Using TouchControlOverlay

The code to interface with TouchControlOverlay is fairly minimal.

1. Create your callback functions. See the API Reference for the function signatures.

2. Call tco_initialize to create a context handle to use the library. You will need to pass in your current screen context and the struct of callback function pointers created in Step 1 to handle different inputs.

3. Load the controls by calling tco_loadcontrols and providing the XML file with the control information. If you have uploaded it as an asset in your application, it will be found at the relative path app/native/controls.xml.

4. Optionally, call tco_showlabels to show the labels on top of the main window.

5. In your input handling code, call tco_touch when you receive a touch event that you may want the library to handle. It will call the callback functions at this time. You may also wish to call tco_swipedown when a swipe down event occurs, if you wish to show the configuration window.

6. Call tco_shutdown when your application is shutting down.

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