a qt garaphicsview base image viewer that can draw kinds of shape and free draw. still under development.
1. add more shape class .-------------------------------------------------------under development
2. shape style can load from json file------------------------------------------under development
3. create a shape registry to register shape class,and create shape by name.----under development
1. finish shapebase class .
2. finish shaperectangle class .
3. finish shapeline class .
4. link the create button to it's create function .