This commit is contained in:
2025-03-21 09:38:06 +08:00
parent 8e35b74d86
commit f654e16c18
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<template>
<view class="tui-container" @touchmove.stop.prevent="stop">
<view
class="tui-image-cropper"
:change:prop="parse.propsChange"
:prop="props"
:data-lockRatio="lockRatio"
:data-lockWidth="lockWidth"
:data-lockHeight="lockHeight"
:data-maxWidth="maxWidth"
:data-minWidth="minWidth"
:data-maxHeight="maxHeight"
:data-minHeight="minHeight"
:data-width="width"
:data-height="height"
:data-limitMove="limitMove"
:data-windowHeight="sysInfo.windowHeight || 600"
:data-windowWidth="sysInfo.windowWidth || 400"
:data-imgTop="imgTop"
:data-imgLeft="imgLeft"
:data-imgWidth="imgWidth"
:data-imgHeight="imgHeight"
:data-angle="angle"
@touchend="parse.cutTouchEnd"
@touchstart="parse.cutTouchStart"
@touchmove="parse.cutTouchMove"
>
<view class="tui-content">
<view class="tui-content-top tui-bg-transparent" :style="{ transitionProperty: cutAnimation ? '' : 'background' }"></view>
<view class="tui-content-middle">
<view class="tui-bg-transparent tui-wxs-bg" :style="{ transitionProperty: cutAnimation ? '' : 'background' }"></view>
<view class="tui-cropper-box" :style="{ borderColor: borderColor, transitionProperty: cutAnimation ? '' : 'background' }">
<view
v-for="(item, index) in 4"
:key="index"
class="tui-edge"
:class="[`tui-${index < 2 ? 'top' : 'bottom'}-${index === 0 || index === 2 ? 'left' : 'right'}`]"
:style="{
width: edgeWidth,
height: edgeWidth,
borderColor: edgeColor,
borderWidth: edgeBorderWidth,
left: index === 0 || index === 2 ? `-${edgeOffsets}` : 'auto',
right: index === 1 || index === 3 ? `-${edgeOffsets}` : 'auto',
top: index < 2 ? `-${edgeOffsets}` : 'auto',
bottom: index > 1 ? `-${edgeOffsets}` : 'auto'
}"
></view>
</view>
<view class="tui-flex-auto tui-bg-transparent" :style="{ transitionProperty: cutAnimation ? '' : 'background' }"></view>
</view>
<view class="tui-flex-auto tui-bg-transparent" :style="{ transitionProperty: cutAnimation ? '' : 'background' }"></view>
</view>
<image
@load="imageLoad"
@error="imageLoad"
@touchstart="parse.touchstart"
@touchmove="parse.touchmove"
@touchend="parse.touchend"
:data-minScale="minScale"
:data-maxScale="maxScale"
:data-disableRotate="disableRotate"
:style="{
width: imgWidth ? imgWidth + 'px' : 'auto',
height: imgHeight ? imgHeight + 'px' : 'auto',
transitionDuration: (cutAnimation ? 0.3 : 0) + 's'
}"
class="tui-cropper-image"
:src="picturePath"
v-if="picturePath"
mode="widthFix"
></image>
</view>
<view class="tui-cropper-tabbar" v-if="!custom">
<view class="tui-op-btn" @tap.stop="back">取消</view>
<image :src="rotateImg" class="tui-rotate-img" @tap="setAngle"></image>
<view class="tui-op-btn" @tap.stop="getImage">完成</view>
</view>
</view>
</template>
<script src="./tui-cropper-app.wxs" module="parse" lang="wxs"></script>
<script>
/**
* 注意:组件中使用的图片地址,将文件复制到自己项目中
* 如果图片位置与组件同级,编译成小程序时图片会丢失
* 拷贝static下整个components文件夹
*也可直接转成base64(不建议)
*
* */
export default {
name: 'tuiCropperApp',
props: {
//图片路径
imageUrl: {
type: String,
default: ''
},
/*
默认正方形,可修改大小控制比例
裁剪框高度 px
*/
height: {
type: Number,
default: 280
},
//裁剪框宽度 px
width: {
type: Number,
default: 280
},
//裁剪框最小宽度 px
minWidth: {
type: Number,
default: 100
},
//裁剪框最小高度 px
minHeight: {
type: Number,
default: 100
},
//裁剪框最大宽度 px
maxWidth: {
type: Number,
default: 360
},
//裁剪框最大高度 px
maxHeight: {
type: Number,
default: 360
},
//裁剪框border颜色
borderColor: {
type: String,
default: 'rgba(255,255,255,0.1)'
},
//裁剪框边缘线颜色
edgeColor: {
type: String,
default: '#FFFFFF'
},
//裁剪框边缘线宽度 w=h
edgeWidth: {
type: String,
default: '34rpx'
},
//裁剪框边缘线border宽度
edgeBorderWidth: {
type: String,
default: '6rpx'
},
//偏移距离,根据edgeBorderWidth进行调整
edgeOffsets: {
type: String,
default: '6rpx'
},
/**
* 如果宽度和高度都为true则裁剪框禁止拖动
* 裁剪框宽度锁定
*/
lockWidth: {
type: Boolean,
default: false
},
//裁剪框高度锁定
lockHeight: {
type: Boolean,
default: false
},
//锁定裁剪框比例(放大或缩小)
