diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4468be..30c9ad8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,16 +15,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [3.4.x] - ??
 
-- Added: metrics. If run with the `--export :2112` flag (`:2112` is a port),
-  metrics are exposed as Prometheus metrics on that port and can be HTTP
-  GET-ted.  
-- Added: a battery gauge as a `power` widget; battery as a bar rather than
+### Added
+
+- Device data export via HTTP. If run with the `--export :2112` flag (`:2112`
+  is a port), metrics are exposed as Prometheus metrics on that port.
+- A battery gauge as a `power` widget; battery as a bar rather than
   a histogram.
+- Temp widget displays degree symbol (merged from BartWillems, thanks
+  also fleaz)
+
+### Fixed
+
+- Keys not controlling process widget, #59
+- The one-column bug, #62
 
 ## [3.3.2] - ??
 
-- Fixes #15, crash caused by battery widget when some accessories have batteries
-- Fixes #57, colors with dashes in the name not found.
+### Fixed
+
+- #15, crash caused by battery widget when some accessories have batteries
+- #57, colors with dashes in the name not found.
 - Also, cjbassi/gotop#127 and cjbassi/gotop#130 were released back in v3.1.0.
 
 ## [3.3.1] - 2020-02-18
diff --git a/cmd/gotop/main.go b/cmd/gotop/main.go
index 7575655..274cf29 100644
--- a/cmd/gotop/main.go
+++ b/cmd/gotop/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"net/http"
 	"os"
 	"os/signal"
 	"path/filepath"
@@ -14,6 +15,7 @@ import (
 
 	docopt "github.com/docopt/docopt.go"
 	ui "github.com/gizak/termui/v3"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/xxxserxxx/gotop"
 	"github.com/xxxserxxx/gotop/colorschemes"
@@ -25,7 +27,7 @@ import (
 
 const (
 	appName = "gotop"
-	version = "3.3.1"
+	version = "3.4.0"
 
 	graphHorizontalScaleDelta = 3
 	defaultUI                 = "cpu\ndisk/1 2:mem/2\ntemp\nnet procs"
@@ -41,10 +43,10 @@ var (
 	stderrLogger = log.New(os.Stderr, "", 0)
 )
 
+// TODO: Add tab completion for Linux https://gist.github.com/icholy/5314423
 // TODO: state:merge #135 linux console font (cmatsuoka/console-font)
 // TODO: state:deferred 157 FreeBSD fixes & Nvidia GPU support (kraust/master). Significant CPU use impact for NVidia changes.
 // TODO: Virtual devices from Prometeus metrics @feature
-// TODO: Export Prometheus metrics @feature
 // TODO: state:merge #167 configuration file (jrswab/configFile111)
 func parseArgs(conf *gotop.Config) error {
 	usage := `
@@ -64,6 +66,7 @@ Options:
   -B, --bandwidth=bits	  Specify the number of bits per seconds.
   -l, --layout=NAME       Name of layout spec file for the UI.  Looks first in $XDG_CONFIG_HOME/gotop, then as a path.  Use "-" to pipe.
   -i, --interface=NAME    Select network interface [default: all].
+  -x, --export=PORT       Enable metrics for export on the specified port.
 
 Several interfaces can be defined using comma separated values.
 
@@ -115,8 +118,11 @@ Colorschemes:
 	if args["--minimal"].(bool) {
 		conf.Layout = "minimal"
 	}
-	if val, _ := args["--statusbar"]; val != nil {
-		rateStr, _ := args["--rate"].(string)
+	if val, _ := args["--export"]; val != nil {
+		conf.ExportPort = val.(string)
+	}
+	if val, _ := args["--rate"]; val != nil {
+		rateStr, _ := val.(string)
 		rate, err := strconv.ParseFloat(rateStr, 64)
 		if err != nil {
 			return fmt.Errorf("invalid rate parameter")
@@ -335,7 +341,7 @@ func makeConfig() gotop.Config {
 		HelpVisible:          false,
 		UpdateInterval:       time.Second,
 		AverageLoad:          false,
-		PercpuLoad:           false,
+		PercpuLoad:           true,
 		TempScale:            w.Celsius,
 		Statusbar:            false,
 		NetInterface:         w.NET_INTERFACE_ALL,
@@ -345,6 +351,7 @@ func makeConfig() gotop.Config {
 	return conf
 }
 
+// TODO: mpd visualizer widget
 func main() {
 	// Set up default config
 	conf := makeConfig()
@@ -400,6 +407,12 @@ func main() {
 		ui.Render(bar)
 	}
 
+	if conf.ExportPort != "" {
+		go func() {
+			http.Handle("/metrics", promhttp.Handler())
+			http.ListenAndServe(conf.ExportPort, nil)
+		}()
+	}
 	eventLoop(conf, grid)
 }
 
@@ -414,7 +427,6 @@ func getLayout(conf gotop.Config) io.Reader {
 	case "battery":
 		return strings.NewReader(batteryUI)
 	default:
-		log.Printf("layout = %s", conf.Layout)
 		fp := filepath.Join(conf.ConfigDir, conf.Layout)
 		fin, err := os.Open(fp)
 		if err != nil {
diff --git a/config.go b/config.go
index 7fe2d72..fc6e521 100644
--- a/config.go
+++ b/config.go
@@ -30,6 +30,7 @@ type Config struct {
 	NetInterface   string
 	Layout         string
 	MaxLogSize     int64
+	ExportPort     string
 }
 
 func Parse(in io.Reader, conf *Config) error {
@@ -109,6 +110,8 @@ func Parse(in io.Reader, conf *Config) error {
 				return err
 			}
 			conf.MaxLogSize = int64(iv)
+		case "export":
+			conf.ExportPort = kv[1]
 		}
 	}
 
diff --git a/devices/cpu_nvidia.go b/devices/cpu_nvidia.go
deleted file mode 100644
index ff4691c..0000000
--- a/devices/cpu_nvidia.go
+++ /dev/null
@@ -1,19 +0,0 @@
-package devices
-
-import (
-	"github.com/NVIDIA/gpu-monitoring-tools/bindings/go/nvml"
-	"time"
-)
-
-func init() {
-	if nvml.Init() == nil {
-		shutdownFuncs = append(shutdownFuncs, func() { nvml.Shutdown() })
-		deviceCounts = append(deviceCounts, func(b bool) (int, error) {
-			r, e := nvml.GetDeviceCount()
-			return int(r), e
-		})
-		devicePercents = append(devicePercents, func(t time.Duration, b bool) ([]float64, error) {
-			return nil, nil
-		})
-	}
-}
diff --git a/devices/devices.go b/devices/devices.go
index dabb900..91a8815 100644
--- a/devices/devices.go
+++ b/devices/devices.go
@@ -1,9 +1,26 @@
 package devices
 
