pub trait PointerEventAware: RawElWrapper {
Show 22 methods
// Provided methods
fn on_hovered_change_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self { ... }
fn on_hovered_change(
self,
handler: impl FnMut(bool) + Send + Sync + 'static,
) -> Self { ... }
fn hovered_sync(self, hovered: Mutable<bool>) -> Self { ... }
fn on_click_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static,
) -> Self { ... }
fn on_click(self, handler: impl FnMut() + Send + Sync + 'static) -> Self { ... }
fn on_click_propagation_stoppable(
self,
handler: impl FnMut() + Send + Sync + 'static,
propagation_stopped: impl Signal<Item = bool> + Send + 'static,
) -> Self { ... }
fn on_click_stop_propagation(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self { ... }
fn on_right_click(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self { ... }
fn on_click_outside_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static,
) -> Self { ... }
fn on_click_outside(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self { ... }
fn on_pressed_with_system_blockable<Marker, Blocked: Component>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self { ... }
fn on_pressed_change_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self { ... }
fn on_pressed_change(
self,
handler: impl FnMut(bool) + Send + Sync + 'static,
) -> Self { ... }
fn on_pressing_with_system_blockable<Marker, Blocked: Component>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
) -> Self { ... }
fn on_pressing_blockable<Blocked: Component>(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self { ... }
fn on_pressing_blockable_signal(
self,
handler: impl FnMut() + Send + Sync + 'static,
blocked: impl Signal<Item = bool> + Send + 'static,
) -> Self { ... }
fn on_pressing(self, handler: impl FnMut() + Send + Sync + 'static) -> Self { ... }
fn on_pressing_with_system_throttled<Fut: Future<Output = ()> + Send + 'static, Marker>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
throttle: impl FnMut() -> Fut + Send + 'static,
) -> Self { ... }
fn on_pressing_with_system_with_sleep_throttle<Marker>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
duration: Duration,
) -> Self { ... }
fn on_pressing_throttled<Fut: Future<Output = ()> + Send + 'static>(
self,
handler: impl FnMut() + Send + Sync + 'static,
throttle: impl FnMut() -> Fut + Send + 'static,
) -> Self { ... }
fn on_pressing_with_sleep_throttle(
self,
handler: impl FnMut() + Send + Sync + 'static,
duration: Duration,
) -> Self { ... }
fn pressed_sync(self, pressed: Mutable<bool>) -> Self { ... }
}Expand description
Enables reacting to pointer events like hover, click, and press. Port of MoonZoon’s PointerEventAware.
Provided Methods§
Sourcefn on_hovered_change_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self
fn on_hovered_change_with_system<Marker>( self, handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static, ) -> Self
Sourcefn on_hovered_change(
self,
handler: impl FnMut(bool) + Send + Sync + 'static,
) -> Self
fn on_hovered_change( self, handler: impl FnMut(bool) + Send + Sync + 'static, ) -> Self
When this element’s hover state changes, run a function with its current hovered state. This method can be called repeatedly to register many such handlers.
Examples found in repository?
examples/scroll_grid.rs (lines 77-81)
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
fn letter(
x: usize,
y: usize,
letter_color: impl Signal<Item = LetterColor> + Send + 'static,
) -> impl Element {
El::<TextBundle>::new()
.on_hovered_change(move |is_hovered| {
if is_hovered {
async_world().insert_resource(HoveredCell(x, y)).apply(spawn).detach()
}
})
.text_signal(
letter_color.map(|LetterColor { letter, color }|
Text::from_section(
letter,
TextStyle {
font_size: LETTER_SIZE,
color,
..default()
},
)
)
)
}
#[derive(Clone, Default)]
struct LetterColor {
letter: String,
color: Color,
}
#[derive(Resource)]
struct Rails {
vertical: Vec<Vec<LetterColor>>,
horizontal: Vec<Vec<LetterColor>>,
}
const ROYGBIV: &[Srgba] = &[
bevy::color::palettes::css::RED,
bevy::color::palettes::css::ORANGE,
bevy::color::palettes::css::YELLOW,
bevy::color::palettes::css::GREEN,
bevy::color::palettes::css::BLUE,
bevy::color::palettes::css::INDIGO,
bevy::color::palettes::css::VIOLET,
];
static CELLS: Lazy<Vec<Vec<Mutable<LetterColor>>>> = Lazy::new(|| {
let cells = (0..5)
.map(|_| (0..5).map(|_| Mutable::new(default())).collect::<Vec<_>>())
.collect::<Vec<_>>();
let letters = "abcdefghijklmnopqrstuvwxyz";
for i in 0..5 {
for (j, letter) in letters.chars().skip(i).take(5).enumerate() {
cells[i][j].set(LetterColor {
letter: letter.to_string(),
color: ROYGBIV[i].into(),
});
}
}
cells
});
fn ui_root() -> impl Element {
El::<NodeBundle>::new()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.align_content(Align::center())
.child(
Grid::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(15.))
.on_hovered_change(move |is_hovered| {
if !is_hovered {
async_world().remove_resource::<HoveredCell>().apply(spawn).detach()
}
})
.row_wrap_cell_width(48.)
.width(Val::Px(300.))
.height(Val::Px(5. * LETTER_SIZE))
.align(Align::center())
.cells(CELLS.iter().enumerate().flat_map(|(x, cells)| {
cells
.iter()
.enumerate()
.map(move |(y, cell)| letter(x, y, cell.signal_cloned()))
})),
)
}More examples
examples/main_menu.rs (line 630)
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
fn menu_item(label: &str, body: impl Element, hovered: Mutable<bool>) -> Stack<NodeBundle> {
Stack::<NodeBundle>::new()
.background_color_signal(
hovered
.signal()
.map_bool(|| NORMAL_BUTTON.lighter(0.05), || NORMAL_BUTTON)
.map(BackgroundColor),
)
.on_hovered_change(move |is_hovered| only_one_up_flipper(&hovered, &MENU_ITEM_HOVERED_OPTION, Some(is_hovered)))
.width(Val::Percent(100.))
.height(Val::Px(MENU_ITEM_HEIGHT))
.with_style(|mut style| style.padding = UiRect::axes(Val::Px(BASE_PADDING), Val::Px(BASE_PADDING / 2.)))
.layer(
El::<TextBundle>::new()
.text(text(label))
.align(Align::new().left().center_y()),
)
.layer(body.align(Align::new().right().center_y()))
}
struct Dropdown {
el: El<NodeBundle>,
controlling: Mutable<bool>,
}
fn focus_on_signal<E: Element>(element: E, signal: impl Signal<Item = bool> + Send + 'static) -> E {
element.update_raw_el(|raw_el| {
raw_el.on_signal(signal.dedupe(), |entity, focus| async move {
if focus {
// at first, i was using a `static_ref` global `Mutable<Option<Entity>>` for this
// and wrapping it in a resource for accessing it in the menu input event systems, but this is an
// anti pattern; the ecs should not be polling reactive ui state for syncing its own
// state/systems (there's an example of this anti pattern in the ecs world ui world sync example https://github.com/databasedav/haalka/blob/main/examples/ecs_ui_sync/src/main.rs#L154);
// instead, like we do here, simply use the `async_world` to update the ecs state *exactly and only*
// when it needs to be
async_world().insert_resource(FocusedEntity(entity)).await;
// TODO: remove reference to ecs world ui world sync example once fixed
}
})
})
}
impl Dropdown {
fn new<T: Clone + PartialEq + Display + Send + Sync + 'static>(
options: MutableVec<T>,
selected: Mutable<Option<T>>,
clearable: bool,
) -> Self {
let show_dropdown = Mutable::new(false);
let hovered = Mutable::new(false);
let controlling = Mutable::new(false);
let options_hovered =
MutableVec::new_with_values((0..options.lock_ref().len()).map(|_| Mutable::new(false)).collect());
let el = {
El::<NodeBundle>::new()
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
input_event_listener_controller(
element,
controlling.signal(),
clone!((show_dropdown, hovered, options, options_hovered, selected) move || {
On::<MenuInputEvent>::run(clone!((show_dropdown, hovered, options, options_hovered, selected) move |mut event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Up | MenuInput::Down => {
if show_dropdown.get() {
event.stop_propagation();
let hovered_option = options_hovered.lock_ref().iter().position(|hovered| hovered.get());
if let Some(i) = hovered_option {
options_hovered.lock_ref()[i].set(false);
}
let (mut i, step) = {
if matches!(event.input, MenuInput::Up) {
(hovered_option.unwrap_or(options.lock_ref().len() - 1) as isize, -1)
} else {
(hovered_option.unwrap_or(0) as isize, 1)
}
};
if hovered_option.is_some() || (selected.lock_ref().is_some() && Some(&options.lock_ref()[i as usize]) == selected.lock_ref().as_ref()) {
for _ in 0..options.lock_ref().len() {
i = (i + step + options.lock_ref().len() as isize) % options.lock_ref().len() as isize;
if Some(&options.lock_ref()[i as usize]) != selected.lock_ref().as_ref() {
break;
}
}
}
options_hovered.lock_ref()[i as usize].set(true);
} else {
hovered.set_neq(false);
}
}
MenuInput::Select => {
hovered.set_neq(!show_dropdown.get());
let hovered_option = options_hovered.lock_ref().iter().position(|hovered| hovered.get());
if let Some(i) = hovered_option {
options_hovered.lock_ref()[i].set(false);
selected.set_neq(Some(options.lock_ref()[i].clone()));
}
flip(&show_dropdown);
for hovered in options_hovered.lock_ref().iter() {
hovered.set(false);
}
},
MenuInput::Back => {
if show_dropdown.get() {
event.stop_propagation();
for hovering in options_hovered.lock_ref().iter() {
hovering.set(false);
}
flip(&show_dropdown);
}
hovered.set(false);
},
MenuInput::Delete => {
if clearable {
selected.take();
}
},
_ => ()
}
}))
})
)
})
.child(
Button::new()
.width(Val::Px(300.))
