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Now emits start/stop drag events #106

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141 changes: 82 additions & 59 deletions src/RangeSlider.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -4,12 +4,26 @@
v-bind:disabled="disabled"
@dragstart="dragStart"
@drag="drag"
@dragend="dragEnd">
@dragend="dragEnd"
>
<span ref="inner" class="range-slider-inner">
<input class="range-slider-hidden" type="text" :name="name" :value="actualValue" :disabled="disabled">
<input
class="range-slider-hidden"
type="text"
:name="name"
:value="actualValue"
:disabled="disabled"
/>
<span class="range-slider-rail"></span>
<span class="range-slider-fill" :style="{ width: valuePercent + '%' }"></span>
<span class="range-slider-knob" ref="knob" :style="{ left: valuePercent + '%' }">
<span
class="range-slider-fill"
:style="{ width: valuePercent + '%' }"
></span>
<span
class="range-slider-knob"
ref="knob"
:style="{ left: valuePercent + '%' }"
>
<slot name="knob"></slot>
</span>
</span>
Expand All @@ -20,132 +34,141 @@
<script>
// @flow

import DragHelper from './DragHelper'
import { round } from './utils'
import DragHelper from "./DragHelper";
import { round } from "./utils";

export default {
props: {
name: String,
value: [String, Number],
disabled: {
type: Boolean,
default: false
default: false,
},
min: {
type: [String, Number],
default: 0
default: 0,
},
max: {
type: [String, Number],
default: 100
default: 100,
},
step: {
type: [String, Number],
default: 1
}
default: 1,
},
},

data () {
data() {
return {
actualValue: null,
dragStartValue: null
}
dragStartValue: null,
};
},

created () {
const { _min: min, _max: max } = this
let defaultValue = Number(this.value)
created() {
const { _min: min, _max: max } = this;
let defaultValue = Number(this.value);

if (this.value == null || isNaN(defaultValue)) {
if (min > max) {
defaultValue = min
defaultValue = min;
} else {
defaultValue = (min + max) / 2
defaultValue = (min + max) / 2;
}
}

this.actualValue = this.round(defaultValue)
this.actualValue = this.round(defaultValue);
},

computed: {
_min () {
return Number(this.min)
_min() {
return Number(this.min);
},

_max () {
return Number(this.max)
_max() {
return Number(this.max);
},

_step () {
return Number(this.step)
_step() {
return Number(this.step);
},

valuePercent () {
return (this.actualValue - this._min) / (this._max - this._min) * 100
}
valuePercent() {
return ((this.actualValue - this._min) / (this._max - this._min)) * 100;
},
},

watch: {
value (newValue) {
const value = Number(newValue)
value(newValue) {
const value = Number(newValue);
if (newValue != null && !isNaN(value)) {
this.actualValue = this.round(value)
this.actualValue = this.round(value);
}
},
min () {
this.actualValue = this.round(this.actualValue)
min() {
this.actualValue = this.round(this.actualValue);
},
max() {
this.actualValue = this.round(this.actualValue);
},
max () {
this.actualValue = this.round(this.actualValue)
}
},

methods: {
dragStart (event: Event, offset: { left: number, top: number }) {
this.dragStartValue = this.actualValue
dragStart(event: Event, offset: { left: number, top: number }) {
this.dragStartValue = this.actualValue;
if (event.target === this.$refs.knob) {
return
return;
}

this.$emit("drag-start", this.dragStartValue);

// If the click is out of knob, move it to mouse position
this.drag(event, offset)
this.drag(event, offset);
},

drag (event: Event, offset: { left: number, top: number }) {
const { offsetWidth } = this.$refs.inner
this.actualValue = this.round(this.valueFromBounds(offset.left, offsetWidth))
this.emitInput(this.actualValue)
drag(event: Event, offset: { left: number, top: number }) {
const { offsetWidth } = this.$refs.inner;
this.actualValue = this.round(
this.valueFromBounds(offset.left, offsetWidth)
);
this.emitInput(this.actualValue);
},

dragEnd (event: Event, offset: { left: number, top: number }) {
const { offsetWidth } = this.$refs.inner
this.actualValue = this.round(this.valueFromBounds(offset.left, offsetWidth))
dragEnd(event: Event, offset: { left: number, top: number }) {
const { offsetWidth } = this.$refs.inner;
this.actualValue = this.round(
this.valueFromBounds(offset.left, offsetWidth)
);

if (this.dragStartValue !== this.actualValue) {
this.emitChange(this.actualValue)
this.emitChange(this.actualValue);
}

this.$emit("drag-end", this.actualValue);
},

emitInput(value) {
this.$emit('input', value)
this.$emit("input", value);
},

emitChange(value) {
this.$emit('change', value)
this.$emit("change", value);
},

valueFromBounds (point: number, width: number) {
return (point / width) * (this._max - this._min) + this._min
valueFromBounds(point: number, width: number) {
return (point / width) * (this._max - this._min) + this._min;
},

round (value: number): number {
return round(value, this._min, this._max, this._step)
}
round(value: number): number {
return round(value, this._min, this._max, this._step);
},
},

components: {
DragHelper
}
}
DragHelper,
},
};
</script>

<style lang="scss">
Expand Down