Comment 10 for bug 855532

On 11/23/2011 02:23 PM, Mark Shuttleworth wrote:
> Are we showing the Launcher in every monitor? Do we have a clear idea of
> a primary monitor, or a monitor-with-focus?

Primary monitor is an interesting problem. We inside unity have an idea
of a primary monitor which is not directly tied to whatever X considers
the primary monitor. This allows us to easily move it to, for example,
follow the mouse, or window focus.

As we will be showing a launcher on every monitor, primary monitor needs
to be more cleanly defined. Currently I have been working off the idea
that primary monitor will more or less follow the mouse. This matches
the behavior that was shown in the multi-monitor demo (dash open on the
monitor the BFB was clicked on, or the monitor the mouse was on when you
press the super key). Alt-tab also observes this same primary follows
mouse behavior.