xiekong issues

Results 3 issues of


                                            xiekong

![image](https://user-images.githubusercontent.com/16237228/62511231-4320fb80-b845-11e9-8db4-ad06d42091c3.png) go version 1.12.7

give some examples，please

window := ui.NewWindow(title, 600, 500, true) I want to create menu, but I don't know how to do it