info
This commit is contained in:
@@ -0,0 +1,560 @@
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var cropper = {
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CUT_START: null,
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cutX: 0, //画布x轴起点
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cutY: 0, //画布y轴起点0
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touchRelative: [{
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x: 0,
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y: 0
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}], //手指或鼠标和图片中心的相对位置
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flagCutTouch: false, //是否是拖动裁剪框
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hypotenuseLength: 0, //双指触摸时斜边长度
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flagEndTouch: false, //是否结束触摸
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canvasWidth: 0,
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canvasHeight: 0,
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imgWidth: 0, //图片宽度
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imgHeight: 0, //图片高度
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scale: 1, //图片缩放比
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angle: 0, //图片旋转角度
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imgTop: 0, //图片上边距
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imgLeft: 0, //图片左边距
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//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)
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limitMove: true,
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minHeight: 0,
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maxHeight: 0,
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minWidth: 0,
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maxWidth: 0,
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windowHeight: 0,
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windowWidth: 0,
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init: true
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}
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function bool(str) {
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return str === 'true' || str == true ? true : false
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}
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function touchstart(e, ins) {
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//var instance = e.instance;
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// var state = instance.getState();
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var touch = e.touches || e.changedTouches;
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cropper.flagEndTouch = false;
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if (touch.length == 1) {
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cropper.touchRelative[0] = {
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x: touch[0].pageX - cropper.imgLeft,
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y: touch[0].pageY - cropper.imgTop
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};
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} else {
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var width = Math.abs(touch[0].pageX - touch[1].pageX);
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var height = Math.abs(touch[0].pageY - touch[1].pageY);
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cropper.touchRelative = [{
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x: touch[0].pageX - cropper.imgLeft,
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y: touch[0].pageY - cropper.imgTop
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},
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{
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x: touch[1].pageX - cropper.imgLeft,
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y: touch[1].pageY - cropper.imgTop
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}
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];
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cropper.hypotenuseLength = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2));
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}
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}
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function moveDuring(ins) {
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if (!ins) return;
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ins.callMethod('moveDuring')
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}
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function moveStop(ins) {
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if (!ins) return;
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ins.callMethod('moveStop')
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};
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function setCutCenter(ins) {
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var cutY = (cropper.windowHeight - cropper.canvasHeight) * 0.5;
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var cutX = (cropper.windowWidth - cropper.canvasWidth) * 0.5;
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//顺序不能变
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cropper.imgTop = cropper.imgTop - cropper.cutY + cutY;
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cropper.cutY = cutY; //截取的框上边距
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cropper.imgLeft = cropper.imgLeft - cropper.cutX + cutX;
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cropper.cutX = cutX; //截取的框左边距
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styleUpdate(ins)
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cutDetectionPosition(ins)
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imgTransform(ins)
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updateData(ins)
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}
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function touchmove(e, ins) {
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var touch = e.touches || e.changedTouches;
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if (cropper.flagEndTouch) return;
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moveDuring(ins);
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if (e.touches.length == 1) {
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var left = touch[0].pageX - cropper.touchRelative[0].x,
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top = touch[0].pageY - cropper.touchRelative[0].y;
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cropper.imgLeft = left;
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cropper.imgTop = top;
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imgTransform(ins);
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imgMarginDetectionPosition(ins);
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} else {
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var res = e.instance.getDataset();
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var minScale = +res.minscale;
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var maxScale = +res.maxscale;
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var disableRotate = bool(res.disablerotate)
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var width = Math.abs(touch[0].pageX - touch[1].pageX),
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height = Math.abs(touch[0].pageY - touch[1].pageY),
