用户单击“蒙版”并上传图像。...
它两次显示同一张图片,并且编辑文本也在图像上显示。...
一旦用户点击“编辑文本”,我们就会显示弹出框。...
我们可以看到正在显示 Zoomin 和 Zoomout 按钮。...
问题:
点击这些按钮后,其会放大外部图像,而不是内部图像。...
要求:
所以我想用外部图像替换内部图像并删除内部图像,以便缩放功能适用于上传的图像。...
codepen:https://codepen.io/kidsdial/pen/OGGyYd
var parameters: [String: Any]? {
var params: [String: Any] = [:]
switch self {
case .submit(let services, let comments):
////////////////////////////////////////////////////////////////////////////////////
params["FEEDBACK_SERVICES"] = services.toDictionaryArray() // Here it comes as nil!
////////////////////////////////////////////////////////////////////////////////////
params["COMMENTS"] = comments
return params
}
}
var target;
const imageUrl = "https://i.imgur.com/RzEm1WK.png";
let jsonData = {
"layers": [{
"x": 0,
"height": 612,
"layers": [{
"x": 160,
"src": "ax0HVTs.png",
"y": 291,
"height": 296,
"width": 429,
"name": "mask_1"
},
{
"x": 25,
"src": "hEM2kEP.png",
"height": 324,
"width": 471,
"y": 22,
"name": "mask_2"
}
],
"y": 0,
"width": 612
}]
};
const containerElement = $('#container');
const fileUp = $('#fileup');
$(function() {
// Upload image onclick mask image
containerElement.click(function(e) {
var res = e.target;
target = res.id;
// console.log(target);
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 mask = $(".container").mask({
imageUrl: imageUrl,
// Fetch Mask images
maskImageUrl: 'https://i.imgur.com/' + src,
// end
onMaskImageCreate: function(img) {
// Mask image positions
img.css({
"position": "absolute",
"left": x + "px",
"top": y + "px"
});
// end
},
id: counter
});
table.push(mask);
fileup.onchange = function() {
let mask2 = table[target];
const imgView = URL.createObjectURL(fileup.files[0]);
const newImageLoadedId = mask2.loadImage(URL.createObjectURL(fileup.files[0]));
document.getElementById('fileup').value = "";
if (($(".masked-img" + newImageLoadedId + ' #renderImage').length) === 0) {
$('.masked-img' + newImageLoadedId).append("<img id='renderImage' style='width: 300px' src=" + imgView + ">");
} else {
$('#renderImage').attr('src', imgView);
}
// Edit image - IGNORE this code
if ($(".masked-img" + newImageLoadedId).length === 1) {
$("<span class=\"pip pip" + newImageLoadedId + "\">" +
"<a onclick='document.getElementById(\"dark" + newImageLoadedId + "\").style.display=\"block\";'><span class=\"edit edit" + newImageLoadedId + "\" >Edit </span></a>" +
"</span>").insertAfter(".masked-img" + newImageLoadedId).css({
"left": ImagePosition[newImageLoadedId].x + (ImagePosition[newImageLoadedId].width / 2) + "px",
"top": ImagePosition[newImageLoadedId].y + (ImagePosition[newImageLoadedId].height / 2) + "px"
});;
$("<div id=\'dark" + newImageLoadedId + "\' class=\'dark_content\'>" +
$('#demoTemplate').html() +
"<a href=\"javascript:void(0)\" onclick=\"document.getElementById(\'dark" + newImageLoadedId + "\').style.display=\'none\'\">Close</a>" + "</div>").appendTo(".pip" + newImageLoadedId).css({
"left": $('.edit' + newImageLoadedId).width() + 2 + "px",
"top": "0px"
});
}
// end
};
counter++;
}
}
json(jsonData);
}); // end of function
// Image code
(function($) {
var 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);
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.getImagePosition = function() {
return {
x: settings.x,
y: settings.y,
scale: settings.scale
};
};
container.updateStyle = function() {
return new Promise((resolve, reject) => {
context.beginPath();
context.globalCompositeOperation = "source-over";
image = new Image();
image.setAttribute('crossOrigin', 'anonymous');
image.src = settings.maskImageUrl;
// console.log(image.src);
image.onload = function() {
canvas.width = image.width;
canvas.height = image.height;
context.drawImage(image, 0, 0, image.width, image.height);
div.css({
"width": image.width,
"height": image.height
});
resolve();
};
});
};
function renderInnerImage() {
