ZacharyZhang-NY
51af14709d
A terminal with history, a Go-colored code block, a log viewer that follows, a hex viewer, a memory map, a JSON tree, a line diff, a GAME OVER crash screen, an FPS meter, profiler bars, breakpoints, variables, command history, a shortcut list, a debug grid, a pixel editor that exports string art, a palette editor, a sprite sheet, a glyph map and a 6502 register view. layout.ScrollArea takes Follow, and ChatLog now uses it. data.TreeNode takes a Value drawn in its Slot. pixel gains Has, and Sprite.Art writes MustSprite art. pixel.Editor takes the caller's value at each input event, so a value changed between frames is never typed onto.
109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
package code
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import (
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"fmt"
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"log/slog"
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"time"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/input"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type SpriteSheetOptions struct {
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// Scale is dots per sprite dot, 1–4; zero means 2.
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Scale int
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// Columns of frames; zero means 4.
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Columns int
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// FPS is the playback speed, 4–15; zero means 6.
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FPS int
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Disabled bool
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}
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type SpriteSheetResult struct {
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Element *ui.Element
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// Changed is a frame chosen or play pressed.
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Changed bool
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}
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type sheetKey struct{}
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// sheet is the frame play began on, and when.
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type sheet struct {
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from int
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since time.Time
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}
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// SpriteSheet lays frames in a grid; playing steps through them.
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func SpriteSheet(c *ui.Context, text string, sp *pixel.Sprite, frame *int, playing *bool, o SpriteSheetOptions) SpriteSheetResult {
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k := pixel.K(c)
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n, s := sp.Frames(), pixel.Or("SpriteSheet Scale", o.Scale, 2)
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fps, cols := pixel.Or("SpriteSheet FPS", o.FPS, 6), min(n, pixel.Or("SpriteSheet Columns", o.Columns, 4))
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if s > 4 || *frame < 0 || *frame >= n {
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panic(fmt.Sprintf("code: SpriteSheet frame %d of %d at scale %d", *frame, n, s))
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}
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if fps < 4 || fps > 15 {
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panic(fmt.Sprintf("code: SpriteSheet FPS %d outside 4–15", fps))
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}
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var res SpriteSheetResult
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res.Element = ui.Row(c).Gap(k.D(8)).AlignItems(ui.Start)
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sh := ui.Local(res.Element, sheetKey{}, func() sheet { return sheet{} })
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// Playback is the content asked for, so it keeps time.
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switch {
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case !*playing:
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sh.since = time.Time{}
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case sh.since.IsZero():
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sh.from, sh.since = *frame, k.Now()
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}
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if *playing {
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per := time.Second / time.Duration(fps)
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m := int(k.Now().Sub(sh.since) / per)
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*frame = (sh.from + m) % n
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k.At(c, sh.since.Add(time.Duration(m+1)*per))
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}
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cw, ch := sp.W*s+4, sp.H*s+4
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res.Element.Children(func() {
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old := *frame
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shell, base, st, _ := pixel.Pad(c, text, cols, n, cw, ch, frame, o.Disabled)
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base.Description(fmt.Sprintf("%d / %d", *frame+1, n))
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if *frame != old {
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res.Changed, sh.from, sh.since = true, *frame, k.Now()
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}
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at := *frame
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shell.Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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for i := range n {
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x, y := i%cols*cw, i/cols*ch
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g.Frame(x, y, cw, ch, pixel.Flat, pixel.Well)
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if i == at {
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g.Cursor(x, y, cw, ch)
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}
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g.Sprite(x+2, y+2, sp, i, pixel.Ink, s)
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}
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g.Finish(st)
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})
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ui.Column(c).Gap(k.D(4)).AlignItems(ui.Center).Children(func() {
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// The preview doubles the grid's scale, up to 4.
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big := min(4, 2*s)
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ui.Box(c).Size(k.D(sp.W*big+8), k.D(sp.H*big+8)).Role(ui.RoleImage).Label(fmt.Sprintf("%s %d", text, at+1)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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g.Frame(0, 0, g.W, g.H, pixel.Sunken, pixel.Well)
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g.Sprite(4, 4, sp, at, pixel.Ink, big)
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})
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sym := icon.Play
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if *playing {
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sym = icon.Pause
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}
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if input.Toggle(c, "", playing, input.ToggleOptions{Icon: sym, Label: k.Msg("play"), Disabled: o.Disabled}).Changed {
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res.Changed = true
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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: sprite sheet", "label", text, "frame", *frame, "playing", *playing)
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}
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return res
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}
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