What does Qt uses to render GUI ?
Is it that qtcore and qtgui have been written using X11 API or they use GTK+ framework at the backend.
1-What is difference b/w X11 and wayland. Is wayland better? And you mean to say that Qt gui is different than GTK+ framework. But they look exactly similar, i mean widgets.
2- X11 is the default windowing system for Linux, so does this mean Qt5 apps will have additional dependency of downloading and installing wayland. Does Qt-Wayland has similar look of widgets as GTK+ as GTK+ uses X11, or they will look different. Perhaps i asked too many questions!
Note that there is a Qt GTK style, to make Qt applications look like GTK applications. I believe there is a similar idea the other way around, a GTK style that mimics the default Qt style.
For information about Wayland, you could start [en.wikipedia.org]) at wikipedia.