Once we click on Image , we are displaying File upload dialog box. User can able to upload image.
Issue :
Then when we click on "Remove" button, its clearing whole canvas.
Requirement :
but i need to delete only the uploaded image....
Remove Image Code :
$("<br/><span id=\"" + newImageLoadedId + "\" class=\"remove\">Remove</span>").insertAfter(".masked-img" + newImageLoadedId).css({
"left": ImagePosition[newImageLoadedId].x + (ImagePosition[newImageLoadedId].width / 2) + "px",
"top": ImagePosition[newImageLoadedId].y + (ImagePosition[newImageLoadedId].height / 2 + 25) + "px"
});
$(".remove").click(function(event) {
const canvasId = "canvas#" + event.currentTarget.id;
// Delete the uploaded image & icon
const ctx = $("canvas")[event.currentTarget.id].getContext("2d");
ctx.fillStyle = "white"
ctx.fillRect(0, 0, 500, 500)
$('#container').data('image_set' + event.currentTarget.id, false)
// Delete the Remove button
$(this).remove();
});
Below is Code Snippet :
var target;
const imageUrl = "";
let jsonData = {
"layers": [{
"x": 0,
"height": 612,
"layers": [{
"x": 10,
"src": "bW5RSFA.png",
"y": 10,
"height": 296,
"width": 429,
"name": "mask_1"
}],
"y": 0,
"width": 612
}]
};
const containerElement = $('#container');
const fileUp = $('#fileup');
let mask;
$(function() {
// Upload image onclick mask image
containerElement.click(function(e) {
var res = e.target;
target = res.id;
if (e.target.getContext) {
// click only inside Non Transparent part
var pixel = e.target.getContext('2d').getImageData(e.offsetX, e.offsetY, 1, 1).data;
if (pixel[3] === 255) {
setTimeout(() => {
$('#fileup').click();
}, 20);
}
}
});
// Fetch mask images from json file - IGNORE this code
function getAllSrc(layers) {
let arr = [];
layers.forEach(layer => {
if (layer.src) {
arr.push({
src: layer.src,
x: layer.x,
y: layer.y,
height: layer.height,
width: layer.width,
name: layer.name
});
} else if (layer.layers) {
let newArr = getAllSrc(layer.layers);
if (newArr.length > 0) {
newArr.forEach(({
src,
x,
y,
height,
width,
name
}) => {
arr.push({
src,
x: (layer.x + x),
y: (layer.y + y),
height,
width,
name: (name)
});
});
}
}
});
return arr;
}
function json(data) {
var width = 0;
var height = 0;
let arr = getAllSrc(data.layers);
let layer1 = data.layers;
width = layer1[0].width;
height = layer1[0].height;
let counter = 0;
let table = [];
// container dimensions
containerElement.css('width', width + "px").css('height', height + "px").addClass('temp');
//end
for (let {
src,
x,
y,
name
} of arr) {
//Get Height and width of mask image [ edit button ]
var ImagePosition = arr;
//code end
var imageUrl1 = imageUrl;
var mask = $(".container").mask({
imageUrl: name.indexOf('mask_') !== -1 ? imageUrl1 : undefined,
// Fetch Mask images
maskImageUrl: 'http://i.imgur.com/' + src,
// end
onMaskImageCreate: function(img) {
// Mask image positions
img.css({
"position": "absolute",
"left": x + "px",
"top": y + "px"
});
// end
},
id: counter
});
// here
ImagePosition.map(function(cur, index) {
var available = cur.name.includes('mask_');
if (!available) {
$('.masked-img' + index).css('pointer-events', 'none');
}
});
table.push(mask);
fileup.onchange = function() {
let mask2 = table[target];
const newImageLoadedId = mask2.loadImage(URL.createObjectURL(fileup.files[0]));
document.getElementById('fileup').value = "";
// Remove image
$("<br/><span id=\"" + newImageLoadedId + "\" class=\"remove\">Remove</span>").insertAfter(".masked-img" + newImageLoadedId).css({
"left": ImagePosition[newImageLoadedId].x + (ImagePosition[newImageLoadedId].width / 2) + "px",
"top": ImagePosition[newImageLoadedId].y + (ImagePosition[newImageLoadedId].height / 2 + 25) + "px"
});
$(".remove").click(function(event) {
const canvasId = "canvas#" + event.currentTarget.id;
// Delete the uploaded image & icon
const ctx = $("canvas")[event.currentTarget.id].getContext("2d");
ctx.fillStyle = "white"
ctx.fillRect(0, 0, 500, 500)
$('#container').data('image_set' + event.currentTarget.id, false)
// Delete the Remove button
$(this).remove();
});
// Remove image code end here....
};
counter++;
}
return mask;
}
mask = json(jsonData);
}); // end of function
// Image code
(function($) {
window.JQmasks = [];
$.fn.mask = function(options) {
// This is the easiest way to have default options.
var settings = $.extend({
// These are the defaults.
maskImageUrl: undefined,
imageUrl: undefined,
scale: 1,
id: new Date().getUTCMilliseconds().toString(),
x: 0, // image start position
y: 0, // image start position
onMaskImageCreate: function(div) {},
}, options);
// Create the image properties
settings.maskImage = new Image
settings.image = new Image
// set the cross-origin attributes
settings.maskImage.setAttribute('crossOrigin', 'anonymous');
settings.image.setAttribute('crossOrigin', 'anonymous');
settings.maskImage.onload = function() {
// once the mask is loaded, load the image
container.loadImage(settings.imageUrl)
container.drawMask()
}
settings.image.onload = function() {
// once the image is loaded, render to canvas
container.drawImage()
}
var container = $(this);
let prevX = 0,
prevY = 0,
draggable = false,
img,
canvas,
context,
image,
timeout,
initImage = false,
startX = settings.x,
startY = settings.y,
div;
container.mousePosition = function(event) {
return {
x: event.pageX || event.offsetX,
y: event.pageY || event.offsetY
};
}
container.selected = function(ev) {
var pos = container.mousePosition(ev);
var item = $(".masked-img canvas").filter(function() {
var offset = $(this).offset()
var x = pos.x - offset.left;
var y = pos.y - offset.top;
var d = this.getContext('2d').getImageData(x, y, 1, 1).data;
return d[0] > 0
});
JQmasks.forEach(function(el) {
var id = item.length > 0 ? $(item).attr("id") : "";
if (el.id == id)
el.item.enable();
else el.item.disable();
});
};
container.enable = function() {
draggable = true;
$(canvas).attr("active", "true");
div.css({
"z-index": 2
});
}
container.disable = function() {
draggable = false;
$(canvas).attr("active", "false");
div.css({
"z-index": 1
});
}
container.drawMask = function() {
if (!settings.maskImage) return true;
canvas.width = settings.maskImage.width;
canvas.height = settings.maskImage.height;
context.save();
context.beginPath();
context.globalCompositeOperation = "source-over";
// draw the masked image after scaling
if (settings.maskImage) context.drawImage(settings.maskImage, 0, 0, settings.maskImage.width, settings.maskImage.height);
context.restore()
};
container.drawImage = function() {
const img = settings.image
settings.x = settings.x == 0 && initImage ? (canvas.width - (img.width * settings.scale)) / 2 : settings.x;
settings.y = settings.y == 0 && initImage ? (canvas.height - (img.height * settings.scale)) / 2 : settings.y;
context.globalCompositeOperation = 'source-atop';
context.save();
context.translate(settings.x + img.width / 2, settings.y + img.height / 2);
context.rotate(settings.rotate);
context.scale(settings.scale, settings.scale);
context.translate(-(settings.x + img.width / 2), -(settings.y + img.height / 2));
let width = img.width,
height = img.height;
if (img)
context.drawImage(img, settings.x, settings.y, width, height);
context.restore();
initImage = false;
}
container.loadImage = function(imageUrl) {
if (!imageUrl) return true;
settings.y = startY;
settings.x = startX;
prevX = prevY = 0;
initImage = true;
settings.image.src = imageUrl; // CHANGED
// sirpepole Add this
return settings.id;
};
container.loadMaskImage = function(imageUrl, from) {
canvas = document.createElement("canvas");
context = canvas.getContext('2d');
canvas.setAttribute("draggable", "true");
canvas.setAttribute("id", settings.id);
// settings.maskImageUrl = imageUrl;
settings.maskImage.src = imageUrl // CHANGED
div = $("<div/>", {
"class": "masked-img"
}).append(canvas);
// div.find("canvas").on('touchstart mousedown', function(event)
div.find("canvas").on('dragstart', function(event) {
if (event.handled === false) return;
event.handled = true;
container.onDragStart(event);
});
div.find("canvas").on('touchend mouseup', function(event) {
if (event.handled === false) return;
event.handled = true;
container.selected(event);
});
div.find("canvas").bind("dragover", container.onDragOver);
container.append(div);
if (settings.onMaskImageCreate)
settings.onMaskImageCreate(div);
// container.loadImage(settings.imageUrl);
// Moved this to the settings.maskImage.onload
};
if (settings.maskImageUrl) {
container.loadMaskImage(settings.maskImageUrl);
}
JQmasks.push({
item: container,
id: settings.id
})
// Edit image
div.addClass('masked-img' + settings.id);
div.attr('data-id', settings.id);
// ends
return container;
};
}(jQuery));.container {
background: silver;
position: relative;
}
.container img {
position: absolute;
top: 0;
bottom: 250px;
left: 0;
right: 0;
margin: auto;
z-index: 999;
}
.masked-img {
overflow: hidden;
position: relative;
}
.pip {
display: inline-block;
margin: 0;
position: absolute;
}
.remove {
background: #444;
border: 1px solid black;
color: white;
text-align: center;
cursor: pointer;
position: absolute;
z-index: 3;
}
.remove:hover {
background: white;
color: black;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<input id="fileup" name="fileup" type="file" style="display:none">
<div id="container" class="container">
</div>
