治好强迫症
viyiviyi
parent
b3e02bd6fa
commit
0febff489f
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@ -6,12 +6,10 @@ onUiLoaded(function () {
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function disableClose(e) {
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e.stopPropagation();
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}
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let toolDomHeight = 0;
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let modalControls = imageContainer.getElementsByClassName("modalControls")[0];
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if (modalControls) {
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modalControls.style.position = "relative";
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modalControls.style.zIndex = 1;
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toolDomHeight = modalControls.offsetHeight;
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}
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let img = imageContainer.querySelector("img");
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img.style.width = "auto";
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@ -41,18 +39,23 @@ onUiLoaded(function () {
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scale = Math.max(0.1, scale);
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// 图片中心坐标
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let centerX = imageContainer.offsetWidth / 2;
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let centerY = (imageContainer.offsetHeight - toolDomHeight) / 2;
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let centerY = imageContainer.offsetHeight / 2;
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// 图片中心坐标
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let imgCenterX = offsetX + centerX;
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let imgCenterY = offsetY + centerY;
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// 缩放后坐标偏移 = 缩放后图片中心坐标 - 页面中心坐标
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// 缩放后图片中心坐标 = 缩放中心坐标 - 缩放后距离
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// 缩放后距离 = (缩放前距离 / 之前的缩放比) *之后的缩放比
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// 缩放前距离 = 缩放中心坐标 - 之前的图片中心坐标
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// 之前的图片中心坐标 = 页面中心坐标 + 坐标偏移
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offsetX =
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offsetX -
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((event.pageX - (offsetX + centerX)) / lastScale) * (scale - lastScale);
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event.clientX -
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((event.clientX - imgCenterX) / lastScale) * scale -
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centerX;
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offsetY =
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offsetY -
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((event.pageY - (offsetY + centerY)) / lastScale) * (scale - lastScale);
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// 计算缩放后的图片中心偏移
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offsetX = Math.min(centerX, Math.max(-centerX, offsetX));
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offsetY = Math.min(centerY, Math.max(-centerY, offsetY));
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event.clientY -
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((event.clientY - imgCenterY) / lastScale) * scale -
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centerY;
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img.style.transform =
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"translate(" + offsetX + "px, " + offsetY + "px) scale(" + scale + ")";
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},
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@ -121,15 +124,15 @@ onUiLoaded(function () {
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touchstart: function (event) {
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event.stopPropagation();
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if (!touchStore.tpuchScale) {
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lastX = event.targetTouches[0].pageX - offsetX;
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lastY = event.targetTouches[0].pageY - offsetY;
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lastX = event.targetTouches[0].clientX - offsetX;
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lastY = event.targetTouches[0].clientY - offsetY;
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}
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if (event.targetTouches[1]) {
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touchStore.tpuchScale = true;
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touchStore.last1X = event.targetTouches[0].pageX;
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touchStore.last1Y = event.targetTouches[0].pageY;
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touchStore.last2X = event.targetTouches[1].pageX;
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touchStore.last2Y = event.targetTouches[1].pageY;
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touchStore.last1X = event.targetTouches[0].clientX;
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touchStore.last1Y = event.targetTouches[0].clientY;
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touchStore.last2X = event.targetTouches[1].clientX;
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touchStore.last2Y = event.targetTouches[1].clientY;
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touchStore.scale = scale;
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lastLen = Math.sqrt(
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Math.pow(touchStore.last2X - touchStore.last1X, 2) +
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@ -142,20 +145,18 @@ onUiLoaded(function () {
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event.preventDefault();
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img.onclick = disableClose;
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if (event.targetTouches[1]) {
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function moveFun() {
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if (Date.now() - moveFunLastExecTime < 5) return;
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img.style.transition = "transform 0.3s ease";
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touchStore.delta1X = event.targetTouches[0].pageX;
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touchStore.delta1Y = event.targetTouches[0].pageY;
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touchStore.delta2X = event.targetTouches[1].pageX;
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touchStore.delta2Y = event.targetTouches[1].pageY;
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touchStore.delta1X = event.targetTouches[0].clientX;
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touchStore.delta1Y = event.targetTouches[0].clientY;
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touchStore.delta2X = event.targetTouches[1].clientX;
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touchStore.delta2Y = event.targetTouches[1].clientY;
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let centerX = imageContainer.offsetWidth / 2;
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let centerY = (imageContainer.offsetHeight - toolDomHeight) / 2;
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let centerY = imageContainer.offsetHeight / 2;
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let deltaLen = Math.sqrt(
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Math.pow(touchStore.delta2X - touchStore.delta1X, 2) +
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Math.pow(touchStore.delta2Y - touchStore.delta1Y, 2)
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);
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let zoom = deltaLen / lastLen;
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let lastScale = scale;
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scale = touchStore.scale * zoom;
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scale = Math.max(0.1, scale);
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// 当前缩放中心坐标
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@ -163,9 +164,21 @@ onUiLoaded(function () {
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touchStore.delta1X + (touchStore.delta2X - touchStore.delta1X) / 2;
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let deltaCenterY =
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touchStore.delta1Y + (touchStore.delta2Y - touchStore.delta1Y) / 2;
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// // 计算缩放后的图片中心偏移
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offsetX = Math.min(centerX, Math.max(-centerX, deltaCenterX - lastX));
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offsetY = Math.min(centerY, Math.max(-centerY, deltaCenterY - lastY));
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// 图片中心坐标
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let imgCenterX = offsetX + centerX;
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let imgCenterY = offsetY + centerY;
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// 计算缩放后的图片中心偏移
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offsetX =
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deltaCenterX -
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((deltaCenterX - imgCenterX) / lastScale) * scale -
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centerX;
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offsetY =
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deltaCenterY -
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((deltaCenterY - imgCenterY) / lastScale) * scale -
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centerY;
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function moveFun() {
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if (Date.now() - moveFunLastExecTime < 5) return;
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img.style.transition = "transform 0.3s ease";
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img.style.transform =
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"translate(" +
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offsetX +
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@ -186,8 +199,8 @@ onUiLoaded(function () {
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}
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} else if (!touchStore.tpuchScale) {
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img.style.transition = "";
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offsetX = event.targetTouches[0].pageX - lastX;
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offsetY = event.targetTouches[0].pageY - lastY;
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offsetX = event.targetTouches[0].clientX - lastX;
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offsetY = event.targetTouches[0].clientY - lastY;
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img.style.transform =
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"translate(" +
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offsetX +
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