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NIP-34 coordinate30617:7649603503856e5148d571eac2766b288a8ff1e9e35d380337a1d2b0015b4f92:omega
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button.rs

649 lines · 22.6 KB · rust
1use crate::component_prelude::*;
2use gpui::{AnyElement, AnyView, DefiniteLength};
3use ui_macros::RegisterComponent;
4
5use crate::traits::animation_ext::CommonAnimationExt;
6use crate::{ButtonCommon, ButtonLike, ButtonSize, ButtonStyle, Icon, Label};
7use crate::{
8    Color, DynamicSpacing, ElevationIndex, KeyBinding, KeybindingPosition, TintColor, prelude::*,
9};
10
11/// An element that creates a button with a label and optional icons.
12///
13/// Common buttons:
14/// - Label, Icon + Label: [`Button`] (this component)
15/// - Icon only: [`IconButton`]
16/// - Custom: [`ButtonLike`]
17///
18/// To create a more complex button than what the [`Button`] or [`IconButton`] components provide, use
19/// [`ButtonLike`] directly.
20///
21/// # Examples
22///
23/// **A button with a label**, is typically used in scenarios such as a form, where the button's label
24/// indicates what action will be performed when the button is clicked.
25///
26/// ```
27/// use ui::prelude::*;
28///
29/// Button::new("button_id", "Click me!")
30///     .on_click(|event, window, cx| {
31///         // Handle click event
32///     });
33/// ```
34///
35/// **A toggleable button**, is typically used in scenarios such as a toolbar,
36/// where the button's state indicates whether a feature is enabled or not, or
37/// a trigger for a popover menu, where clicking the button toggles the visibility of the menu.
38///
39/// ```
40/// use ui::prelude::*;
41///
42/// Button::new("button_id", "Click me!")
43///     .start_icon(Icon::new(IconName::Check))
44///     .toggle_state(true)
45///     .on_click(|event, window, cx| {
46///         // Handle click event
47///     });
48/// ```
49///
50/// To change the style of the button when it is selected use the [`selected_style`][Button::selected_style] method.
51///
52/// ```
53/// use ui::prelude::*;
54/// use ui::TintColor;
55///
56/// Button::new("button_id", "Click me!")
57///     .toggle_state(true)
58///     .selected_style(ButtonStyle::Tinted(TintColor::Accent))
59///     .on_click(|event, window, cx| {
60///         // Handle click event
61///     });
62/// ```
63/// This will create a button with a blue tinted background when selected.
64///
65/// **A full-width button**, is typically used in scenarios such as the bottom of a modal or form, where it occupies the entire width of its container.
66/// The button's content, including text and icons, is centered by default.
67///
68/// ```
69/// use ui::prelude::*;
70///
71/// let button = Button::new("button_id", "Click me!")
72///     .full_width()
73///     .on_click(|event, window, cx| {
74///         // Handle click event
75///     });
76/// ```
77///
78#[derive(IntoElement, Documented, RegisterComponent)]
79pub struct Button {
80    base: ButtonLike,
81    label: SharedString,
82    label_color: Option<Color>,
83    label_size: Option<LabelSize>,
84    selected_label: Option<SharedString>,
85    selected_label_color: Option<Color>,
86    start_icon: Option<Icon>,
87    end_icon: Option<Icon>,
88    key_binding: Option<KeyBinding>,
89    key_binding_position: KeybindingPosition,
90    alpha: Option<f32>,
91    truncate: bool,
92    loading: bool,
93}
94
95impl Button {
96    /// Creates a new [`Button`] with a specified identifier and label.
97    ///
98    /// This is the primary constructor for a [`Button`] component. It initializes
99    /// the button with the provided identifier and label text, setting all other
100    /// properties to their default values, which can be customized using the
101    /// builder pattern methods provided by this struct.
102    pub fn new(id: impl Into<ElementId>, label: impl Into<SharedString>) -> Self {
103        Self {
104            base: ButtonLike::new(id),
105            label: label.into(),
106            label_color: None,
107            label_size: None,
108            selected_label: None,
109            selected_label_color: None,
110            start_icon: None,
111            end_icon: None,
112            key_binding: None,
113            key_binding_position: KeybindingPosition::default(),
114            alpha: None,
115            truncate: false,
116            loading: false,
117        }
118    }
119
120    /// Sets the color of the button's label.
