1use std::sync::Arc;
2
3use gpui::{AnyElement, AnyView, ClickEvent, MouseButton, MouseDownEvent};
4
5use crate::{Disclosure, prelude::*};
6
7#[derive(IntoElement, RegisterComponent)]
8pub struct TreeViewItem {
9 id: ElementId,
10 group_name: Option<SharedString>,
11 label: SharedString,
12 expanded: bool,
13 selected: bool,
14 disabled: bool,
15 focused: bool,
16 default_expanded: bool,
17 root_item: bool,
18 tooltip: Option<Box<dyn Fn(&mut Window, &mut App) -> AnyView + 'static>>,
19 on_click: Option<Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>>,
20 on_hover: Option<Box<dyn Fn(&bool, &mut Window, &mut App) + 'static>>,
21 on_toggle: Option<Arc<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>>,
22 on_secondary_mouse_down: Option<Box<dyn Fn(&MouseDownEvent, &mut Window, &mut App) + 'static>>,
23}
24
25impl TreeViewItem {
26 pub fn new(id: impl Into<ElementId>, label: impl Into<SharedString>) -> Self {
27 Self {
28 id: id.into(),
29 group_name: None,
30 label: label.into(),
31 expanded: false,
32 selected: false,
33 disabled: false,
34 focused: false,
35 default_expanded: false,
36 root_item: false,
37 tooltip: None,
38 on_click: None,
39 on_hover: None,
40 on_toggle: None,
41 on_secondary_mouse_down: None,
42 }
43 }
44
45 pub fn group_name(mut self, group_name: impl Into<SharedString>) -> Self {
46 self.group_name = Some(group_name.into());
47 self
48 }
49
50 pub fn on_click(
51 mut self,
52 handler: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
53 ) -> Self {
54 self.on_click = Some(Box::new(handler));
55 self
56 }
57
58 pub fn on_hover(mut self, handler: impl Fn(&bool, &mut Window, &mut App) + 'static) -> Self {
59 self.on_hover = Some(Box::new(handler));
60 self
61 }
62
63 pub fn on_secondary_mouse_down(
64 mut self,
65 handler: impl Fn(&MouseDownEvent, &mut Window, &mut App) + 'static,
66 ) -> Self {
67 self.on_secondary_mouse_down = Some(Box::new(handler));
68 self
69 }
70
71 pub fn tooltip(mut self, tooltip: impl Fn(&mut Window, &mut App) -> AnyView + 'static) -> Self {
72 self.tooltip = Some(Box::new(tooltip));
73 self
74 }
75
76 pub fn expanded(mut self, toggle: bool) -> Self {
77 self.expanded = toggle;
78 self
79 }
80
81 pub fn default_expanded(mut self, default_expanded: bool) -> Self {
82 self.default_expanded = default_expanded;
83 self
84 }
85
86 pub fn on_toggle(
87 mut self,
88 on_toggle: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
89 ) -> Self {
90 self.on_toggle = Some(Arc::new(on_toggle));
91 self
92 }
93
94 pub fn root_item(mut self, root_item: bool) -> Self {
95 self.root_item = root_item;
96 self
97 }
98
99 pub fn focused(mut self, focused: bool) -> Self {
100 self.focused = focused;
101 self
102 }
103}
104
105impl Disableable for TreeViewItem {
106 fn disabled(mut self, disabled: bool) -> Self {
107 self.disabled = disabled;
108 self
109 }
110}
111
112impl Toggleable for TreeViewItem {
113 fn toggle_state(mut self, selected: bool) -> Self {
114 self.selected = selected;
115 self
116 }
117}
118
119impl RenderOnce for TreeViewItem {
120 fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
121 let selected_bg = cx.theme().colors().element_active.opacity(0.5);
122 let selected_border = cx.theme().colors().border.opacity(0.6);
123 let focused_border = cx.theme().colors().border_focused;
124 let transparent_border = cx.theme().colors().border_transparent;
125
126 let indentation_line = h_flex().size_7().flex_none().justify_center().child(
127 div()
128 .w_px()
129 .h_full()
130 .bg(cx.theme().colors().border.opacity(0.5)),
131 );
132
133 h_flex()
134 .id(self.id)
135 .when_some(self.group_name, |this, group| this.group(group))
136 .w_full()
137 .child(
138 h_flex()
139 .id("inner_tree_view_item")
140 .group("tree_view_item")
141 .size_full()
142 .relative()
143 .map(|this| {
144 let label = self.label;
145 if self.root_item {
146 this.px_1()
147 .mb_1()
148 .gap_2p5()
149 .rounded_sm()
150 .border_1()
151 .map(|this| {
152 if self.focused && self.selected {