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hypotenuse = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2)),
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scale = cropper.scale * (hypotenuse / cropper.hypotenuseLength),
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current_deg = 0;
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scale = scale <= minScale ? minScale : scale;
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scale = scale >= maxScale ? maxScale : scale;
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cropper.scale = scale;
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imgMarginDetectionScale(ins, true);
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var touchRelative = [{
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x: touch[0].pageX - cropper.imgLeft,
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y: touch[0].pageY - cropper.imgTop
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},
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{
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x: touch[1].pageX - cropper.imgLeft,
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y: touch[1].pageY - cropper.imgTop
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}
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];
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if (!disableRotate) {
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var first_atan = (180 / Math.PI) * Math.atan2(touchRelative[0].y, touchRelative[0].x);
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var first_atan_old = (180 / Math.PI) * Math.atan2(cropper.touchRelative[0].y, cropper.touchRelative[0].x);
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var second_atan = (180 / Math.PI) * Math.atan2(touchRelative[1].y, touchRelative[1].x);
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var second_atan_old = (180 / Math.PI) * Math.atan2(cropper.touchRelative[1].y, cropper.touchRelative[1].x);
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var first_deg = first_atan - first_atan_old,
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second_deg = second_atan - second_atan_old;
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if (first_deg != 0) {
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current_deg = first_deg;
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} else if (second_deg != 0) {
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current_deg = second_deg;
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}
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}
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cropper.touchRelative = touchRelative;
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cropper.hypotenuseLength = Math.sqrt(Math.pow(width, 2) + Math.pow(height, 2));
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//更新视图
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cropper.angle = cropper.angle + current_deg;
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imgTransform(ins);
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}
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}
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function touchend(e, ins) {
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cropper.flagEndTouch = true;
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moveStop(ins);
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updateData(ins)
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}
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function cutTouchStart(e, ins) {
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var touch = e.touches || e.changedTouches;
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var currentX = touch[0].pageX;
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var currentY = touch[0].pageY;
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/*
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* (右下-1 右上-2 左上-3 左下-4)
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* left_x [3,4]
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* top_y [2,3]
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* right_x [1,2]
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* bottom_y [1,4]
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*/
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var left_x1 = cropper.cutX - 30;
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var left_x2 = cropper.cutX + 30;
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var top_y1 = cropper.cutY - 30;
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var top_y2 = cropper.cutY + 30;
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var right_x1 = cropper.cutX + cropper.canvasWidth - 30;
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var right_x2 = cropper.cutX + cropper.canvasWidth + 30;
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var bottom_y1 = cropper.cutY + cropper.canvasHeight - 30;
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var bottom_y2 = cropper.cutY + cropper.canvasHeight + 30;
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if (currentX > right_x1 && currentX < right_x2 && currentY > bottom_y1 && currentY < bottom_y2) {
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moveDuring();
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cropper.flagCutTouch = true;
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cropper.flagEndTouch = true;
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cropper.CUT_START = {
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width: cropper.canvasWidth,
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height: cropper.canvasHeight,
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x: currentX,
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y: currentY,
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corner: 1
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};
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} else if (currentX > right_x1 && currentX < right_x2 && currentY > top_y1 && currentY < top_y2) {
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moveDuring();
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cropper.flagCutTouch = true;
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cropper.flagEndTouch = true;
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cropper.CUT_START = {
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width: cropper.canvasWidth,
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height: cropper.canvasHeight,
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x: currentX,
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y: currentY,
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cutY: cropper.cutY,
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cutX: cropper.cutX,
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corner: 2
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};
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} else if (currentX > left_x1 && currentX < left_x2 && currentY > top_y1 && currentY < top_y2) {
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moveDuring();
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cropper.flagCutTouch = true;
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cropper.flagEndTouch = true;
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cropper.CUT_START = {
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width: cropper.canvasWidth,
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height: cropper.canvasHeight,
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cutY: cropper.cutY,
