在同一位置显示文本和图像 [英] Display Text and Image in same Position

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本文介绍了在同一位置显示文本和图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我们允许用户在用户点击汽车后上传图片....

we are allowing user to upload an image once user click on car....

一旦用户上传图片,我们就会在车顶上显示用户上传的图片。在容器外显示文字编辑....

Once user Upload the image , we are displaying the user uploaded image on top of the car & displaying text "Edit" outside the container....

要求

但我希望将该文字显示在与图片相同的位置....

But I want to display that text in a same position as of the image....

如果车位是 left:1px
我希望文本位置也应该是 left:1px

Codepen: https://codepen.io/kidsdial/pen/vMLzdJ

小提琴: https: //jsfiddle.net/kidsdial1/s1vukmxh/1/

var target;
var imageUrl = "https://i.imgur.com/RzEm1WK.png";

// Json file - it includes car image and its positions

let jsonData = {
    "layers": [{
        "x": 10,
        "height": 412,
        "layers": [
            {
                "x": 20,
                "layers": [{
                        "x": 30,
                        "src": "iEA642D.jpg",
                        "y": 31,
                        "name": "L2b-1"
                    }
                    
                ],
                "y": 21,
                "name": "user_image_1"
            }
        ],
        "y": 11,
        "width": 412,
        "name": "L1"
    }]
};

$(document).ready(function() {

    // ignore below code - it  will upload image onclick car

    $('.container').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);
            }
        }
    });

    // Below code will fetch car image from json file

    function getAllSrc(layers) {
        let arr = [];
        layers.forEach(layer => {
            if (layer.src) {
                arr.push({
                    src: layer.src,
                    x: layer.x,
                    y: layer.y,
                    name: layer.name
                });
            } else if (layer.layers) {
                let newArr = getAllSrc(layer.layers);
                if (newArr.length > 0) {
                    newArr.forEach(({
                        src,
                        x,
                        y,
                        name
                    }) => {
                        arr.push({
                            src,
                            x: (layer.x + x),
                            y: (layer.y + y),
                            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 = [];

        for (let {
                src,
                x,
                y,
                name
            } of arr) {
            $(".container").css('width', width + "px").css('height', height + "px").addClass('temp');
            if (name.indexOf('mask_') !== -1) {
                var imageUrl1 = imageUrl;
            } else {
                var imageUrl1 = '';
            }
            var mask = $(".container").mask({
                imageUrl: imageUrl1,
                maskImageUrl: 'https://i.imgur.com/' + src,
                onMaskImageCreate: function(img) {

				// car positions : 
				
                    img.css({
                        "position": "absolute",
                        "left": x + "px",
                        "top": y + "px"
                    });

                },
                id: counter
            });
            table.push(mask);
            fileup.onchange = function() {

                let mask2 = table[target];
                const newImageLoadedId = mask2.loadImage(URL.createObjectURL(fileup.files[0]));
                document.getElementById('fileup').value = "";

                //  Edit text

    $("<span class=\"pip\">" +
    "<br/><span style =\"left:  layer.x + 'px;'\" class=\"edit\" >Edit </span>" +
    "</span>").insertAfter("#fileup");

                // Edit code end here....
               
            };
            counter++;
        }

    }
    json(jsonData);
}); // end of document ready

// ignore below 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.updateStyle = function() {
            return new Promise((resolve, reject) => {
                context.beginPath();
                context.globalCompositeOperation = "source-over";
                image = new Image();
                image.setAttribute('crossOrigin', 'anonymous');
                image.src = settings.maskImageUrl;
                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 = new Image();
            img.setAttribute('crossOrigin', 'anonymous');
            img.src = settings.imageUrl;
            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");
            //if (img)
            // img.remove();
            // reset the code.
            settings.y = startY;
            settings.x = startX;
            prevX = prevY = 0;
            settings.imageUrl = imageUrl;
            initImage = true;
            container.updateStyle().then(renderInnerImage);
            // sirpepole  Add this
            return settings.id;
        };


        // change the masked Image
        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
        })
        return container;
    };
}(jQuery));

