package services import ( "context" "github.com/wailsapp/wails/v2/pkg/runtime" "log" "sync" "time" "tinyrdm/backend/consts" "tinyrdm/backend/types" ) type systemService struct { ctx context.Context } var system *systemService var onceSystem sync.Once func System() *systemService { if system == nil { onceSystem.Do(func() { system = &systemService{} go system.loopWindowEvent() }) } return system } func (s *systemService) Start(ctx context.Context) { s.ctx = ctx // maximize the window if screen size is lower than the minimum window size if screen, err := runtime.ScreenGetAll(ctx); err == nil && len(screen) > 0 { for _, sc := range screen { if sc.IsCurrent { if sc.Size.Width < consts.MIN_WINDOW_WIDTH || sc.Size.Height < consts.MIN_WINDOW_HEIGHT { runtime.WindowMaximise(ctx) break } } } } } // SelectFile open file dialog to select a file func (s *systemService) SelectFile(title string) (resp types.JSResp) { filepath, err := runtime.OpenFileDialog(s.ctx, runtime.OpenDialogOptions{ Title: title, ShowHiddenFiles: true, }) if err != nil { log.Println(err) resp.Msg = err.Error() return } resp.Success = true resp.Data = map[string]any{ "path": filepath, } return } func (s *systemService) loopWindowEvent() { var fullscreen, maximised, minimised, normal bool var width, height int var dirty bool for { time.Sleep(300 * time.Millisecond) if s.ctx == nil { continue } dirty = false if f := runtime.WindowIsFullscreen(s.ctx); f != fullscreen { // full-screen switched fullscreen = f dirty = true } if w, h := runtime.WindowGetSize(s.ctx); w != width || h != height { // window size changed width, height = w, h dirty = true } if m := runtime.WindowIsMaximised(s.ctx); m != maximised { maximised = m dirty = true } if m := runtime.WindowIsMinimised(s.ctx); m != minimised { minimised = m dirty = true } if n := runtime.WindowIsNormal(s.ctx); n != normal { normal = n dirty = true } if dirty { runtime.EventsEmit(s.ctx, "window_changed", map[string]any{ "fullscreen": fullscreen, "width": width, "height": height, "maximised": maximised, "minimised": minimised, "normal": normal, }) if !fullscreen && !minimised { // save window size Preferences().SaveWindowSize(width, height, maximised) } } } }