lockRatio: {
type: Boolean,
default: false
},
//生成的图片尺寸相对剪裁框的比例
scaleRatio: {
type: Number,
default: 2
},
//图片的质量,取值范围为 (0, 1],不在范围内时当作1.0处理
quality: {
type: Number,
default: 0.8
},
//图片旋转角度[当前版本只能传90的倍数,否则可能导致裁剪失败或不正确]
rotateAngle: {
type: Number,
default: 0
},
//图片最小缩放比
minScale: {
type: Number,
default: 0.5
},
//图片最大缩放比
maxScale: {
type: Number,
default: 2
},
//是否禁用触摸旋转(为false则可以触摸转动图片,limitMove为false生效)
//此属性App端当前版本不可用,否则可能导致裁剪失败或不正确
disableRotate: {
type: Boolean,
default: true
},
//是否限制移动范围(剪裁框只能在图片内,为true不可触摸转动图片)
//注意:此属性当前版本不可传false,由于api不支持超出裁剪区域裁剪,所以只能限制在裁剪框内
limitMove: {
type: Boolean,
default: true
},
//自定义操作栏(为true时隐藏底部操作栏)
custom: {
type: Boolean,
default: false
},
//值发生改变开始裁剪(custom为true时生效)
startCutting: {
type: [Number, Boolean],
default: 0
},
/**
* 是否返回base64(H5端默认base64)
* 支持平台:App,微信小程序,支付宝小程序,H5(默认url就是base64)
**/
isBase64: {
type: Boolean,
default: false
},
//裁剪时是否显示loadding
loadding: {
type: Boolean,
default: true
},
//旋转icon
rotateImg: {
type: String,
default: '/static/components/cropper/img_rotate.png'
}
},
data() {
return {
TIME_CUT_CENTER: null,
cutX: 0, //画布x轴起点
cutY: 0, //画布y轴起点0
canvasWidth: 0,
canvasHeight: 0,
naturalWidth: 0,
naturalHeight: 0,
imgWidth: 0, //图片宽度
imgHeight: 0, //图片高度
scale: 1, //图片缩放比
angle: 0, //图片旋转角度
cutAnimation: false, //是否开启图片和裁剪框过渡
cutAnimationTime: null,
imgTop: 0, //图片上边距
imgLeft: 0, //图片左边距
sysInfo: {},
props: '',
sizeChange: 0, //2
angleChange: 0, //3
resetChange: 0, //4
centerChange: 0, //5
orientation: '',
picturePath: ''
};
},
watch: {
//定义变量然后利用change触发
imageUrl(val, oldVal) {
this.imageReset();
this.showLoading();
uni.getImageInfo({
src: val,
success: res => {
//计算图片尺寸
this.naturalWidth = res.width;
this.naturalHeight = res.height;
this.orientation = res.orientation;
if (this.orientation != 'up') {
//宽高传值颠倒
let width = this.orientation == 'down' ? res.width : res.height;
let height = this.orientation == 'down' ? res.height : res.width;
this.compressImage(val, width, height);
} else {
this.picturePath = val;
this.imgComputeSize(res.width, res.height);
if (this.limitMove) {
this.angleChange++;
this.props = `3,${this.angleChange}`;
}
}
},
fail: err => {
this.imgComputeSize();
if (this.limitMove) {
this.angleChange++;
this.props = `3,${this.angleChange}`;
}
}
});
},
rotateAngle(val) {
this.cutAnimation = true;
this.angle = val;
this.angleChanged(val);
},
cutAnimation(val) {
//开启过渡260毫秒之后自动关闭
clearTimeout(this.cutAnimationTime);
if (val) {
this.cutAnimationTime = setTimeout(() => {
this.cutAnimation = false;
}, 260);
}
},
limitMove(val) {
if (val) {
this.angleChanged(this.angle);
}
},
startCutting(val) {
if (this.custom && val) {
this.getImage();
}
}
},
created() {
this.picturePath = this.imageUrl;
},
mounted() {
this.sysInfo = uni.getSystemInfoSync();
this.imgTop = this.sysInfo.windowHeight / 2;
this.imgLeft = this.sysInfo.windowWidth / 2;
this.canvasHeight = this.height;
this.canvasWidth = this.width;
//初始化
setTimeout(() => {
this.props = '1,1';
}, 0);
setTimeout(() => {
this.$emit('ready', {});
}, 200);
},
methods: {
toast(title) {
uni.showToast({
title: title || '出错啦~',
icon: 'none'
});
},
async compressImage(url, width, height) {
let imgUrl = url;
if (~imgUrl.indexOf('https:')) {
imgUrl = await this.getLocalImage(url);
if (!imgUrl) {
this.toast('网络图片处理失败~');
return;
}
}
let defaultAngle =
{
up: 0,
down: 180,
left: 270,
right: 90
}[this.orientation] || 0;
let f_dst = `_documents/${this.unique()}.jpg`;
plus.zip.compressImage(
{
src: imgUrl,
dst: f_dst,
overwrite: true,
rotate: defaultAngle,
format: 'jpg'
},
i => {
this.picturePath = i.target;
this.imgComputeSize(width, height);
if (this.limitMove) {
this.angleChange++;
this.props = `3,${this.angleChange}`;
}
},
e => {
this.picturePath = imgUrl;
this.imgComputeSize(width, height);
if (this.limitMove) {
this.angleChange++;
this.props = `3,${this.angleChange}`;
}
}
);
},
//网络图片转成本地文件[同步执行]
async getLocalImage(url) {
return await new Promise((resolve, reject) => {
