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@@ -0,0 +1,52 @@
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+// 鼠标移动滚动位置类
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+class Drag {
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+ constructor(vm) {
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+ this.dragWrap = vm;// 要挂载的容器
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+ this._dom = {};
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+ this._x = 0;
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+ this._y = 0;
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+ this._top = 0;
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+ this._left = 0;
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+ this.move = false;
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+ this.down = false;
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+ this.init.apply(this, arguments);
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+ }
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+
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+ // 绑定事件
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+ init() {
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+ this.bindEvent();
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+ }
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+
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+ // 给要素增加鼠标事件mousedown,mouseup,mousemove
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+ bindEvent() {
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+ var t = this;
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+ this.dragWrap.addEventListener('mousedown', function (e) {
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+ e && e.preventDefault();
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+ if (!t.move) {
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+ t.move = false;
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+ t.down = true;
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+ t._x = e.clientX;
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+ t._y = e.clientY;
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+ t._top = t.dragWrap.scrollTop;
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+ t._left = t.dragWrap.scrollLeft;
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+ }
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+ });
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+ this.dragWrap.addEventListener('mouseup', function (e) {
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+ e && e.preventDefault();
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+ t.move = false;
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+ t.down = false;
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+ });
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+ this.dragWrap.addEventListener('mousemove', function (e) {
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+ if (t.down) {
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+ e && e.preventDefault();
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+ t.move = true;
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+ let x = t._x - e.clientX;
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+ let y = t._y - e.clientY;
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+ t.dragWrap.scrollLeft = t._left + x;
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+ t.dragWrap.scrollTop = t._top + y;
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+ }
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+ });
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+ }
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+}
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+export default Drag;
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+
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