@keith.dimatteo/angular-image-viewer
Version:
A configurable Angular image viewer component, compatible with Angular 8
215 lines • 26.8 kB
JavaScript
import * as tslib_1 from "tslib";
import { Component, HostListener, Optional, Inject, Input, Output, EventEmitter } from '@angular/core';
import { CustomImageEvent } from './models/custom-image-event-model';
import { DomSanitizer } from '@angular/platform-browser';
const DEFAULT_CONFIG = {
btnClass: 'default',
zoomFactor: 0.1,
containerBackgroundColor: '#ccc',
wheelZoom: false,
allowFullscreen: true,
allowKeyboardNavigation: true,
btnShow: {
zoomIn: true,
zoomOut: true,
rotateClockwise: true,
rotateCounterClockwise: true,
next: true,
prev: true
},
btnIcons: {
zoomIn: 'fa fa-plus',
zoomOut: 'fa fa-minus',
rotateClockwise: 'fa fa-repeat',
rotateCounterClockwise: 'fa fa-undo',
next: 'fa fa-arrow-right',
prev: 'fa fa-arrow-left',
fullscreen: 'fa fa-arrows-alt',
}
};
let AngularImageViewerComponent = class AngularImageViewerComponent {
constructor(moduleConfig, sanitizer) {
this.moduleConfig = moduleConfig;
this.sanitizer = sanitizer;
this.index = 0;
this.indexChange = new EventEmitter();
this.configChange = new EventEmitter();
this.customImageEvent = new EventEmitter();
this.styleHeight = '98vh';
this.style = { transform: '', msTransform: '', oTransform: '', webkitTransform: '' };
this.fullscreen = false;
this.loading = true;
this.scale = 1;
this.rotation = 0;
this.translateX = 0;
this.translateY = 0;
this.hovered = false;
}
ngOnChanges(changes) {
if (changes.screenHeightOccupied) {
this.styleHeight = 'calc(98vh - ' + this.screenHeightOccupied + 'px)';
// console.log('Style Height:', this.styleHeight);
}
}
ngOnInit() {
const merged = this.mergeConfig(DEFAULT_CONFIG, this.moduleConfig);
this.config = this.mergeConfig(merged, this.config);
this.triggerConfigBinding();
}
nextImage(event) {
if (this.canNavigate(event) && this.index < this.src.length - 1) {
this.loading = true;
this.index++;
this.triggerIndexBinding();
this.reset();
}
}
prevImage(event) {
if (this.canNavigate(event) && this.index > 0) {
this.loading = true;
this.index--;
this.triggerIndexBinding();
this.reset();
}
}
zoomIn() {
this.scale *= (1 + this.config.zoomFactor);
this.updateStyle();
}
zoomOut() {
if (this.scale > this.config.zoomFactor) {
this.scale /= (1 + this.config.zoomFactor);
}
this.updateStyle();
}
scrollZoom(evt) {
if (this.config.wheelZoom) {
evt.deltaY > 0 ? this.zoomOut() : this.zoomIn();
return false;
}
}
rotateClockwise() {
this.rotation += 90;
this.updateStyle();
}
rotateCounterClockwise() {
this.rotation -= 90;
this.updateStyle();
}
onLoad(url) {
this.loading = false;
}
onLoadStart(url) {
this.loading = true;
}
imageNotFound(url) {
}
onDragOver(evt) {
this.translateX += (evt.clientX - this.prevX);
this.translateY += (evt.clientY - this.prevY);
this.prevX = evt.clientX;
this.prevY = evt.clientY;
this.updateStyle();
}
onDragStart(evt) {
if (evt.dataTransfer && evt.dataTransfer.setDragImage) {
evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0);
}
this.prevX = evt.clientX;
this.prevY = evt.clientY;
}
toggleFullscreen() {
this.fullscreen = !this.fullscreen;
if (!this.fullscreen) {
this.reset();
}
}
triggerIndexBinding() {
this.indexChange.emit(this.index);
}
triggerConfigBinding() {
this.configChange.next(this.config);
}
fireCustomEvent(name, imageIndex) {
this.customImageEvent.emit(new CustomImageEvent(name, imageIndex));
}
reset() {
this.scale = 1;
this.rotation = 0;
this.translateX = 0;
this.translateY = 0;
this.updateStyle();
}
onMouseOver() {
this.hovered = true;
}
onMouseLeave() {
this.hovered = false;
}
canNavigate(event) {
return event == null || (this.config.allowKeyboardNavigation && this.hovered);
}
updateStyle() {
this.style.transform = `translate(${this.translateX}px, ${this.translateY}px) rotate(${this.rotation}deg) scale(${this.scale})`;
this.style.msTransform = this.style.transform;
this.style.webkitTransform = this.style.transform;
