Media: components 341-360

volume_control.go

@@ -0,0 +1,49 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+	"math"
+
+	"github.com/egoist/mygo/ui"
+)
+
+// VolumeControlOptions configure a VolumeControl.
+type VolumeControlOptions struct {
+	Disabled bool
+}
+
+// VolumeControl sets *volume in 5% steps and toggles *muted.
+func VolumeControl(c *ui.Context, volume *float64, muted *bool, opts VolumeControlOptions) ChoiceResult {
+	if *volume < 0 || *volume > 1 || math.IsNaN(*volume) {
+		panic("mujica: VolumeControl volume outside 0..1")
+	}
+	oldV, oldM := *volume, *muted
+	u := Density(c).Unit()
+	row := ui.Row(c).Gap(u).AlignItems(ui.Center).Role(ui.RoleGroup).Label(msg(c, "volume_control.label")).Disabled(opts.Disabled)
+	row.Children(func() {
+		icon, key := mediaVolume, "volume_control.mute"
+		if *muted || *volume == 0 {
+			icon, key = mediaMute, "volume_control.unmute"
+		}
+		b := mediaToggleAction(c, icon, msg(c, key), *muted)
+		if b.Clicked() && !b.IsDisabled() {
+			*muted = !*muted
+		}
+		s := Slider(c, volume, SliderOptions{Min: 0, Max: 1, Step: 0.05, Disabled: opts.Disabled,
+			Label: msg(c, "volume_control.label"), ShowValue: true, Format: func(v float64) string { return fmt.Sprintf("%d%%", int(math.Round(v*100))) }})
+		s.Element.Width(120)
+		// Raising the volume while muted unmutes, as players do.
+		if s.Changed() && *muted && *volume > oldV {
+			*muted = false
+		}
+	})
+	if !row.IsDisabled() && row.Shortcut(0, ui.KeyM) {
+		*muted = !*muted
+	}
+	changed := *volume != oldV || *muted != oldM
+	if changed {
+		slog.Debug("mujica: volume changed", "volume", *volume, "muted", *muted)
+	}
+	return ChoiceResult{Element: row, changed: changed}
+}