121    pub fn color(mut self, label_color: impl Into<Option<Color>>) -> Self {
122        self.label_color = label_color.into();
123        self
124    }
125
126    /// Sets the label announced by assistive technology.
127    /// Defaults to the button's visible label.
128    pub fn aria_label(mut self, label: impl Into<SharedString>) -> Self {
129        self.base = self.base.aria_label(label);
130        self
131    }
132
133    /// Sets the supplementary description announced by assistive technology
134    /// after the button's name, role, and value.
135    pub fn aria_description(mut self, description: impl Into<SharedString>) -> Self {
136        self.base = self.base.aria_description(description);
137        self
138    }
139
140    /// Sets the current value reported to assistive technology. Use this when
141    /// the button represents a control with a value, such as a combobox
142    /// trigger whose value is the current selection.
143    pub fn aria_value(mut self, value: impl Into<SharedString>) -> Self {
144        self.base = self.base.aria_value(value);
145        self
146    }
147
148    /// Overrides the role reported to assistive technology.
149    /// Defaults to [`gpui::Role::Button`].
150    pub fn aria_role(mut self, role: gpui::Role) -> Self {
151        self.base = self.base.aria_role(role);
152        self
153    }
154
155    /// Sets the expanded state reported to assistive technology, for buttons
156    /// that control a popup (e.g. dropdown or disclosure triggers).
157    pub fn aria_expanded(mut self, expanded: bool) -> Self {
158        self.base = self.base.aria_expanded(expanded);
159        self
160    }
161
162    /// Registers a handler for an accessibility action (e.g.
163    /// [`gpui::accesskit::Action::Expand`]) dispatched by assistive technology.
164    pub fn on_a11y_action(
165        mut self,
166        action: gpui::accesskit::Action,
167        listener: impl FnMut(Option<&gpui::accesskit::ActionData>, &mut Window, &mut App) + 'static,
168    ) -> Self {
169        self.base = self.base.on_a11y_action(action, listener);
170        self
171    }
172
173    /// Defines the size of the button's label.
174    pub fn label_size(mut self, label_size: impl Into<Option<LabelSize>>) -> Self {
175        self.label_size = label_size.into();
176        self
177    }
178
179    /// Sets the label used when the button is in a selected state.
180    pub fn selected_label<L: Into<SharedString>>(mut self, label: impl Into<Option<L>>) -> Self {
181        self.selected_label = label.into().map(Into::into);
182        self
183    }
184
185    /// Sets the label color used when the button is in a selected state.
186    pub fn selected_label_color(mut self, color: impl Into<Option<Color>>) -> Self {
187        self.selected_label_color = color.into();
188        self
189    }
190
191    /// Sets an icon to display at the start (left) of the button label.
192    ///
193    /// The icon's color will be overridden to `Color::Disabled` when the button is disabled.
194    pub fn start_icon(mut self, icon: impl Into<Option<Icon>>) -> Self {
195        self.start_icon = icon.into();
196        self
197    }
198
199    /// Sets an icon to display at the end (right) of the button label.
200    ///
201    /// The icon's color will be overridden to `Color::Disabled` when the button is disabled.
202    pub fn end_icon(mut self, icon: impl Into<Option<Icon>>) -> Self {
203        self.end_icon = icon.into();
204        self
205    }
206
207    /// Display the keybinding that triggers the button action.
208    pub fn key_binding(mut self, key_binding: impl Into<Option<KeyBinding>>) -> Self {
209        self.key_binding = key_binding.into();
210        self
211    }
212
213    /// Sets the position of the keybinding relative to the button label.
214    ///
215    /// This method allows you to specify where the keybinding should be displayed
216    /// in relation to the button's label.
217    pub fn key_binding_position(mut self, position: KeybindingPosition) -> Self {
218        self.key_binding_position = position;
219        self
220    }
221
222    /// Sets the alpha property of the color of label.
223    pub fn alpha(mut self, alpha: f32) -> Self {
224        self.alpha = Some(alpha);
225        self
226    }
227
228    /// Truncates overflowing labels with an ellipsis (`…`) if needed.
229    ///
230    /// Buttons with static labels should _never_ be truncated, ensure
231    /// this is only used when the label is dynamic and may overflow.
