[kde-guidelines] Possible guidelines for buttons with menus

[Heiko Tietze]

Am Freitag, 2. August 2013, 16:08:11 schrieb Aurélien Gâteau:
> What should we suggest to developers using this feature? 

I don't like menu buttons at all. It actually combines a dropdown control with 
an "execute" button. The combination has the advantage of a comprehensive 
layout, perhaps a nice design, and it makes a little sense to hide the 
dropdown if most items are used very rarely (which should rather be reflected 
in the workflow or other controls/layout). 
But then it has the (in my opinion more relevant) drawback that the 
interaction and available features are not apparent to the user. One has to 
click the button to discover the provided options - which interferes with the 
actual execution. And users cannot be sure whether or not the selection of an 
item does execute the function or if it just selects the item. It's getitng 
worse with delayed interaction. What happens on premature drop down click? 
E.g. the menu does open after 2s but I did wait for 1s only. There is no clue 
for the user to know how this particular control works.