.hovered_signal(hovered.signal())
.body(
Stack::<NodeBundle>::new()
.width(Val::Percent(100.))
.with_style(|mut style| style.padding = UiRect::horizontal(Val::Px(BASE_PADDING)))
.layer(
El::<TextBundle>::new()
.align(Align::new().left())
.text_signal(
selected.signal_cloned()
.map(|selected_option| {
selected_option.map(|option| option.to_string()).unwrap_or_default()
})
.map(text)
)
)
.layer(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(BASE_PADDING))
.align(Align::new().right())
.item_signal(
// TODO: this should just work, but compiler asks for type info
// clearable.then(||
// selected.signal_ref(Option::is_some).dedupe()
// .map_true(clone!((selected) move || x_button(clone!((selected) move || { selected.take(); }))))
// )
if clearable {
selected.signal_ref(Option::is_some).dedupe()
.map_true(clone!((selected) move || x_button(clone!((selected) move || { selected.take(); }))))
.boxed()
} else {
always(None).boxed()
}
)
.item(
El::<TextBundle>::new()
// TODO: need to figure out to rotate in place (around center)
// .on_signal_with_transform(show_dropdown.signal(), |transform, showing| {
// transform.rotate_around(Vec3::X, Quat::from_rotation_z((if showing { 180.0f32 } else { 0. }).to_radians()));
// })
.text(text("v"))
)
)
)
.on_click(clone!((show_dropdown) move || {
only_one_up_flipper(&show_dropdown, &DROPDOWN_SHOWING_OPTION, None);
}))
)
// TODO: this should be element below signal
.child_signal(
show_dropdown.signal()
.map_true(clone!((options, show_dropdown, selected) move || {
Column::<NodeBundle>::new()
.width(Val::Percent(100.))
.with_style(|mut style| {
style.position_type = PositionType::Absolute;
style.top = Val::Percent(100.);
})
.items_signal_vec(
options.signal_vec_cloned()
.enumerate()
.filter_signal_cloned(clone!((selected) move |(_, option)| {
selected.signal_ref(clone!((option) move |selected_option| {
selected_option.as_ref() != Some(&option)
}))
.dedupe()
}))
.map_signal(clone!((selected, show_dropdown, options_hovered) move |(i_mutable, option)| {
i_mutable.signal()
.map_some(clone!((options_hovered, selected, show_dropdown, option) move |i| {
if let Some(hovered) = options_hovered.lock_ref().get(i) {
text_button(
always(option.to_string()),
clone!((selected, show_dropdown, option) move || {
selected.set_neq(Some(option.clone()));
flip(&show_dropdown);
})
)
.width(Val::Percent(100.))
.hovered_signal(hovered.signal())
.apply(Some)
} else {
None
}
}))
}))
.map(Option::flatten)
)
}))
)
};
Self { el, controlling }
}
}
impl ElementWrapper for Dropdown {
type EL = El<NodeBundle>;
fn element_mut(&mut self) -> &mut Self::EL {
&mut self.el
}
}
impl Controllable for Dropdown {
fn controlling(&self) -> &Mutable<bool> {
&self.controlling
}
}
fn focus_on_no_child_hovered<E: Element>(
element: E,
hovereds: impl SignalVec<Item = Mutable<bool>> + Send + 'static,
) -> E {
focus_on_signal(element, {
hovereds
.map_signal(|hovered| hovered.signal())
.to_signal_map(|is_hovereds| !is_hovereds.iter().copied().any(identity))
.dedupe()
})
}
fn sub_menu_child_hover_manager<E: Element>(element: E, hovereds: MutableVec<Mutable<bool>>) -> E {
let l = hovereds.lock_ref().len();
element.apply(|element| {
input_event_listener_controller(
element,
always(true),
clone!((hovereds) move || {
On::<MenuInputEvent>::run(clone!((hovereds) move |event: ListenerMut<MenuInputEvent>| {
let hovereds_lock = hovereds.lock_ref();
match event.input {
MenuInput::Up | MenuInput::Down => {
let hovered_option = hovereds_lock.iter().position(|hovered| hovered.get());
if let Some(i) = hovered_option {
hovereds_lock[i].set(false);
let new_i = if matches!(event.input, MenuInput::Up) { i + l - 1 } else { i + 1 } % l;
hovereds_lock[new_i].set(true);
} else {
let i = if matches!(event.input, MenuInput::Up) { hovereds_lock.len() - 1 } else { 0 };
hovereds_lock[i].set(true);
}
},
MenuInput::Back => {
if hovereds_lock.iter().any(|hovered| hovered.get()) {
for hovered in hovereds_lock.iter() {
hovered.set(false)
}
} else {
SHOW_SUB_MENU.set(None);
}
},
_ => ()
}
}))
}),
)
})
}
fn make_controlling_menu_item(label: &str, el: impl Controllable + Element) -> (Stack<NodeBundle>, Mutable<bool>) {
let hovered = Mutable::new(false);
(
menu_item(label, el.controlling_signal(hovered.signal()), hovered.clone()),
hovered,
)
}
fn audio_menu() -> Column<NodeBundle> {
let items_hovereds = [
make_controlling_menu_item(
"dropdown",
Dropdown::new(
MutableVec::new_with_values(options(4)),
MISC_DEMO_SETTINGS.dropdown.clone(),
true,
),
),
make_controlling_menu_item(
"radio group",
RadioGroup::new(
MutableVec::new_with_values(options(3)),
MISC_DEMO_SETTINGS.radio_group.clone(),
),
),
make_controlling_menu_item("checkbox", Checkbox::new(MISC_DEMO_SETTINGS.checkbox.clone())),
make_controlling_menu_item(
"iterable options",
IterableOptions::new(
MutableVec::new_with_values(options(4)),
MISC_DEMO_SETTINGS.iterable_options.clone(),
),
),
make_controlling_menu_item("master volume", Slider::new(AUDIO_SETTINGS.master_volume.clone())),
make_controlling_menu_item("effect volume", Slider::new(AUDIO_SETTINGS.effect_volume.clone())),
make_controlling_menu_item("music volume", Slider::new(AUDIO_SETTINGS.music_volume.clone())),
make_controlling_menu_item("voice volume", Slider::new(AUDIO_SETTINGS.voice_volume.clone())),
];
let l = items_hovereds.len();
let (items, hovereds): (Vec<_>, Vec<_>) = items_hovereds.into_iter().unzip();
let hovereds = MutableVec::new_with_values(hovereds);
menu_base(SUB_MENU_WIDTH, SUB_MENU_HEIGHT, "audio menu")
.apply(|element| focus_on_no_child_hovered(element, hovereds.signal_vec_cloned()))
.apply(|element| sub_menu_child_hover_manager(element, hovereds.clone()))
.items(
items
.into_iter()
.enumerate()
.map(move |(i, item)| item.z_index(ZIndex::Local((l - i) as i32))),
)
}
fn graphics_menu() -> Column<NodeBundle> {
let preset_quality = GRAPHICS_SETTINGS.preset_quality.clone();
let texture_quality = GRAPHICS_SETTINGS.texture_quality.clone();
let shadow_quality = GRAPHICS_SETTINGS.shadow_quality.clone();
let bloom_quality = GRAPHICS_SETTINGS.bloom_quality.clone();
let non_preset_qualities = MutableVec::new_with_values(vec![
texture_quality.clone(),
shadow_quality.clone(),
bloom_quality.clone(),
]);
let preset_broadcaster = spawn(clone!((preset_quality, non_preset_qualities) async move {
preset_quality.signal()
.for_each_sync(|preset_quality_option| {
if let Some(preset_quality) = preset_quality_option {
for quality in non_preset_qualities.lock_ref().iter() {
quality.set_neq(Some(preset_quality));
}
}
})
.await;
}));
let preset_controller = spawn(clone!((preset_quality) async move {
non_preset_qualities.signal_vec_cloned()
.map_signal(|quality| quality.signal())
.to_signal_map(|qualities| {
let mut qualities = qualities.iter();
let mut preset = preset_quality.lock_mut();
if preset.is_none() {
let first = qualities.next().unwrap(); // always populated
if qualities.all(|quality| quality == first) {
*preset = *first;
}
} else if preset.is_some() && qualities.any(|quality| quality != &*preset) {
*preset = None;
}
})
.to_future()
.await;
}));
let items = [
("preset quality", preset_quality, true),
("texture quality", texture_quality, false),
("shadow quality", shadow_quality, false),
("bloom quality", bloom_quality, false),
];
let l = items.len();
let hovereds = MutableVec::new_with_values((0..l).map(|_| Mutable::new(false)).collect::<Vec<_>>());
menu_base(SUB_MENU_WIDTH, SUB_MENU_HEIGHT, "graphics menu")
.apply(|element| focus_on_no_child_hovered(element, hovereds.signal_vec_cloned()))
.apply(|element| sub_menu_child_hover_manager(element, hovereds.clone()))
.update_raw_el(|raw_el| raw_el.hold_tasks([preset_broadcaster, preset_controller]))
.items({
let hovereds = hovereds.lock_ref().iter().cloned().collect::<Vec<_>>();
items
.into_iter()
.zip(hovereds)
.enumerate()
.map(move |(i, ((label, quality, clearable), hovered))| {
menu_item(
label,
{
Dropdown::new(
MutableVec::new_with_values(Quality::iter().collect()),
quality,
clearable,
)
.controlling_signal(hovered.signal())
},
hovered,
)
.z_index(ZIndex::Local((l - i) as i32))
})
})
.item(
// solely here to dehover dropdown menu items // TODO: this can also be solved by
// allowing setting Over/Out order at runtime or implementing .on_hovered_outside, i
// should do both of these
El::<NodeBundle>::new()
.height(Val::Px(
SUB_MENU_HEIGHT - (l + 1) as f32 * MENU_ITEM_HEIGHT - BASE_PADDING * 2.,
))
.on_hovered_change(|is_hovered| {
if is_hovered {
if let Some(hovered) = MENU_ITEM_HOVERED_OPTION.take() {
hovered.set(false);
}
}
}),
)
}Sourcefn hovered_sync(self, hovered: Mutable<bool>) -> Self
fn hovered_sync(self, hovered: Mutable<bool>) -> Self
Sync a Mutable<bool> with this element’s hovered state.
