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miniprogram_npm/@vant/weapp/slider/index.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var component_1 = require("../common/component");
+var touch_1 = require("../mixins/touch");
+var version_1 = require("../common/version");
+var utils_1 = require("../common/utils");
+var DRAG_STATUS = {
+    START: 'start',
+    MOVING: 'moving',
+    END: 'end',
+};
+(0, component_1.VantComponent)({
+    mixins: [touch_1.touch],
+    props: {
+        range: Boolean,
+        disabled: Boolean,
+        useButtonSlot: Boolean,
+        activeColor: String,
+        inactiveColor: String,
+        max: {
+            type: Number,
+            value: 100,
+        },
+        min: {
+            type: Number,
+            value: 0,
+        },
+        step: {
+            type: Number,
+            value: 1,
+        },
+        value: {
+            type: null,
+            value: 0,
+            observer: function (val) {
+                if (val !== this.value) {
+                    this.updateValue(val);
+                }
+            },
+        },
+        vertical: Boolean,
+        barHeight: null,
+    },
+    created: function () {
+        this.updateValue(this.data.value);
+    },
+    methods: {
+        onTouchStart: function (event) {
+            var _this = this;
+            if (this.data.disabled)
+                return;
+            var index = event.currentTarget.dataset.index;
+            if (typeof index === 'number') {
+                this.buttonIndex = index;
+            }
+            this.touchStart(event);
+            this.startValue = this.format(this.value);
+            this.newValue = this.value;
+            if (this.isRange(this.newValue)) {
+                this.startValue = this.newValue.map(function (val) { return _this.format(val); });
+            }
+            else {
+                this.startValue = this.format(this.newValue);
+            }
+            this.dragStatus = DRAG_STATUS.START;
+        },
+        onTouchMove: function (event) {
+            var _this = this;
+            if (this.data.disabled)
+                return;
+            if (this.dragStatus === DRAG_STATUS.START) {
+                this.$emit('drag-start');
+            }
+            this.touchMove(event);
+            this.dragStatus = DRAG_STATUS.MOVING;
+            (0, utils_1.getRect)(this, '.van-slider').then(function (rect) {
+                var vertical = _this.data.vertical;
+                var delta = vertical ? _this.deltaY : _this.deltaX;
+                var total = vertical ? rect.height : rect.width;
+                var diff = (delta / total) * _this.getRange();
+                if (_this.isRange(_this.startValue)) {
+                    _this.newValue[_this.buttonIndex] =
+                        _this.startValue[_this.buttonIndex] + diff;
+                }
+                else {
+                    _this.newValue = _this.startValue + diff;
+                }
+                _this.updateValue(_this.newValue, false, true);
+            });
+        },
+        onTouchEnd: function () {
+            var _this = this;
+            if (this.data.disabled)
+                return;
+            if (this.dragStatus === DRAG_STATUS.MOVING) {
+                this.dragStatus = DRAG_STATUS.END;
+                (0, utils_1.nextTick)(function () {
+                    _this.updateValue(_this.newValue, true);
+                    _this.$emit('drag-end');
+                });
+            }
+        },
+        onClick: function (event) {
+            var _this = this;
+            if (this.data.disabled)
+                return;
+            var min = this.data.min;
+            (0, utils_1.getRect)(this, '.van-slider').then(function (rect) {
+                var vertical = _this.data.vertical;
+                var touch = event.touches[0];
+                var delta = vertical
+                    ? touch.clientY - rect.top
+                    : touch.clientX - rect.left;
+                var total = vertical ? rect.height : rect.width;
+                var value = Number(min) + (delta / total) * _this.getRange();
+                if (_this.isRange(_this.value)) {
+                    var _a = _this.value, left = _a[0], right = _a[1];
+                    var middle = (left + right) / 2;
+                    if (value <= middle) {
+                        _this.updateValue([value, right], true);
+                    }
+                    else {
+                        _this.updateValue([left, value], true);
+                    }
+                }
+                else {
+                    _this.updateValue(value, true);
+                }
+            });
+        },
+        isRange: function (val) {
+            var range = this.data.range;
+            return range && Array.isArray(val);
+        },
+        handleOverlap: function (value) {
+            if (value[0] > value[1]) {
+                return value.slice(0).reverse();
+            }
+            return value;
+        },
+        updateValue: function (value, end, drag) {
+            var _this = this;
+            if (this.isRange(value)) {
+                value = this.handleOverlap(value).map(function (val) { return _this.format(val); });
+            }
+            else {
+                value = this.format(value);
+            }
+            this.value = value;
+            var vertical = this.data.vertical;
+            var mainAxis = vertical ? 'height' : 'width';
+            this.setData({
+                wrapperStyle: "\n          background: ".concat(this.data.inactiveColor || '', ";\n          ").concat(vertical ? 'width' : 'height', ": ").concat((0, utils_1.addUnit)(this.data.barHeight) || '', ";\n        "),
+                barStyle: "\n          ".concat(mainAxis, ": ").concat(this.calcMainAxis(), ";\n          left: ").concat(vertical ? 0 : this.calcOffset(), ";\n          top: ").concat(vertical ? this.calcOffset() : 0, ";\n          ").concat(drag ? 'transition: none;' : '', "\n        "),
+            });
+            if (drag) {
+                this.$emit('drag', { value: value });
+            }
+            if (end) {
+                this.$emit('change', value);
+            }
+            if ((drag || end) && (0, version_1.canIUseModel)()) {
+                this.setData({ value: value });
+            }
+        },
+        getScope: function () {
+            return Number(this.data.max) - Number(this.data.min);
+        },
+        getRange: function () {
+            var _a = this.data, max = _a.max, min = _a.min;
+            return max - min;
+        },
+        getOffsetWidth: function (current, min) {
+            var scope = this.getScope();
+            // 避免最小值小于最小step时出现负数情况
+            return "".concat(Math.max(((current - min) * 100) / scope, 0), "%");
+        },
+        // 计算选中条的长度百分比
+        calcMainAxis: function () {
+            var value = this.value;
+            var min = this.data.min;
+            if (this.isRange(value)) {
+                return this.getOffsetWidth(value[1], value[0]);
+            }
+            return this.getOffsetWidth(value, Number(min));
+        },
+        // 计算选中条的开始位置的偏移量
+        calcOffset: function () {
+            var value = this.value;
+            var min = this.data.min;
+            var scope = this.getScope();
+            if (this.isRange(value)) {
+                return "".concat(((value[0] - Number(min)) * 100) / scope, "%");
+            }
+            return '0%';
+        },
+        format: function (value) {
+            var min = +this.data.min;
+            var max = +this.data.max;
+            var step = +this.data.step;
+            value = (0, utils_1.clamp)(value, min, max);
+            var diff = Math.round((value - min) / step) * step;
+            return (0, utils_1.addNumber)(min, diff);
+        },
+    },
+});