@swimlane/ngx-datatable
Version:
ngx-datatable is an Angular table grid component for presenting large and complex data.
89 lines • 11.4 kB
JavaScript
import { Directive, ElementRef, HostListener, Input, Output, EventEmitter, Renderer2 } from '@angular/core';
import { fromEvent } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
export class ResizeableDirective {
constructor(element, renderer) {
this.renderer = renderer;
this.resizeEnabled = true;
this.resize = new EventEmitter();
this.resizing = false;
this.element = element.nativeElement;
}
ngAfterViewInit() {
const renderer2 = this.renderer;
this.resizeHandle = renderer2.createElement('span');
if (this.resizeEnabled) {
renderer2.addClass(this.resizeHandle, 'resize-handle');
}
else {
renderer2.addClass(this.resizeHandle, 'resize-handle--not-resizable');
}
renderer2.appendChild(this.element, this.resizeHandle);
}
ngOnDestroy() {
this._destroySubscription();
if (this.renderer.destroyNode) {
this.renderer.destroyNode(this.resizeHandle);
}
else if (this.resizeHandle) {
this.renderer.removeChild(this.renderer.parentNode(this.resizeHandle), this.resizeHandle);
}
}
onMouseup() {
this.resizing = false;
if (this.subscription && !this.subscription.closed) {
this._destroySubscription();
this.resize.emit(this.element.clientWidth);
}
}
onMousedown(event) {
const isHandle = event.target.classList.contains('resize-handle');
const initialWidth = this.element.clientWidth;
const mouseDownScreenX = event.screenX;
if (isHandle) {
event.stopPropagation();
this.resizing = true;
const mouseup = fromEvent(document, 'mouseup');
this.subscription = mouseup.subscribe((ev) => this.onMouseup());
const mouseMoveSub = fromEvent(document, 'mousemove')
.pipe(takeUntil(mouseup))
.subscribe((e) => this.move(e, initialWidth, mouseDownScreenX));
this.subscription.add(mouseMoveSub);
}
}
move(event, initialWidth, mouseDownScreenX) {
const movementX = event.screenX - mouseDownScreenX;
const newWidth = initialWidth + movementX;
const overMinWidth = !this.minWidth || newWidth >= this.minWidth;
const underMaxWidth = !this.maxWidth || newWidth <= this.maxWidth;
if (overMinWidth && underMaxWidth) {
this.element.style.width = `${newWidth}px`;
}
}
_destroySubscription() {
if (this.subscription) {
this.subscription.unsubscribe();
this.subscription = undefined;
}
}
}
ResizeableDirective.decorators = [
{ type: Directive, args: [{
selector: '[resizeable]',
host: {
'[class.resizeable]': 'resizeEnabled'
}
},] }
];
ResizeableDirective.ctorParameters = () => [
{ type: ElementRef },
{ type: Renderer2 }
];
ResizeableDirective.propDecorators = {
resizeEnabled: [{ type: Input }],
minWidth: [{ type: Input }],
maxWidth: [{ type: Input }],
resize: [{ type: Output }],
onMousedown: [{ type: HostListener, args: ['mousedown', ['$event'],] }]
};
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{\n  Directive,\n  ElementRef,\n  HostListener,\n  Input,\n  Output,\n  EventEmitter,\n  OnDestroy,\n  AfterViewInit,\n  Renderer2\n} from '@angular/core';\nimport { Subscription, fromEvent } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\n\n@Directive({\n  selector: '[resizeable]',\n  host: {\n    '[class.resizeable]': 'resizeEnabled'\n  }\n})\nexport class ResizeableDirective implements OnDestroy, AfterViewInit {\n  @Input() resizeEnabled: boolean = true;\n  @Input() minWidth: number;\n  @Input() maxWidth: number;\n\n  @Output() resize: EventEmitter<any> = new EventEmitter();\n\n  element: HTMLElement;\n  subscription: Subscription;\n  resizing: boolean = false;\n  private resizeHandle: HTMLElement;\n\n  constructor(element: ElementRef, private renderer: Renderer2) {\n    this.element = element.nativeElement;\n  }\n\n  ngAfterViewInit(): void {\n    const renderer2 = this.renderer;\n    this.resizeHandle = renderer2.createElement('span');\n    if (this.resizeEnabled) {\n      renderer2.addClass(this.resizeHandle, 'resize-handle');\n    } else {\n      renderer2.addClass(this.resizeHandle, 'resize-handle--not-resizable');\n    }\n    renderer2.appendChild(this.element, this.resizeHandle);\n  }\n\n  ngOnDestroy(): void {\n    this._destroySubscription();\n    if (this.renderer.destroyNode) {\n      this.renderer.destroyNode(this.resizeHandle);\n    } else if (this.resizeHandle) {\n      this.renderer.removeChild(this.renderer.parentNode(this.resizeHandle), this.resizeHandle);\n    }\n  }\n\n  onMouseup(): void {\n    this.resizing = false;\n\n    if (this.subscription && !this.subscription.closed) {\n      this._destroySubscription();\n      this.resize.emit(this.element.clientWidth);\n    }\n  }\n\n  @HostListener('mousedown', ['$event'])\n  onMousedown(event: MouseEvent): void {\n    const isHandle = (<HTMLElement>event.target).classList.contains('resize-handle');\n    const initialWidth = this.element.clientWidth;\n    const mouseDownScreenX = event.screenX;\n\n    if (isHandle) {\n      event.stopPropagation();\n      this.resizing = true;\n\n      const mouseup = fromEvent(document, 'mouseup');\n      this.subscription = mouseup.subscribe((ev: MouseEvent) => this.onMouseup());\n\n      const mouseMoveSub = fromEvent(document, 'mousemove')\n        .pipe(takeUntil(mouseup))\n        .subscribe((e: MouseEvent) => this.move(e, initialWidth, mouseDownScreenX));\n\n      this.subscription.add(mouseMoveSub);\n    }\n  }\n\n  move(event: MouseEvent, initialWidth: number, mouseDownScreenX: number): void {\n    const movementX = event.screenX - mouseDownScreenX;\n    const newWidth = initialWidth + movementX;\n\n    const overMinWidth = !this.minWidth || newWidth >= this.minWidth;\n    const underMaxWidth = !this.maxWidth || newWidth <= this.maxWidth;\n\n    if (overMinWidth && underMaxWidth) {\n      this.element.style.width = `${newWidth}px`;\n    }\n  }\n\n  private _destroySubscription() {\n    if (this.subscription) {\n      this.subscription.unsubscribe();\n      this.subscription = undefined;\n    }\n  }\n}\n"]}