Examples found in repository?
examples/responsive_menu.rs (line 104)
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
fn nine_slice_button() -> impl Element {
let hovered = Mutable::new(false);
let pressed = Mutable::new(false);
NineSliceEl::new(map_ref! {
let hovered = hovered.signal(),
let pressed = pressed.signal() => {
if *pressed {
2
} else if *hovered {
1
} else {
0
}
}
})
.width(Val::Px(100.))
.height(Val::Px(50.))
.hovered_sync(hovered)
.pressed_sync(pressed)
}More examples
examples/counter.rs (line 55)
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
fn counter_button(counter: Mutable<i32>, label: &str, step: i32) -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.width(Val::Px(45.0))
.align_content(Align::center())
.background_color_signal(
hovered
.signal()
.map_bool(|| Color::hsl(300., 0.75, 0.85), || Color::hsl(300., 0.75, 0.75))
.map(BackgroundColor),
)
.hovered_sync(hovered)
.on_click(move || *counter.lock_mut() += step)
.child(El::<TextBundle>::new().text(text(label)))
}examples/ecs_ui_sync.rs (line 126)
111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
fn incrde_button(value: Mutable<f32>, incr: f32) -> impl Element {
let hovered = Mutable::new(false);
let f = move || {
let new = (*value.lock_ref() + incr).max(0.);
*value.lock_mut() = new;
};
El::<NodeBundle>::new()
.width(Val::Px(45.0))
.align_content(Align::center())
.background_color_signal(
hovered
.signal()
.map_bool(|| Color::hsl(300., 0.75, 0.85), || Color::hsl(300., 0.75, 0.75))
.map(BackgroundColor),
)
.hovered_sync(hovered)
.on_pressing_with_sleep_throttle(f, Duration::from_millis(50))
.child(El::<TextBundle>::new().text(text(if incr.is_sign_positive() { "+" } else { "-" })))
}examples/snake.rs (line 208)
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
fn restart_button() -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.align(Align::center())
.width(Val::Px(250.))
.height(Val::Px(80.))
.background_color_signal(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::GRAY.into(), || Color::BLACK)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.align_content(Align::center())
.on_click(|| async_world().send_event(Restart).apply(spawn).detach())
.child(El::<TextBundle>::new().text(Text::from_section(
"restart",
TextStyle {
font_size: 60.,
color: Color::WHITE,
..default()
},
)))
}
fn text(string: &str) -> Text {
Text::from_section(
string,
TextStyle {
font_size: 30.,
..default()
},
)
}
#[derive(Event)]
enum GridSizeChange {
Incr,
Decr,
}
// TODO: move this back inside the on_click ? (initial motivation for moving to event was
// potentially addressing the grid float precision shenanigans)
fn grid_size_changer(mut events: EventReader<GridSizeChange>, mut spawn_food: EventWriter<SpawnFood>) {
for event in events.read() {
let cur_size = GRID_SIZE.get();
match event {
GridSizeChange::Incr => {
let mut cells_lock = CELLS.lock_mut();
for i in 0..cur_size + 1 {
cells_lock.insert_cloned((i, cur_size), Mutable::new(Cell::Empty));
cells_lock.insert_cloned((cur_size, i), Mutable::new(Cell::Empty));
}
GRID_SIZE.update(|size| size + 1);
}
GridSizeChange::Decr => {
if cur_size > 2 {
let mut cells_lock = CELLS.lock_mut();
let indices = (0..cur_size)
.map(|i| (i, cur_size - 1))
.chain((0..cur_size).map(|i| (cur_size - 1, i)))
.collect::<Vec<_>>();
if indices.iter().all(|index| {
cells_lock
.get(index)
.map(|cell| !matches!(cell.get(), Cell::Snake))
.unwrap_or(false)
}) {
let mut removed = vec![];
for index in indices {
removed.push(cells_lock.remove(&index));
}
if removed
.into_iter()
.flatten()
.any(|removed| matches!(removed.get(), Cell::Food))
{
spawn_food.send_default();
}
GRID_SIZE.update(|size| size - 1);
}
}
}
}
}
}
fn text_button(text_: &str) -> impl Element + PointerEventAware {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.width(Val::Px(45.0))
.align_content(Align::center())
.background_color_signal(
hovered
.signal()
.map_bool(|| SNAKE_COLOR, || EMPTY_COLOR)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.child(El::<TextBundle>::new().text(text(text_)))
}examples/healthbar.rs (line 230)
218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
fn respawn_button() -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.align(Align::center())
.width(Val::Px(250.))
.height(Val::Px(80.))
.background_color_signal(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::GRAY.into(), || Color::BLACK)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.align_content(Align::center())
.on_click(|| async_world().send_event(SpawnPlayer).apply(spawn).detach())
.child(El::<TextBundle>::new().text(Text::from_section(
"respawn",
TextStyle {
font_size: 60.,
color: Color::WHITE,
..default()
},
)))
}examples/scroll.rs (line 53)
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
fn letter_column(rotate: usize, color: Color) -> impl Element {
let hovered = Mutable::new(false);
Column::<NodeBundle>::new()
.height(Val::Px(5. * LETTER_SIZE))
.mutable_viewport(Overflow::clip_y(), LimitToBody::Vertical)
.on_scroll_with_system_disableable_signal(
BasicScrollHandler::new()
.direction(ScrollDirection::Vertical)
.pixels(LETTER_SIZE)
.into_system(),
signal::or(signal::not(hovered.signal()), SHIFTED.signal()),
)
.with_style(move |mut style| style.top = Val::Px(-LETTER_SIZE * rotate as f32))
.hovered_sync(hovered)
.items(
"abcdefghijklmnopqrstuvwxyz"
.chars()
.map(move |c| letter(&c.to_string(), color)),
)
}
fn ui_root() -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.align_content(Align::center())
.child(
Row::<NodeBundle>::new()
.with_style(|mut style: Mut<'_, Style>| {
style.column_gap = Val::Px(30.);
style.padding = UiRect::horizontal(Val::Px(7.5));
})
.width(Val::Px(300.))
.mutable_viewport(Overflow::clip_x(), LimitToBody::Horizontal)
.on_scroll_with_system_disableable_signal(
BasicScrollHandler::new()
.direction(ScrollDirection::Horizontal)
// TODO: special handler for auto discrete like rectray https://github.com/mintlu8/bevy-rectray/blob/main/examples/scroll_discrete.rs
.pixels(63.)
.into_system(),
signal::not(signal::and(hovered.signal(), SHIFTED.signal())),
)
.hovered_sync(hovered)
.items(
[
bevy::color::palettes::css::RED,
bevy::color::palettes::css::ORANGE,
bevy::color::palettes::css::YELLOW,
bevy::color::palettes::css::GREEN,
bevy::color::palettes::css::BLUE,
bevy::color::palettes::css::INDIGO,
bevy::color::palettes::css::VIOLET,
]
.into_iter()
.enumerate()
.map(|(i, color)| letter_column(i, color.into())),
),
)
}Sourcefn on_click_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static,
) -> Self
fn on_click_with_system<Marker>( self, handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static, ) -> Self
Run a System when this element is clicked.
Examples found in repository?
examples/key_values_sorted.rs (lines 416-435)
373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439
fn ui_root() -> impl Element {
El::<NodeBundle>::new()
.ui_root()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.align_content(Align::center())
.child(
Row::<NodeBundle>::new()
.height(Val::Percent(100.))
.with_style(|mut style| style.column_gap = Val::Px(70.))
.item(
Column::<NodeBundle>::new()
.with_style(|mut style| style.row_gap = Val::Px(20.))
.item(sort_button(KeyValue::Key))
.item(sort_button(KeyValue::Value)),
)
.item(
Column::<NodeBundle>::new()
.with_style(|mut style| style.row_gap = Val::Px(10.))
.height(Val::Percent(90.))
.width(Val::Px(INPUT_WIDTH * 2. + INPUT_HEIGHT + 10. * 2.))
.align_content(Align::center())
.item(key_values().height(Val::Percent(90.)))
.item({
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.width(Val::Px(INPUT_WIDTH))
.height(Val::Px(INPUT_HEIGHT))
.background_color_signal(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::GREEN.into(), || *DARK_GRAY)
.map(BackgroundColor::from),
)
.hovered_sync(hovered)
.align_content(Align::center())
.child(El::<TextBundle>::new().text(Text::from_section(
"+",
TextStyle {
font_size: 30.0,
..default()
},
)))
.on_click_with_system(|_: In<_>, mut commands: Commands| {
commands.remove_resource::<FocusedTextInput>(); // TODO: shouldn't need this, can remove once https://github.com/Dimchikkk/bevy_cosmic_edit/issues/145
clear_focus();
PAIRS.lock_mut().push_cloned(RowData {
key: {
let data = TextInputData::new("");
data.focus.set(true);
data
},
value: TextInputData::new(""),
});
async {
// TODO: need "after rendered" hook to exactly sync when this scroll should be
// triggered
sleep(Duration::from_millis(25)).await;
scroll_to_bottom()
}
.apply(spawn)
.detach();
})
}),
),
)
}Sourcefn on_click(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
fn on_click(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
Run a function when this element is left clicked.
