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add onDragWillStart feature #85

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add onDragWillStart feature #85

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17 changes: 12 additions & 5 deletions src/draggable-grid.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ export interface IDraggableGridProps<DataType extends IBaseItemType> {
dragStartAnimation?: StyleProp<any>
onItemPress?: (item: DataType) => void
onDragStart?: (item: DataType) => void
onDragWillStart?: () => void
onDragging?: (gestureState: PanResponderGestureState) => void
onDragRelease?: (newSortedData: DataType[]) => void
onResetSort?: (newSortedData: DataType[]) => void
Expand Down Expand Up @@ -247,11 +248,17 @@ export const DraggableGrid = function<DataType extends IBaseItemType>(
const yDistance = startOffset.y + activeBlockOffset.y - endOffset.y
return Math.sqrt(Math.pow(xDistance, 2) + Math.pow(yDistance, 2))
}
function setActiveBlock(itemIndex: number, item: DataType) {
if (item.disabledDrag) return

setPanResponderCapture(true)
setActiveItemIndex(itemIndex)
function setActiveBlock(itemIndex: number, item: YourItemType): void {
if (item.disabledDrag) return;

setPanResponderCapture(true);

if (props.onDragWillStart) {
props.onDragWillStart();
}

setActiveItemIndex(itemIndex);

}
function startDragStartAnimation() {
if (!props.dragStartAnimation) {
Expand Down