232    pub fn truncate(mut self, truncate: bool) -> Self {
233        self.truncate = truncate;
234        self
235    }
236
237    /// Displays a rotating loading spinner in place of the `start_icon`.
238    ///
239    /// When `loading` is `true`, any `start_icon` is ignored. and a rotating
240    /// loading spinner is shown instead.
241    pub fn loading(mut self, loading: bool) -> Self {
242        self.loading = loading;
243        self
244    }
245}
246
247impl Toggleable for Button {
248    /// Sets the selected state of the button.
249    ///
250    /// # Examples
251    ///
252    /// Create a toggleable button that changes appearance when selected:
253    ///
254    /// ```
255    /// use ui::prelude::*;
256    /// use ui::TintColor;
257    ///
258    /// let selected = true;
259    ///
260    /// Button::new("toggle_button", "Toggle Me")
261    ///     .start_icon(Icon::new(IconName::Check))
262    ///     .toggle_state(selected)
263    ///     .selected_style(ButtonStyle::Tinted(TintColor::Accent))
264    ///     .on_click(|event, window, cx| {
265    ///         // Toggle the selected state
266    ///     });
267    /// ```
268    fn toggle_state(mut self, selected: bool) -> Self {
269        self.base = self.base.toggle_state(selected);
270        self
271    }
272}
273
274impl SelectableButton for Button {
275    /// Sets the style for the button in a selected state.
276    ///
277    /// # Examples
278    ///
279    /// Customize the selected appearance of a button:
280    ///
281    /// ```
282    /// use ui::prelude::*;
283    /// use ui::TintColor;
284    ///
285    /// Button::new("styled_button", "Styled Button")
286    ///     .toggle_state(true)
287    ///     .selected_style(ButtonStyle::Tinted(TintColor::Accent));
288    /// ```
289    fn selected_style(mut self, style: ButtonStyle) -> Self {
290        self.base = self.base.selected_style(style);
291        self
292    }
293}
294
295impl Disableable for Button {
296    /// Disables the button, preventing interaction and changing its appearance.
297    ///
298    /// When disabled, the button's icon and label will use `Color::Disabled`.
299    ///
300    /// # Examples
301    ///
302    /// Create a disabled button:
303    ///
304    /// ```
305    /// use ui::prelude::*;
306    ///
307    /// Button::new("disabled_button", "Can't Click Me")
308    ///     .disabled(true);
309    /// ```
310    fn disabled(mut self, disabled: bool) -> Self {
311        self.base = self.base.disabled(disabled);
312        self
313    }
314}
315
316impl Clickable for Button {
317    fn on_click(
318        mut self,
319        handler: impl Fn(&gpui::ClickEvent, &mut Window, &mut App) + 'static,
320    ) -> Self {
321        self.base = self.base.on_click(handler);
322        self
323    }
324
325    fn cursor_style(mut self, cursor_style: gpui::CursorStyle) -> Self {
326        self.base = self.base.cursor_style(cursor_style);
327        self
328    }
329}
330
331impl FixedWidth for Button {
332    /// Sets a fixed width for the button.
333    ///
334    /// # Examples
335    ///
336    /// Create a button with a fixed width of 100 pixels:
337    ///
338    /// ```
339    /// use ui::prelude::*;
340    ///
341    /// Button::new("fixed_width_button", "Fixed Width")
342    ///     .width(px(100.0));
343    /// ```
344    fn width(mut self, width: impl Into<DefiniteLength>) -> Self {
345        self.base = self.base.width(width);
346        self
347    }
348
349    /// Makes the button take up the full width of its container.
350    ///
351    /// # Examples
352    ///
353    /// Create a button that takes up the full width of its container:
354    ///
355    /// ```
356    /// use ui::prelude::*;
357    ///
358    /// Button::new("full_width_button", "Full Width")
359    ///     .full_width();
360    /// ```
361    fn full_width(mut self) -> Self {
362        self.base = self.base.full_width();
363        self
364    }
365}
366
367impl ButtonCommon for Button {
368    fn id(&self) -> &ElementId {
369        self.base.id()
370    }
371
372    /// Sets the visual style of the button.
373    fn style(mut self, style: ButtonStyle) -> Self {
374        self.base = self.base.style(style);
375        self
376    }
377
378    /// Sets the size of the button.
