107 lines
2.8 KiB
Go
107 lines
2.8 KiB
Go
package input
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import (
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"log/slog"
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"slices"
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"strconv"
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"strings"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type MultiSelectOptions struct {
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// Width is in dots; zero means 160.
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Width int
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Disabled bool
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}
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type MultiSelectResult struct {
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Element *ui.Element
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Changed bool
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}
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type multiKey struct{}
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// MultiSelect checks many options in a popup; tags show them.
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func MultiSelect(c *ui.Context, text string, chosen *[]string, options []string, o MultiSelectOptions) MultiSelectResult {
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k := pixel.K(c)
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shell, base, st := pixel.Shell(c, func() *ui.Element {
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return ui.ButtonBase(c).Role(ui.RolePopUpButton).Label(text).Description(strings.Join(*chosen, ", ")).Disabled(o.Disabled)
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})
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open := ui.Local(base, multiKey{}, func() bool { return false })
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if o.Disabled {
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// Closing on disable must not return focus to it.
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if *open {
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c.Root().Focus()
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}
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*open = false
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}
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if base.Clicked() || !*open && base.Shortcut(0, ui.KeyDown) {
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*open = !*open
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}
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shell.Size(k.D(orDef("MultiSelect Width", o.Width, 160)), k.D(pixel.LineHeight+4)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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ink, dy := face(g, Normal, st, *open)
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if len(*chosen) == 0 {
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g.Text(6, 2+dy, text, pixel.Faint, 1)
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}
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tags(g, *chosen, 3, 2+dy, g.W-14)
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g.Sprite(g.W-10, (g.H-tinyDown.H)/2+dy, tinyDown, 0, ink, 1)
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finish(g, st)
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})
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res := MultiSelectResult{Element: shell}
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ui.PopoverBase(c, base, open, func(panel *ui.Element) {
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menu(c, panel, func() {
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col := ui.Column(c).Gap(k.D(1)).FocusGroup(ui.Vertical)
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col.Children(func() {
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for i, opt := range options {
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on := slices.Contains(*chosen, opt)
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item, cb, cst := pixel.Shell(c, func() *ui.Element { return ui.CheckboxBase(c, &on).Label(opt) })
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if i == 0 {
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cb.AutoFocus()
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}
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if cb.Changed() {
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res.Changed = true
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if on {
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*chosen = append(*chosen, opt)
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} else {
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*chosen = slices.DeleteFunc(*chosen, func(s string) bool { return s == opt })
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}
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}
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item.Size(k.D(14+pixel.Measure(opt)), k.D(pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {
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var mark *pixel.Sprite
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if on {
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mark = check
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}
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box(k.Canvas(p, r), opt, mark, cst)
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})
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}
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})
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})
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})
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if res.Changed {
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slog.Debug("8bit: multiselect", "label", text, "chosen", *chosen)
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}
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return res
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}
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// tags draws chips left to right; +N counts the overflow.
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func tags(g pixel.Canvas, all []string, x, y, right int) {
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for i, t := range all {
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w := pixel.Measure(t) + 6
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room := right
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if i < len(all)-1 {
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room -= pixel.MicroWidth("+"+strconv.Itoa(len(all)-i-1)) + 2
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}
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if x+w > room {
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g.Micro(x, y+5, "+"+strconv.Itoa(len(all)-i), pixel.Ink, 1)
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return
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}
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g.Frame(x, y, w, pixel.LineHeight, pixel.Notched, pixel.Lit)
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g.Text(x+3, y, t, pixel.Ink, 1)
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x += w + 2
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}
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}
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