def ArtistList():
artist_to_add, set_artist_to_add = use_state("")
artists, set_artists = use_state(
["Marta Colvin Andrade", "Lamidi Olonade Fakeye", "Louise Nevelson"])
def handle_change(event):
set_artist_to_add(event["target"]["value"])
def handle_add_click(event):
if artist_to_add not in artists:
set_artists([*artists, artist_to_add])
set_artist_to_add("")
def make_handle_delete_click(index):
def handle_click(event):
set_artists(artists[:index] + artists[index + 1:])
return handle_click
return html.div(
html.h1("Inspiring sculptors:"),
html.input({
"value": artist_to_add,
"onChange": handle_change
}),
html.button({"onClick": handle_add_click}, "add"),
html.ul([
html.li(
name,
html.button({"onClick": make_handle_delete_click(index)},
"delete"),
key=name,
) for index, name in enumerate(artists)
]),
)
def App():
is_sent, set_is_sent = use_state(False)
message, set_message = use_state("")
if is_sent:
return html.div(
html.h1("Message sent!"),
html.button(
{"onClick": lambda event: set_is_sent(False)}, "Send new message?"
),
)
@event(prevent_default=True)
def handle_submit(event):
set_message("")
set_is_sent(True)
return html.form(
{"onSubmit": handle_submit, "style": {"display": "inline-grid"}},
html.textarea(
{
"placeholder": "Your message here...",
"value": message,
"onChange": lambda event: set_message(event["target"]["value"]),
}
),
html.button({"type": "submit"}, "Send"),
)
def ColorButton():
color, set_color = use_state("gray")
def handle_click(event):
set_color("orange")
set_color("pink")
set_color("blue")
def handle_reset(event):
set_color("gray")
return html.div(
html.button(
{
"onClick": handle_click,
"style": {
"backgroundColor": color
}
}, "Set Color"),
html.button(
{
"onClick": handle_reset,
"style": {
"backgroundColor": color
}
}, "Reset"),
)
def Definitions():
term_to_add, set_term_to_add = use_state(None)
definition_to_add, set_definition_to_add = use_state(None)
all_terms, set_all_terms = use_state({})
def handle_term_to_add_change(event):
set_term_to_add(event["target"]["value"])
def handle_definition_to_add_change(event):
set_definition_to_add(event["target"]["value"])
def handle_add_click(event):
if term_to_add and definition_to_add:
set_all_terms({**all_terms, term_to_add: definition_to_add})
set_term_to_add(None)
set_definition_to_add(None)
def make_delete_click_handler(term_to_delete):
def handle_click(event):
set_all_terms({t: d for t, d in all_terms.items() if t != term_to_delete})
return handle_click
return html.div(
html.button({"onClick": handle_add_click}, "add term"),
html.label(
"Term: ",
html.input({"value": term_to_add, "onChange": handle_term_to_add_change}),
),
html.label(
"Definition: ",
html.input(
{
"value": definition_to_add,
"onChange": handle_definition_to_add_change,
}
),
),
html.hr(),
[
html.div(
html.button(
{"onClick": make_delete_click_handler(term)}, "delete term"
),
html.dt(term),
html.dd(definition),
key=term,
)
for term, definition in all_terms.items()
],
)
def Gallery():
index, set_index = hooks.use_state(0)
def handle_click(event):
set_index(index + 1)
bounded_index = index % len(sculpture_data)
sculpture = sculpture_data[bounded_index]
alt = sculpture["alt"]
artist = sculpture["artist"]
description = sculpture["description"]
name = sculpture["name"]
url = sculpture["url"]
return html.div(
html.button({"onClick": handle_click}, "Next"),
html.h2(name, " by ", artist),
html.p(f"({bounded_index + 1} of {len(sculpture_data)})"),
html.img({
"src": url,
"alt": alt,
"style": {
"height": "200px"
}
}),
html.p(description),
)
def Root():
toggle, toggle_type.current = use_toggle(True)
handler = element_static_handler.use(lambda: None)
if toggle:
return html.div(html.button({"onEvent": handler}))
else:
return html.div(SomeComponent())
def ArtistList():
artists, set_artists = use_state(
["Marta Colvin Andrade", "Lamidi Olonade Fakeye", "Louise Nevelson"])
def handle_sort_click(event):
set_artists(list(sorted(artists)))
def handle_reverse_click(event):
set_artists(list(reversed(artists)))
return html.div(
html.h1("Inspiring sculptors:"),
html.button({"onClick": handle_sort_click}, "sort"),
html.button({"onClick": handle_reverse_click}, "reverse"),
html.ul([html.li(name, key=name) for name in artists]),
)
def Counter():
number, set_number = use_state(0)
def handle_click(event):
set_number(number + 5)
print(number)
return html.div(
html.h1(number),
html.button({"onClick": handle_click}, "Increment"),
)
def Counter():
number, set_number = use_state(0)
async def handle_click(event):
await asyncio.sleep(3)
set_number(lambda old_number: old_number + 1)
return html.div(
html.h1(number),
html.button({"onClick": handle_click}, "Increment"),
)
def Scene():
position, set_position = use_state(Position(100, 100, 0))
return html.div(
{"style": {"width": "225px"}},
html.div(
{
"style": {
"width": "200px",
"height": "200px",
"backgroundColor": "slategray",
}
},
image(
"png",
CHARACTER_IMAGE,
{
"style": {
"position": "relative",
"left": f"{position.x}px",
"top": f"{position.y}.px",
"transform": f"rotate({position.angle}deg) scale(2, 2)",
}
},
),
),
html.button({"onClick": lambda e: set_position(translate(x=-10))}, "Move Left"),
html.button({"onClick": lambda e: set_position(translate(x=10))}, "Move Right"),
html.button({"onClick": lambda e: set_position(translate(y=-10))}, "Move Up"),
html.button({"onClick": lambda e: set_position(translate(y=10))}, "Move Down"),
html.button({"onClick": lambda e: set_position(rotate(-30))}, "Rotate Left"),
html.button({"onClick": lambda e: set_position(rotate(30))}, "Rotate Right"),
)
def Counter():
number, set_number = use_state(0)
async def handle_click(event):
set_number(number + 5)
print("about to print...")
