fileselectdlg.go
func (d *FileSelectDialog) fileFitsMask(finfo os.FileInfo) bool {
	if finfo.IsDir() {
		return true
	}

	if d.selectDir {
		return false
	}

	if len(d.fileMasks) == 0 {
		return true
	}

	for _, msk := range d.fileMasks {
		if msk == "*" || msk == "*.*" {
			return true
		}

		matched, err := filepath.Match(msk, finfo.Name())
		if err == nil && matched {
			return true
		}
	}

	return false
}
func (d *FileSelectDialog) fileFitsMask(finfo os.FileInfo) bool {
	if finfo.IsDir() {
		return true
	}

	if d.selectDir {
		return false
	}

	if len(d.fileMasks) == 0 {
		return true
	}

	for _, msk := range d.fileMasks {
		if msk == "*" || msk == "*.*" {
			return true
		}

		matched, err := filepath.Match(msk, finfo.Name())
		if err == nil && matched {
			return true
		}
	}

	return false
}
// Checks if the file name matches the mask. Empty mask, *, and *.* match any file