1) You can find the layout files of the Cypress track pad shield from the following link. Please download "trackpad shield design files" from the link below which will give you the idea to build the layout for the trackpad.
2) For implementing the button matrix please go the link below and download "CY3280_Board_design_files" to get an idea on layout design for button matrix. We recommend you to use CapSense CSX for implementing button matrix.
Thanks and Regards,