91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
package mujica
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import (
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"log/slog"
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"github.com/egoist/mygo/ui"
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"mujicaui/internal"
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"mujicaui/theme"
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)
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// RadioItem is one choice of a RadioGroup; Value is its stable identity.
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type RadioItem[T comparable] struct {
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Value T
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Label string
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Disabled bool
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}
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// RadioGroupOptions configure a RadioGroup.
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type RadioGroupOptions struct {
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// Horizontal lays the choices in a row; the default is a column.
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Horizontal bool
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// Label names the group for assistive technology.
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Label string
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Disabled bool
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}
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// RadioGroup chooses one item's Value into *value; arrows move the choice.
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func RadioGroup[T comparable](c *ui.Context, value *T, items []RadioItem[T], opts RadioGroupOptions) InputResult {
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if value == nil {
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panic("mujica: RadioGroup needs a value")
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}
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if len(items) == 0 {
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panic("mujica: RadioGroup needs items")
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}
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seen := make(map[T]bool, len(items))
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for _, it := range items {
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if seen[it.Value] {
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panic("mujica: RadioGroup has a duplicate value")
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}
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seen[it.Value] = true
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}
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k := Tokens(c)
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d := Density(c)
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var r InputResult
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r.Element = ui.RadioGroup(c, func() {
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for _, it := range items {
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if radioGroupItem(c, k, d, value, it) {
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r.changed = true
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slog.Debug("mujica: radio_group choose", "label", it.Label)
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}
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}
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}).Label(opts.Label).Disabled(opts.Disabled).Gap(0)
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if opts.Horizontal {
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r.Element.Row().Gap(d.Unit() * 6)
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}
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return r
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}
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// radioGroupItem builds one radio and reports whether it was chosen.
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func radioGroupItem[T comparable](c *ui.Context, k theme.Tokens, d theme.Density, value *T, it RadioItem[T]) bool {
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row := ui.RadioBase(c, value, it.Value).Gap(d.Unit() * 2).MinHeight(d.ControlHeight()).FocusRing(false).Disabled(it.Disabled)
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on := *value == it.Value
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hover, pressed := row.Hovered(), row.Pressed()
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row.Children(func() {
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dot := ui.Box(c).Size(checkboxSize, checkboxSize).Shrink(0).Radius(checkboxSize / 2)
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switch {
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case on:
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dot.Background(k.Accent).Border(theme.BorderWidth, k.AccentText)
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case pressed:
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dot.Background(k.Selection).Border(theme.BorderWidth, k.AccentText)
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case hover:
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dot.Background(k.SurfaceHover).Border(theme.BorderWidth, k.AccentText)
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default:
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dot.Background(k.Surface).Border(theme.BorderWidth, k.ControlBorder)
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}
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dot.Transition(textInputFade)
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dot.DrawOver(func(p *ui.Painter, r ui.Rect) {
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if on {
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s := r.W * 0.375
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p.Fill(ui.Rect{X: r.X + (r.W-s)/2, Y: r.Y + (r.H-s)/2, W: s, H: s}, k.OnAccent, s/2)
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}
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if row.FocusVisible() {
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internal.FocusRing(p, r, checkboxSize/2, k.Focus)
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}
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})
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ui.Text(c, it.Label)
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})
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return row.Changed()
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}
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