-var shutdownFuncs []func()
+import "log"
 
+var shutdownFuncs []func() error
+
+// RegisterShutdown stores a function to be called by gotop on exit, allowing
+// extensions to properly release resources.  Extensions should register a
+// shutdown function IFF the extension is using resources that need to be
+// released.  The returned error will be logged, but no other action will be
+// taken.
+func RegisterShutdown(f func() error) {
+	shutdownFuncs = append(shutdownFuncs, f)
+}
+
+// Shutdown will be called by the `main()` function if gotop is exited
+// cleanly.  It will call all of the registered shutdown functions of devices,
+// logging all errors but otherwise not responding to them.
 func Shutdown() {
 	for _, f := range shutdownFuncs {
-		f()
+		err := f()
+		if err != nil {
+			log.Print(err)
+		}
 	}
 }
diff --git a/docs/extensions.md b/docs/extensions.md
new file mode 100644
index 0000000..b88f63f
--- /dev/null
+++ b/docs/extensions.md
@@ -0,0 +1,22 @@
+% Plugins
+
+
+# Extensions
+
+- Plugins will supply an `Init()` function that will call the appropriate
+  `Register\*()` functions in the `github.com/xxxserxxx/gotop/devices` package.
+- `devices` will supply:
+    - RegisterCPU (opt)
+        - Counts (req)
+        - Percents (req)
+    - RegisterMem (opt)
+    - RegisterTemp (opt)
+    - RegisterShutdown (opt)
+
+# gotop
+
+- Command line -P, comma separated list of plugin .so
+- gotop will look in `pwd` and then in \$XDG_CONFIG_HOME/gotop
+- When loaded, gotop will call lib#Init()
+
+When exited cleanly, gotop will call all registered shutdown functions.
diff --git a/docs/grid-fill.md b/docs/grid-fill.md
new file mode 100644
index 0000000..554b524
--- /dev/null
+++ b/docs/grid-fill.md
@@ -0,0 +1,42 @@
+T is max height in row
+S(T) is all widgets with height T
+R(T) is all widgets with height < T
+X is len(R) > 0 ? 1 : 0
+C is len(S) + X
+Make row
+Make C columns
+Place S
+Recurse with R; place result
+
+
+ 1         2          3       4          5
+cpu/2...............  mem/1.  6:procs/2..........
+3:temp/1.  2:disk/2.........  |..................
+|........  |................  |..................
+|........  power/2..........  |..................
+net/2...............  batt..  |..................
+
+ 1         2          3       4          5
+cpu/2...............  6:procs/2........  mem/1...
+2:disk/2............  |................  3:temp/1   
+|...................  |................  |.......
+power/2.............  |................  |.......
+net/2...............  |................  batt
+
+ 1         2          3       4          5
+1x2.................  3x2..............  1x1.....    221    221
+2x2.................  |||||||||||||||||  3x1.....    21     2x1
+||||||||||||||||||||  |||||||||||||||||  ||||||||           
+1x1......  1x1......  1x2..............  1x1.....    1121
+1x2.................  1x2..............  ||||||||    22     22x
+1x1......  1x4...................................    14     
+
+initial columns = initial row
+fill
+	pattern for row
+	does pattern fit columns?
+		yes: place widgets
+		no: new row w/ new columns; fill
+
+does fit
+	cw < patt_c_w
diff --git a/docs/releasing.md b/docs/releasing.md
new file mode 100644
index 0000000..540c950
--- /dev/null
+++ b/docs/releasing.md
@@ -0,0 +1,37 @@
+Current steps for a release:
+
+### gotop
+1. Update Version in main.go 
+2. Update CHANGELOG.md
+3. Tag
+4. Push everything
+5. ./make.sh
+6. Create github release
+
+### Homebrew
+1. Change homebrew-gotop
+```
+curl --output - -L https://github.com/xxxserxxx/gotop/releases/download/v3.3.2/gotop_3.3.2_linux_amd64.tgz | sha256sum
+curl --output - -L https://github.com/xxxserxxx/gotop/releases/download/v3.3.2/gotop_3.3.2_darwin_amd64.tgz | sha256sum
+```
+
+### AUR
+1.  Update aur/PKGBUILD
+2.  namcap PKGBUILD
+3.  makepkg
+4.  makepkg -g
+5.  makepkg --printsrcinfo \> .SRCINFO
+6.  Commit everything
+7.  push
+```
+curl -L https://github.com/xxxserxxx/gotop/archive/v3.3.2.tar.gz | sha256sum
+```
+
+### AUR-BIN
+1.  Update aur-bin/PKGBUILD
+2.  namcap PKGBUILD
+3.  makepkg
+4.  makepkg -g
+5.  makepkg --printsrcinfo \> .SRCINFO
+6.  Commit everything
+7.  push aur-bin
diff --git a/go.mod b/go.mod
index 4af5838..01d66ea 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/mailru/easyjson v0.7.1 // indirect
 	github.com/mattn/go-runewidth v0.0.4
 	github.com/mitchellh/go-wordwrap v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.4.1 // indirect
+	github.com/prometheus/client_golang v1.4.1
 	github.com/rai-project/config v0.0.0-20190926180509-3bd01e698aad // indirect
 	github.com/rai-project/logger v0.0.0-20190701163301-49978a80bf96 // indirect
 	github.com/rai-project/nvidia-smi v0.0.0-20190730061239-864eb441c9ae
diff --git a/go.sum b/go.sum
index 26eae29..dea0dac 100644
--- a/go.sum
+++ b/go.sum
@@ -1,24 +1,18 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/GeertJohan/go-sourcepath v0.0.0-20150925135350-83e8b8723a9b h1:D4H5C4VvURnduTQydyEhA6OWnNcZTLUlNX4YBw5yelY=
 github.com/GeertJohan/go-sourcepath v0.0.0-20150925135350-83e8b8723a9b/go.mod h1:X/dh6iyBHZUR+NSNoO9isIl7cRw4n09jwjK5tfr+Rno=
 github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
 github.com/GeertJohan/go.rice v0.0.0-20170420135705-c02ca9a983da/go.mod h1:DgrzXonpdQbfN3uYaGz1EG4Sbhyum/MMIn6Cphlh2bw=
-github.com/GeertJohan/go.rice v1.0.0 h1:KkI6O9uMaQU3VEKaj01ulavtF7o1fWT7+pk/4voiMLQ=
 github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
 github.com/NVIDIA/gpu-monitoring-tools v0.0.0-20200116003318-021662a21098 h1:9qTpKR5TnUxu+ViqhxkpANee27meaoHYwV0f1SnRqgI=
