Files
8bitMyGoUI/input/holdbutton.go
T
ZacharyZhang-NY b4b4d67b92 Audit keyboard, focus, veils, motion and clocks across all 500
A cross-cutting pass, each fix with a test that failed first.

Veils: MyGo still hands a key to a base that turned off this frame,
so every element key now goes through pixel.Shortcut, which an
archtest enforces. Input handlers record and the build applies them
only while enabled; the editor turns away a veil-frame letter or
copy; value bases get a copy and keep only enabled turns. Popups
give a held focus back to their opener when the veil lifts.

Motion: S5 is enforced at the clock. Every Tick, Since, Step,
Toward and Shot runs at 4-15 fps; blinks keep 1 Hz on 4 fps steps,
fast animations step at 15, and drawn time is quantized to frames.

Clocks stepping back: Since holds at zero without overflow, and
k.Elapsed moves a stored start to now, so nothing goes negative,
runs backward or indexes out of range.

Also: logs count typed text instead of holding it, gallery names
use glyphs the font has, removable rows are keyed, components take
their own Options (archtest), and sweeps over all 508 demos check
veiled keys, clicks, wheels, the clock stepping back and names.
2026-10-12 16:03:04 -04:00

100 lines
2.3 KiB
Go

package input
import (
"fmt"
"log/slog"
"time"
"github.com/egoist/mygo/ui"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
)
type HoldButtonOptions struct {
// Duration is the hold needed; zero means one second.
Duration time.Duration
// Danger fills in Bad instead of Accent.
Danger bool
Disabled bool
}
type HoldButtonResult struct {
Element *ui.Element
Confirmed bool
}
type holdButtonKey struct{}
// holding is a hold's start and its last key repeat.
type holding struct {
since, key time.Time
done bool
}
// repeatGap outlasts a key's delay before it repeats.
const repeatGap = 600 * time.Millisecond
// HoldButton confirms only when held; its fill grows stepwise.
func HoldButton(c *ui.Context, text string, o HoldButtonOptions) HoldButtonResult {
k := pixel.K(c)
d := o.Duration
if d < 0 {
panic(fmt.Sprintf("input: HoldButton Duration %v", d))
}
if d == 0 {
d = time.Second
}
shell, base, st := pixel.Shell(c, func() *ui.Element {
return ui.ButtonBase(c).Label(text).Description(k.Msg("hold")).Disabled(o.Disabled)
})
h := ui.Local(base, holdButtonKey{}, func() holding { return holding{} })
if base.IsDisabled() {
*h = holding{}
}
now := k.Now()
// Held keys repeat; each repeat moves the hold on.
enter, space := pixel.Shortcut(base, 0, ui.KeyEnter), pixel.Shortcut(base, 0, ui.KeySpace)
if enter || space {
if k.Elapsed(&h.key) > repeatGap {
h.since = now
}
h.key = now
}
keyed := k.Elapsed(&h.key) <= repeatGap
var held time.Duration
switch {
case st.Press:
if h.since.IsZero() {
h.since = now
}
held = k.Elapsed(&h.since)
case keyed:
held = max(0, h.key.Sub(h.since))
default:
*h = holding{}
}
res := HoldButtonResult{Element: shell}
if held >= d && !h.done {
h.done, res.Confirmed = true, true
slog.Debug("8bit: hold confirmed", "label", text)
}
if st.Press || keyed {
k.Tick(c, 15)
}
steps := min(8, int(held*8/d))
fill := pixel.Accent
if o.Danger {
fill = pixel.Bad
}
shell.Size(k.D(pixel.Measure(text)+16), k.D(pixel.LineHeight+4)).Draw(func(p *ui.Painter, r ui.Rect) {
g := k.Canvas(p, r)
ink, dy := face(g, Normal, st, false)
w := (g.W - 2) * steps / 8
g.Rect(1, 1+dy, w, g.H-2-dy, fill)
g.Text(8, 2+dy, text, ink, 1)
g.Clip(1, 0, w, g.H, func() { g.Text(8, 2+dy, text, pixel.AccentInk, 1) })
g.Finish(st)
})
return res
}