mirror of
https://github.com/vsariola/sointu.git
synced 2025-07-25 00:15:00 -04:00
feat!: display the parameters as knobs in a grid
Also removed the negbandpass & neghighpass parameters and replaced them with bandpass & highpass set to -1, to fit the switches better to the GUI. Closes #51, closes #173
This commit is contained in:
5684185+vsariola@users.noreply.github.com
parent
c3caa8de11
commit
666af9433e
428
tracker/gioui/param.go
Normal file
428
tracker/gioui/param.go
Normal file
@ -0,0 +1,428 @@
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package gioui
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import (
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"image"
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"image/color"
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"math"
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"strconv"
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"gioui.org/f32"
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"gioui.org/gesture"
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"gioui.org/io/event"
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"gioui.org/io/key"
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"gioui.org/io/pointer"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/op/clip"
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"gioui.org/op/paint"
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"gioui.org/unit"
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"gioui.org/x/stroke"
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"github.com/vsariola/sointu/tracker"
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"golang.org/x/exp/shiny/materialdesign/icons"
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)
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type (
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ParamState struct {
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drag gesture.Drag
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dragStartPt f32.Point // used to calculate the drag amount
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dragStartVal int
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tipArea TipArea
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click gesture.Click
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clickable Clickable
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}
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ParamWidget struct {
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Parameter tracker.Parameter
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State *ParamState
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Theme *Theme
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Focus bool
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Disabled bool
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}
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PortStyle struct {
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Diameter unit.Dp
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StrokeWidth unit.Dp
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Color color.NRGBA
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}
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PortWidget struct {
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Theme *Theme
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Style *PortStyle
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State *ParamState
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}
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KnobStyle struct {
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Diameter unit.Dp
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StrokeWidth unit.Dp
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Bg color.NRGBA
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Pos struct {
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Color color.NRGBA
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Bg color.NRGBA
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}
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Neg struct {
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Color color.NRGBA
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Bg color.NRGBA
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}
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Indicator struct {
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Color color.NRGBA
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Width unit.Dp
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InnerDiam unit.Dp
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OuterDiam unit.Dp
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}
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Value LabelStyle
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Title LabelStyle
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}
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KnobWidget struct {
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Theme *Theme
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Value tracker.Parameter
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State *ParamState
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Style *KnobStyle
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Hint string
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Scroll bool
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}
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SwitchStyle struct {
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Neutral struct {
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Fg color.NRGBA
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Bg color.NRGBA
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}
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Pos struct {
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Fg color.NRGBA
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Bg color.NRGBA
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}
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Neg struct {
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Fg color.NRGBA
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Bg color.NRGBA
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}
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Width unit.Dp
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Height unit.Dp
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Outline unit.Dp
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Handle unit.Dp
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Icon unit.Dp
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}
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SwitchWidget struct {
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Theme *Theme
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Value tracker.Parameter
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State *ParamState
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Style *SwitchStyle
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Hint string
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Scroll bool
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Disabled bool
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}
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)
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// ParamState
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func Param(Parameter tracker.Parameter, th *Theme, paramWidget *ParamState, focus, disabled bool) ParamWidget {
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return ParamWidget{
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Theme: th,
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State: paramWidget,
