change canvas background dinamically

[mario_andres]

when i try to change the background of canvas dinamically, i receive an advert wich says: "cannot change configuration property 'backgroundimage'". My question is there any way to change the background image dinamically in a canvas?
I use this code to try to do that:
canvas.setBackgroundImage("background.jpg");

Thanks for your reply.

[Isomorphic]

That property should be settable and this has been corrected (will hit SVN in a few days). However, you're generally better of with a separate Img widget with 100% width and height, as a child of the Canvas.

[mario_andres]

thanks, I tried with the Img widget and works ok.

[ccocco]

setBackgroundImage()

Hi, I downloaded the latest SmartGWT zip file from SVN (2/3/10) and setBackgroundImage() no longer throws an exception when called after a Canvas is rendered. I can change the background image to a different one, but I cannot clear it. I use this technique in a TileGrid where I set the background to a watermark image and once the user drops an object onto it, I clear the watermark image from the background. I tried the following without success:

tileGrid.setBackgroundImage("");
tileGrid.markForRedraw();

tileGrid.setBackgroundImage(null);
tileGrid.markForRedraw();

[Isomorphic]

Try pointing to a blank image.

[ccocco]

Yes, I'm doing that as a work-around but I was hoping it would work correctly post-rendered. Thanks.

[akshaygehi]

Workaround:

private static class MyLabel extends Label {
public MyLabel(String string) {
super(string);
}

// Workaround for a SmartGWT bug
public void setBackgroundImage(String backgroundImage) {
setAttribute("backgroundImage", backgroundImage, true);
}
}