Examples found in repository?
examples/main_menu.rs (line 179)
172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840
fn text_button(
text_signal: impl Signal<Item = String> + Send + 'static,
on_click: impl FnMut() + Send + Sync + 'static,
) -> Button {
Button::new()
.width(Val::Px(200.))
.body(El::<TextBundle>::new().text_signal(text_signal.map(text)))
.on_click(on_click)
}
fn sub_menu_button(sub_menu: SubMenu) -> Button {
text_button(always(sub_menu.to_string()), move || {
SHOW_SUB_MENU.set_neq(Some(sub_menu))
})
}
fn menu_base(width: f32, height: f32, title: &str) -> Column<NodeBundle> {
Column::<NodeBundle>::new()
.width(Val::Px(width))
.height(Val::Px(height))
.with_style(|mut style| style.border = UiRect::all(Val::Px(BASE_BORDER_WIDTH)))
.border_color(BorderColor(Color::BLACK))
.background_color(BackgroundColor(NORMAL_BUTTON))
.item(
El::<NodeBundle>::new()
.height(Val::Px(MENU_ITEM_HEIGHT))
.with_style(|mut style| {
style.padding = UiRect::all(Val::Px(BASE_PADDING * 2.));
})
.child(
El::<TextBundle>::new()
.align(Align::new().top().left())
.text(text(title)),
),
)
}
// global ui state comes in super handy sometimes ...
// here, we use a global to keep track of any dropdowns that are dropped down, passing it to
// `only_one_up_flipper` to ensure only one is dropped down at a time; a mutable for this can be
// managed more locally, but adds significant unwieldiness
static DROPDOWN_SHOWING_OPTION: Lazy<Mutable<Option<Mutable<bool>>>> = Lazy::new(default);
fn lil_baby_button() -> Button {
Button::new()
.width(Val::Px(LIL_BABY_BUTTON_SIZE))
.height(Val::Px(LIL_BABY_BUTTON_SIZE))
}
trait Controllable: ElementWrapper
where
Self: Sized + 'static,
{
fn controlling(&self) -> &Mutable<bool>;
fn controlling_signal(mut self, controlling_signal: impl Signal<Item = bool> + Send + 'static) -> Self {
let syncer = spawn(sync(controlling_signal, self.controlling().clone()));
self = self.update_raw_el(|raw_el| raw_el.hold_tasks([syncer]));
self
}
}
struct Checkbox {
el: Button,
controlling: Mutable<bool>,
}
impl Checkbox {
fn new(checked: Mutable<bool>) -> Self {
let (controlling, controlling_signal) = Mutable::new_and_signal(false);
Self {
el: {
lil_baby_button()
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
// input handling is conveniently defined within the body of the widget itself
input_event_listener_controller(
element,
controlling_signal,
clone!((checked) move || {
// TODO: i don't actually need the exclusivity of `run` here, is there a way to avoid it ?
On::<MenuInputEvent>::run(clone!((checked) move |event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Select => {
checked.set_neq(!checked.get());
},
MenuInput::Delete => {
checked.set(false);
},
_ => ()
}
}))
}),
)
})
.on_click(clone!((checked) move || flip(&checked)))
.selected_signal(checked.signal())
},
controlling,
}
}
}
impl ElementWrapper for Checkbox {
type EL = Button;
fn element_mut(&mut self) -> &mut Self::EL {
&mut self.el
}
}
impl Controllable for Checkbox {
fn controlling(&self) -> &Mutable<bool> {
&self.controlling
}
}
#[derive(Clone, Copy, EnumIter, PartialEq, Display)]
enum Quality {
Low,
Medium,
High,
Ultra,
}
struct RadioGroup {
el: Row<NodeBundle>,
controlling: Mutable<bool>,
}
impl RadioGroup {
fn new<T: Clone + PartialEq + Display + Send + Sync + 'static>(
options: MutableVec<T>,
selected: Mutable<Option<usize>>,
) -> Self {
let (controlling, controlling_signal) = Mutable::new_and_signal(false);
Self {
el: {
Row::<NodeBundle>::new()
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
input_event_listener_controller(
element,
controlling_signal,
clone!((options, selected) move || {
On::<MenuInputEvent>::run(clone!((options, selected) move |event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Left | MenuInput::Right => {
let selected_option = selected.lock_ref().as_ref().copied();
let (mut i, step) = {
if matches!(event.input, MenuInput::Left) {
(selected_option.unwrap_or(options.lock_ref().len() - 1) as isize, -1)
} else {
(selected_option.unwrap_or(0) as isize, 1)
}
};
if selected_option.is_some() {
i = (i + step + options.lock_ref().len() as isize) % options.lock_ref().len() as isize;
}
selected.set(Some(i as usize));
},
MenuInput::Delete => {
selected.take();
},
_ => ()
}
}))
})
)
})
.items_signal_vec(
options.signal_vec_cloned().enumerate()
.map(clone!((selected) move |(i_option_mutable, option)| {
text_button(
always(option.to_string()),
clone!((selected, i_option_mutable) move || {
if selected.get() == i_option_mutable.get() {
selected.set(None);
} else {
selected.set(i_option_mutable.get());
}
})
)
// the `Checkbox` just used a flippable `Mutable<bool>` to persist the selectedness, and we could
// have done the same here, e.g. a separate `clicked: Mutable<bool>` for every text button, but then to
// get exclusivity we would have iterate over the other `clicked` mutables and flip them; again, this
// is a totally valid option, but it's more convenient in this case to centrally track selectedness
// with a `Mutable<Option<usize>>` so we get exclusivity for free; also notice that the index from the
// `.enumerate` is a mutable, this is because the options vec is also reactive, so the indicies of items
// can change, so this solution isn't actually correct for dynamic options, but it's fine for this example
.selected_signal(signal_eq(selected.signal_cloned(), i_option_mutable.signal()))
}))
)
},
controlling,
}
}
}
impl ElementWrapper for RadioGroup {
type EL = Row<NodeBundle>;
fn element_mut(&mut self) -> &mut Self::EL {
&mut self.el
}
}
impl Controllable for RadioGroup {
fn controlling(&self) -> &Mutable<bool> {
&self.controlling
}
}
enum LeftRight {
Left,
Right,
}
fn centered_arrow_text(direction: LeftRight) -> El<TextBundle> {
El::<TextBundle>::new()
.with_style(|mut style| {
// manually centered
style.bottom = Val::Px(2.);
style.right = Val::Px(2.);
})
.text(
match direction {
LeftRight::Left => "<",
LeftRight::Right => ">",
}
.apply(text),
)
}
struct IterableOptions {
el: Row<NodeBundle>,
controlling: Mutable<bool>,
}
const FLASH_MS: f32 = 50.; // TODO: address background/border color desyncing
impl IterableOptions {
fn new<T: Clone + PartialEq + Display + Send + Sync + 'static>(
options: MutableVec<T>,
selected: Mutable<T>,
) -> Self {
let (controlling, controlling_signal) = Mutable::new_and_signal(false);
let left_pressed = Mutable::new(false);
let right_pressed = Mutable::new(false);
Self {
el: {
Row::<NodeBundle>::new()
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
input_event_listener_controller(
element,
controlling_signal,
clone!((options, selected, left_pressed, right_pressed) move || {
// TODO: only allowing one flasher like this doesn't prevent desyncing either ...
let left_flasher = Mutable::new(None);
let right_flasher = Mutable::new(None);
On::<MenuInputEvent>::run(clone!((options, selected, left_pressed, right_pressed) move |event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Left | MenuInput::Right => {
let i_option = options.lock_ref().iter().position(|option| option == &*selected.lock_ref()).map(|i| i as isize);
if let Some(mut i) = i_option {
let step = {
(if matches!(event.input, MenuInput::Left) {
left_pressed.set(true);
left_flasher.set(Some(spawn(clone!((left_pressed) async move {
sleep(Duration::from_millis(FLASH_MS as u64)).await;
left_pressed.signal().wait_for(true).await; // TODO: this doesn't prevent desyncing, could be lower level issue ...
left_pressed.set(false);
}))));
-1
} else {
right_pressed.set(true);
right_flasher.set(Some(spawn(clone!((right_pressed) async move {
sleep(Duration::from_millis(FLASH_MS as u64)).await;
right_pressed.signal().wait_for(true).await;
right_pressed.set(false);
}))));
1
})
as isize
};
i = (i + step + options.lock_ref().len() as isize) % options.lock_ref().len() as isize;
selected.set(options.lock_ref()[i as usize].clone());
}
},
_ => ()
}
}))
})
)
})
.with_style(|mut style| style.column_gap = Val::Px(BASE_PADDING * 2.))
