How to create a ctrl+z event on the canvas?

@tressie.damore 

To create a ctrl+z event on the canvas, you can follow these steps:

1. Add an event listener to the canvas element for the keydown event.
2. Check if the event.key is equal to "z" and if the event.ctrlKey is true (meaning the control key is pressed).
3. If both conditions are met, perform the undo action on the canvas (such as reverting the last action, drawing or clearing).
4. You can keep track of the actions performed on the canvas using an array or stack data structure.
5. When the ctrl+z event is triggered, pop the last action from the array/stack and redraw the canvas accordingly.

Here is an example code snippet in JavaScript:

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const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');
let actions = [];

canvas.addEventListener('keydown', function(event) {
  if (event.key === 'z' && event.ctrlKey) {
    undoAction();
  }
});

function undoAction() {
  if (actions.length > 0) {
    actions.pop(); // Remove the last action
    redrawCanvas();
  }
}

function redrawCanvas() {
  // Clear the canvas
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  // Redraw all the actions in the array
  actions.forEach(action => {
    // Perform the action (e.g. redraw a shape)
  });
}

This is just a basic example and you may need to adapt it to your specific use case and functionality. You can also implement a redo function similarly to handle redoing actions on the canvas.