 github.com/NVIDIA/gpu-monitoring-tools v0.0.0-20200116003318-021662a21098/go.mod h1:nMOvShGpWaf0bXwXmeu4k+O4uziuaEI8pWzIj3BUrOA=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-github.com/Unknwon/com v0.0.0-20151008135407-28b053d5a292 h1:tuQ7w+my8a8mkwN7x2TSd7OzTjkZ7rAeSyH4xncuAMI=
 github.com/Unknwon/com v0.0.0-20151008135407-28b053d5a292/go.mod h1:KYCjqMOeHpNuTOiFQU6WEcTG7poCJrUs0YgyHNtn1no=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 h1:G1bPvciwNyF7IUmKXNt9Ak3m6u9DE1rF+RmtIkBpVdA=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -29,38 +23,25 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd h1:XtfPmj9tQRilnrEmI1HjQhxXWRhEM+m8CACtaMJE/kM=
 github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd/go.mod h1:vjcQJUZJYD3MeVGhtZXSMnCHfUNZxsyYzJt90eCYxK4=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/coreos/bbolt v1.3.2 h1:wZwiHHUieZCquLkDL0B8UhzreNWsPHooDAG3q34zk0s=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.8+incompatible h1:uDjs0KvLk1mjTf7Ykd42tRsm9EkjCQX37DAmNwb4Kxs=
 github.com/coreos/etcd v3.3.8+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
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 github.com/daaku/go.zipexe v1.0.0/go.mod h1:z8IiR6TsVLEYKwXAoE/I+8ys/sDkgTzSL0CLnGVd57E=
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@@ -68,84 +49,58 @@ github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2
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@@ -158,16 +113,12 @@ github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d/go.mod h1:IuKpRQcYE
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@@ -187,70 +138,43 @@ github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R
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 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4/go.mod h1:qsXQc7+bwAM3Q1u/4XEfrquwF8Lw7D7y5cD8CuHnfIc=
 github.com/sirupsen/logrus v1.0.5/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
-github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
-github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
-github.com/smartystreets/goconvey v0.0.0-20190306220146-200a235640ff h1:86HlEv0yBCry9syNuylzqznKXDK11p6D0DT596yNMys=
 github.com/smartystreets/goconvey v0.0.0-20190306220146-200a235640ff/go.mod h1:KSQcGKpxUMHk3nbYzs/tIBAM2iDooCn0BmttHOJEbLs=
-github.com/soheilhy/cmux v0.1.4 h1:0HKaf1o97UwFjHH9o5XsHUOF+tqmdA7KEzXLpiyaw0E=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
-github.com/spf13/afero v1.1.1 h1:Lt3ihYMlE+lreX1GS4Qw4ZsNpYQLxIXKBTEOXm3nt6I=
 github.com/spf13/afero v1.1.1/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
-github.com/spf13/cast v1.2.0 h1:HHl1DSRbEQN2i8tJmtS6ViPyHx35+p51amrdsiTCrkg=
 github.com/spf13/cast v1.2.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
-github.com/spf13/jwalterweatherman v0.0.0-20180109140146-7c0cea34c8ec h1:2ZXvIUGghLpdTVHR1UfvfrzoVlZaE/yOWC5LueIHZig=
 github.com/spf13/jwalterweatherman v0.0.0-20180109140146-7c0cea34c8ec/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
-github.com/spf13/pflag v1.0.1 h1:aCvUg6QPl3ibpQUxyLkrEkCHtPqYJL4x9AuhqVqFis4=
 github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
-github.com/spf13/viper v0.0.0-20180507071007-15738813a09d h1:pIz+bbPLk78K39d3u77IlNpJvpS/f0ao8n3sdy82eCs=
 github.com/spf13/viper v0.0.0-20180507071007-15738813a09d/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7SrnBM=
-github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/tinylib/msgp v1.1.0 h1:9fQd+ICuRIu/ue4vxJZu6/LzxN0HwMds2nq/0cFvxHU=
 github.com/tinylib/msgp v1.1.0/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
-github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 h1:LnC5Kc/wtumK+WB441p7ynQJzVuNRJiqddSIE3IlSEQ=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
-github.com/ugorji/go v0.0.0-20171019201919-bdcc60b419d1 h1:UvhxfNjNqlZ/x3cDyqxMhoiUpemd3zXkVQApN6bM/lg=
 github.com/ugorji/go v0.0.0-20171019201919-bdcc60b419d1/go.mod h1:hnLbHMwcvSihnDhEfx2/BzKp2xb0Y+ErdfYcrs9tkJQ=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
-github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 h1:eY9dn8+vbi4tKz5Qo6v2eYzo7kUS51QINcR5jNpbZS8=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
-github.com/xordataexchange/crypt v0.0.0-20170626215501-b2862e3d0a77 h1:BUfWaGtsLex4DZgdo+vxCYR13ZKbGy3pZ0MlH6CUEPk=
 github.com/xordataexchange/crypt v0.0.0-20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
-go.etcd.io/bbolt v1.3.2 h1:Z/90sZLPOeCy2PwprqkFa25PdkusRzaj9P8zm/KNyvk=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
-golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045 h1:Pn8fQdvx+z1avAi7fdM2kRYWQNxGlavNDSyzrQg2SsU=
 golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045/go.mod h1:cYlCBUl1MsqxdiKgmc4uh7TxZfWSFLOGSRR090WDxt8=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -259,7 +183,6 @@ golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 h1:dfGZHvZk057jK2MCeWus/TowKpJ8y4AmooUzdBSR9GU=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -275,27 +198,19 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82 h1:ywK/j/KkyTHcdyYSZNXGjMwgmDSfjglYZ3vStQ/gSCU=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.19.1 h1:TrBcJ1yqAl1G++wO39nD/qtgpsW9/1+QGrluyMGEYgM=
 google.golang.org/grpc v1.19.1/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
@@ -303,11 +218,9 @@ gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-howett.net/plist v0.0.0-20181124034731-591f970eefbb h1:jhnBjNi9UFpfpl8YZhA9CrOqpnJdvzuiHsl/dnxl11M=
 howett.net/plist v0.0.0-20181124034731-591f970eefbb/go.mod h1:vMygbs4qMhSZSc4lCUl2OEE+rDiIIJAIdR4m7MiMcm0=
diff --git a/layout/layout.go b/layout/layout.go
index 1dbcaa4..94a9461 100644
--- a/layout/layout.go
+++ b/layout/layout.go
@@ -31,17 +31,23 @@ var widgetNames []string = []string{"cpu", "disk", "mem", "temp", "net", "procs"
 
