view .hgtags @ 700:059e1fd05fd6 refactor-viewport-controller

Introduced the ViewportController that sits between the application and the Scene2D to handle the trackers and measuring tools. This is a work in progress. The Scene2D is no longer an observable. Message sending is managed by the ViewportController. Move some refs to shared and weak to prevent lifetime issues.
author Benjamin Golinvaux <bgo@osimis.io>
date Sun, 19 May 2019 16:26:17 +0200
parents ac4ad0cc6fc2
children 99628da4d846
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90f3a60576a9f08dcf783752a7f67ce0615a5371 rtviewer19