await asyncio.sleep(3)
print(number)
return html.div(
html.h1(number),
html.button({"onClick": handle_click}, "Increment"),
)
def Parent():
state, set_state = use_state(0)
return html.div(
html.button(
{
"onClick":
set_child_key_num.use(lambda: set_state(state + 1))
},
"click me",
),
Child("some-key"),
Child(f"key-{state}"),
)
def Gallery():
index, set_index = hooks.use_state(0)
show_more, set_show_more = hooks.use_state(False)
def handle_next_click(event):
set_index(index + 1)
def handle_more_click(event):
set_show_more(not show_more)
bounded_index = index % len(sculpture_data)
sculpture = sculpture_data[bounded_index]
alt = sculpture["alt"]
artist = sculpture["artist"]
description = sculpture["description"]
name = sculpture["name"]
url = sculpture["url"]
return html.div(
html.button({"onClick": handle_next_click}, "Next"),
html.h2(name, " by ", artist),
html.p(f"({bounded_index + 1} or {len(sculpture_data)})"),
html.img({
"src": url,
"alt": alt,
"style": {
"height": "200px"
}
}),
html.div(
html.button(
{"onClick": handle_more_click},
f"{'Show' if show_more else 'Hide'} details",
),
(html.p(description) if show_more else ""),
),
)
def App():
recipient, set_recipient = use_state("Alice")
message, set_message = use_state("")
@event(prevent_default=True)
async def handle_submit(event):
set_message("")
print("About to send message...")
await asyncio.sleep(5)
print(f"Sent '{message}' to {recipient}")
return html.form(
{
"onSubmit": handle_submit,
"style": {
"display": "inline-grid"
}
},
html.label(
"To: ",
html.select(
{
"value":
recipient,
"onChange":
lambda event: set_recipient(event["target"]["value"]),
},
html.option({"value": "Alice"}, "Alice"),
html.option({"value": "Bob"}, "Bob"),
),
),
html.input({
"type":
"text",
"placeholder":
"Your message...",
"value":
message,
"onChange":
lambda event: set_message(event["target"]["value"]),
}),
html.button({"type": "submit"}, "Send"),
)
def DivInDiv():
stop_propagatation, set_stop_propagatation = hooks.use_state(True)
inner_count, set_inner_count = hooks.use_state(0)
outer_count, set_outer_count = hooks.use_state(0)
div_in_div = html.div(
{
"onClick": lambda event: set_outer_count(outer_count + 1),
"style": {
"height": "100px",
"width": "100px",
"backgroundColor": "red"
},
},
html.div(
{
"onClick":
event(
lambda event: set_inner_count(inner_count + 1),
stop_propagation=stop_propagatation,
),
"style": {
"height": "50px",
"width": "50px",
"backgroundColor": "blue"
},
}, ),
)
return html.div(
html.button(
{
"onClick":
lambda event: set_stop_propagatation(not stop_propagatation)
},
"Toggle Propogation",
),
html.pre(f"Will propagate: {not stop_propagatation}"),
html.pre(f"Inner click count: {inner_count}"),
html.pre(f"Outer click count: {outer_count}"),
div_in_div,
)
def CounterList():
counters, set_counters = use_state([0, 0, 0])
def make_increment_click_handler(index):
def handle_click(event):
new_value = counters[index] + 1
set_counters(counters[:index] + [new_value] + counters[index + 1 :])
return handle_click
return html.ul(
[
html.li(
count,
html.button({"onClick": make_increment_click_handler(index)}, "+1"),
key=index,
)
for index, count in enumerate(counters)
]
)
def ArtistList():
artist_to_add, set_artist_to_add = use_state("")
artists, set_artists = use_state([])
def handle_change(event):
set_artist_to_add(event["target"]["value"])
def handle_click(event):
if artist_to_add and artist_to_add not in artists:
set_artists([*artists, artist_to_add])
set_artist_to_add("")
return html.div(
html.h1("Inspiring sculptors:"),
html.input({
"value": artist_to_add,
"onChange": handle_change
}),
html.button({"onClick": handle_click}, "add"),
html.ul([html.li(name, key=name) for name in artists]),
)
def Root():
event_name, set_event_name.current = use_state("first")
return html.button({
event_name:
event_handler.use(lambda: did_trigger.set_current(True))
})
def SomeComponent():
handler = component_static_handler.use(lambda: None)
return html.button({"onAnotherEvent": handler})
def Button():
return html.button("I don't do anything yet")
def PrintButton(display_text, message_text):
def handle_event(event):
print(message_text)
return html.button({"onClick": handle_event}, display_text)
def ButtonWithDelay(message, delay):
async def handle_event(event):
await asyncio.sleep(delay)
print(message)
return html.button({"onClick": handle_event}, message)
def Button():
def handle_event(event):
print(event)
return html.button({"onClick": handle_event}, "Click me!")
def Button(display_text, on_click):
return html.button({"onClick": on_click}, display_text)
