change config UseSystemFonts to CustomFonts, allow user to specify which font to use

gui/gui.go

@@ -35,8 +35,8 @@ func Initialize() {
 	logger = global.Logger.WithPrefix("GUI")
 	black_magic()
 	logger.Info("Initializing GUI")
-	if !config.General.UseSystemFonts {
-		_ = os.Setenv("FYNE_FONT", config.GetAssetPath("msyh.ttc"))
+	if config.General.CustomFonts != "" {
+		_ = os.Setenv("FYNE_FONT", config.GetAssetPath(config.General.CustomFonts))
 	}
 	App = app.NewWithID(config.ProgramName)
 	//App.Settings().SetTheme(&myTheme{})

pkg/config/config_general.go

@@ -11,8 +11,8 @@ type _GeneralConfig struct {
 	PlayNextOnFail    bool
 	UseSystemPlaylist bool
 	FixedSize         bool
-	EnableSMC         bool // enable system media control
-	UseSystemFonts    bool // using system fonts
+	EnableSMC         bool   // enable system media control
+	CustomFonts       string // use custom fonts, under ./assets file
 
 }
 
@@ -31,5 +31,5 @@ var General = &_GeneralConfig{
 	UseSystemPlaylist: true,
 	FixedSize:         true,
 	EnableSMC:         true,
-	UseSystemFonts:    true,
+	CustomFonts:       "",
 }