How to disable cut-copy-paste pop up in webview on text selection in Flutter - flutter

How do I disable the cut-copy-paste pop-up in a web view in Flutter? I want the text selection feature to remain as it is, but I don't want the pop-up to appear. I googled a lot but nothing worked for me.
I am using this Flutter WebView.

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Programmatically Focus on on a webview (WKWebView)

I am working on a macOS app in which I am using a WKWebview to show web content.
However, after I clicked on another application and then click on my macOS app, I need to click twice on the Webview window, as it doesn't get activated by hovering my mouse over it.
It doesn't listen to events until I click the webview window.
I'm new to Swift and being used to Javascript I would just add a 'mouseenter' listener to the macOS window to focus the webview.
Does anybody know how to solve this?
Thanks!

Progress Icon in button type submit error

I am creating two buttons using form.io which is the type of Submit.
But here I am facing an issue when clicking on any button all the buttons on that page enables progress icon.
How can disable that progress icon or how can I enable for only the one which is clicked
I solved this problem using css , display none for the image

How can I detect focus in textfields in a webview using Swift 3?

I am building an application, and when I load a website in webview using Swift 3, the screen will appear like this, now I want to detect when user clicks on the email text field, and add a button to the navigation controller.
I don't know how to do it, does anyone have any idea?
The main use of webview is near like an iframe in web.
I mean that webview is just a displaying of internet content. By this way, you cannot detect any action like user clicks on email textfield.
According to me and currently, there is no possibility to do that because it is not the goal of a webview.

popover view for a status item not responsive to mouse movements

I have been struggling with this and could not find a solution.
I am creating a statusitem app for mac osx using swift. When the item is clicked a popover with a custom view that has a webview in it appears. everything works fine except that after clicking outside and the popover is closed and clicking again on statusitem to show popover this time the view (webview) is not responsive to mouse movement events like mouse hover a link etc.. unless I click inside the popover to activate it. I found a solution by calling NSApp.activateIgnoringOtherApps(true) but this greys out other opened applications like chrome.
Now my question is that, can I make the app active without greying out other apps? dropbox mac app is an example, clicking the item in status bar, opens the popover of dropbox and its responsive to mouse events but other opened apps in the background are not greyed out and they are responsive to mouse movement events, even after clicking inside it doesn't grey out other apps unless a window appear e.g. preferences window or login window. How to achieve this behaviour?
this image shows how webview is not interactive with mouse
the second image show how it is interactive with mouse hover effect on "Advertising Programs" but chrome app is greyed out

Disable scrolling on Soft Keyboard launch

I've been struggling with this for several days. I have a very simple page in my mobile app with a textarea input and when I click on it the soft keyboard appears and scrolls the header of my page out of view. Is there a way to prevent this default scrolling?
Your is the default functionality of Phones, When user completes typing the screen automatically scroll backs, Kindly check it, If it works please reply.