.temp {}

.container {
	background: gold;
  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;
}


.txtContainer{ position:absolute;  text-align:center; color:#FFF}

.txtContainer:hover {
     background: red;
     padding: 1px;
	border-style: dotted;
}

.pip {
  display: inline-block;
  margin: 10px 10px 0 0;
}
.remove {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
}
.remove:hover {
  background: white;
  color: black;
}

.edit {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
  position:relative;
  z-index: 3;
}
.edit:hover {
  background: white;
  color: black;
  position:relative;
  z-index: 3;
}

.white_content {
  display: none;
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  padding: 16px;
  border: 16px solid orange;
  background-color: white;
  z-index: 1002;
  overflow: auto;
}

<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 class="container">

</div>

推荐答案

CSS更改 - **更新 .pip ** CSS 使用以下 CSS

.pip {
  display: inline-block;
  margin: 0;
  position: absolute;
}

脚本更改 - 只需将插入div更改为 .masked-IMG 。计算并应用顶部空格。

Script Changes - Just change insert div to .masked-img. Calculate and apply left, top spaces.

以下代码段中更新了所有提及的更改。试试这个我希望它会帮助你。谢谢

All the mentioned changes updated in a below code snippet. Try this I hope it'll help you out. Thanks

$("<span class=\"pip\">" +
    "<span class=\"edit\" >Edit </span>" +
    "</span>").insertAfter(".masked-img").css({"left": x + "px", "top": y - $('.pip').height() + "px"});

var target;
var imageUrl = "https://i.imgur.com/RzEm1WK.png";

// Json file - it includes car image and its positions

let jsonData = {
    "layers": [{
        "x": 10,
        "height": 412,
        "layers": [
            {
                "x": 20,
                "layers": [{
                        "x": 30,
                        "src": "iEA642D.jpg",
                        "y": 31,
                        "name": "L2b-1"
                    }
                    
                ],
                "y": 21,
                "name": "user_image_1"
            }
        ],
        "y": 11,
        "width": 412,
        "name": "L1"
    }]
};

$(document).ready(function() {

    // ignore below code - it  will upload image onclick car

    $('.container').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);
            }
        }
    });

    // Below code will fetch car image from json file

    function getAllSrc(layers) {
        let arr = [];
        layers.forEach(layer => {
            if (layer.src) {
                arr.push({
                    src: layer.src,
                    x: layer.x,
                    y: layer.y,
                    name: layer.name
                });
            } else if (layer.layers) {
                let newArr = getAllSrc(layer.layers);
                if (newArr.length > 0) {
                    newArr.forEach(({
                        src,
                        x,
                        y,
                        name
                    }) => {
                        arr.push({
                            src,
                            x: (layer.x + x),
                            y: (layer.y + y),
                            name: (name)
                        });
                    });
                }
            }
        });
        return arr;
    }

    function json(data)

    {
        var width = 0;
        var height = 0;
        var leftValue = 0;

        let arr = getAllSrc(data.layers);

        let layer1 = data.layers;
        width = layer1[0].width;
        height = layer1[0].height;
        let counter = 0;
        let table = [];

        for (let {
                src,
                x,
                y,
                name
            } of arr) {
            $(".container").css('width', width + "px").css('height', height + "px").addClass('temp');
            if (name.indexOf('mask_') !== -1) {
                var imageUrl1 = imageUrl;
            } else {
                var imageUrl1 = '';
            }
            var mask = $(".container").mask({
                imageUrl: imageUrl1,
                maskImageUrl: 'https://i.imgur.com/' + src,
                onMaskImageCreate: function(img) {

				// car positions : 
				
                    img.css({
                        "position": "absolute",
                        "left": x + "px",
                        "top": y + "px"
                    });

                },
                id: counter
            });
            table.push(mask);
            fileup.onchange = function() {

                let mask2 = table[target];
                const newImageLoadedId = mask2.loadImage(URL.createObjectURL(fileup.files[0]));
                document.getElementById('fileup').value = "";

                //  Edit text

    $("<span class=\"pip\">" +
    "<span class=\"edit\" >Edit </span>" +
    "</span>").insertAfter(".masked-img").css({"left": x + "px", "top": y - $('.pip').height() + "px"});

                // Edit code end here....
               