 func Layout(wl layout, c gotop.Config) (*MyGrid, error) {
 	rowDefs := wl.Rows
-	uiRows := make([]ui.GridItem, 0)
+	uiRows := make([][]interface{}, 0)
 	numRows := countNumRows(wl.Rows)
-	var uiRow ui.GridItem
+	var uiRow []interface{}
+	maxHeight := 0
+	heights := make([]int, 0)
+	var h int
 	for len(rowDefs) > 0 {
-		uiRow, rowDefs = processRow(c, numRows, rowDefs)
+		h, uiRow, rowDefs = processRow(c, numRows, rowDefs)
+		maxHeight += h
 		uiRows = append(uiRows, uiRow)
+		heights = append(heights, h)
 	}
 	rgs := make([]interface{}, 0)
-	for _, ur := range uiRows {
-		ur.HeightRatio = ur.HeightRatio / float64(numRows)
-		rgs = append(rgs, ur)
+	for i, ur := range uiRows {
+		rh := float64(heights[i]) / float64(maxHeight)
+		log.Printf("appending row %d with height %d", i, heights[i])
+		rgs = append(rgs, ui.NewRow(rh, ur...))
 	}
 	grid := &MyGrid{ui.NewGrid(), nil, nil}
 	grid.Set(rgs...)
@@ -58,15 +64,18 @@ func Layout(wl layout, c gotop.Config) (*MyGrid, error) {
 // if there's a row span widget in the row; in this case, it'll consume as many
 // rows as the largest row span object in the row, and produce an uber-row
 // containing all that stuff. It returns a slice without the consumed elements.
-func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (ui.GridItem, [][]widgetRule) {
+func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (int, []interface{}, [][]widgetRule) {
+	log.Printf("got %d rows", len(rowDefs))
+
 	// Recursive function #3.  See the comment in deepFindProc.
 	if len(rowDefs) < 1 {
-		return ui.GridItem{}, [][]widgetRule{}
+		return 0, nil, [][]widgetRule{}
 	}
 	// The height of the tallest widget in this row; the number of rows that
 	// will be consumed, and the overall height of the row that will be
 	// produced.
 	maxHeight := countMaxHeight([][]widgetRule{rowDefs[0]})
+	log.Printf("maxHeight %d", maxHeight)
 	var processing [][]widgetRule
 	if maxHeight < len(rowDefs) {
 		processing = rowDefs[0:maxHeight]
@@ -75,6 +84,7 @@ func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (ui.GridIte
 		processing = rowDefs[0:]
 		rowDefs = [][]widgetRule{}
 	}
+	log.Printf("consuming %d rows, %d remainder rows", len(processing), len(rowDefs))
 	var colWeights []float64
 	var columns [][]interface{}
 	numCols := len(processing[0])
@@ -86,9 +96,10 @@ func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (ui.GridIte
 		columns = append(columns, make([]interface{}, 0))
 	}
 	colHeights := make([]int, numCols)
+outer:
 	for i, row := range processing {
 		// A definition may fill up the columns before all rows are consumed,
-		// e.g. wid1/2 wid2/2.  This block checks for that and, if it occurs,
+		// e.g. cpu/2 net/2.  This block checks for that and, if it occurs,
 		// prepends the remaining rows to the "remainder" return value.
 		full := true
 		for _, ch := range colHeights {
@@ -99,18 +110,28 @@ func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (ui.GridIte
 		}
 		if full {
 			rowDefs = append(processing[i:], rowDefs...)
+			log.Printf("prepended early consumption; remainder now %d rows", len(rowDefs))
 			break
 		}
-		// Not all rows have been consumed, so go ahead and place the row's widgets in columns
-		for _, wid := range row {
-			for j, ch := range colHeights {
-				if ch+wid.Height <= maxHeight {
-					widget := makeWidget(c, wid)
-					columns[j] = append(columns[j], ui.NewRow(float64(wid.Height)/float64(maxHeight), widget))
-					colHeights[j] += wid.Height
+		// Not all rows have been consumed, so go ahead and place the row's
+		// widgets in columns
+		for w, widg := range row {
+			placed := false
+			for k := w; k < len(colHeights); k++ { // there are enough columns
+				ch := colHeights[k]
+				if ch+widg.Height <= maxHeight {
+					widget := makeWidget(c, widg)
+					columns[k] = append(columns[k], ui.NewRow(float64(widg.Height)/float64(maxHeight), widget))
+					colHeights[k] += widg.Height
+					placed = true
 					break
 				}
 			}
+			// If all columns are full, break out, return the row, and continue processing
+			if !placed {
+				rowDefs = append(processing[i:], rowDefs...)
+				break outer
+			}
 		}
 	}
 	var uiColumns []interface{}
@@ -120,11 +141,16 @@ func processRow(c gotop.Config, numRows int, rowDefs [][]widgetRule) (ui.GridIte
 		}
 	}
 