.item({
lil_baby_button()
.selected_signal(left_pressed.signal())
.on_click(clone!((selected, options) move || {
let options_lock = options.lock_ref();
if let Some(i) = options_lock.iter().position(|option| option == &*selected.lock_ref()) {
selected.set_neq(options_lock.iter().rev().cycle().nth(options_lock.len() - i).unwrap().clone());
}
}))
.body(centered_arrow_text(LeftRight::Left))
})
.item(
El::<TextBundle>::new()
.text_signal(selected.signal_cloned().map(text))
)
.item({
lil_baby_button()
.selected_signal(right_pressed.signal())
.on_click(clone!((selected, options) move || {
let options_lock = options.lock_ref();
if let Some(i) = options_lock.iter().position(|option| option == &*selected.lock_ref()) {
selected.set_neq(options_lock.iter().cycle().nth(i + 1).unwrap().clone());
}
}))
.body(centered_arrow_text(LeftRight::Right))
})
},
controlling,
}
}
}
impl ElementWrapper for IterableOptions {
type EL = Row<NodeBundle>;
fn element_mut(&mut self) -> &mut Self::EL {
&mut self.el
}
}
impl Controllable for IterableOptions {
fn controlling(&self) -> &Mutable<bool> {
&self.controlling
}
}
struct Slider {
el: Row<NodeBundle>,
controlling: Mutable<bool>,
}
impl Slider {
fn new(value: Mutable<f32>) -> Self {
let (controlling, controlling_signal) = Mutable::new_and_signal(false);
Self {
el: {
let slider_width = 400.;
let slider_padding = 5.;
let max = slider_width - slider_padding - LIL_BABY_BUTTON_SIZE - BASE_BORDER_WIDTH;
let left = Mutable::new(value.get() / 100. * max);
let value_setter = spawn(clone!((left, value) async move {
left.signal().for_each_sync(|left| value.set_neq(left / max * 100.)).await;
}));
Row::<NodeBundle>::new()
.update_raw_el(|raw_el| raw_el.insert(SliderTag))
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
input_event_listener_controller(
element,
controlling_signal,
clone!((left) move || {
On::<MenuInputEvent>::run(clone!((left) move |event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Left | MenuInput::Right => {
let dir = if matches!(event.input, MenuInput::Left) { -1. } else { 1. };
left.update(move |left| (left + dir * max * 0.001).max(0.).min(max));
},
_ => ()
}
}))
}),
)
})
.update_raw_el(|raw_el| raw_el.hold_tasks([value_setter]))
.with_style(|mut style| style.column_gap = Val::Px(10.))
.item(
El::<TextBundle>::new().text_signal(value.signal().map(|value| text(format!("{:.1}", value)))),
)
.item(
Stack::<NodeBundle>::new()
.width(Val::Px(slider_width))
.height(Val::Px(5.))
.with_style(move |mut style| style.padding = UiRect::horizontal(Val::Px(slider_padding)))
.background_color(BackgroundColor(Color::BLACK))
.layer({
let dragging = Mutable::new(false);
lil_baby_button()
.selected_signal(dragging.signal())
.el // we need lower level access now
.on_signal_with_style(left.signal(), |mut style, left| style.left = Val::Px(left))
.align(Align::new().center_y())
.update_raw_el(|raw_el| {
raw_el.insert((
On::<Pointer<DragStart>>::run(
clone!((dragging) move || dragging.set_neq(true)),
),
On::<Pointer<DragEnd>>::run(move || dragging.set_neq(false)),
On::<Pointer<Drag>>::run(move |drag: Listener<Pointer<Drag>>| {
left.set_neq((left.get() + drag.delta.x).max(0.).min(max));
}),
))
})
}),
)
},
controlling,
}
}
}
impl ElementWrapper for Slider {
type EL = Row<NodeBundle>;
fn element_mut(&mut self) -> &mut Self::EL {
&mut self.el
}
}
impl Controllable for Slider {
fn controlling(&self) -> &Mutable<bool> {
&self.controlling
}
}
fn options(n: usize) -> Vec<String> {
(1..=n).map(|i| format!("option {}", i)).collect()
}
fn only_one_up_flipper(
to_flip: &Mutable<bool>,
already_up_option: &Mutable<Option<Mutable<bool>>>,
target_option: Option<bool>,
) {
let cur = target_option.map(|target| !target).unwrap_or(to_flip.get());
if cur {
already_up_option.take();
} else {
if let Some(previous) = &*already_up_option.lock_ref() {
previous.set(false);
}
already_up_option.set(Some(to_flip.clone()));
}
to_flip.set(!cur);
}
static MENU_ITEM_HOVERED_OPTION: Lazy<Mutable<Option<Mutable<bool>>>> = Lazy::new(default);
fn menu_item(label: &str, body: impl Element, hovered: Mutable<bool>) -> Stack<NodeBundle> {
Stack::<NodeBundle>::new()
.background_color_signal(
hovered
.signal()
.map_bool(|| NORMAL_BUTTON.lighter(0.05), || NORMAL_BUTTON)
.map(BackgroundColor),
)
.on_hovered_change(move |is_hovered| only_one_up_flipper(&hovered, &MENU_ITEM_HOVERED_OPTION, Some(is_hovered)))
.width(Val::Percent(100.))
.height(Val::Px(MENU_ITEM_HEIGHT))
.with_style(|mut style| style.padding = UiRect::axes(Val::Px(BASE_PADDING), Val::Px(BASE_PADDING / 2.)))
.layer(
El::<TextBundle>::new()
.text(text(label))
.align(Align::new().left().center_y()),
)
.layer(body.align(Align::new().right().center_y()))
}
struct Dropdown {
el: El<NodeBundle>,
controlling: Mutable<bool>,
}
fn focus_on_signal<E: Element>(element: E, signal: impl Signal<Item = bool> + Send + 'static) -> E {
element.update_raw_el(|raw_el| {
raw_el.on_signal(signal.dedupe(), |entity, focus| async move {
if focus {
// at first, i was using a `static_ref` global `Mutable<Option<Entity>>` for this
// and wrapping it in a resource for accessing it in the menu input event systems, but this is an
// anti pattern; the ecs should not be polling reactive ui state for syncing its own
// state/systems (there's an example of this anti pattern in the ecs world ui world sync example https://github.com/databasedav/haalka/blob/main/examples/ecs_ui_sync/src/main.rs#L154);
// instead, like we do here, simply use the `async_world` to update the ecs state *exactly and only*
// when it needs to be
async_world().insert_resource(FocusedEntity(entity)).await;
// TODO: remove reference to ecs world ui world sync example once fixed
}
})
})
}
impl Dropdown {
fn new<T: Clone + PartialEq + Display + Send + Sync + 'static>(
options: MutableVec<T>,
selected: Mutable<Option<T>>,
clearable: bool,
) -> Self {
let show_dropdown = Mutable::new(false);
let hovered = Mutable::new(false);
let controlling = Mutable::new(false);
let options_hovered =
MutableVec::new_with_values((0..options.lock_ref().len()).map(|_| Mutable::new(false)).collect());
let el = {
El::<NodeBundle>::new()
.apply(|element| focus_on_signal(element, controlling.signal()))
.apply(|element| {
input_event_listener_controller(
element,
controlling.signal(),
clone!((show_dropdown, hovered, options, options_hovered, selected) move || {
On::<MenuInputEvent>::run(clone!((show_dropdown, hovered, options, options_hovered, selected) move |mut event: ListenerMut<MenuInputEvent>| {
match event.input {
MenuInput::Up | MenuInput::Down => {
if show_dropdown.get() {
event.stop_propagation();
let hovered_option = options_hovered.lock_ref().iter().position(|hovered| hovered.get());
if let Some(i) = hovered_option {
options_hovered.lock_ref()[i].set(false);
}
let (mut i, step) = {
if matches!(event.input, MenuInput::Up) {
(hovered_option.unwrap_or(options.lock_ref().len() - 1) as isize, -1)
} else {
(hovered_option.unwrap_or(0) as isize, 1)
}
};
if hovered_option.is_some() || (selected.lock_ref().is_some() && Some(&options.lock_ref()[i as usize]) == selected.lock_ref().as_ref()) {
for _ in 0..options.lock_ref().len() {
i = (i + step + options.lock_ref().len() as isize) % options.lock_ref().len() as isize;
if Some(&options.lock_ref()[i as usize]) != selected.lock_ref().as_ref() {
break;
}
}
}
options_hovered.lock_ref()[i as usize].set(true);
} else {
hovered.set_neq(false);
}
}
MenuInput::Select => {
hovered.set_neq(!show_dropdown.get());
let hovered_option = options_hovered.lock_ref().iter().position(|hovered| hovered.get());
if let Some(i) = hovered_option {
options_hovered.lock_ref()[i].set(false);
selected.set_neq(Some(options.lock_ref()[i].clone()));
}
flip(&show_dropdown);
for hovered in options_hovered.lock_ref().iter() {
hovered.set(false);
}
},
MenuInput::Back => {
if show_dropdown.get() {
event.stop_propagation();
for hovering in options_hovered.lock_ref().iter() {
hovering.set(false);
}
flip(&show_dropdown);
}
hovered.set(false);
},
MenuInput::Delete => {
if clearable {
selected.take();
}
},
_ => ()
}
}))
})
)
})
.child(
Button::new()
.width(Val::Px(300.))
.hovered_signal(hovered.signal())
.body(
Stack::<NodeBundle>::new()
.width(Val::Percent(100.))
.with_style(|mut style| style.padding = UiRect::horizontal(Val::Px(BASE_PADDING)))
.layer(
El::<TextBundle>::new()
.align(Align::new().left())
.text_signal(
selected.signal_cloned()
.map(|selected_option| {
selected_option.map(|option| option.to_string()).unwrap_or_default()
})
.map(text)
)
)
.layer(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(BASE_PADDING))
.align(Align::new().right())
.item_signal(
// TODO: this should just work, but compiler asks for type info
// clearable.then(||
// selected.signal_ref(Option::is_some).dedupe()
// .map_true(clone!((selected) move || x_button(clone!((selected) move || { selected.take(); }))))
// )
if clearable {
selected.signal_ref(Option::is_some).dedupe()
.map_true(clone!((selected) move || x_button(clone!((selected) move || { selected.take(); }))))
.boxed()
} else {
always(None).boxed()
}
)
.item(
El::<TextBundle>::new()
// TODO: need to figure out to rotate in place (around center)
// .on_signal_with_transform(show_dropdown.signal(), |transform, showing| {
// transform.rotate_around(Vec3::X, Quat::from_rotation_z((if showing { 180.0f32 } else { 0. }).to_radians()));
// })
.text(text("v"))
)
)
)
.on_click(clone!((show_dropdown) move || {
only_one_up_flipper(&show_dropdown, &DROPDOWN_SHOWING_OPTION, None);
}))
)
// TODO: this should be element below signal
.child_signal(
show_dropdown.signal()
.map_true(clone!((options, show_dropdown, selected) move || {
Column::<NodeBundle>::new()
.width(Val::Percent(100.))
