Re: Prevent VNC display from stretching?

[McRoy, Jeffrey (GE Healthcare)]

Hi Andrew,

If you are using the stock Gaucamole client, you can modify the default 
behavior in the javascript to prevent autoFit at startup and set the zoom 
increments to whatever you want.

In guacamole.js you will find the below. Don't foget to re-minify the 
javascript into guacamole.min.js after you make changes.


Regards,
Jeff


/**
 * Whether the Guacamole display should be scaled to fit the browser
 * window.
 *
 * @type Boolean
 */
autoFit : true,

$scope.zoomIn = function zoomIn() {
$scope.menu.autoFit = false;
$scope.client.clientProperties.autoFit = false;
$scope.client.clientProperties.scale += 0.1;
};

$scope.zoomOut = function zoomOut() {
$scope.client.clientProperties.autoFit = false;
$scope.client.clientProperties.scale -= 0.1;
};

On 2/22/18, 7:24 AM, "amlamarra"  wrote:

I'd like to disable scaling in VNC. Right now, I'm able to get the scaling
set to 100% by doing the following:
Open the Guacamole menu (press Ctrl+Alt+Shift)
Uncheck "Automatically fit to browser window" under Display
Un-maxmize browser window
Check "Automatically fit to browser window"
Uncheck "Automatically fit to browser window"

Now I'm at 100%. And those zoom buttons don't work very well either. It only
goes in increments of 10%. And if you're at 109% and zoom out, then you're
set to 99%... It just seems kinda wonky. I wasn't sure if there was anything
I can do to set scaling to 100% no matter what.



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Re: Prevent VNC display from stretching?

[amlamarra]

I'd like to disable scaling in VNC. Right now, I'm able to get the scaling
set to 100% by doing the following:
Open the Guacamole menu (press Ctrl+Alt+Shift)
Uncheck "Automatically fit to browser window" under Display
Un-maxmize browser window
Check "Automatically fit to browser window"
Uncheck "Automatically fit to browser window"

Now I'm at 100%. And those zoom buttons don't work very well either. It only
goes in increments of 10%. And if you're at 109% and zoom out, then you're
set to 99%... It just seems kinda wonky. I wasn't sure if there was anything
I can do to set scaling to 100% no matter what.



--
Sent from: 
http://apache-guacamole-general-user-mailing-list.2363388.n4.nabble.com/

Re: Prevent VNC display from stretching?

[Nick Couchman]

>
> - Get VNC to behave the way RDP does, where the resolution of the client
> is passed to the server at connection time and the remote display
> automatically sizes to the correct resolution specified by the client?
>
> I'm not certain how feasible the first option is in Guacamole; the second
> - getting VNC to dynamically pass resolution from client to server - is not
> possible, and is a limitation of the VNC protocol, not of Guacamole.  You
> can work around it using xrandr to add the client resolution and resize the
> VNC server display, but I don't know of a way to automate that process
> native to VNC.
>
>
Just one quick note of clarification, here - it looks like some VNC
client/server systems have implemented dynamic sizing support by extensions
the VNC (RFB, actually) protocol, but these extensions are very
product-specific and are not standardized across different pieces of
software.  So, supporting each of these implementations would be difficult,
and some of them would not be possible, for commercial products that do not
provide source code or documentation for their extensions.

-Nick

Re: Prevent VNC display from stretching?

[Nick Couchman]

On Wed, Feb 21, 2018 at 9:59 PM, amlamarra  wrote:

> Is there a way to get VNC connections from stretching (or shrinking) the
> display by default? I'd like to keep it at 100%.
>
>
It's not entirely clear what you mean, here:
- Disable "scaling" of the VNC display, such that the zoom remains at 100%
and you get scrollbars and/or a black border?
or
- Get VNC to behave the way RDP does, where the resolution of the client is
passed to the server at connection time and the remote display
automatically sizes to the correct resolution specified by the client?

I'm not certain how feasible the first option is in Guacamole; the second -
getting VNC to dynamically pass resolution from client to server - is not
possible, and is a limitation of the VNC protocol, not of Guacamole.  You
can work around it using xrandr to add the client resolution and resize the
VNC server display, but I don't know of a way to automate that process
native to VNC.

-Nick