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.
48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package pixel
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import "github.com/egoist/mygo/ui"
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// Pad is a focusable grid; it returns the picked cell.
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func Pad(c *ui.Context, text string, cols, n, cw, ch int, cur *int, disabled bool) (shell, base *ui.Element, st State, picked int) {
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k := K(c)
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shell, base, st = Shell(c, func() *ui.Element {
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return ui.Box(c).Focusable().Role(ui.RoleGroup).Label(text).Disabled(disabled)
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})
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shell.Size(k.D(cols*cw), k.D((n+cols-1)/cols*ch))
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picked = -1
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// Disabled or inert, even a key already sent waits.
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if base.IsDisabled() {
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return shell, base, st, picked
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}
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for _, m := range []struct {
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key ui.Key
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to func() int
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}{
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{ui.KeyLeft, func() int { return *cur - 1 }}, {ui.KeyRight, func() int { return *cur + 1 }},
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{ui.KeyUp, func() int { return *cur - cols }}, {ui.KeyDown, func() int { return *cur + cols }},
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{ui.KeyHome, func() int { return 0 }}, {ui.KeyEnd, func() int { return n - 1 }},
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} {
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if to := m.to(); base.Shortcut(0, m.key) && to >= 0 && to < n {
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*cur = to
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}
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}
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enter, space := base.Shortcut(0, ui.KeyEnter), base.Shortcut(0, ui.KeySpace)
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if enter || space {
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picked = *cur
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}
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// Enter and Space are taken, so clicks come from pointers.
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if base.Clicked() {
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x, y, _ := base.PointerPosition()
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if col, i := int(x/k.D(cw)), int(y/k.D(ch))*cols+int(x/k.D(cw)); x >= 0 && y >= 0 && col < cols && i < n {
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*cur, picked = i, i
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}
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}
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return shell, base, st, picked
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}
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// Cursor lights a cell with an Accent ring.
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func (g Canvas) Cursor(x, y, w, h int) {
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g.Rect(x, y, w, h, Accent)
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g.Rect(x+1, y+1, w-2, h-2, Lit)
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}
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