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.
50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
package media
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import (
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"fmt"
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"math"
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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 VisualizerOptions struct {
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// Height is in dots; zero means 32.
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Height int
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}
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// Visualizer mirrors each level, 0 to 1, about the middle.
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func Visualizer(c *ui.Context, text string, levels []float64, o VisualizerOptions) *ui.Element {
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k := pixel.K(c)
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if len(levels) == 0 {
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panic("media: Visualizer has no levels")
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}
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parts := make([]string, len(levels))
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for i, l := range levels {
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if !(l >= 0 && l <= 1) {
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panic(fmt.Sprintf("media: Visualizer level %v outside 0–1", l))
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}
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parts[i] = fmt.Sprintf("%.2f", l)
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}
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h := pixel.Or("Visualizer Height", o.Height, 32)
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mid := h / 2
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return art(c, k, text, 4*len(levels)-1, h).Description(strings.Join(parts, " ")).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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for i, l := range levels {
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n := int(math.Round(l * float64(mid)))
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if n == 0 {
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continue
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}
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// Magic at the root, Accent above, an AccentLit tip.
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x, deep := 4*i, n/2
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g.Rect(x, mid-deep, 3, 2*deep, pixel.Magic)
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g.Rect(x, mid-n+1, 3, n-1-deep, pixel.Accent)
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g.Rect(x, mid+deep, 3, n-1-deep, pixel.Accent)
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g.Rect(x, mid-n, 3, 1, pixel.AccentLit)
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g.Rect(x, mid+n-1, 3, 1, pixel.AccentLit)
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}
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})
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}
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