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Parameter: Parameter,
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Focus: focus,
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Disabled: disabled,
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}
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}
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func (p ParamWidget) Layout(gtx C) D {
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title := Label(p.Theme, &p.Theme.UnitEditor.Name, p.Parameter.Name())
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t := TrackerFromContext(gtx)
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widget := func(gtx C) D {
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if port, ok := p.Parameter.Port(); t.IsChoosingSendTarget() && ok {
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for p.State.clickable.Clicked(gtx) {
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t.ChooseSendTarget(p.Parameter.UnitID(), port).Do()
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}
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k := Port(p.Theme, p.State)
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return k.Layout(gtx)
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}
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switch p.Parameter.Type() {
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case tracker.IntegerParameter:
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k := Knob(p.Parameter, p.Theme, p.State, p.Parameter.Hint().Label, p.Focus, p.Disabled)
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return k.Layout(gtx)
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case tracker.BoolParameter:
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s := Switch(p.Parameter, p.Theme, p.State, p.Parameter.Hint().Label, p.Focus, p.Disabled)
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return s.Layout(gtx)
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case tracker.IDParameter:
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for p.State.clickable.Clicked(gtx) {
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t.ChooseSendSource(p.Parameter.UnitID()).Do()
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}
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btn := Btn(t.Theme, &t.Theme.Button.Text, &p.State.clickable, "Set", p.Parameter.Hint().Label)
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if p.Disabled {
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btn.Style = &t.Theme.Button.Disabled
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}
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return btn.Layout(gtx)
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}
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if _, ok := p.Parameter.Port(); ok {
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k := Port(p.Theme, p.State)
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return k.Layout(gtx)
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}
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return D{}
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}
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title.Layout(gtx)
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layout.Center.Layout(gtx, widget)
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return D{Size: image.Pt(gtx.Constraints.Max.X, gtx.Constraints.Max.Y)}
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}
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func (s *ParamState) update(gtx C, param tracker.Parameter, scroll bool) {
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for {
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p, ok := s.drag.Update(gtx.Metric, gtx.Source, gesture.Both)
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if !ok {
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break
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}
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switch p.Kind {
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case pointer.Press:
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s.dragStartPt = p.Position
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s.dragStartVal = param.Value()
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case pointer.Drag:
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// update the value based on the drag amount
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m := param.Range()
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d := p.Position.Sub(s.dragStartPt)
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amount := float32(d.X-d.Y) / float32(gtx.Dp(128))
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newValue := int(float32(s.dragStartVal) + amount*float32(m.Max-m.Min))
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param.SetValue(newValue)
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s.tipArea.Appear(gtx.Now)
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}
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}
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for {
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g, ok := s.click.Update(gtx.Source)
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if !ok {
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break
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}
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if g.Kind == gesture.KindClick && g.NumClicks > 1 {
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param.Reset()
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}
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}
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for scroll {
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e, ok := gtx.Event(pointer.Filter{
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Target: s,
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Kinds: pointer.Scroll,
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ScrollY: pointer.ScrollRange{Min: -1e6, Max: 1e6},
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})
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if !ok {
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break
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}
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if ev, ok := e.(pointer.Event); ok && ev.Kind == pointer.Scroll {
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delta := -int(math.Min(math.Max(float64(ev.Scroll.Y), -1), 1))
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param.Add(delta, ev.Modifiers.Contain(key.ModShortcut))
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s.tipArea.Appear(gtx.Now)
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}
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}
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}
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// KnobWidget
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func Knob(v tracker.Parameter, th *Theme, state *ParamState, hint string, scroll, disabled bool) KnobWidget {
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ret := KnobWidget{
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Theme: th,
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Value: v,
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State: state,
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Style: &th.Knob,
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Hint: hint,
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Scroll: scroll,
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}
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if disabled {
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ret.Style = &th.DisabledKnob
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}
