Here is an example showing a more dynamic use of Wt's vector
Wt's WPaintedWidget renders as SVG, VML or HTML5
graphics depending on the capabilities of the browser. The
backend decides how to render the graphics, the application
programmer has to draw his graphics using the available methods
in the WPainter API. The drawing primitives include
points, lines, arcs, cubic splines, text, etc.
The update() method of WPaintedWidget is called with
the PaintUpdate rendering flag to update the canvas without
clearing the previously painted contents (which is the default behavior).
Every mouse drag operation on the simple painting device is sent to the
server, which in turn updates the canvas. You could imagine more
interesting use cases, such as a multi-user white board, or interactive