Switching case with buttons and use Mouse.move() to draw lines based on cases

Projects Programming
1

Hello everyone,

I am working on a mini project that draws line on Mircosoft Paint using a mouse, here is my setup:

  • Arduino Leonardo
  • USB host shield
  • A 2x2 push button
  • My mouse (connected to the USB host shield to the PC)

My goal for this project:

  1. Button 1: Draw a line from top to bottom based on the current mouse position when Mouse.IsPressed()
  2. Button 2: Draw a line from left to right based on the current mouse position when Mouse.IsPressed()
  3. Button 3: Draw a circle based on the current mouse position when Mouse.IsPressed()
  4. Button 4: Clears out everything so when Mouse.IsPressed() nothing will happen

The main obstacles right now, Mouse.move() will teleport my mouse cursor to the destination, I want it to perform in a more human-like way, is there a way to smooth out the transition of Mouse.move() from point A to point B?

Moreover, I am also struggling to draw a circle with smooth curve line...

Lastly, will there be a better/cleaner way to switch the case using the buttons?

Here is my code:

#include <Mouse.h>

#define STATE_verticalLine 0
#define STATE_horizontalLine 1
#define STATE_circleLine 2
#define STATE_neutral 3

const int firstButton = 2;
const int secondButton = 3;
const int thirdButton = 4;
const int fourthButton = 5;

int state = STATE_neutral;
int next_state = STATE_neutral;

void setup() {
  pinMode(firstButton, INPUT);
  pinMode(secondButton, INPUT);
  pinMode(thirdButton, INPUT);
  pinMode(fourthButton, INPUT);
  Mouse.begin();
}

//Draw a line from top to bottom based on the current mouse position when pressing the left click.
void verticalLine() {
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 3);
    delay(100); 
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 3);
    delay(100); 
  }
}

//Draw a line from left to right based on the current mouse position when pressing the left click.
void horizontalLine() {
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(3, 0);
    delay(100); 
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(3, 0);
    delay(100); 
  }
}

//Draw a circle based on the current mouse position when pressing the left click.
void circleLine() {
  if (Mouse.isPressed(MOUSE_LEFT)) {
    //Still trying to figure out how to draw a circle with smooth curve line.
  }
}

//Clears out everything so nothing will happen when left clicking.
void neutral() {
  if (Mouse.isPressed(MOUSE_LEFT)) {
    delay(1000);
  }
}

void stateSelect() {
  if (firstButton == HIGH) {
    next_state = STATE_verticalLine;
  }
  if (secondButton == HIGH) {
    next_state = STATE_horizontalLine;
  }
  if (thirdbutton == HIGH) {
    next_state = STATE_circleLine;
  }
  if (fourthButton == HIGH) {
    next_state = STATE_neutral;
  }

  state = next_state;

  switch (state) {
    case STATE_verticalLine:
      verticalLine();
      break;
    case STATE_horizontalLine:
      horizontalLine();
      break;
    case STATE_circleLine:
      circleLine();
      break;
    case STATE_neutral:
      neutral();
      break;
    default:
      neutral();
}

Any help is appreciated! Have a good one!

2

Welcome to the forum

Break the move into several smaller steps and introduce a delay between each smaller movement

3

So the best approach would be like this?

  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  }
  if (Mouse.isPressed(MOUSE_LEFT)) {
    Mouse.move(0, 1.5);
    delay(50);
  }
4

No

Detect the mouse press once then make a series of small mouse moves with a delay between each of them. A for loop would be useful here

Incidentally, the move() function takes integers as its parameters, not floats

5

Thank you for the reply, the result would be something like this?

void verticalLine() {
 if (Mouse.IsPressed(MOUSE_LEFT)) {
  for (int i = 0; i <= 8; i++) {
     Mouse.move(0, 1);
     delay(33);
  }
 }
}
6

Yes, something like that. You might like to pass parameters to the function to define things such as the number of steps or the delay

7
  • Will there be a better/cleaner way to switch the case using the buttons?
  • Any way to draw a circle with smooth curves?