379    fn size(mut self, size: ButtonSize) -> Self {
380        self.base = self.base.size(size);
381        self
382    }
383
384    /// Sets a tooltip that appears on hover.
385    ///
386    /// # Examples
387    ///
388    /// Add a tooltip to a button:
389    ///
390    /// ```
391    /// use ui::{Tooltip, prelude::*};
392    ///
393    /// Button::new("tooltip_button", "Hover Me")
394    ///     .tooltip(Tooltip::text("This is a tooltip"));
395    /// ```
396    fn tooltip(mut self, tooltip: impl Fn(&mut Window, &mut App) -> AnyView + 'static) -> Self {
397        self.base = self.base.tooltip(tooltip);
398        self
399    }
400
401    fn tab_index(mut self, tab_index: impl Into<isize>) -> Self {
402        self.base = self.base.tab_index(tab_index);
403        self
404    }
405
406    fn layer(mut self, elevation: ElevationIndex) -> Self {
407        self.base = self.base.layer(elevation);
408        self
409    }
410
411    fn track_focus(mut self, focus_handle: &gpui::FocusHandle) -> Self {
412        self.base = self.base.track_focus(focus_handle);
413        self
414    }
415}
416
417impl RenderOnce for Button {
418    #[allow(refining_impl_trait)]
419    fn render(mut self, window: &mut Window, cx: &mut App) -> ButtonLike {
420        let is_disabled = self.base.disabled;
421        let is_selected = self.base.selected;
422
423        let label = self
424            .selected_label
425            .filter(|_| is_selected)
426            .unwrap_or(self.label);
427
428        if self.base.aria_label.is_none() {
429            self.base.aria_label = Some(label.clone());
430        }
431
432        // Announce the displayed keybinding to assistive technology via
433        // `aria-keyshortcuts` so screen-reader users hear the same shortcut
434        // sighted users see next to the button.
435        if self.base.aria_keyshortcuts.is_none()
436            && let Some(keyshortcuts) = self
437                .key_binding
438                .as_ref()
439                .and_then(|key_binding| key_binding.keyboard_shortcut_text(window, cx))
440        {
441            self.base.aria_keyshortcuts = Some(keyshortcuts);
442        }
443
444        // A combobox's value is its visible text, so expose it as the
445        // accessible value by default. This lets combobox triggers announce
446        // their current selection without each caller wiring it up.
447        if matches!(self.base.aria_role, Some(gpui::Role::ComboBox))
448            && self.base.aria_value.is_none()
449        {
450            self.base.aria_value = Some(label.clone());
451        }
452
453        let label_color = if is_disabled {
454            Color::Disabled
455        } else if is_selected {
456            self.selected_label_color.unwrap_or(Color::Selected)
457        } else {
458            self.label_color.unwrap_or_default()
459        };
460        let loading_icon_id = (self.base.id().clone(), "loading");
461
462        self.base.child(
463            h_flex()
464                .when(self.truncate, |this| this.min_w_0().overflow_hidden())
465                .gap(DynamicSpacing::Base04.rems(cx))
466                .when_else(
467                    self.loading,
468                    |this| {
469                        this.child(
470                            Icon::new(IconName::LoadCircle)
471                                .size(IconSize::Small)
472                                .color(Color::Muted)
473                                .with_keyed_rotate_animation(loading_icon_id, 2),
474                        )
475                    },
476                    |this| {
477                        this.when_some(self.start_icon, |this, icon| {
478                            this.child(if is_disabled {
479                                icon.color(Color::Disabled)
480                            } else {
481                                icon
482                            })
483                        })
484                    },
485                )
486                .child(
487                    h_flex()
488                        .when(self.truncate, |this| this.min_w_0().overflow_hidden())
489                        .when(
490                            self.key_binding_position == KeybindingPosition::Start,
491                            |this| this.flex_row_reverse(),
492                        )
493                        .gap(DynamicSpacing::Base06.rems(cx))
494                        .justify_between()
495                        .child(
496                            Label::new(label)
497                                .color(label_color)
498                                .size(self.label_size.unwrap_or_default())
499                                .when_some(self.alpha, |this, alpha| this.alpha(alpha))
500                                .when(self.truncate, |this| this.truncate()),
501                        )
502                        .children(self.key_binding),
503                )
504                .when_some(self.end_icon, |this, icon| {
505                    this.child(if is_disabled {
506                        icon.color(Color::Disabled)
507                    } else {
508                        icon
509                    })
510                }),
511        )
512    }
513}
514
515impl Component for Button {
516    fn scope() -> ComponentScope {
517        ComponentScope::Input
518    }
519
520    fn sort_name() -> &'static str {
521        "ButtonA"
522    }
523
524    fn description() -> &'static str {
525        "A button triggers an event or action."
