bugfix: fix canvas empty gray zone.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
clear: clear some debug code.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
eh...nothing special
eh...sorry for that...
add: clear canvas locally.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
Merge branch 'master' of gitcafe.com:liuyanghejerry/painttyWidget into dev
add: send clear command to server.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
add: middle ware - Router, to easily control different command or request from network.
add: default size for canvas size inputs.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
minor changes.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>