VS Code Extension, how to programme a refresh of PlantUML preview - visual-studio-code

How can I force PlantUML to refresh its preview, using code?
Longer Explanation
I have 2 editors open
Editor 1 contains a yml file.
Editor 2 contains a plantuml .wsd file
and a 3rd pane is showing the plantuml preview. (which is technically not an editor)
When I modify the yml file, it modifies a json model, and rewrites the .wsd file, and thus I get a new state diagram showing me the structure of my yml file in graph format.
The content of wsd is updating correctly when the yml changes. V1 created a new file each time, it saved fine I could see the content change, but the preview never updated.
Settings->PlantUML auto update is ticked.
In order to trigger the refresh I had to select the editor, and either modify or save.
So I re-wrote the code to select the editor 2 wsd contents, replace it in the existing file, and then save that file. Still the preview does not update.
I have also tried to fire the vscode command plantuml.preview, which is what the plantuml extension itself fires to display the preview, it fires and returns, but does not update the preview.
I have vscode.window.visibleTextEditors[ii], from which I can select the right editor, but I cannot find anything to set the focus. I've tried setting selections, and saving but still no refresh.
I am now trying to find the right vs code way to set the focus on the right editor and save it, then switch back to the left editor, mimicking pressing CMD-2, CMD-S, CMD-1, or manually selecting the editor and saving, which is the only way to update the preview.
I cannot find anything on how to set the editor focus, so perhaps I am going down the wrong path. Can anyone suggest how this could be done?

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Can't edit files in Vscode

I've just started using Vscode and have a created a WebAPI project. On trying to open any of the default code files (Startup.cs and Program.cs) whatever I type starts to appear in the blue bar as shown below instead of where I have placed the cursor. I have no idea what's going on or what that blue bar is.
I am able to add my own code files and edit these as I would expect.
I'm running Vscode 1.29.1 on Win 10 on a Dell Latitude 12 7275. The vscode extension
Enabled extensions :
That's caused by Vim extension. Uninstall or disable it, otherwise use insert key on your keyboard to put it in insert mode.
I'l leave this here for future readers
Basically, if I split files in tabs in VS Code, I could work with the files on the left hand side but could "read-only" all the files on the right hand side.
When I went to the extensions tabs I noticed that whatever I typed was being typed in the field in the extensions search bar. After deleting that, and clicking back on the "Files" tab, it went back to normal and can basically edit files on the both sides of my split screen.
If cannot type
Check where whatever you type is going (e.g. Extensions > Search bar)
Delete wherever it's being typed, and click back on the "Files tab"
Check if it works
I had to change the parent folders permission...
Try changing the entire folder to:
Read & Write: Allows a user to open the item and change it.
https://support.apple.com/guide/mac-help/change-permissions-for-files-folders-or-disks-mchlp1203/mac

QT Creator / Designer : Files CANNOT be edited in Designer mode anymore

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Well, for some reason, and at some point, my file now opens BY DEFAULT in the editor, and the message does not show up. Worse, when manually switching to Designer mode, the main editing field is gray and empty and none of my stuff shows up ... Also no scroll bars or anything.
EDIT : actually, it is whichever form was loaded last that appears. And it is editable and all ... only the drop-down menu with the file name clearly indicates that it is MY file that is opened. When I perform an edit, then the edit is performed to this same last-opened form, and is reflected upon compiling. My display remains unchanged to the state that it had the last time that I was able to open it in the Designer.
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How to programmatically reload a text editor in Eclipse?

In Eclipse, if I change a file programmatically, and it is open in a text editor, it doesn't always reload, not even when refreshing the resource programmatically. How can I forcibly reload the text editor from code so that it show the changed file contents?
In your project explorer or navigator, you can right-click on the file that's currently open and select refresh. This has always worked for me, even when editing files with several programs. Make sure to click the file itself, not parent objects like packages or folders or projects.
Edit
Refreshing programmatically? I would look into an Eclipse scripting tool:
http://eclipse-shell.sourceforge.net/
I guess there was another one called Monkey, but it doesn't appear to be maintained.
I don't know of any possibility to programmatically reload the file.
Some editors (e.g. GMF editors) look for changes in the underlying files, and refresh themselves, but this is not required at all.
I don't think that a forced reload is an option implemented globally, as in some cases there could be some merging steps involved that can be quite erroneous.
My ideas to solve this:
Have a specific editor that refreshes its content when the used resource changes (this can be timeconsuming);
Or close the editors of the file and reopen them (this is ugly in the eye of the user).
Since the Luna release of eclipse there's no need to reload files with F5/manual Refresh.
Really nice, especially as there was a bug with the F5 key binding.