Vuejs multiple image upload with preview component

In this Post We Will Explain About is Vuejs multiple image upload with preview component With Example and Demo.Welcome on infinityknow.com – Examples, The best For Learn web development Tutorials,Demo with Example! Hi Dear Friends here u can know to Vuejs multiple image upload with previewExample

In this post we will show you Best way to implement VueJS + HTML5 Canvas: Image upload component, hear for Image Upload in Your Vue.js Apps With vue-picture-inputwith Download .we will give you demo,Source Code and examples for implement Step By Step Good Luck!.

HTML PART

[php]

[/php]

JavaScript Part

[php]
var shareliveData = {
liveImgDt: ”,
updateImageData: function(newData){
this.liveImgDt = newData;
}
};

Vue.component(‘image-uploader’, {
template: ‘#image-uploader-template’,
props: [‘id’,’width’,’height’],
data: function () {
return {
simpleImgupload: false,
hoverIsDraggable: false,
currtx: null, canvas: null,
img: null,
scaleSteps: 0,
liveimgX: 0, liveimgY: 0,
scaledImageWidth: 0, simpleImgHeight: 0,
imageWidth: 0, imageHeight: 0, imageRight: 0, bottomimg: 0,
draggingImage: false,
startX: 0, startY: 0,
mouseX: 0, mouseY: 0,
shareliveData: window.shareliveData
}
},
computed: {
containerStyles: function () {
return {
width: this.width,
height: this.height
};
}
},
mounted: function(){
this.$on(‘get-image-base64’, function(){
console.log(“ON’ING”);
this.updateTemplateImage();
});
this.canvas = this.$refs.canvas;
this.currtx = this.canvas.getContext(“2d”);
this.img = document.createElement(“img”);
},
methods: {
con64base: function()
{
var liveImgDt = this.canvas.toDataURL(“image/png”);
liveImgDt.replace(‘data:image/png;base64,’, ”);
this.shareliveData.updateImageData(liveImgDt);
},
draw: function(withBorders)
{
this.currtx.clearRect(0, 0, this.canvas.width, this.canvas.height);
var scaleFactor = 1 – (this.scaleSteps * .1) ;
this.scaledImageWidth = this.img.width * scaleFactor;
this.simpleImgHeight = this.scaledImageWidth * (this.img.height/this.img.width);
this.currtx.drawImage(this.img, 0, 0, this.img.width, this.img.height, this.liveimgX, this.liveimgY, this.scaledImageWidth, this.simpleImgHeight);

this.imageRight = this.liveimgX + this.scaledImageWidth;
this.bottomimg = this.liveimgY + this.simpleImgHeight;
if (withBorders) {
this.currtx.beginPath();
this.currtx.moveTo(this.liveimgX, this.liveimgY);
this.currtx.lineTo(this.imageRight, this.liveimgY);
this.currtx.lineTo(this.imageRight, this.bottomimg);
this.currtx.lineTo(this.liveimgX, this.bottomimg);
this.currtx.closePath();
this.currtx.stroke();
}
},
clearmethods: function(){
// clear the canvas
this.currtx.clearRect(0, 0, this.canvas.width, this.canvas.height);
// Reset state
this.$refs.form.reset();
this.simpleImgupload = false;
},
upmethods: function(){
this.scaleSteps–;
this.draw(false);
},
downup: function(){
this.scaleSteps++;
this.draw(false);
},
getMousePos: function(evt){
var rect = this.canvas.getBoundingClientRect(), // abs. size of element
scaleX = this.canvas.width / rect.width, // relationship bitmap vs. element for X
scaleY = this.canvas.height / rect.height; // relationship bitmap vs. element for Y

return {
x: (evt.clientX – rect.left) * scaleX, // scale mouse coordinates after they have
y: (evt.clientY – rect.top) * scaleY // been adjusted to be relative to element
}
},
isImageHit: function(x, y){
return (x > this.liveimgX && x < this.liveimgX + this.imageWidth && y > this.liveimgY && y < this.liveimgY + this.imageHeight); }, triggerInput: function(event) { event.preventDefault(); this.$refs.fileInput.click(); }, simplelivethumb: function (event) { var vueminit = this; var input = event.target; if (input.files && input.files[0]) { var imgread = new FileReader(); imgread.onload = function (e) { vueminit.img.src = e.target.result; } imgread.readAsDataURL(input.files[0]); vueminit.img.onload = function() { vueminit.currtx.drawImage(vueminit.img, 0, 0); vueminit.imageWidth = vueminit.img.width; vueminit.imageHeight = vueminit.img.height; vueminit.imageRight = vueminit.liveimgX + vueminit.imageWidth; vueminit.bottomimg = vueminit.liveimgY + vueminit.imageHeight vueminit.draw(false); vueminit.simpleImgupload = true; } } function handleMouseDown(e) { var pos = vueminit.getMousePos(e); vueminit.startX = pos.x; vueminit.startY = pos.y; vueminit.draggingImage = vueminit.hoverIsDraggable; } function handleMouseUp(e) { vueminit.draggingImage = false; vueminit.draw(false); } function handleMouseOut(e) { handleMouseUp(e); } function handleMouseMove(e) { var pos = vueminit.getMousePos(e); vueminit.hoverIsDraggable = vueminit.isImageHit(pos.x, pos.y); if (vueminit.draggingImage) { vueminit.mouseX = pos.x; vueminit.mouseY = pos.y; var dx = vueminit.mouseX - vueminit.startX; var dy = vueminit.mouseY - vueminit.startY; var collidedOnLeft = vueminit.liveimgX > 0 && dx > 0;
var collidedOnRight = vueminit.imageRight < vueminit.canvas.width && dx < 0; var collidedOnTop = vueminit.liveimgY > 0 && dy > 0;
var collidedOnBottom = vueminit.bottomimg < vueminit.canvas.height && dy < 0; if(collidedOnLeft) { vueminit.liveimgX = 0; vueminit.imageRight = vueminit.scaledImageWidth; } else if(collidedOnRight) { vueminit.liveimgX = vueminit.canvas.width - vueminit.scaledImageWidth; vueminit.imageRight = vueminit.canvas.width; } else { vueminit.liveimgX += dx; vueminit.imageRight += dx; } if(collidedOnTop) { vueminit.liveimgY = 0; vueminit.bottomimg = vueminit.simpleImgHeight; } else if(collidedOnBottom) { vueminit.liveimgY = vueminit.canvas.height - vueminit.simpleImgHeight; vueminit.bottomimg = vueminit.canvas.height; } else { vueminit.liveimgY += dy; vueminit.bottomimg += dy; } vueminit.startX = vueminit.mouseX; vueminit.startY = vueminit.mouseY; vueminit.draw(true); } } vueminit.canvas.addEventListener('mousedown', handleMouseDown, false); vueminit.canvas.addEventListener('mousemove', handleMouseMove, false); vueminit.canvas.addEventListener('mouseup', handleMouseUp, false); vueminit.canvas.addEventListener('mouseout', handleMouseOut, false); } } }); var liveApp = new Vue({ el: '#liveApp', data: { shareliveData: window.shareliveData }, methods: {} }); [/php] Example

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