Question

Is there a way in silverlight to detect when a lost focus event is triggered if this
happens because the tab key is pressed or the user presses a mouse button on another control.

This is what i want to achieve:

I have a RadGridView with 1 row. In the last column i have a numeric input, when
an user tabs out of this control, a new row should be added to the sourcecollection in the viewmodel, this automaticly adds a new row to the grid, then the first column on this row should have focus and the dropdownlist in the celledittemplate should be opened.

When i use the lost focus event adding the new row works fine, though this also works when i don’t use tab to unfocus the control. Also, the first column on the new row is not selected, it somehow
gives focus to row 0 column 0.

Answer 1

Ok, inspired by the answer Dipak gave I came up with a slightly different solution,
I handled the Gridviews keydown and keyup events, keydown sets a bool to true, keyup to false.

the execution sequence fortunately is keydown, lostfocus, keyup
so in the lost focus event I only need to check wether the bool is true;
strangely enough the keyup event is not always triggered, but since the lostfocus is
I set the bool to false there also.