CancellableButton add-on for Vaadin

CancellableButton implements a Button that can be cancelled within a given delay. Until then a count down caption is presented to user.

Development instructions

1. Import to your favourite IDE
2. Run main method of the Server class to launch embedded web server that lists all your test UIs at http://localhost:9998
3. Code and test

• create UI's for various use cases for your add-ons, see examples. These can also work as usage examples for your add-on users.
• create browser level and integration tests under src/test/java/
• Browser level tests are executed manually from IDE (JUnit case) or with Maven profile "browsertests" (mvn verify -Pbrowsertests). The browsertests profile is enabled automatically for release builds

4. Test also in real world projects, e.g. create a demo project, build a snapshot release ("mvn install") and use the snapshot build in it.

GWT compilation

• To recompile test widgetset, issue mvn vaadin:compile, if you think the widgetset changes are not picked up by Vaadin plugin, do a mvn clean package or try with parameter mvn vaadin:compile -Dgwt.compiler.force=true
• To use superdevmode, issue "mvn vaadin:run-codeserver" and then just open superdevmode like with any other project

Creating releases

1. Push your changes to e.g. Github
2. Update pom.xml to contain proper SCM coordinates (first time only)
3. Use Maven release plugin (mvn release:prepare; mvn release:perform)
4. Upload the ZIP file generated to target/checkout/target directory to https://vaadin.com/directory service (and/or optionally publish your add-on to Maven central)