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DnD support for custom event components (#716)
* mostly new DnD implementation * comment/docs * use native storybook actions * Preserve dates on non-allDay DnD, improve docs * added alert() in resize example
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Eric Hahn
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Mar 19, 2018
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,51 +1,166 @@ | ||
| import PropTypes from 'prop-types' | ||
| import React from 'react' | ||
| import { DragSource } from 'react-dnd' | ||
| import { getEmptyImage } from 'react-dnd-html5-backend' | ||
| import cn from 'classnames' | ||
| import compose from './compose' | ||
|
|
||
| import BigCalendar from '../../index' | ||
| const EventWrapper = BigCalendar.components.eventWrapper | ||
|
|
||
| /* drag sources */ | ||
| class DraggableEventWrapper extends React.Component { | ||
| static propTypes = { | ||
| event: PropTypes.object.isRequired, | ||
|
|
||
| let eventSource = { | ||
| beginDrag(props) { | ||
| return props.event | ||
| }, | ||
| } | ||
| connectDragSource: PropTypes.func.isRequired, | ||
| connectTopDragPreview: PropTypes.func.isRequired, | ||
| connectTopDragSource: PropTypes.func.isRequired, | ||
| connectBottomDragPreview: PropTypes.func.isRequired, | ||
| connectBottomDragSource: PropTypes.func.isRequired, | ||
| connectLeftDragPreview: PropTypes.func.isRequired, | ||
| connectLeftDragSource: PropTypes.func.isRequired, | ||
| connectRightDragPreview: PropTypes.func.isRequired, | ||
| connectRightDragSource: PropTypes.func.isRequired, | ||
|
|
||
| function collectSource(connect, monitor) { | ||
| return { | ||
| connectDragSource: connect.dragSource(), | ||
| isDragging: monitor.isDragging(), | ||
| allDay: PropTypes.bool, | ||
| isRow: PropTypes.bool, | ||
| continuesPrior: PropTypes.bool, | ||
| continuesAfter: PropTypes.bool, | ||
| isDragging: PropTypes.bool, | ||
| isResizing: PropTypes.bool, | ||
| } | ||
| } | ||
|
|
||
| const propTypes = { | ||
| connectDragSource: PropTypes.func.isRequired, | ||
| isDragging: PropTypes.bool.isRequired, | ||
| event: PropTypes.object.isRequired, | ||
| } | ||
| componentDidMount() { | ||
| // this is needed to prevent the backend from | ||
| // screenshot'ing the event during a resize which | ||
| // would be very confusing visually | ||
| const emptyImage = getEmptyImage() | ||
| const previewOptions = { captureDraggingState: true } | ||
| this.props.connectTopDragPreview(emptyImage, previewOptions) | ||
| this.props.connectBottomDragPreview(emptyImage, previewOptions) | ||
| this.props.connectLeftDragPreview(emptyImage, previewOptions) | ||
| this.props.connectRightDragPreview(emptyImage, previewOptions) | ||
| } | ||
|
|
||
| class DraggableEventWrapper extends React.Component { | ||
| render() { | ||
| let { connectDragSource, isDragging, children, event } = this.props | ||
| let EventWrapper = BigCalendar.components.eventWrapper | ||
| let { | ||
| connectDragSource, | ||
| connectTopDragSource, | ||
| connectBottomDragSource, | ||
| connectLeftDragSource, | ||
| connectRightDragSource, | ||
| isDragging, | ||
| isResizing, | ||
| children, | ||
| event, | ||
| allDay, | ||
| isRow, | ||
| continuesPrior, | ||
| continuesAfter, | ||
| } = this.props | ||
|
|
||
| let StartAnchor = null, | ||
| EndAnchor = null | ||
|
|
||
| /* | ||
| * The resizability of events depends on whether they are | ||
| * allDay events and how they are displayed. | ||
| * | ||
| * 1. If the event is being shown in an event row (because | ||
| * it is an allDay event shown in the header row or because as | ||
| * in month view the view is showing all events as rows) then we | ||
| * allow east-west resizing. | ||
| * | ||
| * 2. Otherwise the event is being displayed | ||
| * normally, we can drag it north-south to resize the times. | ||
| * | ||
