timing of KDE5 panel in login

[Takao Fujiwara]

Thank you for forwarding the e-mail.

I try to get the desktop size from _NET_WORKAREA and _NET_CURRENT_DESKTOP.

After KDE panel runs, the height of root window != the height of _NET_WORKAREA because KDE5 panel is allocated.
I wish to move my panel to (the width of root window, the height of _NET_WORKAREA)
But When I try to get the the height of _NET_WORKAREA during the login, the height of root window == the height of _NET_WORKAREA because KDE5 panel is 
not allocated yet. So the position of my panel and one of the KDE panel is duplicated.

This is the expected result.

+------- plasma-desktop 5 -----+
|                              |
|                 +-----------+|
|                 | my panel  ||
|                 +-----------+|
|+----------------------------+|
||  KDE5 panel                ||
|+----------------------------+|
+------------------------------+

But actual result at login time is duplicated because KDE5 panel is not allocated:

+----------------+-----------+
|  KDE5 panel    | My panel  |
+----------------+-----------+

After KDE5 panel runs, my panel gets the right position because the height of _NET_WORKAREA returns the right value.

I'm finding how to listen the changes in the property.
But I don't have to listen the change in GNOME and XFCE. I can get the right value of _NET_WORKAREA at login.
I guess KDE5 panel might be slow to be launched.

Probably I can use "notify::size" signal for GtkStatusIcon to listen the panel size.
But I don't know how to get the change of the panel size in KNotifications.
I migrated GtkStatusIcon to KNotifications recently since KDE5 does not enable notification area by default.
I use both the custom panel and panel icon of KNotifications now.

On 03/27/15 20:28, Luigi Toscano-san wrote:
> On Friday 27 of March 2015 19:21:35 Takao Fujiwara wrote:
>> I'd like to run a custom panel at bottom right in KDE5 for
>> ibus(propertypanel.vala): https://github.com/ibus/ibus/tree/master/ui/gtk3
>
> Hi, this is a Plasma 5 related question, try to ask on the plasma-devel list
> (now in CC, I don't remember if it requires a subscription). Question quoted
> below (I'm just the messenger):
>
>>
>> Since KDE5 allocates the owned panel at bottom, I try to get the desktop
>> height using _NET_CURRENT_DESKTOP atom. My custom panel runs at login time
>> and tries to get the desktop height using _NET_CURRENT_DESKTOP atom but
>> KDE5 panel still is not launched. How can I get when the KDE5 panel is
>> launched at login time?
>>
>> Actually I use both the custom panel and KNotifications icon.
>> When I get the callback of "org.kde.StatusNotifierWatcher" of The
>> KNotifications icon, KDE5 panel still is not allocated. I also checked the
>> atoms with xlsatoms command but I have no idea to get KDE panel.
>
> Ciao
>