uni.downloadFile({
url: url,
success: res => {
resolve(res.tempFilePath);
},
fail: res => {
reject(false);
}
});
});
},
//返回裁剪后图片信息
getImage() {
if (!this.picturePath) {
this.toast('请选择图片');
return;
}
this.loadding && this.showLoading();
let cutting = async () => {
//图片实际大小
let imgUrl = this.picturePath;
if (~this.picturePath.indexOf('https:')) {
imgUrl = await this.getLocalImage(this.picturePath);
if (!imgUrl) {
this.toast('网络图片处理失败~');
return;
}
}
let data = {
url: '',
base64: ''
};
let f_dst = `_documents/${this.unique()}.jpg`;
let multiple = Math.round(this.angle / 90);
let angle = 0,
x = 0,
y = 0,
left = 0,
top = 0,
clipHeight = 0,
clipWidth = 0;
let isAndroid = this.sysInfo.platform.toLocaleLowerCase() == 'android';
if (multiple % 2 == 0) {
angle = this.angle % 360 == 0 || this.angle == 0 ? 0 : 180;
if (!isAndroid || (isAndroid && angle == 0)) {
x = this.imgLeft - (this.imgWidth * this.scale) / 2;
y = this.imgTop - (this.imgHeight * this.scale) / 2;
left = (((this.cutX - x) / this.imgWidth / this.scale) * 100).toFixed(2);
top = (((this.cutY - y) / this.imgHeight / this.scale) * 100).toFixed(2);
clipWidth = ((this.canvasWidth / this.imgWidth / this.scale) * 100).toFixed(2);
clipHeight = ((this.canvasHeight / this.imgHeight / this.scale) * 100).toFixed(2);
} else {
x = this.imgLeft - (this.imgWidth * this.scale) / 2;
y = this.imgTop - (this.imgHeight * this.scale) / 2;
left = (((this.imgWidth * this.scale - (this.cutX - x) - this.canvasWidth) / this.imgWidth / this.scale) * 100).toFixed(2);
top = (((this.imgHeight * this.scale - (this.cutY - y) - this.canvasHeight) / this.imgHeight / this.scale) * 100).toFixed(2);
clipWidth = ((this.canvasWidth / this.imgWidth / this.scale) * 100).toFixed(2);
clipHeight = ((this.canvasHeight / this.imgHeight / this.scale) * 100).toFixed(2);
}
} else {
angle = this.angle % 270 == 0 ? 270 : 90;
if (isAndroid) {
if (angle == 90) {
x = this.imgLeft - (this.imgHeight * this.scale) / 2;
y = this.imgTop - (this.imgWidth * this.scale) / 2;
top = (((this.imgHeight * this.scale - (this.cutX - x) - this.canvasHeight) / this.imgHeight / this.scale) * 100).toFixed(2);
left = (((this.imgWidth * this.scale - (this.cutY - y) - this.canvasWidth) / this.imgWidth / this.scale) * 100).toFixed(2);
clipHeight = ((this.canvasWidth / this.imgHeight / this.scale) * 100).toFixed(2);
clipWidth = ((this.canvasHeight / this.imgWidth / this.scale) * 100).toFixed(2);
} else {
x = this.imgLeft - (this.imgHeight * this.scale) / 2;
y = this.imgTop - (this.imgWidth * this.scale) / 2;
top = (((this.cutX - x) / this.imgHeight / this.scale) * 100).toFixed(2);
left = (((this.cutY - y) / this.imgWidth / this.scale) * 100).toFixed(2);
clipHeight = ((this.canvasWidth / this.imgHeight / this.scale) * 100).toFixed(2);
clipWidth = ((this.canvasHeight / this.imgWidth / this.scale) * 100).toFixed(2);
}
} else {
x = this.imgLeft - (this.imgHeight * this.scale) / 2;
y = this.imgTop - (this.imgWidth * this.scale) / 2;
left = (((this.cutX - x) / this.imgHeight / this.scale) * 100).toFixed(2);
top = (((this.cutY - y) / this.imgWidth / this.scale) * 100).toFixed(2);
clipWidth = ((this.canvasWidth / this.imgHeight / this.scale) * 100).toFixed(2);
clipHeight = ((this.canvasHeight / this.imgWidth / this.scale) * 100).toFixed(2);
}
}
let width = (this.imgWidth < this.naturalWidth ? this.naturalWidth : this.imgWidth) * this.scale;
let height = (this.imgHeight < this.naturalHeight ? this.naturalHeight : this.imgHeight) * this.scale;
// if (isAndroid && width > 800) {
// width = '800px';
// height = 'auto'
// } else {
// width = `${width}px`;
// height = `${height}px`
// }
width = `${width}px`;
height = `${height}px`;
left = Number(left) <= 0 ? 0 : left;
top = Number(top) <= 0 ? 0 : top;
plus.zip.compressImage(
{
src: imgUrl,
dst: f_dst,
quality: this.quality * 100,
overwrite: true,
format: 'jpg',
width: width,
height: height,
rotate: angle,
clip: {
