Touchscreen Draw

This example demonstrates how to draw on the screen using the capacitive touchscreen on Inkplate 6Flick. By dragging your finger across the screen, lines are drawn in real time, allowing basic interaction with the display.

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Example Overview

This example checks for touch input and draws lines between the last touch position and the current one. You can use your finger or a stylus to draw directly onto the e-paper display.

/*
    Inkplate6FLICK_Touchscreen_Draw example for Soldered Inkplate 6Flick

    This example shows how to draw with your finger on the touchscreen.

    Select "Soldered Inkplate 6Flick" from Tools -> Board menu.

    Want to learn more about Inkplate? Visit www.inkplate.io
    Looking to get support? Write on our forums: https://forum.soldered.com/
*/

#include "Inkplate.h"

Inkplate display; // Create Inkplate display object

int x, y, oldX = -1, oldY = -1;

void setup()
{
    display.begin();               // Initialize display and touchscreen
    display.clearDisplay();        // Clear display buffer
    display.display();             // Apply blank frame to screen
}

void loop()
{
    // Read current finger position
    if (display.touchDetected()) // Check if touchscreen is being touched
    {
        display.touchCoordinates(&x, &y); // Get touch coordinates

        if (oldX != -1 && oldY != -1)
        {
            // Draw a line from previous to current point
            display.drawLine(oldX, oldY, x, y, BLACK);
        }

        oldX = x;
        oldY = y;

        display.partialUpdate(); // Update the area that was drawn
    }
    else
    {
        // Reset the old coordinates if no touch
        oldX = -1;
        oldY = -1;
    }
}

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touchDetected()

Returns true if the capacitive touchscreen detects input.

Returns type: bool

touchCoordinates()

Gets the X and Y position of the last touch point.

Returns type: void

Function parameters:

Type	Name	Description
int*	x	Pointer to store the X coordinate
int*	y	Pointer to store the Y coordinate

partialUpdate()

Refreshes only the updated section of the screen to save power and time.

Returns type: void

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Notes

• The touchscreen on Inkplate 6Flick is a capacitive touch sensor that works best with bare fingers.
• partialUpdate() allows fast screen refreshes while interacting, avoiding full refresh flashes.

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Full Example

You can find the complete example in the Inkplate Arduino library here:

Inkplate6FLICK_Touchscreen_Draw

Touchscreen drawing demo for Inkplate 6Flick.