526    }
527
528    fn preview(_window: &mut Window, _cx: &mut App) -> AnyElement {
529        v_flex()
530            .gap_6()
531            .children(vec![
532                example_group_with_title(
533                    "Button Styles",
534                    vec![
535                        single_example(
536                            "Default",
537                            Button::new("default", "Default").into_any_element(),
538                        ),
539                        single_example(
540                            "Filled",
541                            Button::new("filled", "Filled")
542                                .style(ButtonStyle::Filled)
543                                .into_any_element(),
544                        ),
545                        single_example(
546                            "Subtle",
547                            Button::new("outline", "Subtle")
548                                .style(ButtonStyle::Subtle)
549                                .into_any_element(),
550                        ),
551                        single_example(
552                            "Tinted",
553                            Button::new("tinted_accent_style", "Accent")
554                                .style(ButtonStyle::Tinted(TintColor::Accent))
555                                .into_any_element(),
556                        ),
557                        single_example(
558                            "Transparent",
559                            Button::new("transparent", "Transparent")
560                                .style(ButtonStyle::Transparent)
561                                .into_any_element(),
562                        ),
563                    ],
564                ),
565                example_group_with_title(
566                    "Tint Styles",
567                    vec![
568                        single_example(
569                            "Accent",
570                            Button::new("tinted_accent", "Accent")
571                                .style(ButtonStyle::Tinted(TintColor::Accent))
572                                .into_any_element(),
573                        ),
574                        single_example(
575                            "Error",
576                            Button::new("tinted_negative", "Error")
577                                .style(ButtonStyle::Tinted(TintColor::Error))
578                                .into_any_element(),
579                        ),
580                        single_example(
581                            "Warning",
582                            Button::new("tinted_warning", "Warning")
583                                .style(ButtonStyle::Tinted(TintColor::Warning))
584                                .into_any_element(),
585                        ),
586                        single_example(
587                            "Success",
588                            Button::new("tinted_positive", "Success")
589                                .style(ButtonStyle::Tinted(TintColor::Success))
590                                .into_any_element(),
591                        ),
592                    ],
593                ),
594                example_group_with_title(
595                    "Special States",
596                    vec![
597                        single_example(
598                            "Default",
599                            Button::new("default_state", "Default").into_any_element(),
600                        ),
601                        single_example(
602                            "Disabled",
603                            Button::new("disabled", "Disabled")
604                                .disabled(true)
605                                .into_any_element(),
606                        ),
607                        single_example(
608                            "Selected",
609                            Button::new("selected", "Selected")
610                                .toggle_state(true)
611                                .into_any_element(),
612                        ),
613                    ],
614                ),
615                example_group_with_title(
616                    "Buttons with Icons",
617                    vec![
618                        single_example(
619                            "Start Icon",
620                            Button::new("icon_start", "Start Icon")
621                                .start_icon(Icon::new(IconName::Check))
622                                .into_any_element(),
623                        ),
624                        single_example(
625                            "End Icon",
626                            Button::new("icon_end", "End Icon")
627                                .end_icon(Icon::new(IconName::Check))
628                                .into_any_element(),
629                        ),
630                        single_example(
631                            "Both Icons",
632                            Button::new("both_icons", "Both Icons")
633                                .start_icon(Icon::new(IconName::Check))
634                                .end_icon(Icon::new(IconName::ChevronDown))
635                                .into_any_element(),
636                        ),
637                        single_example(
638                            "Icon Color",
639                            Button::new("icon_color", "Icon Color")
640                                .start_icon(Icon::new(IconName::Check).color(Color::Accent))
641                                .into_any_element(),
642                        ),
643                    ],
644                ),
645            ])
646            .into_any_element()
647    }
648}
649
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