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feat(timeline): swipe to refresh (close #547)
Signed-off-by: Varun Patil <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| <template> | ||
| <div @touchstart.passive="touchstart" @touchmove.passive="touchmove" @touchend.passive="touchend"> | ||
| <div v-if="on && progress" class="swipe-progress" :style="{ background: gradient }"></div> | ||
| <slot></slot> | ||
| </div> | ||
| </template> | ||
|
|
||
| <script lang="ts"> | ||
| import { defineComponent } from 'vue'; | ||
| const SWIPE_PX = 250; | ||
| export default defineComponent({ | ||
| name: 'SwipeRefresh', | ||
| props: { | ||
| allowSwipe: { | ||
| type: Boolean, | ||
| default: true, | ||
| }, | ||
| }, | ||
| emits: { | ||
| refresh: () => true, | ||
| }, | ||
| data: () => ({ | ||
| on: false, | ||
| start: 0, | ||
| end: 0, | ||
| updateFrame: 0, | ||
| progress: 0, | ||
| }), | ||
| computed: { | ||
| gradient() { | ||
| const start = 50 - this.progress / 2; | ||
| const end = 50 + this.progress / 2; | ||
| const out = 'transparent'; | ||
| const progress = 'var(--color-primary)'; | ||
| return `linear-gradient(to right, ${out} ${start}%, ${progress} ${start}%, ${progress} ${end}%, ${out} ${end}%)`; | ||
| }, | ||
| }, | ||
| methods: { | ||
| /** Start gesture on container (passive) */ | ||
| touchstart(event: TouchEvent) { | ||
| if (!this.allowSwipe) return; | ||
| const touch = event.touches[0]; | ||
| this.end = this.start = touch.clientY; | ||
| this.progress = 0; | ||
| this.on = true; | ||
| }, | ||
| /** Execute gesture on container (passive) */ | ||
| touchmove(event: TouchEvent) { | ||
| if (!this.allowSwipe) return; | ||
| const touch = event.touches[0]; | ||
| this.end = touch.clientY; | ||
| // Update progress only once per frame | ||
| this.updateFrame ||= requestAnimationFrame(() => { | ||
| this.updateFrame = 0; | ||
| // Compute percentage of swipe | ||
| const delta = (this.end - this.start) / SWIPE_PX; | ||
| this.progress = Math.min(Math.max(0, delta * 100), 100); | ||
| // Execute action on threshold | ||
| if (this.progress >= 100) { | ||
| this.on = false; | ||
| this.$emit('refresh'); | ||
| } | ||
| }); | ||
| }, | ||
| /** End gesture on container (passive) */ | ||
| touchend(event: TouchEvent) { | ||
| this.on = false; | ||
| }, | ||
| }, | ||
| }); | ||
| </script> | ||
|
|
||
| <style lang="scss" scoped> | ||
| .swipe-progress { | ||
| position: absolute; | ||
| z-index: 100; | ||
| top: 0; | ||
| width: 100%; | ||
| height: 3px; | ||
| html.native & { | ||
| top: 2px; | ||
| } | ||
| } | ||
| </style> |
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