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return ret
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}
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func (k *KnobWidget) Layout(gtx C) D {
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k.State.update(gtx, k.Value, k.Scroll)
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knob := func(gtx C) D {
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m := k.Value.Range()
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amount := float32(k.Value.Value()-m.Min) / float32(m.Max-m.Min)
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sw := gtx.Dp(k.Style.StrokeWidth)
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d := gtx.Dp(k.Style.Diameter)
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defer clip.Rect(image.Rectangle{Max: image.Pt(d, d)}).Push(gtx.Ops).Pop()
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event.Op(gtx.Ops, k.State)
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k.State.drag.Add(gtx.Ops)
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k.State.click.Add(gtx.Ops)
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middle := float32(k.Value.Neutral()-m.Min) / float32(m.Max-m.Min)
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pos := max(amount, middle)
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neg := min(amount, middle)
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if middle > 0 {
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k.strokeKnobArc(gtx, k.Style.Neg.Bg, sw, d, 0, neg)
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}
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if middle < 1 {
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k.strokeKnobArc(gtx, k.Style.Pos.Bg, sw, d, pos, 1)
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}
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if pos > middle {
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k.strokeKnobArc(gtx, k.Style.Pos.Color, sw, d, middle, pos)
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}
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if neg < middle {
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k.strokeKnobArc(gtx, k.Style.Neg.Color, sw, d, neg, middle)
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}
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k.strokeIndicator(gtx, amount)
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return D{Size: image.Pt(d, d)}
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}
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label := Label(k.Theme, &k.Style.Value, strconv.Itoa(k.Value.Value()))
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w := func(gtx C) D {
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return layout.Stack{Alignment: layout.Center}.Layout(gtx,
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layout.Stacked(knob),
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layout.Stacked(label.Layout))
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}
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if k.Hint != "" {
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c := gtx.Constraints
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gtx.Constraints.Max = image.Pt(1e6, 1e6)
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return k.State.tipArea.Layout(gtx, Tooltip(k.Theme, k.Hint), func(gtx C) D {
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gtx.Constraints = c
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return w(gtx)
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})
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}
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return w(gtx)
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}
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func (k *KnobWidget) strokeKnobArc(gtx C, color color.NRGBA, strokeWidth, diameter int, start, end float32) {
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rad := float32(diameter) / 2
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end = min(max(end, 0), 1)
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if end <= 0 {
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return
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}
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startAngle := float64((start*8 + 1) / 10 * 2 * math.Pi)
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deltaAngle := (end - start) * 8 * math.Pi / 5
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center := f32.Point{X: rad, Y: rad}
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r2 := rad - float32(strokeWidth)/2
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startPt := f32.Point{X: rad - r2*float32(math.Sin(startAngle)), Y: rad + r2*float32(math.Cos(startAngle))}
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segments := [...]stroke.Segment{
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stroke.MoveTo(startPt),
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stroke.ArcTo(center, deltaAngle),
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}
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s := stroke.Stroke{
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Path: stroke.Path{Segments: segments[:]},
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Width: float32(strokeWidth),
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Cap: stroke.FlatCap,
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}
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paint.FillShape(gtx.Ops, color, s.Op(gtx.Ops))
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}
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func (k *KnobWidget) strokeIndicator(gtx C, amount float32) {
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innerRad := float32(gtx.Dp(k.Style.Indicator.InnerDiam)) / 2
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outerRad := float32(gtx.Dp(k.Style.Indicator.OuterDiam)) / 2
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center := float32(gtx.Dp(k.Style.Diameter)) / 2
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angle := (float64(amount)*8 + 1) / 10 * 2 * math.Pi
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start := f32.Point{
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X: center - innerRad*float32(math.Sin(angle)),
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Y: center + innerRad*float32(math.Cos(angle)),
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}
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end := f32.Point{
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X: center - outerRad*float32(math.Sin(angle)),
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Y: center + outerRad*float32(math.Cos(angle)),
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}
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segments := [...]stroke.Segment{
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stroke.MoveTo(start),
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stroke.LineTo(end),
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}
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s := stroke.Stroke{
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Path: stroke.Path{Segments: segments[:]},
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Width: float32(k.Style.Indicator.Width),
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Cap: stroke.FlatCap,
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}
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paint.FillShape(gtx.Ops, k.Style.Indicator.Color, s.Op(gtx.Ops))
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}
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// SwitchWidget
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func Switch(v tracker.Parameter, th *Theme, state *ParamState, hint string, scroll, disabled bool) SwitchWidget {