.with_style(|mut style| {
style.position_type = PositionType::Absolute;
style.top = Val::Percent(100.);
})
.items_signal_vec(
options.signal_vec_cloned()
.enumerate()
.filter_signal_cloned(clone!((selected) move |(_, option)| {
selected.signal_ref(clone!((option) move |selected_option| {
selected_option.as_ref() != Some(&option)
}))
.dedupe()
}))
.map_signal(clone!((selected, show_dropdown, options_hovered) move |(i_mutable, option)| {
i_mutable.signal()
.map_some(clone!((options_hovered, selected, show_dropdown, option) move |i| {
if let Some(hovered) = options_hovered.lock_ref().get(i) {
text_button(
always(option.to_string()),
clone!((selected, show_dropdown, option) move || {
selected.set_neq(Some(option.clone()));
flip(&show_dropdown);
})
)
.width(Val::Percent(100.))
.hovered_signal(hovered.signal())
.apply(Some)
} else {
None
}
}))
}))
.map(Option::flatten)
)
}))
)
};
Self { el, controlling }
}More examples
examples/counter.rs (line 56)
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
fn counter_button(counter: Mutable<i32>, label: &str, step: i32) -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.width(Val::Px(45.0))
.align_content(Align::center())
.background_color_signal(
hovered
.signal()
.map_bool(|| Color::hsl(300., 0.75, 0.85), || Color::hsl(300., 0.75, 0.75))
.map(BackgroundColor),
)
.hovered_sync(hovered)
.on_click(move || *counter.lock_mut() += step)
.child(El::<TextBundle>::new().text(text(label)))
}examples/snake.rs (line 210)
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219
fn restart_button() -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.align(Align::center())
.width(Val::Px(250.))
.height(Val::Px(80.))
.background_color_signal(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::GRAY.into(), || Color::BLACK)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.align_content(Align::center())
.on_click(|| async_world().send_event(Restart).apply(spawn).detach())
.child(El::<TextBundle>::new().text(Text::from_section(
"restart",
TextStyle {
font_size: 60.,
color: Color::WHITE,
..default()
},
)))
}examples/healthbar.rs (line 232)
218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
fn respawn_button() -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.align(Align::center())
.width(Val::Px(250.))
.height(Val::Px(80.))
.background_color_signal(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::GRAY.into(), || Color::BLACK)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.align_content(Align::center())
.on_click(|| async_world().send_event(SpawnPlayer).apply(spawn).detach())
.child(El::<TextBundle>::new().text(Text::from_section(
"respawn",
TextStyle {
font_size: 60.,
color: Color::WHITE,
..default()
},
)))
}examples/calculator.rs (lines 73-86)
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
fn input_button(symbol: &'static str) -> impl Element {
let hovered = Mutable::new(false);
button(symbol)
.cursor(CursorIcon::Pointer)
.background_color_signal(hovered.signal().map_bool(|| BLUE, || PINK).map(BackgroundColor))
.hovered_sync(hovered)
.on_click(move || {
let mut output = OUTPUT.lock_mut();
if symbol == "=" {
if let Ok(result) = Context::<f64>::default().evaluate(&output) {
if let Some(result) = Decimal::from_f64((result * 100.).round() / 100.) {
*output = result.normalize().to_string();
return;
}
}
ERROR.set_neq(true);
} else {
*output += symbol;
}
})
}
static OUTPUT: Lazy<Mutable<String>> = Lazy::new(default);
static ERROR: Lazy<Mutable<bool>> = Lazy::new(default);
fn display() -> impl Element {
textable_element(OUTPUT.signal_cloned())
.with_style(|mut style| {
style.padding = UiRect::all(Val::Px(GAP));
style.overflow = Overflow::clip();
})
.update_raw_el(|raw_el| {
raw_el.component_signal::<Outline, _>(
ERROR
.signal()
.map_true(|| Outline::new(Val::Px(4.0), Val::ZERO, bevy::color::palettes::basic::RED.into())),
)
})
.width(Val::Px(BUTTON_SIZE * 3. + GAP * 2.))
.height(Val::Px(BUTTON_SIZE))
.background_color(BackgroundColor(BLUE))
.align_content(Align::new().right().center_y())
}
fn clear_button() -> impl Element {
let hovered = Mutable::new(false);
let output_empty = OUTPUT.signal_ref(String::is_empty).broadcast();
button("c")
.background_color_signal(
map_ref! {
let output_empty = output_empty.signal(),
let hovered = hovered.signal() => {
if *output_empty {
BLUE
} else if *hovered {
bevy::color::palettes::basic::RED.into()
} else {
PINK
}
}
}
.dedupe()
.map(BackgroundColor),
)
.cursor_disableable_signal(CursorIcon::Pointer, output_empty.signal())
.hovered_sync(hovered)
.on_click(|| OUTPUT.lock_mut().clear())
}examples/align.rs (line 83)
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
fn alignment_button(alignment: Alignment) -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.align(Align::center())
.width(Val::Px(250.))
.height(Val::Px(80.))
.background_color_signal(
signal::or(
hovered.signal(),
ALIGNMENT
.signal()
.map(move |other_alignment| alignment == other_alignment),
)
.map_bool(|| bevy::color::palettes::basic::GRAY.into(), || Color::BLACK)
.map(BackgroundColor),
)
.hovered_sync(hovered)
.align_content(Align::center())
.on_click(move || ALIGNMENT.set(alignment))
.child(El::<TextBundle>::new().text(text(
match alignment {
Alignment::Self_ => "align self",
Alignment::Content => "align content",
},
30.,
)))
}
fn ui_root() -> impl Element {
Column::<NodeBundle>::new()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.with_style(|mut style| style.row_gap = Val::Px(15.))
.align_content(Align::center())
.align(Align::center())
.item(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(15.))
.item(container("Column", Column::<NodeBundle>::new().items(rectangles())))
.item(container("El", El::<NodeBundle>::new().child(rectangle(1))))
// TODO: is this align content behavior buggy?
.item(container("Grid", Grid::<NodeBundle>::new().cells(rectangles()))),
)
.item(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(15.))
.item(
Column::<NodeBundle>::new()
.with_style(|mut style| style.row_gap = Val::Px(15.))
.item(alignment_button(Alignment::Self_))
.item(alignment_button(Alignment::Content)),
)
.item(
Stack::<NodeBundle>::new()
.layers(RectangleAlignment::iter().map(align_switcher))
.apply(container_style),
),
)
.item(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(15.))
.item(container("Row", Row::<NodeBundle>::new().items(rectangles())))
// TODO: is this align content behavior buggy?
.item(container("Stack", Stack::<NodeBundle>::new().layers(rectangles()))),
)
}
fn container_style<E: RawElWrapper + Sizeable>(el: E) -> E {
el.width(Val::Px(278.)).height(Val::Px(200.)).update_raw_el(|raw_el| {
raw_el
.insert::<BorderColor>(bevy::color::palettes::basic::GRAY.into())
.with_component::<Style>(|mut style| {
style.border = UiRect::all(Val::Px(3.));
})
})
}
fn text(text: &str, font_size: f32) -> Text {
Text::from_section(text, TextStyle { font_size, ..default() })
}
fn container(name: &str, element: impl Element + Sizeable) -> impl Element {
Column::<NodeBundle>::new()
.item(
El::<TextBundle>::new()
.align(Align::new().center_x())
.text(text(name, 30.)),
)
.item(
element
.align_content_signal(
ALIGNMENT
.signal()
.map(|alignment| matches!(alignment, Alignment::Content))
.map_true_signal(|| {
RECTANGLE_CONTENT_ALIGNMENT
.signal_ref(|alignment| alignment.map(|alignment| alignment.to_align()))
})
.map(Option::flatten),
)
.apply(container_style),
)
}
fn rectangle(index: i32) -> impl Element {
let size = 40;
El::<NodeBundle>::new()
.width(Val::Px(size as f32))
.height(Val::Px(size as f32))
.background_color(BackgroundColor(bevy::color::palettes::css::DARK_GREEN.into()))
.align_signal(
ALIGNMENT
.signal()
.map(|alignment| matches!(alignment, Alignment::Self_))
.map_true_signal(|| {
RECTANGLE_SELF_ALIGNMENT.signal_ref(|alignment| alignment.map(|alignment| alignment.to_align()))
})
.map(Option::flatten),
)
.child(
El::<TextBundle>::new()
.align(Align::center())
.text(text(&index.to_string(), 14.)),
)
}
fn rectangles() -> Vec<impl Element> {
(1..=2).map(rectangle).collect()
}
fn align_switcher(rectangle_alignment: RectangleAlignment) -> impl Element {
let (hovered, hovered_signal) = Mutable::new_and_signal(false);
El::<NodeBundle>::new()
.align(rectangle_alignment.to_align())
.background_color_signal(
signal::or(
ALIGNMENT
.signal()
.map(|alignment| match alignment {
Alignment::Self_ => RECTANGLE_SELF_ALIGNMENT.signal(),
Alignment::Content => RECTANGLE_CONTENT_ALIGNMENT.signal(),
})
.flatten()
.map(move |selected_option| selected_option == Some(rectangle_alignment)),
hovered_signal,
)
.map_bool(
|| bevy::color::palettes::basic::BLUE.into(),
|| bevy::color::palettes::css::MIDNIGHT_BLUE.into(),
),
)
.with_style(|mut style| style.padding = UiRect::all(Val::Px(5.)))
.child(El::<TextBundle>::new().text(text(&rectangle_alignment.to_string(), 14.)))