// img = $('#renderImage'); // new Image()
img = new Image();
img.setAttribute('crossOrigin', 'anonymous');
img.src = settings.imageUrl;
// console.log(image.src);
img.onload = function() {
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.drawImage(img, settings.x, settings.y, img.width * settings.scale, img.height * settings.scale);
initImage = false;
};
}
// change the draggable image
container.loadImage = function(imageUrl) {
console.log("load");
settings.y = startY;
settings.x = startX;
// console.log(settings.y);
// console.log(settings.x);
prevX = prevY = 0;
settings.imageUrl = imageUrl;
// console.log(settings.imageUrl);
initImage = true;
container.updateStyle().then(renderInnerImage);
// 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;
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);
};
container.loadMaskImage(settings.maskImageUrl);
JQmasks.push({
item: container,
id: settings.id
});
// Edit image
div.addClass('masked-img' + settings.id);
// end
return container;
};
}(jQuery));
// zoom
var angle = 0;
var scale = 1;
function zoom_in(data) {
var getParent = data.parentElement.parentElement.parentElement;
var getId = getParent.id.substring(getParent.id.length - 1);
console.log(getId);
scale += .25;
$('.masked-img' + getId + ' #renderImage').css({
transform: 'scale('+ scale +')'
});
}
function zoom_out(data) {
var getParent = data.parentElement.parentElement.parentElement;
var getId = getParent.id.substring(getParent.id.length - 1);
console.log(getId);
scale -= .25;
$('.masked-img' + getId + ' #renderImage').css({
transform: 'scale('+ scale +')'
});
}
.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;
}
.edit {
display: block;
background: #444;
border: 1px solid black;
color: white;
text-align: center;
cursor: pointer;
position: absolute;
z-index: 3;
}
.edit:hover {
background: white;
color: black;
position: absolute;
z-index: 3;
}
.dark_content {
display: none;
position: relative;
top: 25%;
left: 25%;
width: 250px;
height: 250px;
padding: 16px;
border: 16px solid orange;
background-color: white;
z-index: 1002;
overflow: auto;
}
答案 0 :(得分:4)
您可以将整个画布代码替换为CSS,这样就可以将transform: scale(2)
与遮罩内的图像一起使用:
var img = document.querySelector('img');
var zoom = 1;
document.querySelector('#zoom_in').addEventListener('click', function(e) {
zoom += 0.2;
img.style.transform = 'scale(' + zoom +')';
});
document.querySelector('#zoom_out').addEventListener('click', function(e) {
zoom -= 0.2;
img.style.transform = 'scale(' + zoom +')';
});
.clip {
-webkit-mask-image: url(https://i.imgur.com/ax0HVTs.png);
-webkit-mask-repeat: no-repeat;
mask-image: url(https://i.imgur.com/ax0HVTs.png);
mask-repeat: no-repeat;
mask: url(https://i.imgur.com/ax0HVTs.png);
}
<div class="clip">
<img src="http://placekitten.com/500/300"/>
</div>
<button id="zoom_in">+</button>
<button id="zoom_out">-</button>
仅在Chrome中进行了测试,如果您想要更多的浏览器支持,则可能需要研究什么是前缀以及跨浏览器代码的外观(如果可以找到它,可以询问有关“跨浏览器CSS掩码”的问题)已过时Cross-browser clipping masks,并且没有好的答案)。
本文显示了有关剪切路径和蒙版的更多信息 https://css-tricks.com/clipping-masking-css/
该解决方案并非在所有浏览器中都适用(此处支持https://caniuse.com/#feat=css-masks),但可能有一定用处。
如果您想使用画布使其更复杂并且我认为这不是问的正确位置,则可以雇用某人来更新遮罩插件以为您添加对缩放的支持(因为它需要要在zoom插件中完成,也许像在画布上缩放图像然后再应用蒙版,对不起,没有检查蒙版插件的工作原理。
编辑:这应该为目录中的文件创建css文件:
const {promisify} = require('util');
const fs = require('fs');
const readFileAsync = promisify(fs.readFile);
const statAsync = promisify(fs.stat);
const writeFileAsync = promisify(fs.writeFile);
readFileAsync('./masks').then(async (data) =>
var css = [];
for (let file of data) {
const stat = await statAsync(file);
if (stat.isFile()) {
css.push(`.mask_${i} {
-webkit-mask-image: url(${file});
-webkit-mask-repeat: no-repeat;
mask-image: url(${file});
mask-repeat: no-repeat;
mask: url(${file});
}`);
}
}
await writeFileAsync('masks.css', css.join('\n'));
console.log(`css file written ${css.length} rules`);
});