java - Resize Canvas in GWT having a d3 svg in the div -

i drawing 4 d3 line charts in canvas category layer , have canvas , div list categories below

private arraylist<canvas> catcanvaslist; private arraylist<element> catdivlist; private int categorycount = 0; vlayout categorylayer;  catcanvaslist = new arraylist<canvas>(); catdivlist = new arraylist<element>(); categorycount = data.getcategories().size();  (int = 0; < categorycount; i++) {     canvas cat = new canvas();     cat.setwidth100();     cat.setheight100();     categorylayer.addmember(cat);     catcanvaslist.add(cat); }   int a= 0;  for( final string key: data.getcategories()){     final canvas c = catcanvaslist.get(a);    final element div = dom.creatediv();    catdivlist.add(div);     created3vis(div,key,data);    a++ } 

on window resize redarw d3 vis in following way

 categorylayer.addresizedhandler(new resizedhandler() {              @override             public void onresized(resizedevent event) {                  if (!catdivlist.isempty() && !catcanvaslist.isempty()) {                     (element div : catdivlist) {                         div.removefromparent();                      }                      catdivlist.clear();                      for(final canvas c:catcanvaslist){                         c.getdom().removeallchildren();                     }                 }    int a= 0;     for( final string key: data.getcategories()){     final canvas c = catcanvaslist.get(a);    final element div = dom.creatediv();    catdivlist.add(div);     created3vis(div,key,data);    a++ } } }); 

but above mentioned way not work on resize , not remove div elemets properly.

i want resize canvas on window resize , redraw d3 vis new height , width.

can point me i'm going wrong.