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C access to touchscreen events via simple graphics I/O

scudieremb

I recently bought your 7" touchscreen and it works great for a default screen.  But I want to write a graphic touchscreen display to control and display various RPi I/O.  How do I intercept and interpret touch events in my C code?  Also is there a simple app that lets me design a static graphic display with labeled buttons to accomplish entering and displaying the input values to the RPi I/O?  Perhaps something akin to the raspi-config command but with graphics & touch input instead of just text & mouse clicks.

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  • I ahve doen a few Graphical UIs on RPI touch screens and there were two easy ways to go: python and tkinter with a simple script to autostart on boot.
    Or HTML, much more often Html with some CSS runniongg in a frameless browser(chromium or FF in kiosk mode) was the best solution and was very flexible especially if the screen size might change later.
     You can directly code integrate html code into your C program and call the backend functions from there. In my application i used python as the backend and had a separate python script running the gui as a webserver that just got called as https://127.0.0.1 with the browser started on boot.
    You can do the same just with C as the backend.

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  • I ahve doen a few Graphical UIs on RPI touch screens and there were two easy ways to go: python and tkinter with a simple script to autostart on boot.
    Or HTML, much more often Html with some CSS runniongg in a frameless browser(chromium or FF in kiosk mode) was the best solution and was very flexible especially if the screen size might change later.
     You can directly code integrate html code into your C program and call the backend functions from there. In my application i used python as the backend and had a separate python script running the gui as a webserver that just got called as https://127.0.0.1 with the browser started on boot.
    You can do the same just with C as the backend.

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