-	return ui.NewRow(1.0/float64(numRows), uiColumns...), rowDefs
+	log.Printf("returning %d columns", len(uiColumns))
+	return maxHeight, uiColumns, rowDefs
+}
+
+type Metric interface {
+	EnableMetric()
 }
 
 func makeWidget(c gotop.Config, widRule widgetRule) interface{} {
-	var w interface{}
+	var w Metric
 	switch widRule.Widget {
 	case "cpu":
 		cpu := widgets.NewCpuWidget(c.UpdateInterval, c.GraphHorizontalScale, c.AverageLoad, c.PercpuLoad)
@@ -145,7 +171,8 @@ func makeWidget(c gotop.Config, widRule widgetRule) interface{} {
 		}
 		w = cpu
 	case "disk":
-		w = widgets.NewDiskWidget()
+		dw := widgets.NewDiskWidget()
+		w = dw
 	case "mem":
 		m := widgets.NewMemWidget(c.UpdateInterval, c.GraphHorizontalScale)
 		m.LineColors["Main"] = ui.Color(c.Colorscheme.MainMem)
@@ -185,10 +212,17 @@ func makeWidget(c gotop.Config, widRule widgetRule) interface{} {
 			i++
 		}
 		w = b
+	case "power":
+		b := widgets.NewBatteryGauge()
+		b.BarColor = ui.Color(c.Colorscheme.ProcCursor)
+		w = b
 	default:
 		log.Printf("Invalid widget name %s.  Must be one of %v", widRule.Widget, widgetNames)
 		return ui.NewBlock()
 	}
+	if c.ExportPort != "" {
+		w.EnableMetric()
+	}
 	return w
 }
 
@@ -262,6 +296,15 @@ func deepFindProc(gs interface{}) *widgets.ProcWidget {
 			}
 		}
 	}
+	fs2, ok := gs.([][]interface{})
+	if ok {
+		for _, g := range fs2 {
+			v := deepFindProc(g)
+			if v != nil {
+				return v
+			}
+		}
+	}
 	p, ok := gs.(*widgets.ProcWidget)
 	if ok {
 		return p
diff --git a/layout/layout_test.go b/layout/layout_test.go
index d1f016d..568bbee 100644
--- a/layout/layout_test.go
+++ b/layout/layout_test.go
@@ -101,6 +101,33 @@ func TestParsing(t *testing.T) {
 			assert.Equal(t, 1, l.Rows[1][0].Height)
 			assert.Equal(t, 1.0, l.Rows[1][0].Weight)
 		}},
+		{"cpu/2 mem/1 6:procs\n3:temp/1 2:disk/2\npower\nnet procs", func(l layout) {
+			assert.Equal(t, 4, len(l.Rows))
+			// First row
+			assert.Equal(t, 3, len(l.Rows[0]))
+			assert.Equal(t, 1, l.Rows[0][0].Height)
+			assert.Equal(t, 0.5, l.Rows[0][0].Weight)
+			assert.Equal(t, 1, l.Rows[0][1].Height)
+			assert.Equal(t, 0.25, l.Rows[0][1].Weight)
+			assert.Equal(t, 6, l.Rows[0][2].Height)
+			assert.Equal(t, 0.25, l.Rows[0][2].Weight)
+			// Second row
+			assert.Equal(t, 2, len(l.Rows[1]))
+			assert.Equal(t, 3, l.Rows[1][0].Height)
+			assert.Equal(t, 1/3.0, l.Rows[1][0].Weight)
+			assert.Equal(t, 2, l.Rows[1][1].Height)
+			assert.Equal(t, 2/3.0, l.Rows[1][1].Weight)
+			// Third row
+			assert.Equal(t, 1, len(l.Rows[2]))
+			assert.Equal(t, 1, l.Rows[2][0].Height)
+			assert.Equal(t, 1.0, l.Rows[2][0].Weight)
+			// Fourth row
+			assert.Equal(t, 2, len(l.Rows[3]))
+			assert.Equal(t, 1, l.Rows[3][0].Height)
+			assert.Equal(t, 0.5, l.Rows[3][0].Weight)
+			assert.Equal(t, 1, l.Rows[3][1].Height)
+			assert.Equal(t, 0.5, l.Rows[3][1].Weight)
+		}},
 	}
 
 	for _, tc := range tests {
diff --git a/layouts/kitchensink b/layouts/kitchensink
new file mode 100644
index 0000000..71a542f
--- /dev/null
+++ b/layouts/kitchensink
@@ -0,0 +1,4 @@
+3:cpu/2     3:mem/1
+4:temp/1    3:disk/2
+            power
+3:net       3:procs
diff --git a/layouts/many_columns_test b/layouts/many_columns_test
new file mode 100644
index 0000000..f2d57e3
--- /dev/null
+++ b/layouts/many_columns_test
@@ -0,0 +1,4 @@
+cpu/2           mem/1     6:procs/2
+3:temp/1        2:disk/2
+power
+net             procs
diff --git a/termui/gauge.go b/termui/gauge.go
new file mode 100644
index 0000000..db9a9c0
--- /dev/null
+++ b/termui/gauge.go
@@ -0,0 +1,22 @@
+package termui
+
+import (
+	. "github.com/gizak/termui/v3"
+	gizak "github.com/gizak/termui/v3/widgets"
+)
+
+// LineGraph implements a line graph of data points.
+type Gauge struct {
+	*gizak.Gauge
+}
+
+func NewGauge() *Gauge {
+	return &Gauge{
+		Gauge: gizak.NewGauge(),
+	}
+}
+
+func (self *Gauge) Draw(buf *Buffer) {
+	self.Gauge.Draw(buf)
+	self.Gauge.SetRect(self.Min.X, self.Min.Y, self.Inner.Dx(), self.Inner.Dy())
+}
diff --git a/widgets/battery.go b/widgets/battery.go
index 00764c0..b47cac4 100644
--- a/widgets/battery.go
+++ b/widgets/battery.go
@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/distatus/battery"
+	"github.com/prometheus/client_golang/prometheus"
 
