parent
4dd2f9dd57
commit
0b09b37039
@ -1,86 +1,96 @@
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const canvas = document.getElementById('canvas');
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const increaseBtn = document.getElementById('increase');
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const decreaseBtn = document.getElementById('decrease');
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const sizeEL = document.getElementById('size');
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const colorEl = document.getElementById('color');
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const clearEl = document.getElementById('clear');
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const canvas = document.getElementById("canvas");
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const increaseBtn = document.getElementById("increase");
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const decreaseBtn = document.getElementById("decrease");
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const sizeEL = document.getElementById("size");
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const colorEl = document.getElementById("color");
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const clearEl = document.getElementById("clear");
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const ctx = canvas.getContext('2d');
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const ctx = canvas.getContext("2d");
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let size = 10
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let isPressed = false
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colorEl.value = 'black'
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let color = colorEl.value
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let x
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let y
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let size = 10;
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let isPressed = false;
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colorEl.value = "black";
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let color = colorEl.value;
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let x;
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let y;
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canvas.addEventListener('mousedown', (e) => {
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isPressed = true
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canvas.addEventListener("mousedown", (e) => {
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isPressed = true;
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x = e.offsetX
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y = e.offsetY
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})
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x = e.offsetX;
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y = e.offsetY;
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});
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canvas.addEventListener('mouseup', (e) => {
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isPressed = false
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canvas.addEventListener("mouseup", (e) => {
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isPressed = false;
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x = undefined
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y = undefined
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})
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x = undefined;
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y = undefined;
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});
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canvas.addEventListener('mousemove', (e) => {
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canvas.addEventListener("mousemove", (e) => {
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if (isPressed) {
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const x2 = e.offsetX
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const y2 = e.offsetY
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const x2 = e.offsetX;
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const y2 = e.offsetY;
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drawCircle(x2, y2)
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drawLine(x, y, x2, y2)
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drawCircle(x2, y2);
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drawLine(x, y, x2, y2);
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x = x2
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y = y2
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x = x2;
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y = y2;
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}
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})
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});
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//draw dot when clicked
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canvas.addEventListener("click", (e) => {
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x = e.offsetX;
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y = e.offsetY;
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drawCircle(x, y);
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});
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function drawCircle(x, y) {
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ctx.beginPath();
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ctx.arc(x, y, size, 0, Math.PI * 2)
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ctx.fillStyle = color
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ctx.fill()
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ctx.arc(x, y, size, 0, Math.PI * 2);
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ctx.fillStyle = color;
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ctx.fill();
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}
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function drawLine(x1, y1, x2, y2) {
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ctx.beginPath()
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ctx.moveTo(x1, y1)
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ctx.lineTo(x2, y2)
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ctx.strokeStyle = color
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ctx.lineWidth = size * 2
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ctx.stroke()
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ctx.beginPath();
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ctx.moveTo(x1, y1);
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ctx.lineTo(x2, y2);
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ctx.strokeStyle = color;
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ctx.lineWidth = size * 2;
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ctx.stroke();
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}
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function updateSizeOnScreen() {
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sizeEL.innerText = size
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sizeEL.innerText = size;
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}
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increaseBtn.addEventListener('click', () => {
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size += 5
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increaseBtn.addEventListener("click", () => {
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size += 5;
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if (size > 50) {
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size = 50
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size = 50;
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}
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updateSizeOnScreen()
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})
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updateSizeOnScreen();
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});
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decreaseBtn.addEventListener('click', () => {
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size -= 5
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decreaseBtn.addEventListener("click", () => {
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size -= 5;
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if (size < 5) {
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size = 5
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size = 5;
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}
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updateSizeOnScreen()
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})
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updateSizeOnScreen();
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});
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colorEl.addEventListener('change', (e) => color = e.target.value)
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colorEl.addEventListener("change", (e) => (color = e.target.value));
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clearEl.addEventListener('click', () => ctx.clearRect(0,0, canvas.width, canvas.height))
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clearEl.addEventListener("click", () =>
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ctx.clearRect(0, 0, canvas.width, canvas.height)
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);
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