Shulou(Shulou.com)06/03 Report--

one. Use signals and slots

two. Declare a pointer to a child window in the main window and use this pointer to call the function of the child window

Dialog * pic=new dialog ()

Pic- > getColor (QColor col)

Col can be transferred to the child window.

three. Declare variables with extern, and both windows can use the

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