 	ui "github.com/xxxserxxx/gotop/termui"
 )
@@ -15,6 +16,7 @@ import (
 type BatteryWidget struct {
 	*ui.LineGraph
 	updateInterval time.Duration
+	metric         []prometheus.Gauge
 }
 
 func NewBatteryWidget(horizontalScale int) *BatteryWidget {
@@ -41,6 +43,25 @@ func NewBatteryWidget(horizontalScale int) *BatteryWidget {
 	return self
 }
 
+func (b *BatteryWidget) EnableMetric() {
+	bats, err := battery.GetAll()
+	if err != nil {
+		log.Printf("error setting up metrics: %v", err)
+		return
+	}
+	b.metric = make([]prometheus.Gauge, len(bats))
+	for i, bat := range bats {
+		gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+			Namespace: "gotop",
+			Subsystem: "battery",
+			Name:      fmt.Sprintf("%d", i),
+		})
+		gauge.Set(bat.Current / bat.Full)
+		b.metric[i] = gauge
+		prometheus.MustRegister(gauge)
+	}
+}
+
 func makeId(i int) string {
 	return "Batt" + strconv.Itoa(i)
 }
@@ -74,8 +95,12 @@ func (self *BatteryWidget) update() {
 	}
 	for i, battery := range batteries {
 		id := makeId(i)
-		percentFull := math.Abs(battery.Current/battery.Full) * 100.0
+		perc := battery.Current / battery.Full
+		percentFull := math.Abs(perc) * 100.0
 		self.Data[id] = append(self.Data[id], percentFull)
 		self.Labels[id] = fmt.Sprintf("%3.0f%% %.0f/%.0f", percentFull, math.Abs(battery.Current), math.Abs(battery.Full))
+		if self.metric != nil {
+			self.metric[i].Set(perc)
+		}
 	}
 }
diff --git a/widgets/batterygauge.go b/widgets/batterygauge.go
new file mode 100644
index 0000000..59accfb
--- /dev/null
+++ b/widgets/batterygauge.go
@@ -0,0 +1,86 @@
+package widgets
+
+import (
+	"fmt"
+	"log"
+
+	"time"
+
+	"github.com/distatus/battery"
+	"github.com/prometheus/client_golang/prometheus"
+
+	. "github.com/xxxserxxx/gotop/termui"
+)
+
+type BatteryGauge struct {
+	*Gauge
+	metric prometheus.Gauge
+}
+
+func NewBatteryGauge() *BatteryGauge {
+	self := &BatteryGauge{Gauge: NewGauge()}
+	self.Title = " Power Level "
+
+	self.update()
+
+	go func() {
+		for range time.NewTicker(time.Second).C {
+			self.Lock()
+			self.update()
+			self.Unlock()
+		}
+	}()
+
+	return self
+}
+
+func (b *BatteryGauge) EnableMetric() {
+	bats, err := battery.GetAll()
+	if err != nil {
+		log.Printf("error setting up metrics: %v", err)
+		return
+	}
+	mx := 0.0
+	cu := 0.0
+	for _, bat := range bats {
+		mx += bat.Full
+		cu += bat.Current
+		gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+			Namespace: "gotop",
+			Subsystem: "battery",
+			Name:      "total",
+		})
+		gauge.Set(cu / mx)
+		b.metric = gauge
+		prometheus.MustRegister(gauge)
+	}
+}
+
+func (self *BatteryGauge) update() {
+	bats, err := battery.GetAll()
+	if err != nil {
+		log.Printf("error setting up batteries: %v", err)
+		return
+	}
+	mx := 0.0
+	cu := 0.0
+	charging := "%d%% ⚡%s"
+	rate := 0.0
+	for _, bat := range bats {
+		mx += bat.Full
+		cu += bat.Current
+		if rate < bat.ChargeRate {
+			rate = bat.ChargeRate
+		}
+		if bat.State == battery.Charging {
+			charging = "%d%% 🔌%s"
+		}
+	}
+	tn := (mx - cu) / rate
+	d, _ := time.ParseDuration(fmt.Sprintf("%fh", tn))
+	self.Percent = int((cu / mx) * 100.0)
+	self.Label = fmt.Sprintf(charging, self.Percent, d.Truncate(time.Minute))
+	if self.metric != nil {
+		self.metric.Set(cu / mx)
+	}
+}
diff --git a/widgets/cpu.go b/widgets/cpu.go
index 937aa8f..c0f25bc 100644
--- a/widgets/cpu.go
+++ b/widgets/cpu.go
@@ -1,12 +1,16 @@
 package widgets
 
 import (
+	"context"
 	"fmt"
 	"log"
 	"sync"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
+	psCpu "github.com/shirou/gopsutil/cpu"
 	"github.com/xxxserxxx/gotop/devices"
+
 	ui "github.com/xxxserxxx/gotop/termui"
 )
 
@@ -18,6 +22,7 @@ type CpuWidget struct {
 	updateInterval  time.Duration
 	formatString    string
 	updateLock      sync.Mutex
+	metric          []prometheus.Gauge
 }
 
 func NewCpuWidget(updateInterval time.Duration, horizontalScale int, showAverageLoad bool, showPerCpuLoad bool) *CpuWidget {
@@ -70,6 +75,35 @@ func NewCpuWidget(updateInterval time.Duration, horizontalScale int, showAverage
 	return self
 }
 
