Dropzone。js调整图像大小以适应缩略图大小

I'm trying to resize the image in the thumbnail to fix the box size. I've tried this :

我试着调整缩略图中的图像大小来固定盒子大小。我已经试过这个:

Dropzone.options.myAwesomeDropzone = {
            maxFiles: 20,
            maxFilesize: 2,
            maxThumbnailFilesize: 20,
            acceptedFiles: 'image/*,.jpg,.png,.jpeg',
            thumbnailWidth:"250",
            thumbnailHeight:"250",
            init: function() {
                var dropzone = this, xhrs = [];
                $.each(uploadedImages, function (index, path) {
                    var xhr = new XMLHttpRequest();
                    xhr.open('GET', path);
                    xhr.responseType = 'blob';//force the HTTP response, response-type header to be blob
                    xhr.onload = function() {
                        var file = new File([xhr.response], '', {'type': xhr.response.type});
                        //dropzone.addUploadedFile(file);
                        dropzone.emit("addedfile", file);
                        dropzone.emit("thumbnail", file, path);
                        dropzone.emit("complete", file);
                    };
                    xhrs.push(xhr);
                    xhr.send();
                });
                this.options.maxFiles = this.options.maxFiles - uploadedImages.count;
            }
        };

This is the original Image how it looks : http://files.parsetfss.com/12917a88-ac80-4e5e-a009-fc634161b79c/tfss-6c59b59f-8f57-4610-966e-31bbc203707b-samsung-galaxy-note-4-7290-002.jpg

这是最初的图片:http://files.parsetfss.com/12917a88-ac80-4e5e-a009-fc634161b79c/tfss- 6c59f -8f57-4610-966e-31bbc203707b-samsung-galaxy-note-4-7290-002.jpg。

And this is how it's displayed : Dropzone。js调整图像大小以适应缩略图大小

它是这样显示的:

Also I've tried :

我也试过:

thumbnailWidth:"300",
thumbnailHeight:"300",
===
thumbnailWidth:"400",
thumbnailHeight:"400",

But nothing changed, thumbnailWidth and thumbnailHeight have no effect

但是没有改变，拇指宽度和拇指高度没有影响

2 个解决方案

#1

You can size a new image explicitly in javascript.

您可以在javascript中显式地调整一个新图像的大小。

var img = new Image();
img.src =  'http://files.parsetfss.com/12917a88-ac80-4e5e-a009-fc634161b79c/tfss-6c59b59f-8f57-4610-966e-31bbc203707b-samsung-galaxy-note-4-7290-002.jpg';
img.height = 300;
img.width = 300;

img is now resized with proper dimensions.

img现在以合适的尺寸调整大小。

Also, I just looked at the dropzone.js documentation and this method is probably of use. http://www.dropzonejs.com/#config-resize

另外，我只看了dropzone。js文档和这个方法可能是有用的。http://www.dropzonejs.com/ config-resize

#2

I had the same problem, but if you call manually the resize function of the dropzone, the thumnails will be in the right dimensions:

我也有同样的问题，但是如果你手动调用dropzone的resize函数，它会在正确的维度上:

var file = new File([xhr.response], '', {'type': xhr.response.type});
dropzone.createThumbnailFromUrl(file,path);
dropzone.emit("addedfile", file);
dropzone.emit("thumbnail", file, path);
dropzone.emit("complete", file);

#1