ZacharyZhang-NY
0e21870b64
An audio player with transport, scrubber and volume; an equalizer and a visualizer; a playlist; a cassette, cartridge and record that turn while they play and hold where they stop; piano keys, a step sequencer and a tracker you can type into; a waveform, a 16:9 video frame, an image compare, a gallery, a filmstrip, a record button and an FM tuner. input exports SlideBase, the undrawn rail its sliders share; the gallery treats exported Bases as building blocks, not components. pixel's micro font gains '#' for notes like C#4. pixel.Pad and the slide rail read input only while their base is enabled, so Inert or a fresh Disabled stops a drag or a key already sent. AGENTS records why a drawn container keeps the DISABLED description: MyGo paints a disabled subtree at half opacity.
91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
// Package media plays, shows and records sound and pictures.
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package media
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import (
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"fmt"
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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/pixel"
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)
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// Track is a song: title, artist and length.
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type Track struct {
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Title, Artist string
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Length time.Duration
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}
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// mmss prints d as m:ss, or h:mm:ss past an hour.
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func mmss(d time.Duration) string {
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s := int(d / time.Second)
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if s >= 3600 {
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return fmt.Sprintf("%d:%02d:%02d", s/3600, s/60%60, s%60)
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}
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return fmt.Sprintf("%d:%02d", s/60, s%60)
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}
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// prev is Next turned around.
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var prev = icon.Next.Mirror()
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// scale is s, or def for zero; above 4 panics.
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func scale(name string, s, def int) int {
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s = pixel.Or(name+" Scale", s, def)
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if s > 4 {
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panic(fmt.Sprintf("media: %s Scale %d outside 1–4", name, s))
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}
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return s
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}
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// art is a named picture w by h dots.
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func art(c *ui.Context, k pixel.Kit, label string, w, h int) *ui.Element {
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if label == "" {
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panic("media: a picture needs a name")
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}
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return ui.Box(c).Size(k.D(w), k.D(h)).Label(label).Role(ui.RoleImage)
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}
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// dark is the darkest slot and a line on it.
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func dark(k pixel.Kit) (body, line pixel.Slot) {
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if k.Palette().Night {
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return pixel.Well, pixel.Face
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}
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return pixel.Ink, pixel.Faint
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}
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// sameSize panics unless every sprite matches the first.
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func sameSize(name string, sps []*pixel.Sprite) {
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if len(sps) == 0 {
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panic("media: " + name + " needs pictures")
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}
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for _, sp := range sps {
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if sp.W != sps[0].W || sp.H != sps[0].H {
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panic(fmt.Sprintf("media: %s mixes %d×%d and %d×%d pictures", name, sps[0].W, sps[0].H, sp.W, sp.H))
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}
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}
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}
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type turnKey struct{}
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// turn is steps taken, their first frame, and play.
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type turn struct {
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held, from int
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playing bool
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}
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// turned counts steps while playing; stopped, it holds still.
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func turned(c *ui.Context, k pixel.Kit, e *ui.Element, playing bool, fps int) int {
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s := ui.Local(e, turnKey{}, func() turn { return turn{} })
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on := playing && !k.Reduce()
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if on {
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n := k.Tick(c, fps)
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if !s.playing {
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s.from = n - s.held
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}
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s.held = n - s.from
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}
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s.playing = on
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return s.held
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}
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