First you need to get the data from the canvas so you can save that. Use this method: http://google-web-toolkit.googlecode.com/svn/javadoc/2.2/com/google/gwt/canvas/client/Canvas.html#toDataUrl%28%29
Now for session you have 2 options: 1) You can transmit this data to your server in an http call, and then save that into a database or file - cookie will not work, as the image data will be too large for a cookie. 2) You can save the data in HTML5 local storage: https://developers.google.com/web-toolkit/doc/latest/DevGuideHtml5Storage On Monday, January 7, 2013 4:57:27 PM UTC+2, membersound wrote: > > Hi, > > I'm creating a canvas where the user can draw some elements himself. > > Is it possible with GWT to preserve the user session somehow? And if he > refreshes the browser, all his drawings should be still there / beeing > recreated? > Coming from JSF I'd just use @SessionScoped, but how can this be done > gwt, if ever? > > Thanks > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/vluEHgKNfSkJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
