The best way to prevent zooming?

 Hi Stefan

I am using wincc unified 18 Update 3 can you please advise what is the best way to prevent zooming which is not needed on site.

My understanding at the moment is the following:

1. For each window screen the tickbox to allow zooming should be deselected
2. For the room or base screen on load event UI.RootWindow.InteractiveZooming = false; should be added
3. What about each screen itself ? does it require UI.RootWindow.InteractiveZooming = false; as well?

Regards

Stefan Arcularius

Hi,

Unfortunately, the default setting for a screen window is to allow zooming. To work without zooming, you must change this property for each screen window.

However, there is also an internal screen window, the root screen window. As of WinCC Unified V18 Update 1, the properties of the root screen can be accessed via the screen management, but due to a bug this has no effect on a Unified Comfort Panel. So in case of a Unified Comfort Panel you have to use scripting. You can add the following code to the OnLoaded event of the start screen to disable zooming for the root screen:

UI.RootWindow.InteractiveZooming = false;

Kind regards
Stefan

------------------------------------------------------------------------------------------
Split from How can disable zoom in & zoom out option for screens in in v18??.

 hi Stefan

I tried to use your example for TopLevelScreenWindow but still struggling...

HMIRuntime.UI.Windows.TopLevelWindows.Item("MyScreenName").TopLevelScreenWindow.InteractiveZooming = false;

My syntax above is not accepted "TopLevelWindow" is not recognised by Intelisence.

Can you please give me advise how to call it properly?

Regards

Stefan Arcularius

Hi hewking103,

The InteractiveZooming property is available for ScreenWindow, PopupScreenWindow, and TopLevelScreenWindow. If you do not want to allow zooming at all, you must set this property to false for all windows. Since there is only one TopLevelScreenWindow available, you only need to change this once.

Kind regards
Stefan

hi Stefan

Again thanks for help. I will test the change once i have access to the panel as obviously it does not work on the pc runtime.

My project was migrated from TIA17 and i believe there was no Screen Management section in the HMI engineering - i have this area completely empty - do i need to configure anything in there to disable zooming by using the syntax you suggested?

UI.RootWindow.InteractiveZooming = false;

 For now i my startup screen on Load event has the above command.

Regards

 hi Stefan

Thank you for highlighting it. Yes i did upgrade the software on the physical panel MPT1500 and i am using the latest image 18 Upd3. It did already solve some of the issues.

Stefan Arcularius

Hi hewking103,

When you upgrade the project, you should also consider upgrading the device version within the project. This will allow you to take advantage of new features introduced in newer device versions.

Kind regards
Stefan

 Hi Stefan 

I put code

UI.RootWindow.InteractiveZooming = false;

behind the Load Event on the startup screen but it did not prevent the operator from zooming in and out.

1. Is it the right place were i was meant to put that code?

I will go back to this tomorrow and use inbuilt property to disable zooming in on the 5 Screen Windows which are placed on the Startup Screen 

"Format\Zoom Allow" property of the screenwindow

Stefan Arcularius

Hi hewking103,

The TopLevelScreenWindow is accessed through UI.RootWindow. So it is simply

UI.RootWindow.InteractiveZooming = false;

to disable zooming of the TopLevelScreenWindow. Sorry for the confusing names, I just used the names from the manual.

Kind regards
Stefan