how to drag an image around on the canvas?

[bhomass]

I am able to draw an image, then re-draw in the new mouse postion, but the image remains in the last positions, so it smears all over the canvas. I don't see a method for remove the last draw image, and I don't want to call clear() to clear the entire canvas. Please advice how to accomplish this.

[martinRenou]

I don't want to call clear() to clear the entire canvas

You can use clear_rect for removing part of the canvas.

[bhomass]

thank you. worked!