Get co-ordinates of mouse click in Gazebo

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Hi, Is there a way to get the coordinates of a point (x and y coordinates) using the mouse on the gazebo client? Best, I want to be able to read in the cps tester coordinates of a mouse click - preferably using a service, but subscribing to a topic would do - into The position of x-coordinate of the mouse click is found by subtracting the event's x position with the bounding rectangle's x position. The x position of the event is found using the 'clientX' property. The x position of the canvas element, i.e. the left side of the rectangle can be found using the 'left' property.