How to create communication between 2 windows

[rubi-rock]

Hi,

I wrote a program in Python 3.10 with pyWebView and bottle server as the default server on OSX. It all works fine.

Now I would like to create a communication between 2 of the windows my application creates. I tried many js framework using localstorage, events... but none of them received the message.

Is there a way for one window to trigger an event into another one ?

Thanks,
Christian

[r0x0r]

You can leverage JS API to communicate between windows. This way you setup JS API for each window and facilitate interwindow communication in Python. Here is a toy example

import webview

window1 = None
window2 = None

class Api1:
    def sayHelloTo(self, name):
        if window2:
            window2.evaluate_js(f"document.write('Hello from {name}')")

class Api2:
    def sayHelloTo(self, name):
        if window1:
            window1.evaluate_js(f"document.write('Hello from {name}')")



if __name__ == '__main__':
    window1 = webview.create_window('Window #1', html='<button onclick="pywebview.api.sayHelloTo(\'window1\')">Say hello</button>', js_api=Api1())
    window2 = webview.create_window('Window #2', html='<button onclick="pywebview.api.sayHelloTo(\'window2\')">Say hello</button>', js_api=Api2())
    webview.start()

Local storage should work as long you use private_mode=False and connect to the same host for both windows.

[rubi-rock]

Thank you for the answer, so simple finally. You made my day !