Initially, the Datagrid is populated with a list of song titles. The scrolling field containing the Datagrid is too small to show all of the titles.
Initially, the Datagrid is populated with a list of song titles. The scrolling field containing the Datagrid is too small to show all of the titles.
A script is used to recognize a keypress. ScrollLineIntoView is set to the number of the line corresponding to the first occurence of a title that starts with the corresponding letter (ScrollLineIntoView 235, for example).
This is what happens when the M-key is pressed. As you can see, scrolling occurs in such a way as to place the first title beginning with that letter at the bottom of the field.
The same sort of behaviour is observed when the S-key is then pressed: scrolling occurs in such a way as to place the first title beginning with that letter at the bottom of the field.
However, pressing the M-key again provides a more correct result, with the first title beginning with that letter now appearing at the top of the scrolling field.
This same correct behaviour is repeated when the letter "g" is pressed. It seems that, when scrolling towards the top of the list, the ScrollLineIntoView has a different effect to when moving to the bottom of the list! Just to prove it, let's press the M-key againÉ
And indeed, scrolling down towards the bottom of the list (from the G titles to the M titles) results in the first M title being displayed as the last line of the DataGrid window.