153 this.border_color(focused_border).bg(selected_bg)
154 } else if self.focused {
155 this.border_color(focused_border)
156 } else if self.selected {
157 this.border_color(selected_border).bg(selected_bg)
158 } else {
159 this.border_color(transparent_border)
160 }
161 })
162 .hover(|s| s.bg(cx.theme().colors().element_hover))
163 .child(
164 Disclosure::new("toggle", self.expanded)
165 .when_some(
166 self.on_toggle.clone(),
167 |disclosure, on_toggle| {
168 disclosure.on_toggle_expanded(on_toggle)
169 },
170 )
171 .opened_icon(IconName::ChevronDown)
172 .closed_icon(IconName::ChevronRight),
173 )
174 .child(
175 Label::new(label)
176 .when(!self.selected, |this| this.color(Color::Muted)),
177 )
178 } else {
179 this.child(indentation_line).child(
180 h_flex()
181 .w_full()
182 .flex_grow()
183 .px_1()
184 .rounded_sm()
185 .border_1()
186 .map(|this| {
187 if self.focused && self.selected {
188 this.border_color(focused_border).bg(selected_bg)
189 } else if self.focused {
190 this.border_color(focused_border)
191 } else if self.selected {
192 this.border_color(selected_border).bg(selected_bg)
193 } else {
194 this.border_color(transparent_border)
195 }
196 })
197 .hover(|s| s.bg(cx.theme().colors().element_hover))
198 .child(
199 Label::new(label)
200 .when(!self.selected, |this| this.color(Color::Muted)),
201 ),
202 )
203 }
204 })
205 .when_some(self.on_hover, |this, on_hover| this.on_hover(on_hover))
206 .when_some(
207 self.on_click.filter(|_| !self.disabled),
208 |this, on_click| this.cursor_pointer().on_click(on_click),
209 )
210 .when_some(self.on_secondary_mouse_down, |this, on_mouse_down| {
211 this.on_mouse_down(MouseButton::Right, move |event, window, cx| {
212 (on_mouse_down)(event, window, cx)
213 })
214 })
215 .when_some(self.tooltip, |this, tooltip| this.tooltip(tooltip)),
216 )
217 }
218}
219
220impl Component for TreeViewItem {
221 fn scope() -> ComponentScope {
222 ComponentScope::Navigation
223 }
224
225 fn description() -> Option<&'static str> {
226 Some(
227 "A hierarchical list of items that may have a parent-child relationship where children can be toggled into view by expanding or collapsing their parent item.",
228 )
229 }
230
231 fn preview(_window: &mut Window, cx: &mut App) -> Option<AnyElement> {
232 let container = || {
233 v_flex()
234 .p_2()
235 .w_64()
236 .border_1()
237 .border_color(cx.theme().colors().border_variant)
238 .bg(cx.theme().colors().panel_background)
239 };
240
241 Some(
242 example_group(vec![
243 single_example(
244 "Basic Tree View",
245 container()
246 .child(
247 TreeViewItem::new("index-1", "Tree Item Root #1")
248 .root_item(true)
249 .toggle_state(true),
250 )
251 .child(TreeViewItem::new("index-2", "Tree Item #2"))
252 .child(TreeViewItem::new("index-3", "Tree Item #3"))
253 .child(TreeViewItem::new("index-4", "Tree Item Root #2").root_item(true))
254 .child(TreeViewItem::new("index-5", "Tree Item #5"))
255 .child(TreeViewItem::new("index-6", "Tree Item #6"))
256 .into_any_element(),
257 ),
258 single_example(
259 "Active Child",
260 container()
261 .child(TreeViewItem::new("index-1", "Tree Item Root #1").root_item(true))
262 .child(TreeViewItem::new("index-2", "Tree Item #2").toggle_state(true))
263 .child(TreeViewItem::new("index-3", "Tree Item #3"))
264 .into_any_element(),
265 ),
266 single_example(
267 "Focused Parent",
268 container()
269 .child(
270 TreeViewItem::new("index-1", "Tree Item Root #1")
271 .root_item(true)
272 .focused(true)
273 .toggle_state(true),
274 )
275 .child(TreeViewItem::new("index-2", "Tree Item #2"))
276 .child(TreeViewItem::new("index-3", "Tree Item #3"))
277 .into_any_element(),
278 ),
279 single_example(
280 "Focused Child",
281 container()
282 .child(
283 TreeViewItem::new("index-1", "Tree Item Root #1")
284 .root_item(true)
285 .toggle_state(true),
286 )
287 .child(TreeViewItem::new("index-2", "Tree Item #2").focused(true))
288 .child(TreeViewItem::new("index-3", "Tree Item #3"))
289 .into_any_element(),
290 ),
291 ])
292 .into_any_element(),
293 )
294 }
295}