.hovered_sync(hovered)
.on_click(move || {
match ALIGNMENT.get() {
Alignment::Self_ => &RECTANGLE_SELF_ALIGNMENT,
Alignment::Content => &RECTANGLE_CONTENT_ALIGNMENT,
}
.set(Some(rectangle_alignment));
})
}Additional examples can be found in:
Sourcefn on_click_propagation_stoppable(
self,
handler: impl FnMut() + Send + Sync + 'static,
propagation_stopped: impl Signal<Item = bool> + Send + 'static,
) -> Self
fn on_click_propagation_stoppable( self, handler: impl FnMut() + Send + Sync + 'static, propagation_stopped: impl Signal<Item = bool> + Send + 'static, ) -> Self
Run a function when this element is left clicked, reactively controlling whether the click
bubbles up the hierarchy with a Signal.
Sourcefn on_click_stop_propagation(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self
fn on_click_stop_propagation( self, handler: impl FnMut() + Send + Sync + 'static, ) -> Self
Run a function when this element is left clicked, stopping the click from bubbling up the hierarchy.
Examples found in repository?
examples/challenge07.rs (line 151)
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
fn x_button(on_click: impl FnMut() + Send + Sync + 'static) -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.background_color(BackgroundColor(Color::NONE))
// stop propagation because otherwise clearing the dropdown will drop down the
// options too; the x should eat the click
.on_click_stop_propagation(on_click)
.child(
El::<TextBundle>::new().text(text("x")).on_signal_with_text(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::RED.into(), || Color::WHITE),
|mut text, color| {
if let Some(section) = text.sections.first_mut() {
section.style.color = color;
}
},
),
)
.hovered_sync(hovered)
}More examples
examples/main_menu.rs (line 1056)
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
fn x_button(on_click: impl FnMut() + Send + Sync + 'static) -> impl Element {
let hovered = Mutable::new(false);
El::<NodeBundle>::new()
.background_color(BackgroundColor(Color::NONE))
.hovered_sync(hovered.clone())
// stop propagation because otherwise clearing the dropdown will drop down the
// options too; the x should eat the click
.on_click_stop_propagation(on_click)
.child(
El::<TextBundle>::new().text(text("x")).on_signal_with_text(
hovered
.signal()
.map_bool(|| bevy::color::palettes::basic::RED.into(), || TEXT_COLOR),
|mut text, color| {
if let Some(section) = text.sections.first_mut() {
section.style.color = color;
}
},
),
)
}Sourcefn on_right_click(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
fn on_right_click(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
Run a function when this element is right clicked.
Sourcefn on_click_outside_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static,
) -> Self
fn on_click_outside_with_system<Marker>( self, handler: impl IntoSystem<(Entity, Pointer<Click>), (), Marker> + Send + 'static, ) -> Self
When a Pointer<Click> is received outside this Element
or its descendents, run a System that takes In this element’s
Entity and the Pointer<Click>. Requires the UiRoot Resource to exist in the
World. This method can be called repeatedly to register many such handlers.
Examples found in repository?
examples/character_editor.rs (lines 153-155)
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
fn ui_root() -> impl Element {
El::<NodeBundle>::new()
.ui_root()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.align_content(Align::center())
.child(
Stack::<NodeBundle>::new()
.width(Val::Percent(100.))
.height(Val::Percent(100.))
.layer(
Column::<NodeBundle>::new()
.align(Align::new().center_y().right())
.with_style(|mut style| {
style.padding.right = Val::Percent(20.);
style.row_gap = Val::Px(20.);
})
.item({
let focused = Mutable::new(false);
let name = Mutable::new(String::new());
let name_shape_syncer = name.signal_cloned().for_each_sync(|name| {
if let Some((i, shape)) =
Shape::iter().enumerate().find(|(_, shape)| shape.to_string() == name)
{
SELECTED_SHAPE.set_neq(shape);
if let Val::Px(height) = BUTTON_HEIGHT {
SCROLL_POSITION.set(i as f32 * -height);
}
}
});
TextInput::new()
.update_raw_el(move |raw_el| raw_el.hold_tasks([spawn(name_shape_syncer)]))
.width(BUTTON_WIDTH)
.height(Val::Px(40.))
.mode(CosmicWrap::InfiniteLine)
.scroll_disabled()
.cursor_color(CursorColor(Color::WHITE))
.fill_color(CosmicBackgroundColor(NORMAL_BUTTON))
.attrs(TextAttrs::new().color(Color::WHITE))
.placeholder(
Placeholder::new()
.text("name")
.attrs(TextAttrs::new().color(bevy::color::palettes::basic::GRAY)),
)
.focus_signal(focused.signal())
.focused_sync(focused)
.on_change_sync(name)
.on_click_outside_with_system(|In(_), mut commands: Commands| {
commands.remove_resource::<FocusedTextInput>()
})
})
.item({
let hovereds = MutableVec::new_with_values(
(0..Shape::iter().count()).map(|_| Mutable::new(false)).collect(),
);
Column::<NodeBundle>::new()
.height(Val::Px(200.))
.align(Align::new().center_x())
.mutable_viewport(Overflow::clip_y(), LimitToBody::Vertical)
.on_scroll_with_system_on_hover(
BasicScrollHandler::new()
.direction(ScrollDirection::Vertical)
.pixels(20.)
.into_system(),
)
.viewport_y_signal(SCROLL_POSITION.signal())
.items({
let hovereds = hovereds.lock_ref().iter().cloned().collect::<Vec<_>>();
Shape::iter()
.zip(hovereds)
.map(move |(shape, hovered)| button(shape, hovered))
})
}),
),
)
}Sourcefn on_click_outside(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
fn on_click_outside(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
When a Pointer<Click> is received outside this Element
or its descendents, run a function. Requires the UiRoot Resource to exist in the
World. This method can be called repeatedly to register many such handlers.
Sourcefn on_pressed_with_system_blockable<Marker, Blocked: Component>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self
fn on_pressed_with_system_blockable<Marker, Blocked: Component>( self, handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static, ) -> Self
Sourcefn on_pressed_change_with_system<Marker>(
self,
handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static,
) -> Self
fn on_pressed_change_with_system<Marker>( self, handler: impl IntoSystem<(Entity, bool), (), Marker> + Send + 'static, ) -> Self
Sourcefn on_pressed_change(
self,
handler: impl FnMut(bool) + Send + Sync + 'static,
) -> Self
fn on_pressed_change( self, handler: impl FnMut(bool) + Send + Sync + 'static, ) -> Self
When this element’s pressed state changes, run a function with its current pressed state.
Sourcefn on_pressing_with_system_blockable<Marker, Blocked: Component>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
) -> Self
fn on_pressing_with_system_blockable<Marker, Blocked: Component>( self, handler: impl IntoSystem<Entity, (), Marker> + Send + 'static, ) -> Self
Sourcefn on_pressing_blockable<Blocked: Component>(
self,
handler: impl FnMut() + Send + Sync + 'static,
) -> Self
fn on_pressing_blockable<Blocked: Component>( self, handler: impl FnMut() + Send + Sync + 'static, ) -> Self
On frames where this element is being pressed, run a function.
Sourcefn on_pressing_blockable_signal(
self,
handler: impl FnMut() + Send + Sync + 'static,
blocked: impl Signal<Item = bool> + Send + 'static,
) -> Self
fn on_pressing_blockable_signal( self, handler: impl FnMut() + Send + Sync + 'static, blocked: impl Signal<Item = bool> + Send + 'static, ) -> Self
On frames where this element is being pressed, run a function, reactively controlling
whether the press is blocked with a Signal.
Sourcefn on_pressing(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
fn on_pressing(self, handler: impl FnMut() + Send + Sync + 'static) -> Self
When this element is being pressed, run a function.
Sourcefn on_pressing_with_system_throttled<Fut: Future<Output = ()> + Send + 'static, Marker>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
throttle: impl FnMut() -> Fut + Send + 'static,
) -> Self
fn on_pressing_with_system_throttled<Fut: Future<Output = ()> + Send + 'static, Marker>( self, handler: impl IntoSystem<Entity, (), Marker> + Send + 'static, throttle: impl FnMut() -> Fut + Send + 'static, ) -> Self
Sourcefn on_pressing_with_system_with_sleep_throttle<Marker>(
self,
handler: impl IntoSystem<Entity, (), Marker> + Send + 'static,
duration: Duration,
) -> Self
fn on_pressing_with_system_with_sleep_throttle<Marker>( self, handler: impl IntoSystem<Entity, (), Marker> + Send + 'static, duration: Duration, ) -> Self
When this element is being pressed, run a System which takes In this
element’s Entity, waiting for duration before running the handler again.
Examples found in repository?
examples/snake.rs (lines 142-147)
123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
fn hud(score: Mutable<u32>, size: Mutable<usize>, tick_rate: Mutable<u32>) -> impl Element {
Column::<NodeBundle>::new()
.width(Val::Px((WIDTH - SIDE) as f32))
.with_style(|mut style| style.row_gap = Val::Px(10.))
.align_content(Align::center())
.item(El::<TextBundle>::new().text_signal(score.signal().map(|score| {
Text::from_section(
score.to_string(),
TextStyle {
font_size: 300.,
..default()
},
)
})))
.item(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(10.))
.item(El::<TextBundle>::new().text(text("grid size:")))
.item(El::<TextBundle>::new().text_signal(size.signal().map(|size| text(&size.to_string()))))
.item(text_button("-").on_pressing_with_system_with_sleep_throttle(
|_: In<_>, mut grid_size_changes: EventWriter<GridSizeChange>| {
grid_size_changes.send(GridSizeChange::Decr);
},
Duration::from_millis(100),
))
.item(text_button("+").on_pressing_with_system_with_sleep_throttle(
|_: In<_>, mut grid_size_changes: EventWriter<GridSizeChange>| {
grid_size_changes.send(GridSizeChange::Incr);
},
Duration::from_millis(100),
)),
)
.item(
Row::<NodeBundle>::new()
.with_style(|mut style| style.column_gap = Val::Px(10.))