top: `${top}%`,
left: `${left}%`,
width: `${clipWidth}%`,
height: `${clipHeight}%`
}
},
i => {
this.loadding && uni.hideLoading();
data.url = i.target;
if (this.isBase64) {
plus.io.resolveLocalFileSystemURL(f_dst, entry => {
entry.file(
file => {
let reader = new plus.io.FileReader();
reader.onloadend = e => {
data.base64 = e.target.result;
this.$emit('cropper', data);
};
reader.readAsDataURL(file);
},
e => {
//转换base64失败,传回图片url
this.$emit('cropper', data);
}
);
});
} else {
this.$emit('cropper', data);
}
},
e => {
console.log(e);
this.toast('图片裁剪失败,请稍候再试~');
//原图输出
// data.url = imgUrl;
// this.$emit('cropper', data);
}
);
};
setTimeout(() => {
cutting();
}, 20);
},
unique(n = 6) {
let rnd = '';
for (let i = 0; i < n; i++) rnd += Math.floor(Math.random() * 10);
return 'thorui_' + new Date().getTime() + rnd;
},
change(e) {
this.cutX = e.cutX || 0;
this.cutY = e.cutY || 0;
this.canvasWidth = e.canvasWidth || this.width;
this.canvasHeight = e.canvasHeight || this.height;
this.imgWidth = e.imgWidth || this.imgWidth;
this.imgHeight = e.imgHeight || this.imgHeight;
this.scale = e.scale || 1;
this.angle = e.angle || 0;
this.imgTop = e.imgTop || 0;
this.imgLeft = e.imgLeft || 0;
},
imageReset() {
this.scale = 1;
this.angle = 0;
let sys = this.sysInfo.windowHeight ? this.sysInfo : uni.getSystemInfoSync();
this.imgTop = sys.windowHeight / 2;
this.imgLeft = sys.windowWidth / 2;
this.resetChange++;
this.props = `4,${this.resetChange}`;
//初始化旋转角度 0deg
this.$emit('initAngle', {});
},
imageLoad(e) {
this.imageReset();
uni.hideLoading();
this.$emit('imageLoad', {});
},
imgComputeSize(width, height) {
//默认按图片最小边 = 对应裁剪框尺寸
let imgWidth = width,
imgHeight = height;
if (imgWidth && imgHeight) {
if (imgWidth / imgHeight > this.width / this.height) {
imgHeight = this.height;
imgWidth = (width / height) * imgHeight;
} else {
imgWidth = this.width;
imgHeight = (height / width) * imgWidth;
}
} else {
let sys = this.sysInfo || uni.getSystemInfoSync();
imgWidth = sys.windowWidth;
imgHeight = 0;
}
this.imgWidth = imgWidth;
this.imgHeight = imgHeight;
this.sizeChange++;
this.props = `2,${this.sizeChange}`;
},
moveStop() {
clearTimeout(this.TIME_CUT_CENTER);
this.TIME_CUT_CENTER = setTimeout(() => {
if (!this.cutAnimation) {
this.cutAnimation = true;
}
this.centerChange++;
this.props = `5,${this.centerChange}`;
}, 666);
},
moveDuring() {
clearTimeout(this.TIME_CUT_CENTER);
},
showLoading() {
uni.showLoading({
title: '请稍候...',
mask: true
});
},
stop() {},
back() {
uni.navigateBack();
},
angleChanged(val) {
this.moveStop();
if (this.limitMove && val % 90) {
this.angle = Math.round(val / 90) * 90;
}
this.angleChange++;
this.props = `3,${this.angleChange}`;
},
setAngle() {
this.cutAnimation = true;
this.angle = this.angle + 90;
this.angleChanged(this.angle);
}
}
};
</script>
<style scoped>
.tui-container {
width: 100vw;
height: 100vh;
background-color: rgba(0, 0, 0, 0.6);
position: fixed;
top: 0;
left: 0;
z-index: 1;
}
.tui-image-cropper {
width: 100vw;
height: 100vh;
position: absolute;
}
.tui-content {
width: 100vw;
height: 100vh;
position: absolute;
z-index: 9;
display: flex;
flex-direction: column;
pointer-events: none;
}
.tui-bg-transparent {
background-color: rgba(0, 0, 0, 0.6);
transition-duration: 0.3s;
}
.tui-content-top {
pointer-events: none;
}
.tui-content-middle {
width: 100%;
height: 200px;
display: flex;
box-sizing: border-box;
}
.tui-cropper-box {
position: relative;
/* transition-duration: 0.2s; */
border-style: solid;
border-width: 1rpx;
box-sizing: border-box;
}
.tui-flex-auto {
flex: auto;
}
.tui-cropper-image {
width: 100%;
border-style: none;
position: absolute;
top: 0;
left: 0;
z-index: 2;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
transform-origin: center;
}
.tui-edge {
border-style: solid;
pointer-events: auto;
position: absolute;
box-sizing: border-box;
}
.tui-top-left {
border-bottom-width: 0 !important;
border-right-width: 0 !important;
}
.tui-top-right {
