Major restructure and added a few example plugins.

examples/cpu/Makefile

@@ -0,0 +1,21 @@
+GO = go
+GOFLAGS =
+INSTALLDIR = "$(APPDATA)\Elgato\StreamDeck\Plugins\dev.samwho.streamdeck.cpu.sdPlugin"
+LOGDIR = "$(APPDATA)\Elgato\StreamDeck\logs"
+
+.PHONY: test install build logs
+
+build:
+	$(GO) build $(GOFLAGS)
+
+test:
+	$(GO) run $(GOFLAGS) main.go -port 12345 -pluginUUID 213 -registerEvent test -info "{\"application\":{\"language\":\"en\",\"platform\":\"mac\",\"version\":\"4.1.0\"},\"plugin\":{\"version\":\"1.1\"},\"devicePixelRatio\":2,\"devices\":[{\"id\":\"55F16B35884A859CCE4FFA1FC8D3DE5B\",\"name\":\"Device Name\",\"size\":{\"columns\":5,\"rows\":3},\"type\":0},{\"id\":\"B8F04425B95855CF417199BCB97CD2BB\",\"name\":\"Another Device\",\"size\":{\"columns\":3,\"rows\":2},\"type\":1}]}"
+
+install: build
+	rm -rf $(INSTALLDIR)
+	mkdir $(INSTALLDIR)
+	cp *.json $(INSTALLDIR)
+	cp *.exe $(INSTALLDIR)
+
+logs:
+	tail -f $(LOGDIR)/cpu.log

examples/cpu/main.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"image"
+	"image/color"
+	"log"
+	"os"
+	"time"
+
+	"github.com/samwho/streamdeck/payload"
+
+	"github.com/samwho/streamdeck"
+	sdcontext "github.com/samwho/streamdeck/context"
+	"github.com/shirou/gopsutil/cpu"
+)
+
+const (
+	logFile = "C:\\Users\\samwh\\AppData\\Roaming\\Elgato\\StreamDeck\\logs\\cpu.log"
+
+	imgX = 72
+	imgY = 72
+)
+
+func main() {
+	f, err := os.OpenFile(logFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatalf("error opening file: %v", err)
+	}
+	defer f.Close()
+	log.SetOutput(f)
+
+	ctx := context.Background()
+	if err := run(ctx); err != nil {
+		log.Fatalf("%v\n", err)
+	}
+}
+
+func run(ctx context.Context) error {
+	params, err := streamdeck.ParseRegistrationParams(os.Args)
+	if err != nil {
+		return err
+	}
+
+	client := streamdeck.NewClient(ctx, params)
+	setup(client)
+
+	return client.Run()
+}
+
+func setup(client *streamdeck.Client) {
+	action := client.Action("dev.samwho.streamdeck.cpu")
+
+	contexts := make(map[string]struct{})
+
+	action.RegisterHandler(streamdeck.WillAppear, func(ctx context.Context, client *streamdeck.Client, event streamdeck.Event) error {
+		contexts[event.Context] = struct{}{}
+		return nil
+	})
+
+	action.RegisterHandler(streamdeck.WillDisappear, func(ctx context.Context, client *streamdeck.Client, event streamdeck.Event) error {
+		delete(contexts, event.Context)
+		return nil
+	})
+
+	readings := make([]float64, imgX, imgX)
+
+	go func() {
+		for range time.Tick(time.Second) {
+			for i := 0; i < imgX-1; i++ {
+				readings[i] = readings[i+1]
+			}
+
+			r, err := cpu.Percent(0, false)
+			if err != nil {
+				log.Printf("error getting CPU reading: %v\n", err)
+			}
+			readings[imgX-1] = r[0]
+
+			for ctxStr := range contexts {
+				ctx := context.Background()
+				ctx = sdcontext.WithContext(ctx, ctxStr)
+
+				img, err := streamdeck.Image(graph(readings))
+				if err != nil {
+					log.Printf("error creating image: %v\n", err)
+					continue
+				}
+
+				if err := client.SetImage(ctx, img, payload.HardwareAndSoftware); err != nil {
+					log.Printf("error setting image: %v\n", err)
+					continue
+				}
+
+				if err := client.SetTitle(ctx, fmt.Sprintf("CPU\n%d%%", int(r[0])), payload.HardwareAndSoftware); err != nil {
+					log.Printf("error setting title: %v\n", err)
+					continue
+				}
+			}
+		}
+	}()
+}
+
+func graph(readings []float64) image.Image {
+	img := image.NewRGBA(image.Rect(0, 0, imgX, imgY))
+	for x := 0; x < imgX; x++ {
+		reading := readings[x] / 100
+		upto := int(float64(imgY) * reading)
+		for y := 0; y < upto; y++ {
+			img.Set(x, imgY-y, color.RGBA{R: 255, A: 255})
+		}
+		for y := upto; y < imgY; y++ {
+			img.Set(x, imgY-y, color.Black)
+		}
+	}
+	return img
+}

examples/cpu/manifest.json

@@ -0,0 +1,37 @@
+{
+  "Actions": [
+    {
+      "Name": "CPU graph",
+      "States": [
+        {
+          "TitleAlignment": "middle",
+          "FontSize": "14"
+        }
+      ],
+      "SupportedInMultiActions": false,
+      "Tooltip": "Show a pretty little CPU graph",
+      "UUID": "dev.samwho.streamdeck.cpu"
+    }
+  ],
+  "SDKVersion": 2,
+  "Author": "Sam Rose",
+  "CodePath": "cpu.exe",
+  "Description": "Show a pretty little CPU graph",
+  "Name": "CPU graph",
+  "URL": "https://samwho.dev",
+  "Version": "0.1",
+  "OS": [
+    {
+        "Platform": "mac",
+        "MinimumVersion" : "10.11"
+    },
+    {
+        "Platform": "windows",
+        "MinimumVersion" : "10"
+    }
+  ],
+  "Software":
+    {
+        "MinimumVersion" : "4.1"
+    }
+}