app: Hotkeys #75

py/examples/hotkeys.py

@@ -0,0 +1,86 @@
+# ===
+# About: Basic Hello World app using Flask
+# Author: Prithvi Prabhu <prithvi.prabhu@gmail.com>
+# License: Apache-2.0
+# Source: https://github.com/h2oai/nitro/py/examples
+# Keywords: [basic, flask]
+#
+# Setup:
+# FILE requirements.txt EOF
+# flask
+# simple-websocket
+# h2o-nitro[web]
+# EOF
+# RUN python -m pip install -r requirements.txt
+# ENV FLASK_APP __file__
+# START python -m flask --debug run
+# ===
+
+from h2o_nitro import View, option
+
+
+# Hotkey handler for Cut (ctrl+x)
+def cut(view: View):
+    view('# You tried to cut!')
+
+
+# Hotkey handler for Copy (ctrl+c)
+def copy(view: View):
+    view('# You tried to copy!')
+
+
+# Hotkey handler for Paste (ctrl+v)
+def paste(view: View):
+    view('# You tried to paste!')
+
+
+def main(view: View):
+    view('''
+    # Copypasta!
+    
+    This is a simple demo of how to use hotkeys.
+    
+    - Press `ctrl+x` to cut.
+    - Press `ctrl+c` to copy.
+    - Press `ctrl+v` to paste.
+    ''')
+
+
+nitro = View(
+    main,
+    title='Hotkeys Demo',
+    caption='v1.0',
+    # Bind hotkey combinations to functions.
+    hotkeys=[
+        option(cut, 'ctrl+x'),
+        option(copy, 'ctrl+c'),
+        option(paste, 'ctrl+v'),
+    ],
+)
+
+# ┌─────────────── Flask Boilerplate ───────────────┐
+
+import simple_websocket
+from flask import Flask, request, send_from_directory
+from h2o_nitro_web import web_directory
+
+app = Flask(__name__, static_folder=web_directory, static_url_path='')
+
+
+@app.route('/')
+def home_page():
+    return send_from_directory(web_directory, 'index.html')
+
+
+@app.route('/nitro', websocket=True)
+def socket():
+    ws = simple_websocket.Server(request.environ)
+    try:
+        nitro.serve(ws.send, ws.receive)
+    except simple_websocket.ConnectionClosed:
+        pass
+    return ''
+
+
+if __name__ == '__main__':
+    app.run()