border-bottom-width: 0 !important;
border-left-width: 0 !important;
}
.tui-bottom-left {
border-top-width: 0 !important;
border-right-width: 0 !important;
}
.tui-bottom-right {
border-top-width: 0 !important;
border-left-width: 0 !important;
}
.tui-cropper-tabbar {
width: 100%;
height: 120rpx;
padding: 0 40rpx;
box-sizing: border-box;
position: fixed;
left: 0;
bottom: 0;
z-index: 99;
display: flex;
align-items: center;
justify-content: space-between;
color: #ffffff;
font-size: 32rpx;
}
.tui-cropper-tabbar::after {
content: ' ';
position: absolute;
top: 0;
right: 0;
left: 0;
border-top: 1rpx solid rgba(255, 255, 255, 0.2);
-webkit-transform: scaleY(0.5) translateZ(0);
transform: scaleY(0.5) translateZ(0);
transform-origin: 0 100%;
}
.tui-op-btn {
height: 80rpx;
display: flex;
align-items: center;
}
.tui-rotate-img {
width: 44rpx;
height: 44rpx;
}
</style>
@@ -0,0 +1,560 @@
var cropper = {
CUT_START: null,
cutX: 0, //画布x轴起点
cutY: 0, //画布y轴起点0
touchRelative: [{
x: 0,
y: 0
}], //手指或鼠标和图片中心的相对位置
flagCutTouch: false, //是否是拖动裁剪框
hypotenuseLength: 0, //双指触摸时斜边长度
flagEndTouch: false, //是否结束触摸
canvasWidth: 0,
canvasHeight: 0,
imgWidth: 0, //图片宽度
imgHeight: 0, //图片高度
scale: 1, //图片缩放比
angle: 0, //图片旋转角度
imgTop: 0, //图片上边距
imgLeft: 0, //图片左边距
//是否限制移动范围(剪裁框只能在图片内,为true不可触摸转动图片)
limitMove: true,
minHeight: 0,
maxHeight: 0,
minWidth: 0,
maxWidth: 0,
windowHeight: 0,
windowWidth: 0,
init: true
}
function bool(str) {
return str === 'true' || str == true ? true : false
}
function touchstart(e, ins) {
//var instance = e.instance;
// var state = instance.getState();
var touch = e.touches || e.changedTouches;
cropper.flagEndTouch = false;
if (touch.length == 1) {
cropper.touchRelative[0] = {
x: touch[0].pageX - cropper.imgLeft,
y: touch[0].pageY - cropper.imgTop
};
} else {
var width = Math.abs(touch[0].pageX - touch[1].pageX);
var height = Math.abs(touch[0].pageY - touch[1].pageY);
cropper.touchRelative = [{
x: touch[0].pageX - cropper.imgLeft,
y: touch[0].pageY - cropper.imgTop
},
{
x: touch[1].pageX - cropper.imgLeft,
y: touch[1].pageY - cropper.imgTop
}
];
cropper.hypotenuseLength = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2));
}
}
function moveDuring(ins) {
if (!ins) return;
ins.callMethod('moveDuring')
}
function moveStop(ins) {
if (!ins) return;
ins.callMethod('moveStop')
};
function setCutCenter(ins) {
var cutY = (cropper.windowHeight - cropper.canvasHeight) * 0.5;
var cutX = (cropper.windowWidth - cropper.canvasWidth) * 0.5;
//顺序不能变
cropper.imgTop = cropper.imgTop - cropper.cutY + cutY;
cropper.cutY = cutY; //截取的框上边距
cropper.imgLeft = cropper.imgLeft - cropper.cutX + cutX;
cropper.cutX = cutX; //截取的框左边距
styleUpdate(ins)
cutDetectionPosition(ins)
imgTransform(ins)
updateData(ins)
}
function touchmove(e, ins) {
var touch = e.touches || e.changedTouches;
if (cropper.flagEndTouch) return;
moveDuring(ins);
if (e.touches.length == 1) {
var left = touch[0].pageX - cropper.touchRelative[0].x,
top = touch[0].pageY - cropper.touchRelative[0].y;
cropper.imgLeft = left;
cropper.imgTop = top;
imgTransform(ins);
imgMarginDetectionPosition(ins);
} else {
var res = e.instance.getDataset();
var minScale = +res.minscale;
var maxScale = +res.maxscale;
var disableRotate = bool(res.disablerotate)
var width = Math.abs(touch[0].pageX - touch[1].pageX),
height = Math.abs(touch[0].pageY - touch[1].pageY),
hypotenuse = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2)),
scale = cropper.scale * (hypotenuse / cropper.hypotenuseLength),
current_deg = 0;
scale = scale <= minScale ? minScale : scale;
scale = scale >= maxScale ? maxScale : scale;
cropper.scale = scale;
imgMarginDetectionScale(ins, true);
var touchRelative = [{
x: touch[0].pageX - cropper.imgLeft,
y: touch[0].pageY - cropper.imgTop
},
{
x: touch[1].pageX - cropper.imgLeft,
y: touch[1].pageY - cropper.imgTop
}
];
if (!disableRotate) {
var first_atan = (180 / Math.PI) * Math.atan2(touchRelative[0].y, touchRelative[0].x);
