Update Gio version. Remove ticker as we already invalidate on

any Bluetooth event.

main.go

@@ -7,7 +7,6 @@ import (
 	"log"
 	"os"
 	"path"
-	"time"
 
 	"git.wow.st/gmp/ble"
 
@@ -21,7 +20,7 @@ import (
 	"gioui.org/widget"
 	"gioui.org/widget/material"
 
-	_ "gioui.org/font/gofont"
+	"gioui.org/font/gofont"
 )
 
 type conf struct {
@@ -74,6 +73,7 @@ func eventloop() {
 		app.Size(unit.Dp(400), unit.Dp(400)),
 		app.Title("HRM"),
 	)
+	gofont.Register()
 	th := material.NewTheme()
 	gtx := &layout.Context{Queue: w.Queue()}
 
@@ -117,7 +117,10 @@ func eventloop() {
 		c3 := f.Rigid(gtx, func() {
 			lst := &layout.List{Axis: layout.Vertical}
 			lst.Layout(gtx, len(periphs), func(i int) {
-				th.Button(periphs[i].Name).Layout(gtx, btns[i])
+				gtx.Constraints.Width.Min = gtx.Constraints.Width.Max
+				layout.UniformInset(unit.Dp(2)).Layout(gtx, func() {
+					th.Button(periphs[i].Name).Layout(gtx, btns[i])
+				})
 				if btns[i].Clicked(gtx) {
 					b.StopScan()
 					periph = periphs[i]
@@ -185,7 +188,6 @@ func eventloop() {
 
 	page = offpage
 
-	tick := time.NewTicker(time.Second / 30)
 	events := b.Events()
 
 	for {
@@ -251,8 +253,6 @@ func eventloop() {
 				hr = hrDecode(e.Data)
 			}
 			w.Invalidate() // refresh on any Bluetooth event
-		case <-tick.C:
-			w.Invalidate()
 		case e := <-w.Events():
 			switch e := e.(type) {
 			case system.DestroyEvent: