Add snapshot capability
This commit is contained in:
parent
60b0b785fc
commit
4c4372833e
|
@ -54,6 +54,8 @@
|
|||
|
||||
|
||||
<template id="x-widget-template">
|
||||
<script src="https://cdn.jsdelivr.net/npm/html2canvas@1.0.0-rc.5/dist/html2canvas.min.js"></script>
|
||||
|
||||
<style>
|
||||
@import url("https://fonts.googleapis.com/css2?family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200");
|
||||
@import url("https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200");
|
||||
|
@ -403,7 +405,6 @@
|
|||
}
|
||||
|
||||
#canvas-snapshot {
|
||||
border: 2px solid green;
|
||||
position: fixed;
|
||||
left: 0px;
|
||||
top: 0px;
|
||||
|
@ -513,9 +514,8 @@
|
|||
#icon;
|
||||
#form;
|
||||
#canvas;
|
||||
#canvasCtx;
|
||||
#location;
|
||||
#pointerDown;
|
||||
#moving;
|
||||
|
||||
constructor() {
|
||||
super();
|
||||
|
@ -525,10 +525,9 @@
|
|||
|
||||
this.#icon = this.#createIcon();
|
||||
this.#form = this.#createForm();
|
||||
this.#canvas = shadowRoot.getElementById("canvas-snapshot");
|
||||
this.#canvas = this.#createCanvas();
|
||||
this.#canvasCtx = this.#canvas.getContext("2d");
|
||||
|
||||
this.#pointerDown = false;
|
||||
this.#moving = false;
|
||||
this.#location = "bottom-right";
|
||||
}
|
||||
|
||||
|
@ -552,9 +551,26 @@
|
|||
icon.addEventListener("pointerover", (e) => this.#onIconPointerOver(e));
|
||||
icon.addEventListener("pointerout", (e) => this.#onIconPointerOut(e));
|
||||
|
||||
icon.pointerDown = false;
|
||||
icon.moving = false;
|
||||
|
||||
return icon;
|
||||
}
|
||||
|
||||
#createCanvas() {
|
||||
let canvas = this.shadowRoot.getElementById("canvas-snapshot");
|
||||
|
||||
canvas.addEventListener("pointerdown", (e) => this.#onCanvasPointerDown(e));
|
||||
canvas.addEventListener("pointermove", (e) => this.#onCanvasPointerMove(e));
|
||||
canvas.addEventListener("pointerup", async (e) => await this.#onCanvasPointerUpAsync(e));
|
||||
|
||||
canvas.pointerDown = null;
|
||||
canvas.initialX = null;
|
||||
canvas.initialY = null;
|
||||
|
||||
return canvas;
|
||||
}
|
||||
|
||||
#createForm() {
|
||||
let form = this.shadowRoot.getElementById("form");
|
||||
|
||||
|
@ -684,9 +700,152 @@
|
|||
#onsnapshotButtonClicked(e) {
|
||||
this.#renderIcon({visibility: "visible"});
|
||||
this.#renderForm({visibility: "hidden"});
|
||||
|
||||
this.#setBlankCanvas();
|
||||
this.#canvas.classList.add("visible");
|
||||
}
|
||||
|
||||
#setBlankCanvas() {
|
||||
this.#canvas.width = this.#canvas.clientWidth;
|
||||
this.#canvas.height = this.#canvas.clientHeight;
|
||||
|
||||
this.#canvasCtx.clearRect(0, 0, this.#canvas.width, this.#canvas.height);
|
||||
|
||||
this.#canvasCtx.globalAlpha = 0.5;
|
||||
this.#canvasCtx.fillStyle = "white";
|
||||
this.#canvasCtx.beginPath();
|
||||
this.#canvasCtx.rect(0, 0, this.#canvas.width, this.#canvas.height);
|
||||
this.#canvasCtx.fill();
|
||||
this.#canvasCtx.closePath();
|
||||
|
||||
this.#setCanvasBrush("red");
|
||||
}
|
||||
|
||||
#setCanvasBrush(colour) {
|
||||
this.#canvasCtx.globalAlpha = 1;
|
||||
this.#canvasCtx.strokeStyle = colour;
|
||||
}
|
||||
|
||||
#onCanvasPointerDown(e) {
|
||||
if (e.button !== 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
|
||||
this.#canvas.initialX = e.offsetX;
|
||||
this.#canvas.initialY = e.offsetY;
|
||||
this.#canvas.pointerDown = true;
|
||||
|
||||
this.#renderIcon({visibility: "hidden"});
|
||||
|
||||
this.#canvas.setPointerCapture(e.pointerId);
|
||||
}
|
||||
|
||||
#onCanvasPointerMove(e) {
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
|
||||
if (this.#canvas.pointerDown) {
|
||||
let offsetX;
|
||||
let offsetY;
|
||||
|
||||
if (e.offsetX < 0) {
|
||||
offsetX = 0;
|
||||
}
|
||||
else if (e.offsetX > this.#canvas.width - 1) {
|
||||
offsetX = this.#canvas.width - 1;
|
||||
}
|
||||
else {
|
||||
offsetX = e.offsetX;
|
||||
}
|
||||
|
||||
if (e.offsetY < 0) {
|
||||
offsetY = 0;
|
||||
}
|
||||
else if (e.offsetY > this.#canvas.height - 1) {
|
||||
