[DTRA] Maryia/feat: vertical scroll behavior updates for isVerticalScrollEnabled functionality when disabled #1628
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src/store/ChartAdapterStore.ts
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| top: this.touchValues.deltaYTotal, | ||
| behavior: 'smooth', | ||
| }); | ||
| this.scrollChartParentOnTouchTimer = undefined; |
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Inside of timeout timer can be cleared only by undefined assignment or this will work too:
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we don't want to clear the timer inside it because it has already been executed, it won't be needed.
the purpose of this.scrollChartParentOnTouchTimer = undefined; (id removal) is to ensure that we initiate the next setTimeout execution only after the current one has finished execution (not let the if condition be satisfied).
src/store/ChartAdapterStore.ts
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| top: screenY - Number(this.touchValues.yOnTouchEnd ?? this.touchValues.y), | ||
| const isForcedScrollArea = x < nonScrollableAreaWidth; | ||
| const shouldForceMaxScroll = | ||
| Math.abs(Number(this.touchValues.deltaYTotal)) > 10 && e.type === 'touchend'; |
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Sometimes we get touchcancel instead of touchend, do we need to handle this case too?
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no, we don't need to do that. also, we won't get touchcancel here ever because we don't trigger onTouch action for this event type.
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src/store/ChartAdapterStore.ts
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| Math.abs(Number(this.touchValues.deltaYTotal)) > 10 && e.type === 'touchend'; | ||
| const stopChartPagination = () => { | ||
| // calling _scrollAnimationController.stop() in flutter-chart, value 1 doesn't affect the scale: | ||
| this.flutterChart?.app.scale(1); |
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this triggers the following method in flutter-chart which allows to stop chart pagination when we are scrolling:
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Preview Link: https://pr-1628-dtra-flutt.smartcharts-preview.pages.dev
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🎉 This PR is included in version 2.5.0 🎉 The release is available on: Your semantic-release bot 📦🚀 |
Dtrader V2 changes for
isVerticalScrollEnabled===false:With
isVerticalScrollEnabled={false}, the chart scroll behavior will be now as follows:toggleXScrollBlockmethod that has been added to theflutter-chartcontroller.Deriv-app PR: binary-com/deriv-app#16434
Flutter-chart PR: https://github.com/regentmarkets/flutter-chart/pull/327/