Initial GoWallpaper implementation

main.go

@@ -0,0 +1,66 @@
+//go:build windows
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"path/filepath"
+
+	"github.com/lxn/walk"
+	"golang.org/x/sys/windows"
+)
+
+func main() {
+	mutex, alreadyRunning, err := acquireSingleInstance()
+	if err != nil {
+		showNativeMessage(appName, "无法检查程序运行状态："+err.Error())
+		return
+	}
+	defer windows.CloseHandle(mutex)
+	if alreadyRunning {
+		showNativeMessage(appName, "GoWallpaper 已经运行，请使用右下角托盘图标。")
+		return
+	}
+
+	appDir, err := appDirectory()
+	if err != nil {
+		showNativeMessage(appName, err.Error())
+		return
+	}
+	cfg, firstRun, err := loadOrCreateConfig(filepath.Join(appDir, configFileName))
+	if err != nil {
+		showNativeMessage(appName, err.Error())
+		return
+	}
+	cache, err := loadCacheIndex(filepath.Join(appDir, "cache"))
+	if err != nil {
+		showNativeMessage(appName, err.Error())
+		return
+	}
+	if cfg.StartWithWindows {
+		if err := setStartWithWindows(true); err != nil {
+			showNativeMessage(appName, err.Error())
+		}
+	}
+
+	mw, err := walk.NewMainWindow()
+	if err != nil {
+		log.Printf("创建消息窗口失败: %v", err)
+		showNativeMessage(appName, fmt.Sprintf("程序启动失败：%v", err))
+		return
+	}
+	defer mw.Dispose()
+	app, err := newApp(mw, appDir, cfg, cache)
+	if err != nil {
+		showNativeMessage(appName, fmt.Sprintf("创建托盘图标失败：%v", err))
+		return
+	}
+	defer func() {
+		if !app.closing.Load() {
+			app.close()
+		}
+	}()
+	app.start(firstRun)
+	mw.Run()
+}