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I want to know how i can make a custom window like that (Photoshop):
Look the close, widgets:
You need to either turn off system frame and implement your own (a lot of work), or use platform-specific APIs to do it separately on each supported window manager (a lot of work + not cross-platform). At least that is my current understanding of the matter.
Can anyone give me examples, documentation or something to help me?
I searched and found nothing.
Also search the forums and web for keywords like "non-client painting" or "WM_NCPAINT" if you're interested in windows. There's a lot of material about it although not very Qt related since this is always platform dependent task.
Maybe putting the window as splash screen and manipulating events like drag form, resizing, among others. (a difficult job)
I'll try, new post soon.