offsetY = this.#canvas.height - 1;
|
||||
}
|
||||
else {
|
||||
offsetY = e.offsetY;
|
||||
}
|
||||
|
||||
let width = offsetX - this.#canvas.initialX;
|
||||
let height = offsetY - this.#canvas.initialY;
|
||||
|
||||
this.#setBlankCanvas();
|
||||
this.#canvasCtx.beginPath();
|
||||
this.#canvasCtx.clearRect(this.#canvas.initialX, this.#canvas.initialY, width, height);
|
||||
this.#canvasCtx.rect(this.#canvas.initialX, this.#canvas.initialY, width, height);
|
||||
this.#canvasCtx.stroke();
|
||||
this.#canvasCtx.closePath();
|
||||
}
|
||||
}
|
||||
|
||||
async #onCanvasPointerUpAsync(e) {
|
||||
if (e.button !== 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
|
||||
if (this.#canvas.pointerDown) {
|
||||
let offsetX;
|
||||
let offsetY;
|
||||
|
||||
if (e.offsetX < 0) {
|
||||
offsetX = 0;
|
||||
}
|
||||
else if (e.offsetX > this.#canvas.width - 1) {
|
||||
offsetX = this.#canvas.width - 1;
|
||||
}
|
||||
else {
|
||||
offsetX = e.offsetX;
|
||||
}
|
||||
|
||||
if (e.offsetY < 0) {
|
||||
offsetY = 0;
|
||||
}
|
||||
else if (e.offsetY > this.#canvas.height - 1) {
|
||||
offsetY = this.#canvas.height - 1;
|
||||
}
|
||||
else {
|
||||
offsetY = e.offsetY;
|
||||
}
|
||||
|
||||
if (Math.abs(offsetX - this.#canvas.initialX) > 10 && Math.abs(offsetY - this.#canvas.initialY) > 10) {
|
||||
await this.#takeSnapshotAsync(offsetX, offsetY);
|
||||
}
|
||||
|
||||
this.#canvas.initialX = null;
|
||||
this.#canvas.initialY = null;
|
||||
this.#canvas.pointerDown = false;
|
||||
|
||||
this.#canvas.classList.remove("visible");
|
||||
this.#setBlankCanvas();
|
||||
this.#renderForm({visibility: "visible"});
|
||||
}
|
||||
}
|
||||
|
||||
async #takeSnapshotAsync(offsetX, offsetY) {
|
||||
let snapshotCanvas = await html2canvas(document.body, {
|
||||
width: Math.abs(this.#canvas.initialX - offsetX),
|
||||
height: Math.abs(this.#canvas.initialY - offsetY),
|
||||
x: Math.min(this.#canvas.initialX, offsetX),
|
||||
y: Math.min(this.#canvas.initialY, offsetY)
|
||||
})
|
||||
|
||||
let base64image = snapshotCanvas.toDataURL("image/png");
|
||||
|
||||
// var image = new Image();
|
||||
// image.src = base64image;
|
||||
|
||||
// var w = window.open("_blank");
|
||||
// w.document.write(image.outerHTML);
|
||||
}
|
||||
|
||||
#onSubmitButtonClicked(e) {
|
||||
|
||||
}
|
||||
|
@ -709,7 +868,7 @@
|
|||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
|
||||
this.#pointerDown = true;
|
||||
this.#icon.pointerDown = true;
|
||||
|
||||
this.#icon.setPointerCapture(e.pointerId);
|
||||
}
|
||||
|
@ -718,8 +877,8 @@
|
|||
e.preventDefault();
|
||||
e.stopPropagation();
|
||||
|
||||
if (this.#pointerDown) {
|
||||
this.#moving = true;
|
||||
if (this.#icon.pointerDown) {
|
||||
this.#icon.moving = true;
|
||||
this.#icon.style.cursor = "grabbing";
|
||||
this.#snapToCorner(e.clientX, e.clientY);
|
||||
}
|
||||
|
@ -737,19 +896,19 @@
|
|||
e.stopPropagation();
|
||||
|
||||
this.#icon.style.cursor = "pointer";
|
||||
|
||||
if (this.#pointerDown && !this.#moving) {
|
||||
if (this.#form.classList.contains("hidden")) {
|
||||
this.#canvas.classList.remove("visible");
|
||||
|
||||
if (this.#icon.pointerDown && !this.#icon.moving) {
|
||||
if (this.#form.classList.contains("hidden")) {
|
||||
this.#renderIcon({visibility: "hidden"});
|
||||
this.#renderForm({visibility: "visible"});
|
||||
}
|
||||
}
|
||||
else {
|
||||
this.#moving = false;
|
||||
this.#icon.moving = false;
|
||||
}
|
||||
|
||||
this.#pointerDown = false;
|
||||
this.#icon.pointerDown = false;
|
||||
|
||||
this.#icon.releasePointerCapture(e.pointerId);
|
||||
}
|
||||
|
|
|
@ -65,7 +65,12 @@
|
|||
|
||||
<script type="text/javascript">
|
||||
async function Do() {
|
||||
await html2canvas(document.body)
|
||||
await html2canvas(document.body, {
|
||||
width: 100,
|
||||
height: 100,
|
||||
x: 20,
|
||||
y: 20
|
||||
})
|
||||
.then(
|
||||
function (canvas) {
|
||||
document.body.appendChild(canvas);
|
||||
|
|
Loading…
Reference in New Issue
Block a user