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main.go
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main.go
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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"time"
"github.com/kbinani/screenshot"
"github.com/reujab/wallpaper"
)
func handleWallpaperChange(num int) {
fmt.Println("Number of active monitor(s) : ", num)
ex, err := os.Executable()
if err != nil {
panic(err)
}
path := filepath.Dir(ex)
fmt.Println(path)
plan, _ := ioutil.ReadFile(path + "/data.json")
var data map[string]interface{}
err = json.Unmarshal(plan, &data)
if(err != nil) {
fmt.Println("Error reading file")
}
fmt.Println("JSON data", data)
key := strconv.Itoa(num)
wallpaperToSet := data[key].(string)
wallpaperPath := path + "/wallpapers/" + wallpaperToSet
fmt.Println("Wallpaper to set", wallpaperPath)
// Can assign wallpapers based on dimensions later
// for i := 0; i < num; i++ {
// bounds := screenshot.GetDisplayBounds(i)
// x := bounds.Dx()
// y := bounds.Dy()
// fmt.Printf("Display #%d resolution is %d x %d\n", i, x, y)
// }
err = wallpaper.SetFromFile(wallpaperPath)
if err != nil {
fmt.Println("Error getting wallpaper", err)
}
fmt.Println("Wallpaper Updated")
}
func main() {
ch := make(chan int)
exit:= make(chan bool)
go func() {
for {
numDisplays := screenshot.NumActiveDisplays()
ch <- numDisplays
time.Sleep(5 * time.Second)
}
exit<-true // Notify main() that this goroutine has finished
}()
go func() {
lastNum := 0
for {
select {
case num := <-ch:
if(num != lastNum) {
handleWallpaperChange(num)
}
lastNum = num
break
}
}
}()
<-exit // This blocks until the exit channel receives some input
fmt.Println("Done.")
}