| * See `DropWrappers` for handling of the drop of such events. | ||
| * | ||
| * Notwithstanding the above, we never show drag anchors for | ||
| * events which continue beyond current component. This happens | ||
| * in the middle of events when showMultiDay is true, and to | ||
| * events at the edges of the calendar's min/max location. | ||
| */ | ||
| if (isRow || allDay) { | ||
| const anchor = ( | ||
| <div className="rbc-addons-dnd-resize-ew-anchor"> | ||
| <div className="rbc-addons-dnd-resize-ew-icon" /> | ||
| </div> | ||
| ) | ||
| StartAnchor = !continuesPrior && connectLeftDragSource(anchor) | ||
| EndAnchor = !continuesAfter && connectRightDragSource(anchor) | ||
| } else { | ||
| const anchor = ( | ||
| <div className="rbc-addons-dnd-resize-ns-anchor"> | ||
| <div className="rbc-addons-dnd-resize-ns-icon" /> | ||
| </div> | ||
| ) | ||
| StartAnchor = !continuesPrior && connectTopDragSource(anchor) | ||
| EndAnchor = !continuesAfter && connectBottomDragSource(anchor) | ||
| } | ||
|
|
||
| /* | ||
| * props.children is the singular <Event> component. | ||
| * BigCalendar positions the Event abolutely and we | ||
| * need the anchors to be part of that positioning. | ||
| * So we insert the anchors inside the Event's children | ||
| * rather than wrap the Event here as the latter approach | ||
| * would lose the positioning. | ||
| */ | ||
| const childrenWithAnchors = ( | ||
| <div className="rbc-addons-dnd-resizable"> | ||
| {StartAnchor} | ||
| {children.props.children} | ||
| {EndAnchor} | ||
| </div> | ||
| ) | ||
|
|
||
| children = React.cloneElement(children, { | ||
| className: cn( | ||
| children.props.className, | ||
| isDragging && 'rbc-addons-dnd-dragging' | ||
| isDragging && 'rbc-addons-dnd-dragging', | ||
| isResizing && 'rbc-addons-dnd-resizing' | ||
| ), | ||
| children: childrenWithAnchors, // replace original event child with anchor-embellished child | ||
| }) | ||
|
|
||
| return ( | ||
| <EventWrapper event={event}>{connectDragSource(children)}</EventWrapper> | ||
| <EventWrapper event={event} allDay={allDay}> | ||
| {connectDragSource(children)} | ||
| </EventWrapper> | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| DraggableEventWrapper.propTypes = propTypes | ||
| /* drag sources */ | ||
| const makeEventSource = anchor => ({ | ||
| beginDrag: ({ event }) => ({ event, anchor }), | ||
| // canDrag: ({ event }) => event.draggable === undefined || event.draggable - e.g. support per-event dragability/sizability | ||
| }) | ||
|
|
||
| export default DragSource('event', eventSource, collectSource)( | ||
| DraggableEventWrapper | ||
| ) | ||
| export default compose( | ||
| DragSource('event', makeEventSource('drop'), (connect, monitor) => ({ | ||
| connectDragSource: connect.dragSource(), | ||
| isDragging: monitor.isDragging(), | ||
| })), | ||
| DragSource('event', makeEventSource('resizeTop'), (connect, monitor) => ({ | ||
| connectTopDragSource: connect.dragSource(), | ||
| connectTopDragPreview: connect.dragPreview(), | ||
| isResizing: monitor.isDragging(), | ||
| })), | ||
| DragSource('event', makeEventSource('resizeBottom'), (connect, monitor) => ({ | ||
| connectBottomDragSource: connect.dragSource(), | ||
| connectBottomDragPreview: connect.dragPreview(), | ||
| isResizing: monitor.isDragging(), | ||
| })), | ||
| DragSource('event', makeEventSource('resizeLeft'), (connect, monitor) => ({ | ||
| connectLeftDragSource: connect.dragSource(), | ||
| connectLeftDragPreview: connect.dragPreview(), | ||
| isResizing: monitor.isDragging(), | ||
| })), | ||
| DragSource('event', makeEventSource('resizeRight'), (connect, monitor) => ({ | ||
| connectRightDragSource: connect.dragSource(), | ||
| connectRightDragPreview: connect.dragPreview(), | ||
| isResizing: monitor.isDragging(), | ||
| })) | ||
| )(DraggableEventWrapper) |
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