+func (self *CpuWidget) EnableMetric() {
+	if self.ShowAverageLoad {
+		self.metric = make([]prometheus.Gauge, 1)
+		self.metric[0] = prometheus.NewGauge(prometheus.GaugeOpts{
+			Subsystem: "cpu",
+			Name:      "avg",
+		})
+	} else {
+		ctx, ccl := context.WithTimeout(context.Background(), time.Second*5)
+		defer ccl()
+		percents, err := psCpu.PercentWithContext(ctx, self.updateInterval, true)
+		if err != nil {
+			log.Printf("error setting up metrics: %v", err)
+			return
+		}
+		self.metric = make([]prometheus.Gauge, self.CpuCount)
+		for i, perc := range percents {
+			gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+				Namespace: "gotop",
+				Subsystem: "cpu",
+				Name:      fmt.Sprintf("%d", i),
+			})
+			gauge.Set(perc)
+			prometheus.MustRegister(gauge)
+			self.metric[i] = gauge
+		}
+	}
+}
+
 func (b *CpuWidget) Scale(i int) {
 	b.LineGraph.HorizontalScale = i
 }
@@ -87,6 +121,9 @@ func (self *CpuWidget) update() {
 				defer self.updateLock.Unlock()
 				self.Data["AVRG"] = append(self.Data["AVRG"], percent[0])
 				self.Labels["AVRG"] = fmt.Sprintf("%3.0f%%", percent[0])
+				if self.metric != nil {
+					self.metric[0].Set(percent[0])
+				}
 			}
 		}()
 	}
@@ -108,6 +145,13 @@ func (self *CpuWidget) update() {
 						key := fmt.Sprintf(self.formatString, i)
 						self.Data[key] = append(self.Data[key], percent)
 						self.Labels[key] = fmt.Sprintf("%3.0f%%", percent)
+						if self.metric != nil {
+							if self.metric[i] == nil {
+								log.Printf("ERROR: not enough metrics %d", i)
+							} else {
+								self.metric[i].Set(percent)
+							}
+						}
 					}
 				}
 			}
diff --git a/widgets/disk.go b/widgets/disk.go
index d20b078..d1da7a6 100644
--- a/widgets/disk.go
+++ b/widgets/disk.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
 	psDisk "github.com/shirou/gopsutil/disk"
 
 	ui "github.com/xxxserxxx/gotop/termui"
@@ -28,6 +29,7 @@ type DiskWidget struct {
 	*ui.Table
 	updateInterval time.Duration
 	Partitions     map[string]*Partition
+	metric         map[string]prometheus.Gauge
 }
 
 func NewDiskWidget() *DiskWidget {
@@ -60,6 +62,21 @@ func NewDiskWidget() *DiskWidget {
 	return self
 }
 
+func (self *DiskWidget) EnableMetric() {
+	self.metric = make(map[string]prometheus.Gauge)
+	for key, part := range self.Partitions {
+		gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+			Namespace: "gotop",
+			Subsystem: "disk",
+			Name:      strings.ReplaceAll(key, "/", ":"),
+			//Name:      strings.Replace(strings.Replace(part.Device, "/dev/", "", -1), "mapper/", "", -1),
+		})
+		gauge.Set(float64(part.UsedPercent) / 100.0)
+		prometheus.MustRegister(gauge)
+		self.metric[key] = gauge
+	}
+}
+
 func (self *DiskWidget) update() {
 	partitions, err := psDisk.Partitions(false)
 	if err != nil {
@@ -158,5 +175,12 @@ func (self *DiskWidget) update() {
 		self.Rows[i][3] = partition.Free
 		self.Rows[i][4] = partition.BytesReadRecently
 		self.Rows[i][5] = partition.BytesWrittenRecently
+		if self.metric != nil {
+			if self.metric[key] == nil {
+				log.Printf("ERROR: missing metric %s", key)
+			} else {
+				self.metric[key].Set(float64(partition.UsedPercent) / 100.0)
+			}
+		}
 	}
 }
diff --git a/widgets/mem.go b/widgets/mem.go
index d5bd67d..1c85f3b 100644
--- a/widgets/mem.go
+++ b/widgets/mem.go
@@ -5,6 +5,7 @@ import (
 	"log"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
 	psMem "github.com/shirou/gopsutil/mem"
 
 	ui "github.com/xxxserxxx/gotop/termui"
@@ -14,6 +15,8 @@ import (
 type MemWidget struct {
 	*ui.LineGraph
 	updateInterval time.Duration
+	mainMetric     prometheus.Gauge
+	swapMetric     prometheus.Gauge
 }
 
 type MemoryInfo struct {
@@ -45,6 +48,9 @@ func (self *MemWidget) updateMainMemory() {
 			Used:        mainMemory.Used,
 			UsedPercent: mainMemory.UsedPercent,
 		})
+		if self.mainMetric != nil {
+			self.mainMetric.Set(mainMemory.UsedPercent)
+		}
 	}
 }
 
@@ -73,6 +79,30 @@ func NewMemWidget(updateInterval time.Duration, horizontalScale int) *MemWidget
 	return self
 }
 
+func (b *MemWidget) EnableMetric() {
+	b.mainMetric = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: "gotop",
+		Subsystem: "memory",
+		Name:      "main",
+	})
+	mainMemory, err := psMem.VirtualMemory()
+	if err == nil {
+		b.mainMetric.Set(mainMemory.UsedPercent)
+	}
+	prometheus.MustRegister(b.mainMetric)
+
+	b.swapMetric = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: "gotop",
+		Subsystem: "memory",
+		Name:      "swap",
+	})
+	swapMemory, err := psMem.SwapMemory()
+	if err == nil {
+		b.swapMetric.Set(swapMemory.UsedPercent)
+	}
+	prometheus.MustRegister(b.swapMetric)
+}
+
 func (b *MemWidget) Scale(i int) {
 	b.LineGraph.HorizontalScale = i
 }
diff --git a/widgets/mem_freebsd.go b/widgets/mem_freebsd.go
index 7d2472a..c0151c2 100644
--- a/widgets/mem_freebsd.go
+++ b/widgets/mem_freebsd.go
@@ -60,5 +60,8 @@ func (self *MemWidget) updateSwapMemory() {
 			Used:        swapMemory.Used,
 			UsedPercent: swapMemory.UsedPercent,
 		})
+		if self.swapMetric != nil {
+			self.swapMetric.Set(swapMemory.UsedPercent)
+		}
 	}
 }
diff --git a/widgets/mem_other.go b/widgets/mem_other.go
index 6b78acb..c42ef5a 100644
--- a/widgets/mem_other.go
+++ b/widgets/mem_other.go
@@ -18,5 +18,8 @@ func (self *MemWidget) updateSwapMemory() {
 			Used:        swapMemory.Used,
 			UsedPercent: swapMemory.UsedPercent,
 		})
+		if self.swapMetric != nil {
+			self.swapMetric.Set(swapMemory.UsedPercent)
+		}
 	}
 }
diff --git a/widgets/net.go b/widgets/net.go
index ba2660d..1326fdc 100644
--- a/widgets/net.go
+++ b/widgets/net.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
 	psNet "github.com/shirou/gopsutil/net"
 
