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feat(dnd): implement callback on initializing drag or resize action (j…
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…quense#1206)

Addresses jquense#1205 

This PR would add an optional prop from the withDragAndDrop addon, that would allow users to pass a onDragStart callback to the DragAndDrop calendar, which gets called with `{ event, action, direction }` as its sole parameter.

The change is minimal, meant to serve users who need the hook and otherwise get out of the way. Open to any feedback!
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kamry-bowman authored and jquense committed Apr 18, 2019
1 parent 475674c commit 0fa2c30
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Showing 2 changed files with 8 additions and 1 deletion.
1 change: 1 addition & 0 deletions examples/demos/dnd.js
Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@ class Dnd extends React.Component {
resizable
onEventResize={this.resizeEvent}
onSelectSlot={this.newEvent}
onDragStart={console.log}
defaultView={BigCalendar.Views.MONTH}
defaultDate={new Date(2015, 3, 12)}
/>
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8 changes: 7 additions & 1 deletion src/addons/dragAndDrop/withDragAndDrop.js
Original file line number Diff line number Diff line change
Expand Up @@ -23,12 +23,13 @@ import { mergeComponents } from './common'
*
* Set `resizable` to true in your calendar if you want events to be resizable.
*
* The HOC adds `onEventDrop` and `onEventResize` callback properties if the events are
* The HOC adds `onEventDrop`, `onEventResize`, `onDragStart` callback properties if the events are
* moved or resized. They are called with these signatures:
*
* ```js
* function onEventDrop({ event, start, end, allDay }) {...}
* function onEventResize(type, { event, start, end, allDay }) {...} // type is always 'drop'
* function onDragStart({ event, action, direction }) {...}
* ```
*
* Moving and resizing of events has some subtlety which one should be aware of.
Expand All @@ -53,6 +54,7 @@ export default function withDragAndDrop(Calendar) {
static propTypes = {
onEventDrop: PropTypes.func,
onEventResize: PropTypes.func,
onDragStart: PropTypes.func,

draggableAccessor: accessor,
resizableAccessor: accessor,
Expand Down Expand Up @@ -114,7 +116,11 @@ export default function withDragAndDrop(Calendar) {
}

handleBeginAction = (event, action, direction) => {
const { onDragStart } = this.props
this.setState({ event, action, direction })
if (onDragStart) {
onDragStart({ event, action, direction })
}
}

handleInteractionStart = () => {
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