yog_ui/
widget.rs

1//! Widget types and styling.
2
3use crate::layout::{Align, FlexDir};
4
5/// A single widget in the UI tree.
6#[derive(Debug, Clone)]
7pub struct Widget {
8    pub kind:     WidgetKind,
9    pub id:       Option<String>,
10    pub style:    Style,
11    pub flex_dir: FlexDir,
12    pub children: Vec<Widget>,
13    pub on_click: Option<String>,
14    pub enabled:  bool,
15    pub focused:  bool,
16}
17
18#[derive(Debug, Clone)]
19pub enum WidgetKind {
20    /// Container — arranges children according to `flex_dir`.
21    Panel(FlexDir),
22    /// Static or dynamic text label.
23    Label(String),
24    /// Clickable button with text.
25    Button(String),
26    /// Minecraft item icon.
27    ItemSlot(String),
28    /// Minecraft texture blit (via `draw2d_mc_tex`).
29    McImage { id: String, img_w: f32, img_h: f32 },
30    /// Invisible spacer.
31    Spacer,
32}
33
34/// Visual and layout style for a widget.
35#[derive(Debug, Clone)]
36pub struct Style {
37    pub w:      f32,   // explicit width; 0 = auto
38    pub h:      f32,   // explicit height; 0 = auto
39    pub min_w:  f32,
40    pub min_h:  f32,
41    pub flex:   f32,   // grow factor inside flex container
42    pub gap:    f32,   // spacing between children
43    pub pad:    [f32; 4],  // top, right, bottom, left
44    pub margin: [f32; 4],
45    pub bg:     u32,   // background colour 0xAARRGGBB; 0 = transparent
46    pub color:  u32,   // text colour
47    pub align:  Align,
48    pub font_scale: f32,
49}
50
51impl Default for Style {
52    fn default() -> Self {
53        Self {
54            w: 0.0, h: 0.0, min_w: 4.0, min_h: 4.0, flex: 0.0, gap: 2.0,
55            pad: [0.0; 4], margin: [0.0; 4], bg: 0, color: 0xFF_CCCCAA,
56            align: Align::Start, font_scale: 1.0,
57        }
58    }
59}
60
61// ── Builder API ───────────────────────────────────────────────────────────────
62
63impl Widget {
64    fn new(kind: WidgetKind) -> Self {
65        let flex_dir = if let WidgetKind::Panel(dir) = &kind { *dir } else { FlexDir::Column };
66        Self { kind, id: None, style: Style::default(), flex_dir,
67               children: Vec::new(), on_click: None, enabled: true, focused: false }
68    }
69
70    pub fn id(mut self, id: impl Into<String>) -> Self { self.id = Some(id.into()); self }
71    pub fn on_click(mut self, ev: impl Into<String>) -> Self { self.on_click = Some(ev.into()); self }
72    pub fn child(mut self, w: Widget) -> Self { self.children.push(w); self }
73
74    pub fn w(mut self, w: f32) -> Self { self.style.w = w; self }
75    pub fn h(mut self, h: f32) -> Self { self.style.h = h; self }
76    pub fn min_w(mut self, v: f32) -> Self { self.style.min_w = v; self }
77    pub fn min_h(mut self, v: f32) -> Self { self.style.min_h = v; self }
78    pub fn flex(mut self, v: f32) -> Self { self.style.flex = v; self }
79    pub fn flex_dir(mut self, v: FlexDir) -> Self { self.flex_dir = v; self }
80    pub fn gap(mut self, v: f32) -> Self { self.style.gap = v; self }
81    pub fn bg(mut self, v: u32) -> Self { self.style.bg = v; self }
82    pub fn color(mut self, v: u32) -> Self { self.style.color = v; self }
83    pub fn align(mut self, v: Align) -> Self { self.style.align = v; self }
84    pub fn font_scale(mut self, v: f32) -> Self { self.style.font_scale = v; self }
85    pub fn enabled(mut self, v: bool) -> Self { self.enabled = v; self }
86    pub fn focused(mut self, v: bool) -> Self { self.focused = v; self }
87    pub fn padding(mut self, top: f32, right: f32, bottom: f32, left: f32) -> Self {
88        self.style.pad = [top, right, bottom, left]; self
89    }
90    pub fn margin(mut self, top: f32, right: f32, bottom: f32, left: f32) -> Self {
91        self.style.margin = [top, right, bottom, left]; self
92    }
93}
94
95// ── Widget constructors ───────────────────────────────────────────────────────
96
97pub fn panel(dir: FlexDir) -> Widget { Widget::new(WidgetKind::Panel(dir)) }
98pub fn label(text: impl Into<String>) -> Widget { Widget::new(WidgetKind::Label(text.into())) }
99pub fn button(text: impl Into<String>) -> Widget { Widget::new(WidgetKind::Button(text.into())) }
100pub fn item_slot(item_id: impl Into<String>) -> Widget { Widget::new(WidgetKind::ItemSlot(item_id.into())) }
101pub fn mc_image(id: impl Into<String>, img_w: f32, img_h: f32) -> Widget {
102    Widget::new(WidgetKind::McImage { id: id.into(), img_w, img_h })
103        .w(img_w).h(img_h)
104}
105pub fn spacer() -> Widget { Widget::new(WidgetKind::Spacer) }
yog_ui/widget.rs

yog_ui/
widget.rs