            };
            counter++;
        }

    }
    json(jsonData);
}); // end of document ready

// ignore below 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.updateStyle = function() {
            return new Promise((resolve, reject) => {
                context.beginPath();
                context.globalCompositeOperation = "source-over";
                image = new Image();
                image.setAttribute('crossOrigin', 'anonymous');
                image.src = settings.maskImageUrl;
                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 = new Image();
            img.setAttribute('crossOrigin', 'anonymous');
            img.src = settings.imageUrl;
            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");
            //if (img)
            // img.remove();
            // reset the code.
            settings.y = startY;
            settings.x = startX;
            prevX = prevY = 0;
            settings.imageUrl = imageUrl;
            initImage = true;
            container.updateStyle().then(renderInnerImage);
            // sirpepole  Add this
            return settings.id;
        };


        // change the masked Image
        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
        })
        return container;
    };
}(jQuery));

.temp {}

.container {
	background: gold;
  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;
}

.txtContainer{ 
  position:absolute; 
  text-align:center; 
  color:#FFF
}

.txtContainer:hover {
  background: red;
  padding: 1px;
	border-style: dotted;
}

.pip {
  display: inline-block;
  margin: 0;
  position: absolute;
}
.remove {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
}
.remove:hover {
  background: white;
  color: black;
}

.edit {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
  position:relative;
  z-index: 3;
}
.edit:hover {
  background: white;
  color: black;
  position:relative;
  z-index: 3;
}

.white_content {
  display: none;
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  padding: 16px;
  border: 16px solid orange;
  background-color: white;
  z-index: 1002;
  overflow: auto;
}

<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 class="container"></div>

另一种选择如果你有多张图片。

var target;
var imageUrl = "https://i.imgur.com/RzEm1WK.png";

// Json file - it includes car image and its positions

let jsonData = {
  "path" : " newyear collage\/",
  "info" : {
    "author" : "",
    "keywords" : "",
    "file" : "newyear collage",
    "date" : "sRGB",
    "title" : "",
    "description" : "Normal",
    "generator" : "Export Kit v1.2.8"
  },
  "name" : "newyear collage",
  "layers" : [
    {
      "x" : 0,
      "height" : 612,
      "layers" : [
        {
          "x" : 0,
          "color" : "0xFFFFFF",
          "height" : 612,
          "y" : 0,
          "width" : 612,
          "shapeType" : "rectangle",
          "type" : "shape",
          "name" : "bg_rectangle"
        },
        {
          "x" : 160,
          "height" : 296,
          "layers" : [
            {
              "x" : 0,
              "height" : 296,
              "src" : "iEA642D.jpg",
              "y" : 0,
              "width" : 429,
              "type" : "image",
              "name" : "mask_image_1"
            },
            {
              "radius" : "26 \/ 27",
              "color" : "0xACACAC",
              "x" : 188,
              "y" : 122,
              "height" : 53,
              "width" : 53,
              "shapeType" : "ellipse",
              "type" : "shape",
              "name" : "useradd_ellipse1"
            }
          ],
          "y" : 291,
          "width" : 429,
          "type" : "group",
          "name" : "user_image_1"
        },
        {
          "x" : 25,
          "height" : 324,
          "layers" : [
            {
              "x" : 0,
              "height" : 324,
              "src" : "iEA642D.jpg",
              "y" : 0,
              "width" : 471,
              "type" : "image",
              "name" : "mask_image_2"
            },
            {
              "radius" : "26 \/ 27",
              "color" : "0xACACAC",
              "x" : 209,
              "y" : 136,
              "height" : 53,
              "width" : 53,
              "shapeType" : "ellipse",
              "type" : "shape",
              "name" : "useradd_ellipse_2"
            }
          ],
          "y" : 22,
          "width" : 471,
          "type" : "group",
          "name" : "user_image_2"
        }
      ],
      "y" : 0,
      "width" : 612,
      "type" : "group",
      "name" : "newyearcollage08"
    }
  ]
};

