Canvas Widget

Flow
1

Hi,

I’ve been playing with the Canvas add-on created by Henri Muurimaa.

I created a small test app using Henri’s example

            Canvas canvas = new Canvas();
	canvas.setSizeFull();
	canvas.setBackgroundColor("#002200");
	canvas.setStrokeColor("#aaaaff");
	canvas.saveContext();
	canvas.arc(100, 90, 50, 0, Math.PI, true);
	canvas.stroke();
	canvas.beginPath();

	canvas.restoreContext();
	canvas.arc(75, 30, 20, 0, Math.PI, false);
	canvas.arc(125, 30, 20, 0, Math.PI, false);
	canvas.stroke();

this works fine when viewed in firefox, I get Henri’s smiley face :smiley: but not in internet explorer 8 - I only get the backgroud color?

My lib folder contains

canvaswidget-1.0.1.jar
gwt-graphics-0.9.7.jar
gwt-incubator-20100204-r1747.jar
vaadin-6.4.0.jar

the widget set compliation works ok.

has anyone any ideas as to why - this has me stumped?

thanks for your time

regards,

Patrick

2

IE8 is not in the widget’s compatibility list. I believe it is due to the fact tha IE8 does not support HTML5 canvas :wink:

3

Ah nuts! I missed that class entitled “IE8 sucks because”

thanks for the quick reply Michal

4

That’s right. Hoping that HTML5 canvas support in IE9 won’t be crippled like some rumors lead to expect…

5

From what I’ve read about IE9 it won’t be supported on XP

a huge amount of business users are still using XP - me thinks it’s more a marketing decision that a technical one from Microsoft… bah!

6

we can use the compatibility view option in ie8 to view the canvas sample output.