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cutX: cropper.cutX,
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x: currentX,
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y: currentY,
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corner: 3
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};
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} else if (currentX > left_x1 && currentX < left_x2 && currentY > bottom_y1 && currentY < bottom_y2) {
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moveDuring();
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cropper.flagCutTouch = true;
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cropper.flagEndTouch = true;
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cropper.CUT_START = {
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width: cropper.canvasWidth,
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height: cropper.canvasHeight,
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cutY: cropper.cutY,
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cutX: cropper.cutX,
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x: currentX,
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y: currentY,
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corner: 4
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};
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}
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}
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function cutTouchMove(e, ins) {
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if (!cropper.CUT_START || cropper.CUT_START === 'null') return;
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if (cropper.flagCutTouch) {
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var touch = e.touches || e.changedTouches;
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var res = e.instance.getDataset();
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var lockRatio = bool(res.lockratio);
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var lockWidth = bool(res.lockwidth);
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var lockHeight = bool(res.lockheight);
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if (lockRatio && (lockWidth || lockHeight)) return;
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var width = cropper.canvasWidth,
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height = cropper.canvasHeight,
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cutY = cropper.cutY,
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cutX = cropper.cutX;
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var size_correct = function() {
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width = width <= cropper.maxWidth ? (width >= cropper.minWidth ? width : cropper.minWidth) : cropper.maxWidth;
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height = height <= cropper.maxHeight ? (height >= cropper.minHeight ? height : cropper.minHeight) : cropper.maxHeight;
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}
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var size_inspect = function() {
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if ((width > cropper.maxWidth || width < cropper.minWidth || height > cropper.maxHeight || height < cropper.minHeight) &&
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lockRatio) {
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size_correct();
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return false;
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} else {
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size_correct();
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return true;
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}
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};
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height = cropper.CUT_START.height + (cropper.CUT_START.corner > 1 && cropper.CUT_START.corner < 4 ? 1 : -1) * (
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cropper.CUT_START.y - touch[0].pageY);
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switch (cropper.CUT_START.corner) {
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case 1:
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width = cropper.CUT_START.width - cropper.CUT_START.x + touch[0].pageX;
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if (lockRatio) {
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height = width / (cropper.canvasWidth / cropper.canvasHeight);
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}
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if (!size_inspect()) return;
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break;
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case 2:
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width = cropper.CUT_START.width - cropper.CUT_START.x + touch[0].pageX;
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if (lockRatio) {
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height = width / (cropper.canvasWidth / cropper.canvasHeight);
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}
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if (!size_inspect()) return;
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cutY = cropper.CUT_START.cutY - (height - cropper.CUT_START.height);
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break;
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case 3:
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width = cropper.CUT_START.width + cropper.CUT_START.x - touch[0].pageX;
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if (lockRatio) {
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height = width / (cropper.canvasWidth / cropper.canvasHeight);
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}
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if (!size_inspect()) return;
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cutY = cropper.CUT_START.cutY - (height - cropper.CUT_START.height);
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cutX = cropper.CUT_START.cutX - (width - cropper.CUT_START.width);
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break;
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case 4:
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width = cropper.CUT_START.width + cropper.CUT_START.x - touch[0].pageX;
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if (lockRatio) {
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height = width / (cropper.canvasWidth / cropper.canvasHeight);
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}
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if (!size_inspect()) return;
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cutX = cropper.CUT_START.cutX - (width - cropper.CUT_START.width);
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break;
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default:
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break;
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}
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if (!lockWidth && !lockHeight) {
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cropper.canvasWidth = width;
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cropper.cutX = cutX;
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cropper.canvasHeight = height;
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cropper.cutY = cutY;
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canvasHeight(ins);
