I have just found an example (http://c.gwt-examples.com/home/ui/canvas).
The only problem is to convert ImageData to an byte array :) Regards! 2016-01-25 12:08 GMT-02:00 Julio Heitor Nobrega <[email protected]>: > Does anyone have some examples regarding the Canvas class? > > I've seen the java doc API but the only methods i think that could be > useful was: > > Context2d > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/dom/client/Context2d.html> > *getContext2d > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#getContext2d%28%29>* > () > Returns a 2D rendering context. > void *setCoordinateSpaceHeight > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#setCoordinateSpaceHeight%28int%29>* > (int height) > Sets the height of the internal canvas coordinate space. > void *setCoordinateSpaceWidth > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#setCoordinateSpaceWidth%28int%29>* > (int width) > Sets the width of the internal canvas coordinate space. > > 2016-01-14 16:36 GMT-02:00 Kirill Prazdnikov <[email protected]>: > >> Canvas is an DOM Element. >> It can render Image Elements to itself in any resolution. >> However it may produce not nice results. >> >> It depends on what you need. >> >> On Thursday, January 14, 2016 at 9:17:36 PM UTC+3, Julio Heitor Nobrega >> wrote: >>> >>> Hi guys, >>> >>> thanks everyone for the answers! >>> >>> Greg, is Canvas a GWT framework or its a class that belong to GWT >>> itself? >>> >>> Do you have any example of use? >>> >>> Regards >>> >>> >>> >>> Em quinta-feira, 14 de janeiro de 2016 11:25:29 UTC-2, Julio Heitor >>> Nobrega escreveu: >>>> >>>> Hi guys, >>>> >>>> i am trying to upload images with 2mb size but i don't want to send the >>>> whole original image to the server. >>>> >>>> What i would like to do is reduce the image dimensions from, for >>>> example, *1000x1000* to *50x50* and reduce the file size >>>> from *2mb* to *~25kb* as well and at the end send the *~25kb* image to >>>> the server. >>>> >>>> I know there is the Scalr framework that does that in java, but its no >>>> compatible with GWT clients. >>>> >>>> Is there any client side GWT library that does the same thing as Scalr? >>>> >>>> Best Regards! >>>> >>>> >>>> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "GWT Users" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/google-web-toolkit/8OfazCLtcLA/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/google-web-toolkit. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
