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feat(tracker/gioui): add ability to scroll parameter values (closes #92)

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5684185+vsariola@users.noreply.github.com 2023-07-18 22:40:53 +03:00
parent 5a2e87982e
commit cafb43f8c8
1 changed files with 16 additions and 0 deletions
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16
tracker/gioui/parameter.go
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@ -2,7 +2,10 @@ package gioui
import (
"fmt"
"image"
"math"
"gioui.org/io/pointer"
"gioui.org/layout"
"gioui.org/op/clip"
"gioui.org/op/paint"
@ -55,6 +58,15 @@ func (p ParameterStyle) Layout(gtx C) D {
layout.Rigid(func(gtx C) D {
switch p.Parameter.Type {
case tracker.IntegerParameter:
for _, e := range gtx.Events(&p.ParameterWidget.floatWidget) {
switch ev := e.(type) {
case pointer.Event:
if ev.Type == pointer.Scroll {
delta := math.Min(math.Max(float64(ev.Scroll.Y), -1), 1)
p.Parameter.Value += int(math.Round(delta))
}
}
}
gtx.Constraints.Min.X = gtx.Dp(unit.Dp(200))
gtx.Constraints.Min.Y = gtx.Dp(unit.Dp(40))
if p.Focus {
@ -67,7 +79,11 @@ func (p ParameterStyle) Layout(gtx C) D {
}
sliderStyle := material.Slider(p.Theme, &p.ParameterWidget.floatWidget, float32(p.Parameter.Min), float32(p.Parameter.Max))
sliderStyle.Color = p.Theme.Fg
r := image.Rectangle{Max: gtx.Constraints.Min}
area := clip.Rect(r).Push(gtx.Ops)
pointer.InputOp{Tag: &p.ParameterWidget.floatWidget, Types: pointer.Scroll, ScrollBounds: image.Rectangle{Min: image.Pt(0, -1e6), Max: image.Pt(0, 1e6)}}.Add(gtx.Ops)
dims := sliderStyle.Layout(gtx)
area.Pop()
p.Parameter.Value = int(p.ParameterWidget.floatWidget.Value + 0.5)
return dims
case tracker.BoolParameter: