@swimlane/ngx-datatable
Version:
ngx-datatable is an Angular table grid component for presenting large and complex data.
131 lines • 16.7 kB
JavaScript
import { Directive, Output, EventEmitter, ContentChildren, KeyValueDiffers, Inject } from '@angular/core';
import { DraggableDirective } from './draggable.directive';
import { DOCUMENT } from '@angular/common';
export class OrderableDirective {
constructor(differs, document) {
this.document = document;
this.reorder = new EventEmitter();
this.targetChanged = new EventEmitter();
this.differ = differs.find({}).create();
}
ngAfterContentInit() {
// HACK: Investigate Better Way
this.updateSubscriptions();
this.draggables.changes.subscribe(this.updateSubscriptions.bind(this));
}
ngOnDestroy() {
this.draggables.forEach(d => {
d.dragStart.unsubscribe();
d.dragging.unsubscribe();
d.dragEnd.unsubscribe();
});
}
updateSubscriptions() {
const diffs = this.differ.diff(this.createMapDiffs());
if (diffs) {
const subscribe = ({ currentValue, previousValue }) => {
unsubscribe({ previousValue });
if (currentValue) {
currentValue.dragStart.subscribe(this.onDragStart.bind(this));
currentValue.dragging.subscribe(this.onDragging.bind(this));
currentValue.dragEnd.subscribe(this.onDragEnd.bind(this));
}
};
const unsubscribe = ({ previousValue }) => {
if (previousValue) {
previousValue.dragStart.unsubscribe();
previousValue.dragging.unsubscribe();
previousValue.dragEnd.unsubscribe();
}
};
diffs.forEachAddedItem(subscribe);
// diffs.forEachChangedItem(subscribe.bind(this));
diffs.forEachRemovedItem(unsubscribe);
}
}
onDragStart() {
this.positions = {};
let i = 0;
for (const dragger of this.draggables.toArray()) {
const elm = dragger.element;
const left = parseInt(elm.offsetLeft.toString(), 0);
this.positions[dragger.dragModel.prop] = {
left,
right: left + parseInt(elm.offsetWidth.toString(), 0),
index: i++,
element: elm
};
}
}
onDragging({ element, model, event }) {
const prevPos = this.positions[model.prop];
const target = this.isTarget(model, event);
if (target) {
if (this.lastDraggingIndex !== target.i) {
this.targetChanged.emit({
prevIndex: this.lastDraggingIndex,
newIndex: target.i,
initialIndex: prevPos.index
});
this.lastDraggingIndex = target.i;
}
}
else if (this.lastDraggingIndex !== prevPos.index) {
this.targetChanged.emit({
prevIndex: this.lastDraggingIndex,
initialIndex: prevPos.index
});
this.lastDraggingIndex = prevPos.index;
}
}
onDragEnd({ element, model, event }) {
const prevPos = this.positions[model.prop];
const target = this.isTarget(model, event);
if (target) {
this.reorder.emit({
prevIndex: prevPos.index,
newIndex: target.i,
model
});
}
this.lastDraggingIndex = undefined;
element.style.left = 'auto';
}
isTarget(model, event) {
let i = 0;
const x = event.x || event.clientX;
const y = event.y || event.clientY;
const targets = this.document.elementsFromPoint(x, y);
for (const prop in this.positions) {
// current column position which throws event.
const pos = this.positions[prop];
// since we drag the inner span, we need to find it in the elements at the cursor
if (model.prop !== prop && targets.find((el) => el === pos.element)) {
return {
pos,
i
};
}
i++;
}
}
createMapDiffs() {
return this.draggables.toArray().reduce((acc, curr) => {
acc[curr.dragModel.$$id] = curr;
return acc;
}, {});
}
}
OrderableDirective.decorators = [
{ type: Directive, args: [{ selector: '[orderable]' },] }
];
OrderableDirective.ctorParameters = () => [
{ type: KeyValueDiffers },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
OrderableDirective.propDecorators = {
reorder: [{ type: Output }],
targetChanged: [{ type: Output }],
draggables: [{ type: ContentChildren, args: [DraggableDirective, { descendants: true },] }]
};
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{\n  Directive,\n  Output,\n  EventEmitter,\n  ContentChildren,\n  QueryList,\n  KeyValueDiffers,\n  AfterContentInit,\n  OnDestroy,\n  Inject\n} from '@angular/core';\nimport { DraggableDirective } from './draggable.directive';\nimport { DOCUMENT } from '@angular/common';\n\n@Directive({ selector: '[orderable]' })\nexport class OrderableDirective implements AfterContentInit, OnDestroy {\n  @Output() reorder: EventEmitter<any> = new EventEmitter();\n  @Output() targetChanged: EventEmitter<any> = new EventEmitter();\n\n  @ContentChildren(DraggableDirective, { descendants: true })\n  draggables: QueryList<DraggableDirective>;\n\n  positions: any;\n  differ: any;\n  lastDraggingIndex: number;\n\n  constructor(differs: KeyValueDiffers, @Inject(DOCUMENT) private document: any) {\n    this.differ = differs.find({}).create();\n  }\n\n  ngAfterContentInit(): void {\n    // HACK: Investigate Better Way\n    this.updateSubscriptions();\n    this.draggables.changes.subscribe(this.updateSubscriptions.bind(this));\n  }\n\n  ngOnDestroy(): void {\n    this.draggables.forEach(d => {\n      d.dragStart.unsubscribe();\n      d.dragging.unsubscribe();\n      d.dragEnd.unsubscribe();\n    });\n  }\n\n  updateSubscriptions(): void {\n    const diffs = this.differ.diff(this.createMapDiffs());\n\n    if (diffs) {\n      const subscribe = ({ currentValue, previousValue }: any) => {\n        unsubscribe({ previousValue });\n\n        if (currentValue) {\n          currentValue.dragStart.subscribe(this.onDragStart.bind(this));\n          currentValue.dragging.subscribe(this.onDragging.bind(this));\n          currentValue.dragEnd.subscribe(this.onDragEnd.bind(this));\n        }\n      };\n\n      const unsubscribe = ({ previousValue }: any) => {\n        if (previousValue) {\n          previousValue.dragStart.unsubscribe();\n          previousValue.dragging.unsubscribe();\n          previousValue.dragEnd.unsubscribe();\n        }\n      };\n\n      diffs.forEachAddedItem(subscribe);\n      // diffs.forEachChangedItem(subscribe.bind(this));\n      diffs.forEachRemovedItem(unsubscribe);\n    }\n  }\n\n  onDragStart(): void {\n    this.positions = {};\n\n    let i = 0;\n    for (const dragger of this.draggables.toArray()) {\n      const elm = dragger.element;\n      const left = parseInt(elm.offsetLeft.toString(), 0);\n      this.positions[dragger.dragModel.prop] = {\n        left,\n        right: left + parseInt(elm.offsetWidth.toString(), 0),\n        index: i++,\n        element: elm\n      };\n    }\n  }\n\n  onDragging({ element, model, event }: any): void {\n    const prevPos = this.positions[model.prop];\n    const target = this.isTarget(model, event);\n\n    if (target) {\n      if (this.lastDraggingIndex !== target.i) {\n        this.targetChanged.emit({\n          prevIndex: this.lastDraggingIndex,\n          newIndex: target.i,\n          initialIndex: prevPos.index\n        });\n        this.lastDraggingIndex = target.i;\n      }\n    } else if (this.lastDraggingIndex !== prevPos.index) {\n      this.targetChanged.emit({\n        prevIndex: this.lastDraggingIndex,\n        initialIndex: prevPos.index\n      });\n      this.lastDraggingIndex = prevPos.index;\n    }\n  }\n\n  onDragEnd({ element, model, event }: any): void {\n    const prevPos = this.positions[model.prop];\n\n    const target = this.isTarget(model, event);\n    if (target) {\n      this.reorder.emit({\n        prevIndex: prevPos.index,\n        newIndex: target.i,\n        model\n      });\n    }\n\n    this.lastDraggingIndex = undefined;\n    element.style.left = 'auto';\n  }\n\n  isTarget(model: any, event: any): any {\n    let i = 0;\n    const x = event.x || event.clientX;\n    const y = event.y || event.clientY;\n    const targets = this.document.elementsFromPoint(x, y);\n\n    for (const prop in this.positions) {\n      // current column position which throws event.\n      const pos = this.positions[prop];\n\n      // since we drag the inner span, we need to find it in the elements at the cursor\n      if (model.prop !== prop && targets.find((el: any) => el === pos.element)) {\n        return {\n          pos,\n          i\n        };\n      }\n\n      i++;\n    }\n  }\n\n  private createMapDiffs(): { [key: string]: DraggableDirective } {\n    return this.draggables.toArray().reduce((acc, curr) => {\n      acc[curr.dragModel.$$id] = curr;\n      return acc;\n    }, {});\n  }\n}\n"]}