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 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 Root(): left_value, set_left.current = idom.use_state(1) right_value, set_right.current = idom.use_state(1) return idom.html.div( LeftContext(Left(), value=left_value), RightContext(Right(), value=right_value), )
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 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 MovingDot(): position, set_position = use_state({"x": 0, "y": 0}) async def handle_pointer_move(event): outer_div_info = event["currentTarget"] outer_div_bounds = outer_div_info["boundingClientRect"] set_position({ "x": event["clientX"] - outer_div_bounds["x"], "y": event["clientY"] - outer_div_bounds["y"], }) return html.div( { "onPointerMove": handle_pointer_move, "style": { "position": "relative", "height": "200px", "width": "100%", "backgroundColor": "white", }, }, html.div({ "style": { "position": "absolute", "backgroundColor": "red", "borderRadius": "50%", "width": "20px", "height": "20px", "left": "-10px", "top": "-10px", "transform": f"translate({position['x']}px, {position['y']}px)", }, }), )
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 Grid(): line_size = 5 selected_indices, set_selected_indices = use_state({1, 2, 4}) def make_handle_click(index): def handle_click(event): if index in selected_indices: set_selected_indices(selected_indices - {index}) else: set_selected_indices(selected_indices | {index}) return handle_click return html.div( {"style": {"display": "flex", "flex-direction": "row"}}, [ html.div( { "onClick": make_handle_click(index), "style": { "height": "30px", "width": "30px", "backgroundColor": ( "black" if index in selected_indices else "white" ), "outline": "1px solid grey", "cursor": "pointer", }, }, key=index, ) for index in range(line_size) ], )
def SomeComponent(): items, set_items.current = idom.use_state([1, 2, 3]) return idom.html.div([ idom.html.div( idom.html.input({"onChange": lambda event: None}), key=str(i), ) for i in items ])
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 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 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 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 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 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 Form(): person, set_person = use_state({ "first_name": "Barbara", "last_name": "Hepworth", "email": "*****@*****.**", }) def handle_first_name_change(event): set_person({**person, "first_name": event["target"]["value"]}) def handle_last_name_change(event): set_person({**person, "last_name": event["target"]["value"]}) def handle_email_change(event): set_person({**person, "email": event["target"]["value"]}) return html.div( html.label( "First name: ", html.input( { "value": person["first_name"], "onChange": handle_first_name_change }, ), ), html.label( "First name: ", html.input( { "value": person["last_name"], "onChange": handle_last_name_change }, ), ), html.label( "First name: ", html.input( { "value": person["email"], "onChange": handle_email_change }, ), ), html.p( f"{person['first_name']} {person['last_name']} {person['email']}"), )
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 Outer(): inner_value, set_outer_value.current = idom.use_state(1) outer_value.current = idom.use_context(Context) outer_render_count.current += 1 return Context(Inner(), value=inner_value)
def use_toggle(initial=True): state, set_state = use_state(initial) return state, lambda: set_state(not state)
def use_counter(initial_value): state, set_state = use_state(initial_value) return state, lambda: set_state(state + 1)
def Outer(): state, set_outer_state.current = idom.use_state(0) inner_key, set_inner_key.current = idom.use_state("first") return idom.html.div(state, Inner(key=inner_key))
def SetStateDuringRender(): render_count.current += 1 state, set_state = idom.use_state(0) if not state: set_state(state + 1) return html.div(state)
def Inner(): state, set_inner_state.current = idom.use_state(make_default) return idom.html.div(state)
def SomeComponent(): message, set_message.current = idom.use_state("hello") idom.use_debug_value(lambda: f"message is {message!r}") return idom.html.div()
def OuterComponent(): key, set_key.current = idom.use_state("first") return ComponentWithEffect(key=key)
def ComponentProvidesContext(): state, set_state.current = idom.use_state(0) return Context(ComponentInContext(), value=state)
def Root(): outer_value, set_root_value.current = idom.use_state(-1) return Context(Outer(), value=outer_value)