class LockingView(LonaView):
def handle_request(self, request):
now = Span()
self.message = Div('Button not clicked')
self.button = Button('Button')
self.html = Div(
H2('Server State Locking View'),
Div(Strong('Now: '), now),
Br(),
self.message,
self.button,
)
while True:
self.server.state['now'] = str(datetime.now())
now.set_text(self.server.state['now'])
self.show(self.html)
self.sleep(1)
def handle_input_event(self, input_event):
with self.server.state.lock:
self.message.set_text('Button clicked; Lock')
self.show(self.html)
self.sleep(2)
self.message.set_text('Unlock')
self.show(self.html)
def handle_request(self, request):
div = Div()
html = HTML(
H2('Set Title'),
A('Back', href='/'),
div,
)
self.show(html)
while True:
for i in range(3):
title = 'Title {}'.format(i)
div.set_text(
"Using set_title(); Title should be '{}'".format(title))
self.set_title(title)
self.show()
self.sleep(1)
for i in range(3):
title = 'Title {}'.format(i)
div.set_text("using show; Title should be '{}'".format(title))
self.show(html, title=title)
self.sleep(1)
def handle_request(self, request):
request_data = {
'GET': request.GET,
'POST': request.POST,
}
message = Div()
html = HTML(
H2('Form View'),
Pre(pformat(request_data)),
Button('Interactive GET', _id='interactive-get'),
Button('Interactive POST', _id='interactive-post'),
Br(),
Button('Non Interactive GET', _id='non-interactive-get'),
Button('Non Interactive POST', _id='non-interactive-post'),
)
input_event = self.await_click(html=html)
action = '.'
method = 'post'
if (input_event.node_has_id('non-interactive-get')
or input_event.node_has_id('interactive-get')):
method = 'get'
html = HTML(
H2('Form View'),
message,
Form(
TextInput(name='text'),
Submit('Submit'),
method=method,
action=action,
),
)
if (input_event.node_has_id('non-interactive-get')
or input_event.node_has_id('non-interactive-post')):
message.set_text('View stopped')
return html
else:
message.set_text('View waits for input events')
self.await_input_event(html=html)
def handle_request(self, request, name='blank'):
message = Div('View not started yet')
log = Div()
start = Button('Start')
start_daemonized = Button('Start daemonized')
html = Div(
H2('Daemonized View (name={})'.format(name)),
message,
log,
start,
start_daemonized,
)
input_event = self.await_input_event(html=html)
if input_event.node == start_daemonized:
self.daemonize()
message.set_text('View started daemonized')
else:
message.set_text('View started normal')
for i in range(15):
log.set_text('Counting ({}/15)'.format(i + 1))
self.show(html)
self.sleep(1)
message.set_text('View stopped')
self.show(html)
def handle_request(self, request):
timestamp = Div()
html = HTML(
H1('Interactive View'),
A('Home', href='/'),
timestamp,
)
while True:
timestamp.set_text(str(datetime.now()))
self.show(html)
self.sleep(1)
class TestWidget(Widget):
STATIC_FILES = [
Script(name='TestWidget', path='widget_data.js'),
]
FRONTEND_WIDGET_CLASS = 'widget_data'
def __init__(self):
self.server_state = Div()
self.nodes = [
self.server_state,
Div(_id='client-state'),
]
def update_state(self):
self.server_state.set_text(dumps(self.data))
def handle_request(self, request):
message = Div('Button not clicked')
button = Button('Click me!')
html = HTML(
H1('Click the button!'),
message,
button,
)
self.show(html)
# this call blocks until the button was clicked
input_event = self.await_click(button)
if input_event.node == button:
message.set_text('Button clicked')
return html
class ClassBasedView(LonaView):
def handle_request(self, request):
self.message = Div('Nothing clicked yet')
self.html = HTML(
H2('Class Based View'), self.message, Br(),
Button('handle_input_event_root()', _id='handle_input_event_root'),
Button('handle_input_event()', _id='handle_input_event'),
Button('handle_request()', _id='handle_request'), Br(),
Button('Stop View', _id='stop_view'))
while True:
input_event = self.await_click(
self.html[-3],
self.html[-1],
html=self.html,
)
if input_event.node == self.html[-1]:
self.message.set_text('View Stopped')
self.show(self.html)
return
self.message.set_text('handled by handle_request()')
def handle_input_event_root(self, input_event):
if input_event.node_has_id('handle_input_event_root'):
self.message.set_text('handled by handle_input_event_root()')
else:
return input_event
def handle_input_event(self, input_event):
if input_event.node_has_id('handle_input_event'):
self.message.set_text('handled by handle_input_event()')
else:
return input_event