sguptanj/ili9341_t3_controls

Graphical slider controls for TFT LCD type displays

Version 5.1 updated 11/24/2020

Slider Controls for Touchscreen Displays

This library will let programmers add graphkical objects such as 1) horizontal bar chart 2) vertical bar chart 3) cartesian graph 4) dial and 5) slider controlss to their projects. This library is intended to be used with ILI9341_t3 libraries and TFT LCD's that support touch. Typical applications are graphing temperatures, voltages, etc. as wel as providing UI controls for adjusting volume, brightness and on/off capability. Multiple controls can be added allow the UI creation par charts that report pin reads and sliders to adjust output levesl. Most of these objects support multiple ceation, location control, color control as other options.

While this library was created for the ILI9341_t3 and intended for Teensy-based MCU's, the library may be adaptable to other display drivers. Note the driver must use the Adafruit_GFX libraries. To allow other display drivers, modify the lines in the .h and .cpp files to allow a different driver to be passed in. For example change call such as SliderH(ILI9341_t3 *disp,... to SliderH(Adafruit_RA8875 *disp,...

This library also has controls for 1) buttons 2) check boxes and 3) option buttons

I have included a bonus example that shows how to create multi-screen interface

Revision history

1.0 initial code
2.0 added shapes and sizes for handles
3.0 fixed some repaint issues in CGraph, added marker support, added Button class with tons of methods
4.0 fixed bugs added Button, Checkbox, OptionButton classes
5.0 modified sliders, option and check to return true/false if pressed, and actual value stored in value property
5.1 added automatic "blank out" old handle support insided draw() method in sliderH and SliderV (really needed when a slide is redrawn based on input other than a finger slide (encoder)