.item(El::<TextBundle>::new().text(text("tick rate:")))
.item(El::<TextBundle>::new().text_signal(tick_rate.signal().map(|size| text(&size.to_string()))))
.item(text_button("-").on_pressing_with_system_with_sleep_throttle(
|_: In<_>, world: &mut World| {
let cur_rate = TICK_RATE.get();
if cur_rate > 1 {
TICK_RATE.update(|rate| rate - 1);
world.insert_resource(Time::<Fixed>::from_seconds(1. / (cur_rate - 1) as f64));
}
},
Duration::from_millis(100),
))
.item(text_button("+").on_pressing_with_system_with_sleep_throttle(
|_: In<_>, world: &mut World| {
let cur_rate = TICK_RATE.get();
TICK_RATE.update(|rate| rate + 1);
world.insert_resource(Time::<Fixed>::from_seconds(1. / (cur_rate + 1) as f64));
},
Duration::from_millis(100),
)),
)
}Sourcefn on_pressing_throttled<Fut: Future<Output = ()> + Send + 'static>(
self,
handler: impl FnMut() + Send + Sync + 'static,
throttle: impl FnMut() -> Fut + Send + 'static,
) -> Self
fn on_pressing_throttled<Fut: Future<Output = ()> + Send + 'static>( self, handler: impl FnMut() + Send + Sync + 'static, throttle: impl FnMut() -> Fut + Send + 'static, ) -> Self
When this element is being pressed, run a function, waiting for the Future returned by
throttle to complete before running the handler again.
Sourcefn on_pressing_with_sleep_throttle(
self,
handler: impl FnMut() + Send + Sync + 'static,
duration: Duration,
) -> Self
fn on_pressing_with_sleep_throttle( self, handler: impl FnMut() + Send + Sync + 'static, duration: Duration, ) -> Self
When this element is being pressed, run a function, waiting for duration before running
the handler again.
Examples found in repository?
examples/ecs_ui_sync.rs (line 127)
111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
fn incrde_button(value: Mutable<f32>, incr: f32) -> impl Element {
let hovered = Mutable::new(false);
let f = move || {
let new = (*value.lock_ref() + incr).max(0.);
*value.lock_mut() = new;
};
El::<NodeBundle>::new()
.width(Val::Px(45.0))
.align_content(Align::center())
.background_color_signal(
hovered
.signal()
.map_bool(|| Color::hsl(300., 0.75, 0.85), || Color::hsl(300., 0.75, 0.75))
.map(BackgroundColor),
)
.hovered_sync(hovered)
.on_pressing_with_sleep_throttle(f, Duration::from_millis(50))
.child(El::<TextBundle>::new().text(text(if incr.is_sign_positive() { "+" } else { "-" })))
}Sourcefn pressed_sync(self, pressed: Mutable<bool>) -> Self
fn pressed_sync(self, pressed: Mutable<bool>) -> Self
Sync a Mutable with this element’s pressed state.
Examples found in repository?
examples/responsive_menu.rs (line 105)
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
fn nine_slice_button() -> impl Element {
let hovered = Mutable::new(false);
let pressed = Mutable::new(false);
NineSliceEl::new(map_ref! {
let hovered = hovered.signal(),
let pressed = pressed.signal() => {
if *pressed {
2
} else if *hovered {
1
} else {
0
}
}
})
.width(Val::Px(100.))
.height(Val::Px(50.))
.hovered_sync(hovered)
.pressed_sync(pressed)
}More examples
examples/challenge07.rs (line 142)
100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
fn button() -> El<NodeBundle> {
let (pressed, pressed_signal) = Mutable::new_and_signal(false);
let (hovered, hovered_signal) = Mutable::new_and_signal(false);
let pressed_hovered_broadcaster =
map_ref!(pressed_signal, hovered_signal => (*pressed_signal, *hovered_signal)).broadcast();
let border_color_signal = {
pressed_hovered_broadcaster
.signal()
.map(|(pressed, hovered)| {
if pressed {
bevy::color::palettes::basic::RED.into()
} else if hovered {
Color::WHITE
} else {
Color::BLACK
}
})
.map(BorderColor)
};
let background_color_signal = {
pressed_hovered_broadcaster
.signal()
.map(|(pressed, hovered)| {
if pressed {
PRESSED_BUTTON
} else if hovered {
HOVERED_BUTTON
} else {
NORMAL_BUTTON
}
})
.map(BackgroundColor)
};
El::<NodeBundle>::new()
.width(Val::Px(150.0))
.height(Val::Px(65.))
.with_style(|mut style| style.border = UiRect::all(Val::Px(5.0)))
.align_content(Align::center())
.border_color_signal(border_color_signal)
.background_color_signal(background_color_signal)
.hovered_sync(hovered)
.cursor_disableable_signal(CursorIcon::Grabbing, pressed.signal().dedupe())
.pressed_sync(pressed)
}examples/character_editor.rs (line 94)
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
fn button(shape: Shape, hovered: Mutable<bool>) -> impl Element {
let selected = SELECTED_SHAPE.signal().eq(shape);
let (pressed, pressed_signal) = Mutable::new_and_signal(false);
let hovered_signal = hovered.signal();
let selected_hovered_broadcaster =
map_ref!(selected, pressed_signal, hovered_signal => (*selected || *pressed_signal, *hovered_signal))
.broadcast();
let border_color_signal = {
selected_hovered_broadcaster
.signal()
.map(|(selected, hovered)| {
if selected {
bevy::color::palettes::basic::RED.into()
} else if hovered {
Color::WHITE
} else {
Color::BLACK
}
})
.map(BorderColor)
};
let background_color_signal = {
selected_hovered_broadcaster
.signal()
.map(|(selected, hovered)| {
if selected {
CLICKED_BUTTON
} else if hovered {
HOVERED_BUTTON
} else {
NORMAL_BUTTON
}
})
.map(BackgroundColor)
};
El::<NodeBundle>::new()
.width(BUTTON_WIDTH)
.height(BUTTON_HEIGHT)
.with_style(|mut style| style.border = UiRect::all(Val::Px(5.)))
.align_content(Align::center())
.border_color_signal(border_color_signal)
.background_color_signal(background_color_signal)
.hovered_sync(hovered)
.pressed_sync(pressed)
.on_click(move || SELECTED_SHAPE.set_neq(shape))
.child(El::<TextBundle>::new().text(Text::from_section(
shape.to_string(),
TextStyle {
font_size: 40.0,
color: Color::srgb(0.9, 0.9, 0.9),
..default()
},
)))
}examples/main_menu.rs (line 128)
88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
fn new() -> Self {
let (selected, selected_signal) = Mutable::new_and_signal(false);
let (pressed, pressed_signal) = Mutable::new_and_signal(false);
let (hovered, hovered_signal) = Mutable::new_and_signal(false);
let selected_hovered_broadcaster = map_ref!(selected_signal, pressed_signal, hovered_signal => (*selected_signal || *pressed_signal, *hovered_signal)).broadcast();
let border_color_signal = {
selected_hovered_broadcaster
.signal()
.map(|(selected, hovered)| {
if selected {
bevy::color::palettes::basic::RED.into()
} else if hovered {
Color::WHITE
} else {
Color::BLACK
}
})
.map(BorderColor)
};
let background_color_signal = {
selected_hovered_broadcaster
.signal()
.map(|(selected, hovered)| {
if selected {
CLICKED_BUTTON
} else if hovered {
HOVERED_BUTTON
} else {
NORMAL_BUTTON
}
})
.map(BackgroundColor)
};
Self {
el: {
El::<NodeBundle>::new()
.height(Val::Px(DEFAULT_BUTTON_HEIGHT))
.with_style(|mut style| {
style.border = UiRect::all(Val::Px(BASE_BORDER_WIDTH));
})
.pressed_sync(pressed)
.align_content(Align::center())
.hovered_sync(hovered.clone())
.border_color_signal(border_color_signal)
.background_color_signal(background_color_signal)
},
selected,
hovered,
}
}examples/button.rs (line 71)
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
fn button(font: Handle<Font>) -> impl Element {
let (pressed, pressed_signal) = Mutable::new_and_signal(false);
let (hovered, hovered_signal) = Mutable::new_and_signal(false);
let pressed_hovered_broadcaster =
map_ref!(pressed_signal, hovered_signal => (*pressed_signal, *hovered_signal)).broadcast();
let border_color_signal = {
pressed_hovered_broadcaster
.signal()
.map(|(pressed, hovered)| {
if pressed {
bevy::color::palettes::basic::RED.into()
} else if hovered {
Color::WHITE
} else {
Color::BLACK
}
})
.map(BorderColor)
};
let background_color_signal = {
pressed_hovered_broadcaster
.signal()
.map(|(pressed, hovered)| {
if pressed {
PRESSED_BUTTON
} else if hovered {
HOVERED_BUTTON
} else {
NORMAL_BUTTON
}
})
.map(BackgroundColor)
};
El::<NodeBundle>::new()
.width(Val::Px(150.0))
.height(Val::Px(65.))
.with_style(|mut style| style.border = UiRect::all(Val::Px(5.0)))
.align_content(Align::center())
.border_color_signal(border_color_signal)
.background_color_signal(background_color_signal)
.border_radius(BorderRadius::MAX)
.hovered_sync(hovered)
.pressed_sync(pressed)
.child(
El::<TextBundle>::new().text_signal(
pressed_hovered_broadcaster
.signal()
.map(|(pressed, hovered)| {
if pressed {
"Press"
} else if hovered {
"Hover"
} else {
"Button"
}
})
.map(move |string| {
Text::from_section(
string,
TextStyle {
font: font.clone(),
font_size: 40.0,
color: Color::srgb(0.9, 0.9, 0.9),
},
)
}),
),
)
}Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.