this.style.oTransform = this.style.transform;
}
mergeConfig(defaultValues, overrideValues) {
let result = Object.assign({}, defaultValues);
if (overrideValues) {
result = Object.assign({}, defaultValues, overrideValues);
if (overrideValues.btnIcons) {
result.btnIcons = Object.assign({}, defaultValues.btnIcons, overrideValues.btnIcons);
}
}
return result;
}
};
AngularImageViewerComponent.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: ['config',] }] },
{ type: DomSanitizer }
];
tslib_1.__decorate([
Input()
], AngularImageViewerComponent.prototype, "src", void 0);
tslib_1.__decorate([
Input()
], AngularImageViewerComponent.prototype, "screenHeightOccupied", void 0);
tslib_1.__decorate([
Input()
], AngularImageViewerComponent.prototype, "index", void 0);
tslib_1.__decorate([
Input()
], AngularImageViewerComponent.prototype, "config", void 0);
tslib_1.__decorate([
Output()
], AngularImageViewerComponent.prototype, "indexChange", void 0);
tslib_1.__decorate([
Output()
], AngularImageViewerComponent.prototype, "configChange", void 0);
tslib_1.__decorate([
Output()
], AngularImageViewerComponent.prototype, "customImageEvent", void 0);
tslib_1.__decorate([
HostListener('window:keyup.ArrowRight', ['$event'])
], AngularImageViewerComponent.prototype, "nextImage", null);
tslib_1.__decorate([
HostListener('window:keyup.ArrowLeft', ['$event'])
], AngularImageViewerComponent.prototype, "prevImage", null);
tslib_1.__decorate([
HostListener('mouseover')
], AngularImageViewerComponent.prototype, "onMouseOver", null);
tslib_1.__decorate([
HostListener('mouseleave')
], AngularImageViewerComponent.prototype, "onMouseLeave", null);
AngularImageViewerComponent = tslib_1.__decorate([
Component({
selector: 'angular-image-viewer',
template: "<div [appScreenfull]=\"fullscreen\" class=\"img-container\"\n [style.backgroundColor]=\"config.containerBackgroundColor\" (wheel)=\"scrollZoom($event)\"\n (dragover)=\"onDragOver($event)\">\n <img [src]=\"src[index]\" [ngStyle]=\"style\" alt=\"Image not found...\" (dragstart)=\"onDragStart($event)\"\n (load)=\"onLoad(src[index])\" (error)=\"imageNotFound(src[index])\" (loadstart)=\"onLoadStart(src[index])\" />\n <!-- Div below will be used to hide the 'ghost' image when dragging -->\n <div></div>\n <div class=\"spinner-container\" *ngIf=\"loading\">\n <div class=\"spinner\"></div>\n </div>\n\n <button type=\"button\" [class]=\"config.btnClass\" *ngIf=\"config.btnShow.rotateCounterClockwise\"\n (click)=\"rotateCounterClockwise()\">\n <span [class]=\"config.btnIcons.rotateCounterClockwise\"></span>\n </button>\n <button type=\"button\" [class]=\"config.btnClass\" *ngIf=\"config.btnShow.rotateClockwise\" (click)=\"rotateClockwise()\">\n <span [class]=\"config.btnIcons.rotateClockwise\"></span>\n </button>\n\n <button type=\"button\" [class]=\"config.btnClass\" *ngIf=\"config.btnShow.zoomOut\" (click)=\"zoomOut()\">\n <span [class]=\"config.btnIcons.zoomOut\"></span>\n </button>\n <button type=\"button\" [class]=\"config.btnClass\" *ngIf=\"config.btnShow.zoomIn\" (click)=\"zoomIn()\">\n <span [class]=\"config.btnIcons.zoomIn\"></span>\n </button>\n\n <button type=\"button\" [class]=\"config.btnClass\" *ngFor=\"let cBtn of config.customBtns\"\n (click)=\"fireCustomEvent(cBtn.name, index)\">\n <span [class]=\"cBtn.icon\"></span>\n </button>\n\n <button type=\"button\" id=\"ngx-fs-btn\" [class]=\"config.btnClass\" (click)=\"toggleFullscreen()\"\n *ngIf=\"config.allowFullscreen\">\n <span [class]=\"config.btnIcons.fullscreen\"></span>\n </button>\n\n <div class=\"nav-button-container\" *ngIf=\"src.length > 1\">\n <button type=\"button\" [class]=\"config.btnClass\" (click)=\"prevImage($event)\" [disabled]=\"index === 0\">\n <span [class]=\"config.btnIcons.prev\"></span>\n </button>\n <button type=\"button\" [class]=\"config.btnClass\" (click)=\"nextImage($event)\"\n [disabled]=\"index === src.length - 1\">\n <span [class]=\"config.btnIcons.next\"></span>\n </button>\n </div>\n</div>\n",
styles: [".img-container{width:100%;display:-webkit-box;display:flex;-webkit-box-pack:center;justify-content:center;-webkit-box-align:center;align-items:center;overflow:hidden}.img-container img{max-width:90%;max-height:95%}.img-container button{z-index:99;position:absolute;right:15px}.img-container button:not(:disabled){cursor:pointer}.img-container>button:nth-of-type(1):not(#ngx-fs-btn){bottom:15px}.img-container>button:nth-of-type(2):not(#ngx-fs-btn){bottom:65px}.img-container>button:nth-of-type(3):not(#ngx-fs-btn){bottom:115px}.img-container>button:nth-of-type(4):not(#ngx-fs-btn){bottom:165px}.img-container>button:nth-of-type(5):not(#ngx-fs-btn){bottom:215px}.img-container>button:nth-of-type(6):not(#ngx-fs-btn){bottom:265px}.img-container>button:nth-of-type(7):not(#ngx-fs-btn){bottom:315px}#ngx-fs-btn{top:15px}button.default{height:40px;width:40px;border:1px solid #555;border-radius:50%;background-color:#fff;opacity:.7;-webkit-transition:opacity .2s;transition:opacity .2s}button.default:hover{opacity:1}button.default:disabled{opacity:.25}.nav-button-container>button{position:relative;right:0;margin:0 10px}.nav-button-container{text-align:center;position:absolute;z-index:98;bottom:10px;left:0;right:0}.spinner-container{position:absolute;left:0;right:0;top:0;bottom:0;width:60px;height:60px;margin:auto;padding:10px;background-color:rgba(0,0,0,.4);border-radius:25%}.spinner{border-width:7px;border-style:solid;border-color:#ccc #ccc #222;border-radius:50%;height:100%;width:100%;box-sizing:border-box;-webkit-animation:2s linear infinite rotation;animation:2s linear infinite rotation}@keyframes rotation{from{-webkit-transform:rotate(0)}to{-webkit-transform:rotate(359deg)}}@-webkit-keyframes rotation{from{-webkit-transform:rotate(0)}to{-webkit-transform:rotate(359deg)}}"]
}),
tslib_1.__param(0, Optional()), tslib_1.__param(0, Inject('config'))
], AngularImageViewerComponent);
export { AngularImageViewerComponent };
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{ Component, OnInit, HostListener, Optional, Inject, Input, Output, EventEmitter, OnChanges, SimpleChanges } from '@angular/core';\nimport { ImageViewerConfig } from './models/image-viewer-config.model';\nimport { CustomImageEvent } from './models/custom-image-event-model';\nimport { DomSanitizer } from '@angular/platform-browser';\n\n\nconst DEFAULT_CONFIG: ImageViewerConfig = {\n  btnClass: 'default',\n  zoomFactor: 0.1,\n  containerBackgroundColor: '#ccc',\n  wheelZoom: false,\n  allowFullscreen: true,\n  allowKeyboardNavigation: true,\n  btnShow: {\n    zoomIn: true,\n    zoomOut: true,\n    rotateClockwise: true,\n    rotateCounterClockwise: true,\n    next: true,\n    prev: true\n  },\n  btnIcons: {\n    zoomIn: 'fa fa-plus',\n    zoomOut: 'fa fa-minus',\n    rotateClockwise: 'fa fa-repeat',\n    rotateCounterClockwise: 'fa fa-undo',\n    next: 'fa fa-arrow-right',\n    prev: 'fa fa-arrow-left',\n    fullscreen: 'fa fa-arrows-alt',\n  }\n};\n\n\n@Component({\n  selector: 'angular-image-viewer',\n  templateUrl: './angular-image-viewer.component.html',\n  styleUrls: ['./angular-image-viewer.component.scss']\n})\nexport class AngularImageViewerComponent implements OnInit, OnChanges {\n\n  @Input()\n  src: string[];\n\n  @Input()\n  screenHeightOccupied: 0;             // In Px\n\n  @Input()\n  index = 0;\n\n  @Input()\n  config: ImageViewerConfig;\n\n  @Output()\n  indexChange: EventEmitter<number> = new EventEmitter();\n\n  @Output()\n  configChange: EventEmitter<ImageViewerConfig> = new EventEmitter();\n\n  @Output()\n  customImageEvent: EventEmitter<CustomImageEvent> = new EventEmitter();\n\n  styleHeight = '98vh';\n\n  public style = { transform: '', msTransform: '', oTransform: '', webkitTransform: '' };\n  public fullscreen = false;\n  public loading = true;\n  private scale = 1;\n  private rotation = 0;\n  private translateX = 0;\n  private translateY = 0;\n  private prevX: number;\n  private prevY: number;\n  private hovered = false;\n\n  constructor(@Optional() @Inject('config') public moduleConfig: ImageViewerConfig,\n              private sanitizer: DomSanitizer) { }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes.screenHeightOccupied) {\n      this.styleHeight = 'calc(98vh - ' + this.screenHeightOccupied + 'px)';\n      // console.log('Style Height:', this.styleHeight);\n    }\n  }\n\n  ngOnInit() {\n    const merged = this.mergeConfig(DEFAULT_CONFIG, this.moduleConfig);\n    this.config = this.mergeConfig(merged, this.config);\n    this.triggerConfigBinding();\n  }\n\n  @HostListener('window:keyup.ArrowRight', ['$event'])\n  nextImage(event) {\n    if (this.canNavigate(event) && this.index < this.src.length - 1) {\n      this.loading = true;\n      this.index++;\n      this.triggerIndexBinding();\n      this.reset();\n    }\n  }\n\n  @HostListener('window:keyup.ArrowLeft', ['$event'])\n  prevImage(event) {\n    if (this.canNavigate(event) && this.index > 0) {\n      this.loading = true;\n      this.index--;\n      this.triggerIndexBinding();\n      this.reset();\n    }\n  }\n\n  zoomIn() {\n    this.scale *= (1 + this.config.zoomFactor);\n    this.updateStyle();\n  }\n\n  zoomOut() {\n    if (this.scale > this.config.zoomFactor) {\n      this.scale /= (1 + this.config.zoomFactor);\n    }\n    this.updateStyle();\n  }\n\n  scrollZoom(evt) {\n    if (this.config.wheelZoom) {\n      evt.deltaY > 0 ? this.zoomOut() : this.zoomIn();\n      return false;\n    }\n  }\n\n  rotateClockwise() {\n    this.rotation += 90;\n    this.updateStyle();\n  }\n\n  rotateCounterClockwise() {\n    this.rotation -= 90;\n    this.updateStyle();\n  }\n\n  onLoad(url) {\n    this.loading = false;\n  }\n\n  onLoadStart(url) {\n    this.loading = true;\n  }\n\n  imageNotFound(url) {\n  }\n\n  onDragOver(evt) {\n    this.translateX += (evt.clientX - this.prevX);\n    this.translateY += (evt.clientY - this.prevY);\n    this.prevX = evt.clientX;\n    this.prevY = evt.clientY;\n    this.updateStyle();\n  }\n\n  onDragStart(evt) {\n    if (evt.dataTransfer && evt.dataTransfer.setDragImage) {\n      evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0);\n    }\n    this.prevX = evt.clientX;\n    this.prevY = evt.clientY;\n  }\n\n  toggleFullscreen() {\n    this.fullscreen = !this.fullscreen;\n    if (!this.fullscreen) {\n      this.reset();\n    }\n  }\n\n  triggerIndexBinding() {\n    this.indexChange.emit(this.index);\n  }\n\n  triggerConfigBinding() {\n    this.configChange.next(this.config);\n  }\n\n  fireCustomEvent(name, imageIndex) {\n    this.customImageEvent.emit(new CustomImageEvent(name, imageIndex));\n  }\n\n  reset() {\n    this.scale = 1;\n    this.rotation = 0;\n    this.translateX = 0;\n    this.translateY = 0;\n    this.updateStyle();\n  }\n\n  @HostListener('mouseover')\n  onMouseOver() {\n    this.hovered = true;\n  }\n\n  @HostListener('mouseleave')\n  onMouseLeave() {\n    this.hovered = false;\n  }\n\n  private canNavigate(event: any) {\n    return event == null || (this.config.allowKeyboardNavigation && this.hovered);\n  }\n\n  private updateStyle() {\n    this.style.transform = `translate(${this.translateX}px, ${this.translateY}px) rotate(${this.rotation}deg) scale(${this.scale})`;\n    this.style.msTransform = this.style.transform;\n    this.style.webkitTransform = this.style.transform;\n    this.style.oTransform = this.style.transform;\n  }\n\n  private mergeConfig(defaultValues: ImageViewerConfig, overrideValues: ImageViewerConfig): ImageViewerConfig {\n    let result: ImageViewerConfig = { ...defaultValues };\n    if (overrideValues) {\n      result = { ...defaultValues, ...overrideValues };\n\n      if (overrideValues.btnIcons) {\n        result.btnIcons = { ...defaultValues.btnIcons, ...overrideValues.btnIcons };\n      }\n    }\n    return result;\n  }\n\n}\n"]}