conditional drill through with measure

Hi

Please I have two questions on conditional drill through with measure.

1. I am trying to add a to a switch statement to check if a measure has been clicked on so that i can specify the drillthrough page

I created a button to assist with this and  I have created a dax script to check if a column is chosen and direct to a certain page, but I am also trying to add a  check to see if a specific measure on the stack bar is clicked (made up of measure) then a specific page should be chosen for the drill through.

My dax script

Drill Navigation =

SWITCH(
TRUE,
HASONEFILTER(Sales[Vehicle]),“page1dt”,
HASONEFILTER(‘Sales’[Colour]),“page2dt”,

“”
)

2. My second question is when I drill through on the matrix it returns all the row on the month line, even though I have added the measure to the drill through page

This is a sample data