Visualization to show only one result , No result when TEXTBOX FILTER is empty (reason not working)

[YJ]

Hi all,

This is more of a question of why and not how.

My primary intent is such that when using the TextBox filter on powerbi destop, it should not show all the info when the TEXTBOX is empty.

This is what i have tested:

As a means of testing i created 3 measures:

_HOV_Group = HASONEVALUE(ITEMGROUP[Group])
_TextSearch_Group = if(HASONEVALUE(ITEMGROUP[Group]),1,0)
SlicerCheck = if(calculate(distinctcount(ITEMGROUP[Group]),allselected(ITEMGROUP[Group]))=1,1,0)

https://drive.google.com/open?id=1amSM3wJiHRVBcOZjiC1Aga0K40ATVaN4 

 I saw on other threads and gotton the solution by using the 3rd measure, SlicerCheck and put it on the visualization filter (show items when the value iss 1) as show in the photo.
This solved my primary intented concern but i like to know why when using the _TextSearch_Group measure it does not work when logically and also through validations from the display Card values, these  2 measures return the same values consistently?? 
Regards
Skye

[v-chuncz-msft · Accepted solution]

@YJ 

By dragging [Group] and measures to a Table visual, you'll find the difference.