var first_atan_old = (180 / Math.PI) * Math.atan2(cropper.touchRelative[0].y, cropper.touchRelative[0].x);
var second_atan = (180 / Math.PI) * Math.atan2(touchRelative[1].y, touchRelative[1].x);
var second_atan_old = (180 / Math.PI) * Math.atan2(cropper.touchRelative[1].y, cropper.touchRelative[1].x);
var first_deg = first_atan - first_atan_old,
second_deg = second_atan - second_atan_old;
if (first_deg != 0) {
current_deg = first_deg;
} else if (second_deg != 0) {
current_deg = second_deg;
}
}
cropper.touchRelative = touchRelative;
cropper.hypotenuseLength = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2));
//更新视图
cropper.angle = cropper.angle + current_deg;
imgTransform(ins);
}
}
function touchend(e, ins) {
cropper.flagEndTouch = true;
moveStop(ins);
updateData(ins)
}
function cutTouchStart(e, ins) {
var touch = e.touches || e.changedTouches;
var currentX = touch[0].pageX;
var currentY = touch[0].pageY;
/*
* (右下-1 右上-2 左上-3 左下-4)
* left_x [3,4]
* top_y [2,3]
* right_x [1,2]
* bottom_y [1,4]
*/
var left_x1 = cropper.cutX - 30;
var left_x2 = cropper.cutX + 30;
var top_y1 = cropper.cutY - 30;
var top_y2 = cropper.cutY + 30;
var right_x1 = cropper.cutX + cropper.canvasWidth - 30;
var right_x2 = cropper.cutX + cropper.canvasWidth + 30;
var bottom_y1 = cropper.cutY + cropper.canvasHeight - 30;
var bottom_y2 = cropper.cutY + cropper.canvasHeight + 30;
if (currentX > right_x1 && currentX < right_x2 && currentY > bottom_y1 && currentY < bottom_y2) {
moveDuring();
cropper.flagCutTouch = true;
cropper.flagEndTouch = true;
cropper.CUT_START = {
width: cropper.canvasWidth,
height: cropper.canvasHeight,
x: currentX,
y: currentY,
corner: 1
};
} else if (currentX > right_x1 && currentX < right_x2 && currentY > top_y1 && currentY < top_y2) {
moveDuring();
cropper.flagCutTouch = true;
cropper.flagEndTouch = true;
cropper.CUT_START = {
width: cropper.canvasWidth,
height: cropper.canvasHeight,
x: currentX,
y: currentY,
cutY: cropper.cutY,
cutX: cropper.cutX,
corner: 2
};
} else if (currentX > left_x1 && currentX < left_x2 && currentY > top_y1 && currentY < top_y2) {
moveDuring();
cropper.flagCutTouch = true;
cropper.flagEndTouch = true;
cropper.CUT_START = {
width: cropper.canvasWidth,
height: cropper.canvasHeight,
cutY: cropper.cutY,
cutX: cropper.cutX,
x: currentX,
y: currentY,
corner: 3
};
} else if (currentX > left_x1 && currentX < left_x2 && currentY > bottom_y1 && currentY < bottom_y2) {
moveDuring();
cropper.flagCutTouch = true;
cropper.flagEndTouch = true;
cropper.CUT_START = {
width: cropper.canvasWidth,
height: cropper.canvasHeight,
cutY: cropper.cutY,
cutX: cropper.cutX,
x: currentX,
y: currentY,
corner: 4
};
}
}
function cutTouchMove(e, ins) {
if (!cropper.CUT_START || cropper.CUT_START === 'null') return;
if (cropper.flagCutTouch) {
var touch = e.touches || e.changedTouches;
var res = e.instance.getDataset();
var lockRatio = bool(res.lockratio);
var lockWidth = bool(res.lockwidth);
var lockHeight = bool(res.lockheight);
if (lockRatio && (lockWidth || lockHeight)) return;
var width = cropper.canvasWidth,
height = cropper.canvasHeight,
cutY = cropper.cutY,
cutX = cropper.cutX;
var size_correct = function() {
width = width <= cropper.maxWidth ? (width >= cropper.minWidth ? width : cropper.minWidth) : cropper.maxWidth;
height = height <= cropper.maxHeight ? (height >= cropper.minHeight ? height : cropper.minHeight) : cropper.maxHeight;
}
var size_inspect = function() {
if ((width > cropper.maxWidth || width < cropper.minWidth || height > cropper.maxHeight || height < cropper.minHeight) &&
lockRatio) {
size_correct();
return false;
} else {
size_correct();
return true;
}
};
height = cropper.CUT_START.height + (cropper.CUT_START.corner > 1 && cropper.CUT_START.corner < 4 ? 1 : -1) * (
cropper.CUT_START.y - touch[0].pageY);
switch (cropper.CUT_START.corner) {
case 1:
width = cropper.CUT_START.width - cropper.CUT_START.x + touch[0].pageX;
if (lockRatio) {
