How to click on a bubble graph?

I am using bubble graph. Please tell me how to click on the bubble. The HTML code for the graph is given below:

<canvas height="231" width="579" id="bubbleChart" style="display: block; width: 579px; height: 231px;" class="chartjs-render-monitor"></canvas>

Sorry to tell you, the content of a rendered canvas element is not available to WebUI methods.

You might try the Robot class:

Oh so there is no way out?