Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Format style.

Change Tab to space.

Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
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Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Signed-off-by: mdrtwell <tracy3fan@gmail.com>
Build Module node.

Module node has title,rectangle,parent node.
Module can drag.
Parent node can connect to parent node.
Mouse enter and exit interact user.

Signed-off-by: mdrtwell <tracy3fan@gmail.com>
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