height = width / (cropper.canvasWidth / cropper.canvasHeight);
}
if (!size_inspect()) return;
break;
case 2:
width = cropper.CUT_START.width - cropper.CUT_START.x + touch[0].pageX;
if (lockRatio) {
height = width / (cropper.canvasWidth / cropper.canvasHeight);
}
if (!size_inspect()) return;
cutY = cropper.CUT_START.cutY - (height - cropper.CUT_START.height);
break;
case 3:
width = cropper.CUT_START.width + cropper.CUT_START.x - touch[0].pageX;
if (lockRatio) {
height = width / (cropper.canvasWidth / cropper.canvasHeight);
}
if (!size_inspect()) return;
cutY = cropper.CUT_START.cutY - (height - cropper.CUT_START.height);
cutX = cropper.CUT_START.cutX - (width - cropper.CUT_START.width);
break;
case 4:
width = cropper.CUT_START.width + cropper.CUT_START.x - touch[0].pageX;
if (lockRatio) {
height = width / (cropper.canvasWidth / cropper.canvasHeight);
}
if (!size_inspect()) return;
cutX = cropper.CUT_START.cutX - (width - cropper.CUT_START.width);
break;
default:
break;
}
if (!lockWidth && !lockHeight) {
cropper.canvasWidth = width;
cropper.cutX = cutX;
cropper.canvasHeight = height;
cropper.cutY = cutY;
canvasHeight(ins);
canvasWidth(ins);
} else if (!lockWidth) {
cropper.canvasWidth = width;
cropper.cutX = cutX;
canvasWidth(ins);
} else if (!lockHeight) {
cropper.canvasHeight = height;
cropper.cutY = cutY;
canvasHeight(ins);
}
styleUpdate(ins)
imgMarginDetectionScale(ins);
}
}
//检测剪裁框位置是否在允许的范围内(屏幕内)
function cutDetectionPosition(ins) {
var windowHeight = cropper.windowHeight,
windowWidth = cropper.windowWidth;
var cutDetectionPositionTop = function() {
//检测上边距是否在范围内
if (cropper.cutY < 0) {
cropper.cutY = 0;
}
if (cropper.cutY > windowHeight - cropper.canvasHeight) {
cropper.cutY = windowHeight - cropper.canvasHeight;
}
}
var cutDetectionPositionLeft = function() {
//检测左边距是否在范围内
if (cropper.cutX < 0) {
cropper.cutX = 0;
}
if (cropper.cutX > windowWidth - cropper.canvasWidth) {
cropper.cutX = windowWidth - cropper.canvasWidth;
}
}
//裁剪框坐标处理(如果只写一个参数则另一个默认为0,都不写默认居中)
if (cropper.cutY == null && cropper.cutX == null) {
var cutY = (windowHeight - cropper.canvasHeight) * 0.5;
var cutX = (windowWidth - cropper.canvasWidth) * 0.5;
cropper.cutY = cutY; //截取的框上边距
cropper.cutX = cutX; //截取的框左边距
} else if (cropper.cutY != null && cropper.cutX != null) {
cutDetectionPositionTop();
cutDetectionPositionLeft();
} else if (cropper.cutY != null && cropper.cutX == null) {
cutDetectionPositionTop();
cropper.cutX = (windowWidth - cropper.canvasWidth) / 2;
} else if (cropper.cutY == null && cropper.cutX != null) {
cutDetectionPositionLeft();
cropper.cutY = (windowHeight - cropper.canvasHeight) / 2;
}
styleUpdate(ins)
}
/**
* 图片边缘检测-缩放
*/
function imgMarginDetectionScale(ins, delay) {
if (!cropper.limitMove) return;
var scale = cropper.scale;
var imgWidth = cropper.imgWidth;
var imgHeight = cropper.imgHeight;
if ((cropper.angle / 90) % 2) {
imgWidth = cropper.imgHeight;
imgHeight = cropper.imgWidth;
}
if (imgWidth * scale < cropper.canvasWidth) {
scale = cropper.canvasWidth / imgWidth;
}
if (imgHeight * scale < cropper.canvasHeight) {
scale = Math.max(scale, cropper.canvasHeight / imgHeight);
}
imgMarginDetectionPosition(ins, scale, delay);
}
/**
* 图片边缘检测-位置
*/
function imgMarginDetectionPosition(ins, scale, delay) {
if (!cropper.limitMove) return;
var left = cropper.imgLeft;
var top = cropper.imgTop;
scale = scale || cropper.scale;
var imgWidth = cropper.imgWidth;
var imgHeight = cropper.imgHeight;
if ((cropper.angle / 90) % 2) {
imgWidth = cropper.imgHeight;
imgHeight = cropper.imgWidth;
}
left = cropper.cutX + (imgWidth * scale) / 2 >= left ? left : cropper.cutX + (imgWidth * scale) / 2;
left = cropper.cutX + cropper.canvasWidth - (imgWidth * scale) / 2 <= left ? left : cropper.cutX + cropper.canvasWidth -
(imgWidth * scale) / 2;
top = cropper.cutY + (imgHeight * scale) / 2 >= top ? top : cropper.cutY + (imgHeight * scale) / 2;
