Class Hierarchy
This inheritance list is sorted roughly, but not completely, alphabetically:

NexGpio | NexGpio component
NexObject | Root class of all Nextion components
NexGauge | NexGauge component
NexProgressBar | NexProgressBar component
NexTouch | Father class of the components with touch events
NexButton | NexButton component
NexCheckbox | NexButton component
NexCrop | NexCrop component
NexDSButton | NexDSButton component
NexHotspot | NexHotspot component
NexNumber | NexNumber component
NexPage | A special component , which can contain other components such as NexButton, NexText and NexWaveform, etc
NexPicture | NexPicture component
NexRadio | NexRadio component
NexScrolltext | NexText component
NexSlider | NexSlider component
NexText | NexText component
NexTimer | NexTimer component
NexVariable | NexButton component
NexWaveform | NexWaveform component
NexRtc | NexRtc component
NexUpload | Provides the API for nextion to download the ftf file