Why the button "Tree Hierarchy" in Folder Diff of Perforce disabled?

I have a problem when using Perforce.

I'm using P4V, but don't know the Perforce Server version.

There are often some files in our project that don't need 开发者_如何学Goto be version-controlled. And I found a way to exclude folders or files from Perforce by editing the Workspace View.

Using "-//depot/. //Perforce/..." or "-//depot/*.dll //Perforce/*.dll" I could exclude all files or folders in a path. Then the Folder Diff will mark them with "Excluded Folder". The world is clean.

BUT! there are a lot of projects, and each of them has the same folders that we don't need like "bin" "obj", and with WebStorm there are ".idea"s, and with ReSharper there are a lot of folders starts with "_ReSharper", very disgusting.

With the articles here and here, the wildcards (...\*) seem to be put in the middle of path, like "//Perforce/.../bin/...", to let Folder Diff exclude every descendant folder names "bin".

But there is the problem. When I use "Diff Against.." Then the Folder Diff view shows up. All the files are not shown in tree view but in list view. The button "Show files in a tree hierarchy" up there is disabled. And the most important thing is that excluded folders /files in workspace view are lying down there.

When I delete the descendant folder path, it turns normal with tree view and marked "exclude folders"

I have no idea about that. Could anyone tell me what happened there?