top = cropper.cutY + cropper.canvasHeight - (imgHeight * scale) / 2 <= top ? top : cropper.cutY + cropper.canvasHeight -
(imgHeight * scale) / 2;
cropper.imgLeft = left;
cropper.imgTop = top;
cropper.scale = scale;
styleUpdate(ins)
if (!delay || delay === 'null') {
imgTransform(ins);
}
}
function cutTouchEnd(e, ins) {
moveStop(ins);
cropper.flagCutTouch = false;
updateData(ins)
}
//改变截取框大小
function computeCutSize(ins) {
if (cropper.canvasWidth > cropper.windowWidth) {
cropper.canvasWidth = cropper.windowWidth;
// canvasWidth(ins)
} else if (cropper.canvasWidth + cropper.cutX > cropper.windowWidth) {
cropper.cutX = cropper.windowWidth - cropper.cutX;
}
if (cropper.canvasHeight > cropper.windowHeight) {
cropper.canvasHeight = cropper.windowHeight;
// canvasHeight(ins)
} else if (cropper.canvasHeight + cropper.cutY > cropper.windowHeight) {
cropper.cutY = cropper.windowHeight - cropper.cutY;
}
// styleUpdate(ins)
}
function styleUpdate(ins) {
if (!ins) return;
ins.selectComponent('.tui-cropper-box').setStyle({
'width': cropper.canvasWidth + 'px',
'height': cropper.canvasHeight + 'px'
})
ins.selectComponent('.tui-content-middle').setStyle({
'height': cropper.canvasHeight + 'px'
})
ins.selectComponent('.tui-content-top').setStyle({
'height': cropper.cutY + 'px'
})
ins.selectComponent('.tui-wxs-bg').setStyle({
'width': cropper.cutX + 'px'
})
}
function imgTransform(ins) {
var owner = ins.selectComponent('.tui-cropper-image')
if (!owner) return
var x = cropper.imgLeft - cropper.imgWidth / 2;
var y = cropper.imgTop - cropper.imgHeight / 2;
owner.setStyle({
'transform': 'translate3d(' + x + 'px,' + y + 'px,0) scale(' + cropper.scale + ') rotate(' + cropper.angle + 'deg)'
})
}
function imageReset(ins) {
cropper.scale = 1;
cropper.angle = 0;
imgTransform(ins);
}
//监听截取框宽高变化
function canvasWidth(ins) {
if (cropper.canvasWidth < cropper.minWidth) {
cropper.canvasWidth = cropper.minWidth;
}
if (!ins) return;
computeCutSize(ins);
}
function canvasHeight(ins) {
if (cropper.canvasHeight < cropper.minHeight) {
cropper.canvasHeight = cropper.minHeight;
}
if (!ins) return;
computeCutSize(ins);
}
function updateData(ins) {
if (!ins) return;
ins.callMethod('change', {
cutX: cropper.cutX,
cutY: cropper.cutY,
canvasWidth: cropper.canvasWidth,
canvasHeight: cropper.canvasHeight,
imgWidth: cropper.imgWidth,
imgHeight: cropper.imgHeight,
scale: cropper.scale,
angle: cropper.angle,
imgTop: cropper.imgTop,
imgLeft: cropper.imgLeft
})
}
function propsChange(prop, oldProp, ownerInstance, ins) {
if (prop && prop !== 'null') {
var params = prop.split(',')
var type = +params[0]
var dataset = ins.getDataset();
if (cropper.init || type == 4) {
cropper.maxHeight = +dataset.maxheight;
cropper.minHeight = +dataset.minheight;
cropper.maxWidth = +dataset.maxwidth;
cropper.minWidth = +dataset.minwidth;
cropper.canvasWidth = +dataset.width;
cropper.canvasHeight = +dataset.height;
cropper.imgTop = dataset.windowheight / 2;
cropper.imgLeft = dataset.windowwidth / 2;
cropper.imgWidth = +dataset.imgwidth;
cropper.imgHeight = +dataset.imgheight;
cropper.windowHeight = +dataset.windowheight;
cropper.windowWidth = +dataset.windowwidth;
cropper.init = false
} else if (type == 2 || type == 3) {
cropper.imgWidth = +dataset.imgwidth;
cropper.imgHeight = +dataset.imgheight;
}
cropper.limitMove = bool(dataset.limitmove);
cropper.angle = +dataset.angle;
if (type == 3) {
imgTransform(ownerInstance);
}
switch (type) {
case 1:
setCutCenter(ownerInstance);
//设置裁剪框大小>设置图片尺寸>绘制canvas
computeCutSize(ownerInstance);
//检查裁剪框是否在范围内
cutDetectionPosition(ownerInstance);
break;
case 2:
setCutCenter(ownerInstance);
break;
case 3:
imgMarginDetectionScale(ownerInstance)
break;
case 4:
imageReset(ownerInstance);
break;
case 5:
setCutCenter(ownerInstance);
break;
default:
break;
}
}
}
module.exports = {
touchstart: touchstart,
touchmove: touchmove,
touchend: touchend,
cutTouchStart: cutTouchStart,
cutTouchMove: cutTouchMove,
cutTouchEnd: cutTouchEnd,
propsChange: propsChange
}