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add scroll to top feature #1

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add scroll to top feature #1

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18 changes: 15 additions & 3 deletions SuperGridSectionList.js
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ class SuperGridSectionList extends Component {
}
}


onLayout(e) {
const { staticDimension, onLayout } = this.props;
if (!staticDimension) {
Expand All @@ -42,6 +42,17 @@ class SuperGridSectionList extends Component {
}
}

scrollToTop = () => {
if (this.refs.list) {
this.refs.list.scrollToLocation({
sectionIndex: 0,
itemIndex: 0,
viewPosition: 0,
animated: true,
});
}
}

getDimensions(lvDimension, itemDim) {
const { itemWidth, spacing, fixed, staticDimension } = this.props;
let itemDimension = itemDim || this.props.itemDimension;
Expand Down Expand Up @@ -111,12 +122,12 @@ class SuperGridSectionList extends Component {
const { itemsPerRow } = this.state;

//Deep copy, so that re-renders and chunkArray functions don't affect the actual items object
let sectionsCopy = cloneDeep(sections);
let sectionsCopy = cloneDeep(sections);

for (sectionsPair of sectionsCopy){

//Going through all the sections in sectionsCopy, and dividing their 'data' fields into smaller 'chunked' arrays to represent rows
const chunked = chunkArray(sectionsPair.data, itemsPerRow);
const chunked = chunkArray(sectionsPair.data, itemsPerRow);

//Now adding metadata to these rows
const rows = chunked.map((r, i) => {
Expand All @@ -131,6 +142,7 @@ class SuperGridSectionList extends Component {

return (
<SectionList
ref="list"
sections={sectionsCopy}
renderSectionHeader = {renderSectionHeader}
renderItem={this.renderHorizontalRow}
Expand Down