User-Agent:       Opera/9.80 (X11; Linux i686; U; en-GB) Presto/2.10.229 Version/11.62
Build Identifier: 

I notice this feature (whice I like) in Gmail and love you have it in my favorite File manager [Dolphin].

In Gmail , when the viewed options in the Header\ToolBar are depend on what you select .

To explain that , here is the default look of gmail :
http://store1.up-00.com/Mar12/exU99132.png

now if you select a mail from your index , you will see more option became available to you i.e delete , replay ...
http://store1.up-00.com/Mar12/45K99132.png

now let's add this feature to dolphin , we have pretty enough space in the toolbar 
http://store1.up-00.com/Mar12/gss00055.png
which we could use it to provide most used option when when a file is selected (similar to the options appear when I select a mail from my index ).

for example : if the user select several songs in music folder Options like ( Paly all , copy to , move to , delete ) will apper in the toolBar

and the options will hide when the user deSeclect those songs .

Awesome Feature isn't ?!



Reproducible: Didn't try



Expected Results:  
Enhance the usablity.