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return SwitchWidget{
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Theme: th,
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Value: v,
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State: state,
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Style: &th.Switch,
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Hint: hint,
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Scroll: scroll,
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Disabled: disabled,
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}
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}
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func (s *SwitchWidget) Layout(gtx C) D {
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s.State.update(gtx, s.Value, s.Scroll)
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width := gtx.Dp(s.Style.Width)
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height := gtx.Dp(s.Style.Height)
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var fg, bg color.NRGBA
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o := 0
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switch {
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case s.Disabled || s.Value.Value() == 0:
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fg = s.Style.Neutral.Fg
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bg = s.Style.Neutral.Bg
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o = gtx.Dp(s.Style.Outline)
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case s.Value.Value() < 0:
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fg = s.Style.Neg.Fg
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bg = s.Style.Neg.Bg
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case s.Value.Value() > 0:
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fg = s.Style.Pos.Fg
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bg = s.Style.Pos.Bg
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}
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r := min(width, height) / 2
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fillRoundRect := func(ops *op.Ops, rect image.Rectangle, r int, c color.NRGBA) {
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defer clip.UniformRRect(rect, r).Push(ops).Pop()
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paint.ColorOp{Color: c}.Add(ops)
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paint.PaintOp{}.Add(ops)
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}
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if o > 0 {
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fillRoundRect(gtx.Ops, image.Rect(0, 0, width, height), r, fg)
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}
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fillRoundRect(gtx.Ops, image.Rect(o, o, width-o, height-o), r-o, bg)
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a := r
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b := width - r
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p := a + (b-a)*(s.Value.Value()-s.Value.Range().Min)/(s.Value.Range().Max-s.Value.Range().Min)
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circle := func(x, y, r int) clip.Op {
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b := image.Rectangle{
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Min: image.Pt(x-r, y-r),
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Max: image.Pt(x+r, y+r),
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}
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return clip.Ellipse(b).Op(gtx.Ops)
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}
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paint.FillShape(gtx.Ops, fg, circle(p, height/2, gtx.Dp(s.Style.Handle)/2))
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defer clip.Rect(image.Rectangle{Max: image.Pt(width, height)}).Push(gtx.Ops).Pop()
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event.Op(gtx.Ops, s.State)
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s.State.drag.Add(gtx.Ops)
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s.State.click.Add(gtx.Ops)
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icon := icons.NavigationClose
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if s.Value.Range().Min < 0 {
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if s.Value.Value() < 0 {
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icon = icons.ImageExposureNeg1
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} else if s.Value.Value() > 0 {
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icon = icons.ImageExposurePlus1
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}
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} else if s.Value.Value() > 0 {
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icon = icons.NavigationCheck
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}
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w := s.Theme.Icon(icon)
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i := gtx.Dp(s.Style.Icon)
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defer op.Offset(image.Pt(p-i/2, (height-i)/2)).Push(gtx.Ops).Pop()
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gtx.Constraints = layout.Exact(image.Pt(i, i))
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w.Layout(gtx, bg)
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return D{Size: image.Pt(width, height)}
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}
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//
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func Port(t *Theme, p *ParamState) PortWidget {
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return PortWidget{Theme: t, Style: &t.Port, State: p}
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}
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func (p *PortWidget) Layout(gtx C) D {
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return p.State.clickable.layout(p.State, gtx, func(gtx C) D {
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d := gtx.Dp(p.Style.Diameter)
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defer clip.Rect(image.Rectangle{Max: image.Pt(d, d)}).Push(gtx.Ops).Pop()
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p.strokeCircle(gtx)
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return D{Size: image.Pt(d, d)}
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})
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}
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func (p *PortWidget) strokeCircle(gtx C) {
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sw := float32(gtx.Dp(p.Style.StrokeWidth))
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d := float32(gtx.Dp(p.Style.Diameter))
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rad := d / 2
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center := f32.Point{X: rad, Y: rad}
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var path clip.Path
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path.Begin(gtx.Ops)
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path.MoveTo(f32.Pt(sw/2, rad))
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path.ArcTo(center, center, float32(math.Pi*2))
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paint.FillShape(gtx.Ops, p.Style.Color,
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clip.Stroke{
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Path: path.End(),
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Width: sw,
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}.Op())
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}
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