 	ui "github.com/xxxserxxx/gotop/termui"
@@ -25,6 +26,8 @@ type NetWidget struct {
 	totalBytesRecv uint64
 	totalBytesSent uint64
 	NetInterface   []string
+	sentMetric     prometheus.Counter
+	recvMetric     prometheus.Counter
 }
 
 // TODO: state:merge #169 % option for network use (jrswab/networkPercentage)
@@ -59,6 +62,22 @@ func NewNetWidget(netInterface string) *NetWidget {
 	return self
 }
 
+func (b *NetWidget) EnableMetric() {
+	b.recvMetric = prometheus.NewCounter(prometheus.CounterOpts{
+		Namespace: "gotop",
+		Subsystem: "net",
+		Name:      "recv",
+	})
+	prometheus.MustRegister(b.recvMetric)
+
+	b.sentMetric = prometheus.NewCounter(prometheus.CounterOpts{
+		Namespace: "gotop",
+		Subsystem: "net",
+		Name:      "sent",
+	})
+	prometheus.MustRegister(b.sentMetric)
+}
+
 func (self *NetWidget) update() {
 	interfaces, err := psNet.IOCounters(true)
 	if err != nil {
@@ -115,6 +134,10 @@ func (self *NetWidget) update() {
 
 		self.Lines[0].Data = append(self.Lines[0].Data, int(recentBytesRecv))
 		self.Lines[1].Data = append(self.Lines[1].Data, int(recentBytesSent))
+		if self.sentMetric != nil {
+			self.sentMetric.Add(float64(recentBytesSent))
+			self.recvMetric.Add(float64(recentBytesRecv))
+		}
 	}
 
 	// used in later calls to update
diff --git a/widgets/proc.go b/widgets/proc.go
index 9fed067..e4a8ace 100644
--- a/widgets/proc.go
+++ b/widgets/proc.go
@@ -100,6 +100,10 @@ func NewProcWidget() *ProcWidget {
 	return self
 }
 
+func (p *ProcWidget) EnableMetric() {
+	// There's (currently) no metric for this
+}
+
 func (self *ProcWidget) SetEditingFilter(editing bool) {
 	self.entry.SetEditing(editing)
 }
diff --git a/widgets/temp.go b/widgets/temp.go
index 7c0a358..ec0292e 100644
--- a/widgets/temp.go
+++ b/widgets/temp.go
@@ -7,16 +7,16 @@ import (
 	"time"
 
 	ui "github.com/gizak/termui/v3"
+	"github.com/prometheus/client_golang/prometheus"
 
 	"github.com/xxxserxxx/gotop/utils"
 )
 
-type TempScale int
+type TempScale rune
 
 const (
-	Celsius    TempScale = 0
-	Fahrenheit           = 1
-	Disabled             = 2
+	Celsius    TempScale = 'C'
+	Fahrenheit           = 'F'
 )
 
 type TempWidget struct {
@@ -27,6 +27,7 @@ type TempWidget struct {
 	TempLowColor   ui.Color
 	TempHighColor  ui.Color
 	TempScale      TempScale
+	tempsMetric    map[string]prometheus.Gauge
 }
 
 // TODO: state:deferred 156 Added temperatures for NVidia GPUs (azak-azkaran/master). Crashes on non-nvidia machines.
@@ -57,6 +58,20 @@ func NewTempWidget(tempScale TempScale) *TempWidget {
 	return self
 }
 
+func (self *TempWidget) EnableMetric() {
+	self.tempsMetric = make(map[string]prometheus.Gauge)
+	for k, v := range self.Data {
+		gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+			Namespace: "gotop",
+			Subsystem: "temp",
+			Name:      k,
+		})
+		gauge.Set(float64(v))
+		prometheus.MustRegister(gauge)
+		self.tempsMetric[k] = gauge
+	}
+}
+
 // Custom Draw method instead of inheriting from a generic Widget.
 func (self *TempWidget) Draw(buf *ui.Buffer) {
 	self.Block.Draw(buf)
@@ -86,19 +101,15 @@ func (self *TempWidget) Draw(buf *ui.Buffer) {
 		)
 
 		// TODO: state:merge #184 or #177 degree symbol (BartWillems/master, fleaz/master)
-		switch self.TempScale {
-		case Fahrenheit:
-			buf.SetString(
-				fmt.Sprintf("%3dF", self.Data[key]),
-				ui.NewStyle(fg),
-				image.Pt(self.Inner.Max.X-4, self.Inner.Min.Y+y),
-			)
-		case Celsius:
-			buf.SetString(
-				fmt.Sprintf("%3dC", self.Data[key]),
-				ui.NewStyle(fg),
-				image.Pt(self.Inner.Max.X-4, self.Inner.Min.Y+y),
-			)
+		if self.tempsMetric != nil {
+			self.tempsMetric[key].Set(float64(self.Data[key]))
 		}
+		temperature := fmt.Sprintf("%3d°%c", self.Data[key], self.TempScale)
+
+		buf.SetString(
+			temperature,
+			ui.NewStyle(fg),
+			image.Pt(self.Inner.Max.X-(len(temperature)-1), self.Inner.Min.Y+y),
+		)
 	}
 }