tiny-rdm/backend/services/system_service.go

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package services
import (
"context"
"github.com/wailsapp/wails/v2/pkg/runtime"
"log"
"sync"
"time"
"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
}
// 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)
}
}
}
}