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.
55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
package media
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import (
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"fmt"
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"log/slog"
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"math"
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"github.com/egoist/mygo/ui"
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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 ImageCompareOptions struct {
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// Scale is dots per picture dot, 1–4; zero means 2.
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Scale int
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Disabled bool
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}
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type ImageCompareResult struct {
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Element *ui.Element
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Changed bool
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}
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// ImageCompare shows before left of *split, after right.
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func ImageCompare(c *ui.Context, text string, before, after *pixel.Sprite, split *float64, o ImageCompareOptions) ImageCompareResult {
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k := pixel.K(c)
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sameSize("ImageCompare", []*pixel.Sprite{before, after})
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if !(*split >= 0 && *split <= 1) {
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panic(fmt.Sprintf("media: ImageCompare split %v outside 0–1", *split))
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}
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s := scale("ImageCompare", o.Scale, 2)
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w, h := before.W*s, before.H*s
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shell, st, changed := input.SlideBase(c, text, split, input.RailOptions{Disabled: o.Disabled})
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if changed {
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slog.Debug("8bit: image compare", "label", text, "split", *split)
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}
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at := *split
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shell.Size(k.D(w), k.D(h)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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x := int(math.Round(at * float64(w)))
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g.Sprite(0, 0, before, 0, pixel.Ink, s)
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g.Clip(x, 0, w-x, h, func() { g.Sprite(0, 0, after, 0, pixel.Ink, s) })
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g.VLine(min(x, w-1), 0, h, pixel.Edge)
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// The grip stays whole at either edge.
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gx := max(0, min(w-7, x-3))
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g.Frame(gx, h/2-5, 7, 11, pixel.Raised, pixel.Face)
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for _, d := range []int{-2, 0, 2} {
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g.HLine(gx+2, h/2+d, 3, pixel.Shade)
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}
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g.Finish(st)
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})
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return ImageCompareResult{Element: shell, Changed: changed}
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}
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