I am new using cropperjs library. But I'm struggling on how can I configure it.
What I have
https://jsfiddle.net/kaeqxfjL/
What I need
I want to integrate a full image crop where you just need to drag the photo inside the canvas instead of having a square to crop the photo. I also need to make the width of the photo fit to the width of the canvas so you cannot drag it left/right; you could only drag it up/down.
var canvas = $("#canvas"),
context = canvas.get(0).getContext("2d"),
$result = $('#result');
$('#fileInput').on( 'change', function(){
if (this.files && this.files[0]) {
if ( this.files[0].type.match(/^image\//) ) {
var reader = new FileReader();
reader.onload = function(evt) {
var img = new Image();
img.onload = function() {
context.canvas.height = img.height;
context.canvas.width = img.width;
context.drawImage(img, 0, 0);
var cropper = canvas.cropper({
aspectRatio: 16 / 9,
dragMode: 'move'
});
$('#btnCrop').click(function() {
// Get a string base 64 data url
var croppedImageDataURL = canvas.cropper('getCroppedCanvas').toDataURL("image/png");
$result.append( $('<img>').attr('src', croppedImageDataURL) );
});
$('#btnRestore').click(function() {
canvas.cropper('reset');
$result.empty();
});
};
img.src = evt.target.result;
};
reader.readAsDataURL(this.files[0]);
}
else {
alert("Invalid file type! Please select an image file.");
}
}
else {
alert('No file(s) selected.');
}
});
/* Limit image width to avoid overflow the container */
img {
max-width: 100%; /* This rule is very important, please do not ignore this! */
}
#canvas {
height: 290px;
width: 650px;
background-color: #ffffff;
cursor: default;
border: 1px solid black;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/cropper/2.3.3/cropper.css" rel="stylesheet"/>
<p>
<!-- Below are a series of inputs which allow file selection and interaction with the cropper api -->
<input type="file" id="fileInput" accept="image/*" />
<input type="button" id="btnCrop" value="Crop" />
<input type="button" id="btnRestore" value="Restore" />
</p>
<div>
<canvas id="canvas">
Your browser does not support the HTML5 canvas element.
</canvas>
</div>
<div id="result"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/cropper/2.3.3/cropper.js"></script>
Set image width using class:
And set
viewMode
andaspectRatio
as below.