$(document).ready(function() {

    // ignore below code - it  will upload image onclick car

    $('.container').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);
            }
        }
    });

    // Below code will fetch car image from json file

    function getAllSrc(layers) {
        let arr = [];
        layers.forEach(layer => {
            if (layer.src) {
                arr.push({
                    src: layer.src,
                    x: layer.x,
                    y: layer.y,
                    name: layer.name
                });
            } else if (layer.layers) {
                let newArr = getAllSrc(layer.layers);
                if (newArr.length > 0) {
                    newArr.forEach(({
                        src,
                        x,
                        y,
                        name
                    }) => {
                        arr.push({
                            src,
                            x: (layer.x + x),
                            y: (layer.y + y),
                            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 = [];

        for (let {
                src,
                x,
                y,
                name
            } of arr) {
            $(".container").css('width', width + "px").css('height', height + "px").addClass('temp');
            var imagePosition = arr;
            if (name.indexOf('mask_') !== -1) {
                var imageUrl1 = imageUrl;
            } else {
                var imageUrl1 = '';
            }
            var mask = $(".container").mask({
                imageUrl: imageUrl1,
                maskImageUrl: 'https://i.imgur.com/' + src,
                onMaskImageCreate: function(img) {

				// car positions : 
				
                    img.css({
                        "position": "absolute",
                        "left": x + "px",
                        "top": y + "px"
                    });

                },
                id: counter
            });
            table.push(mask);
            fileup.onchange = function() {

                let mask2 = table[target];
                const newImageLoadedId = mask2.loadImage(URL.createObjectURL(fileup.files[0]));
                document.getElementById('fileup').value = "";

                //  Edit text 

              if($(".masked-img" + newImageLoadedId).length === 1) {
    $("<span class=\"pip\">" + 
    "<span class=\"edit\" >Edit </span>" +
    "</span>").insertAfter(".masked-img" + newImageLoadedId).css({"left": imagePosition[newImageLoadedId].x + "px", "top": imagePosition[newImageLoadedId].y - $('.pip').height() + "px"});
                // Edit code end here....
              }         
            };
            counter++;
        }

    }
    json(jsonData);
}); // end of document ready

// ignore below 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
            });
            if(!div.hasClass('masked-img0') && !div.hasClass('masked-img1')) {
               div.addClass('masked-img1');
            }
        }

        container.disable = function() {
            draggable = false;
            $(canvas).attr("active", "false");
            div.css({
                "z-index": 1
            });
            if(!div.hasClass('masked-img0') && !div.hasClass('masked-img1')) {
               div.addClass('masked-img0');
            }
        }

        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;
                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 = new Image();
            img.setAttribute('crossOrigin', 'anonymous');
            img.src = settings.imageUrl;
            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");
            //if (img)
            // img.remove();
            // reset the code.
            settings.y = startY;
            settings.x = startX;
            prevX = prevY = 0;
            settings.imageUrl = imageUrl;
            initImage = true;
            container.updateStyle().then(renderInnerImage);
            // sirpepole  Add this
            return settings.id;
        };


        // change the masked Image
        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
        })
        return container;
    };
}(jQuery));

.temp {}

.container {
	background: gold;
  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;
}

.txtContainer{ 
  position:absolute; 
  text-align:center; 
  color:#FFF
}

.txtContainer:hover {
  background: red;
  padding: 1px;
	border-style: dotted;
}

.pip {
  display: inline-block;
  margin: 0;
  position: absolute;
}
.remove {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
}
.remove:hover {
  background: white;
  color: black;
}

.edit {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
  position:relative;
  z-index: 3;
}
.edit:hover {
  background: white;
  color: black;
  position:relative;
  z-index: 3;
}

.white_content {
  display: none;
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  padding: 16px;
  border: 16px solid orange;
  background-color: white;
  z-index: 1002;
  overflow: auto;
}

<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 class="container"></div>

这篇关于在同一位置显示文本和图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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