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canvasWidth(ins);
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} else if (!lockWidth) {
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cropper.canvasWidth = width;
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cropper.cutX = cutX;
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canvasWidth(ins);
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} else if (!lockHeight) {
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cropper.canvasHeight = height;
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cropper.cutY = cutY;
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canvasHeight(ins);
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}
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styleUpdate(ins)
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imgMarginDetectionScale(ins);
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}
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}
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//检测剪裁框位置是否在允许的范围内(屏幕内)
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function cutDetectionPosition(ins) {
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var windowHeight = cropper.windowHeight,
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windowWidth = cropper.windowWidth;
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var cutDetectionPositionTop = function() {
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//检测上边距是否在范围内
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if (cropper.cutY < 0) {
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cropper.cutY = 0;
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}
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if (cropper.cutY > windowHeight - cropper.canvasHeight) {
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cropper.cutY = windowHeight - cropper.canvasHeight;
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}
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}
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var cutDetectionPositionLeft = function() {
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//检测左边距是否在范围内
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if (cropper.cutX < 0) {
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cropper.cutX = 0;
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}
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if (cropper.cutX > windowWidth - cropper.canvasWidth) {
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cropper.cutX = windowWidth - cropper.canvasWidth;
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}
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}
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//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）
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if (cropper.cutY == null && cropper.cutX == null) {
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var cutY = (windowHeight - cropper.canvasHeight) * 0.5;
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var cutX = (windowWidth - cropper.canvasWidth) * 0.5;
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cropper.cutY = cutY; //截取的框上边距
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cropper.cutX = cutX; //截取的框左边距
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} else if (cropper.cutY != null && cropper.cutX != null) {
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cutDetectionPositionTop();
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cutDetectionPositionLeft();
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} else if (cropper.cutY != null && cropper.cutX == null) {
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cutDetectionPositionTop();
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cropper.cutX = (windowWidth - cropper.canvasWidth) / 2;
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} else if (cropper.cutY == null && cropper.cutX != null) {
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cutDetectionPositionLeft();
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cropper.cutY = (windowHeight - cropper.canvasHeight) / 2;
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}
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styleUpdate(ins)
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}
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||||
/**
|
||||
* 图片边缘检测-缩放
|
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*/
|
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function imgMarginDetectionScale(ins, delay) {
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if (!cropper.limitMove) return;
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var scale = cropper.scale;
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var imgWidth = cropper.imgWidth;
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var imgHeight = cropper.imgHeight;
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if ((cropper.angle / 90) % 2) {
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imgWidth = cropper.imgHeight;
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imgHeight = cropper.imgWidth;
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}
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if (imgWidth * scale < cropper.canvasWidth) {
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scale = cropper.canvasWidth / imgWidth;
|
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}
|
||||
if (imgHeight * scale < cropper.canvasHeight) {
|
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scale = Math.max(scale, cropper.canvasHeight / imgHeight);
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}
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imgMarginDetectionPosition(ins, scale, delay);
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}
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||||
/**
|
||||
* 图片边缘检测-位置
|
||||
*/
|
||||
function imgMarginDetectionPosition(ins, scale, delay) {
|
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if (!cropper.limitMove) return;
|
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var left = cropper.imgLeft;
|
||||
var top = cropper.imgTop;
|
||||
scale = scale || cropper.scale;
|
||||
var imgWidth = cropper.imgWidth;
|
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var imgHeight = cropper.imgHeight;
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if ((cropper.angle / 90) % 2) {
|
||||
imgWidth = cropper.imgHeight;
|
||||
imgHeight = cropper.imgWidth;
|
||||
}
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left = cropper.cutX + (imgWidth * scale) / 2 >= left ? left : cropper.cutX + (imgWidth * scale) / 2;
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left = cropper.cutX + cropper.canvasWidth - (imgWidth * scale) / 2 <= left ? left : cropper.cutX + cropper.canvasWidth -
|
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(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;
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||||
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||||
cropper.imgLeft = left;
|
||||
cropper.imgTop = top;
|
||||
cropper.scale = scale;
|
||||
styleUpdate(ins)
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||||
if (!delay || delay === 'null') {
|
||||
imgTransform(ins);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
function cutTouchEnd(e, ins) {
|
||||
moveStop(ins);
|
||||
cropper.flagCutTouch = false;
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||||
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
|
||||
}
|
||||
Reference in New Issue
Block a user