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bug#24579: [PATCH] borderless windows on OS X

From: Clément Pit--Claudel
Subject: bug#24579: [PATCH] borderless windows on OS X
Date: Sun, 2 Oct 2016 12:50:55 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0

On 2016-10-02 12:39, martin rudalics wrote:
>>> We do: Emacs' native tooltip frames with a ‘border-width’ of zero should
>>> accomplish precisely that.
>> I meant the feature to create an arbitrary frame without a border, from 
>> ELisp.  We don't have this, AFAICT.
> What is an arbitrary frame?  A frame without the window manager's title
> bar can't be dragged with the mouse.  A frame without an external border
> can't be resized with the mouse.

Doesn't that depend on the window manager? For example, I can press Meta while 
dragging a frame to move it on my distro.
By arbitrary frame, I meant the kind of frame that you can create with 
make-frame (as opposed to a tooltip frame).  IIUC, the main difference is 
whether you can create multiple of them at the same time.

>>> The recipes there don't work: The ‘border-width’ parameter is usually
>>> ignored by the window manager for "normal" frames and replaced by the
>>> standard border.  You have to create a CWOverrideRedirect window - a
>>> frame that is _not_ handled by the window manager.
>> Right.  Do we have a way to do this from ELisp?
> Add a (border-width . 0) entry to `tooltip-frame-parameters' and show a
> native Emacs tooltip.

Can we show multiple of these at once? I thought we were limited to having a 
single one shown at any time, unlike regular frames.


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