second time then it works fine. It happens only once, and then it works normally.

Hi,

I could not reproduce lost touch in keyboard's sample projects.

Verify there is a focused control at the time you hit a key for the first time. It could be the OS or WPF consuming the event to activate a child window and bring keyboard focus to first control in tab order, and then next hits send input to focused control as expected.

Also check if there aren't any Preview* event handlers in the WPF panel / window hierarchy setting first touch event as handled before it reaches the keyboard.

Regards,
Slavcho
Mindfusion

Hi,

Try setting <ScrollViewer  ... Focusable="False">

When that happens, try also typing from a physical keyboard to verify your expected control has the input focus.

Regards,
Slavcho
Mindfusion

Hi,

Could be some of the elements you mention has captured input events. Try printing AreAnyTouchesCaptured and IsMouseCaptured values for UIElements in your Xaml to verify that.

Regards,
Slavcho
Mindfusion

Hi,

Have you checked for captured mouse or touch input? That's very different from keyboard focus and most likely reason as we see it.

Regards,
Slavcho
Mindfusion