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import { VantComponent } from '../common/component'; |
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import { touch } from '../mixins/touch'; |
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import { range } from '../common/utils'; |
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const THRESHOLD = 0.3; |
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let ARRAY = []; |
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VantComponent({ |
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props: { |
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disabled: Boolean, |
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leftWidth: { |
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type: Number, |
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value: 0, |
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observer(leftWidth = 0) { |
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if (this.offset > 0) { |
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this.swipeMove(leftWidth); |
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} |
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}, |
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}, |
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rightWidth: { |
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type: Number, |
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value: 0, |
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observer(rightWidth = 0) { |
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if (this.offset < 0) { |
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this.swipeMove(-rightWidth); |
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} |
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}, |
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}, |
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asyncClose: Boolean, |
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name: { |
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type: null, |
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value: '', |
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}, |
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}, |
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mixins: [touch], |
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data: { |
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catchMove: false, |
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wrapperStyle: '', |
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}, |
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created() { |
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this.offset = 0; |
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ARRAY.push(this); |
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}, |
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destroyed() { |
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ARRAY = ARRAY.filter((item) => item !== this); |
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}, |
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methods: { |
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open(position) { |
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const { leftWidth, rightWidth } = this.data; |
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const offset = position === 'left' ? leftWidth : -rightWidth; |
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this.swipeMove(offset); |
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this.$emit('open', { |
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position, |
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name: this.data.name, |
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}); |
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}, |
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close() { |
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this.swipeMove(0); |
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}, |
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swipeMove(offset = 0) { |
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this.offset = range(offset, -this.data.rightWidth, this.data.leftWidth); |
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const transform = `translate3d(${this.offset}px, 0, 0)`; |
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const transition = this.dragging |
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? 'none' |
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: 'transform .6s cubic-bezier(0.18, 0.89, 0.32, 1)'; |
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this.setData({ |
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wrapperStyle: ` |
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-webkit-transform: ${transform}; |
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-webkit-transition: ${transition}; |
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transform: ${transform}; |
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transition: ${transition}; |
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`, |
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}); |
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}, |
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swipeLeaveTransition() { |
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const { leftWidth, rightWidth } = this.data; |
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const { offset } = this; |
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if (rightWidth > 0 && -offset > rightWidth * THRESHOLD) { |
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this.open('right'); |
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} else if (leftWidth > 0 && offset > leftWidth * THRESHOLD) { |
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this.open('left'); |
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} else { |
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this.swipeMove(0); |
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} |
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this.setData({ catchMove: false }); |
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}, |
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startDrag(event) { |
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if (this.data.disabled) { |
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return; |
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} |
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this.startOffset = this.offset; |
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this.touchStart(event); |
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}, |
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noop() {}, |
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onDrag(event) { |
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if (this.data.disabled) { |
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return; |
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} |
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this.touchMove(event); |
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if (this.direction !== 'horizontal') { |
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return; |
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} |
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this.dragging = true; |
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ARRAY.filter( |
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(item) => item !== this && item.offset !== 0 |
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).forEach((item) => item.close()); |
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this.setData({ catchMove: true }); |
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this.swipeMove(this.startOffset + this.deltaX); |
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}, |
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endDrag() { |
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if (this.data.disabled) { |
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return; |
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} |
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this.dragging = false; |
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this.swipeLeaveTransition(); |
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}, |
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onClick(event) { |
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const { key: position = 'outside' } = event.currentTarget.dataset; |
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this.$emit('click', position); |
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if (!this.offset) { |
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return; |
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} |
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if (this.data.asyncClose) { |
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this.$emit('close', { |
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position, |
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instance: this, |
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name: this.data.name, |
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}); |
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} else { |
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this.swipeMove(0); |
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} |
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}, |
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}, |
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}); |