图形视图流布局范例

见 流式布局范例 for a corresponding widget-based example.

文件：

• graphicsview/flowlayout/flowlayout.cpp
• graphicsview/flowlayout/flowlayout.h
• graphicsview/flowlayout/window.cpp
• graphicsview/flowlayout/window.h
• graphicsview/flowlayout/main.cpp
• graphicsview/flowlayout/flowlayout.pro