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-rw-r--r--catalog-ui/src/app/ng2/components/loader/loader.component.ts94
1 files changed, 38 insertions, 56 deletions
diff --git a/catalog-ui/src/app/ng2/components/loader/loader.component.ts b/catalog-ui/src/app/ng2/components/loader/loader.component.ts
index 4d90b2853d..4af92eca24 100644
--- a/catalog-ui/src/app/ng2/components/loader/loader.component.ts
+++ b/catalog-ui/src/app/ng2/components/loader/loader.component.ts
@@ -11,72 +11,28 @@ export class LoaderComponent {
@Input() display:boolean;
@Input() size:string;// small || medium || large
- @Input() elementSelector:string; // required if is relative true
- @Input() relative:boolean;
-
- interval;
+ @Input() relative: boolean;
+ @Input() elementSelector: string; // optional. If is relative is set to true, option to pass in element that loader should be relative to. Otherwise, will be relative to parent element.
+
constructor (private el: ElementRef, private renderer: Renderer){
}
ngOnInit() {
-
- if (this.elementSelector) {
- let elemParent = angular.element(this.elementSelector);
- let positionStyle:string = elemParent.css('position');
- this.setStyle(positionStyle);
- }
-
- if (this.relative === true) {
- let positionStyle:string = this.el.nativeElement.parentElement.style.position;
- this.setStyle(positionStyle);
- }
if (!this.size) {
this.size = 'large';
}
- }
-
- ngOnDestroy(){
- clearInterval(this.interval);
- }
-
- calculateSizesForFixPosition = (positionStyle:string):void => {
- // This is problematic, I do not want to change the parent position.
- // set the loader on all the screen
- let parentLeft = this.el.nativeElement.parentElement.offsetLeft;
- let parentTop = this.el.nativeElement.parentElement.offsetTop;
- let parentWidth = this.el.nativeElement.parentElement.offsetWidth;
- let parentHeight = this.el.nativeElement.parentElement.offsetHeight;
- this.renderer.setElementStyle(this.el.nativeElement, 'position', positionStyle);
- this.renderer.setElementStyle(this.el.nativeElement, 'top', parentTop);
- this.renderer.setElementStyle(this.el.nativeElement, 'left', parentLeft);
- this.renderer.setElementStyle(this.el.nativeElement, 'width', parentWidth);
- this.renderer.setElementStyle(this.el.nativeElement, 'height', parentHeight);
- };
-
- setStyle = (positionStyle:string):void => {
-
- switch (positionStyle) {
- case 'absolute':
- case 'fixed':
- // The parent size is not set yet, still loading, so need to use interval to update the size.
- this.interval = window.setInterval(()=> {
- this.calculateSizesForFixPosition(positionStyle);
- }, 2000);
- break;
- default:
- // Can change the parent position to relative without causing style issues.
- this.renderer.setElementStyle(this.el.nativeElement.parentElement,'position', 'relative');
- break;
+ if (this.display === true) {
+ this.changeLoaderDisplay(true);
}
- };
+ }
ngOnChanges(changes: SimpleChanges) {
if(changes.display){
- this.changeLoaderDisplay(false);
- if ( this.display ) {
- window.setTimeout(():void => {
- this.changeLoaderDisplay(true);
+ if (this.display) {
+ this.changeLoaderDisplay(false); //display is set to true, so loader will appear unless we explicitly tell it not to.
+ window.setTimeout((): void => {
+ this.display && this.changeLoaderDisplay(true); //only show loader if we still need to display it.
}, 500);
} else {
window.setTimeout(():void => {
@@ -86,7 +42,33 @@ export class LoaderComponent {
}
}
- changeLoaderDisplay = (display:boolean):void => {
- this.renderer.setElementStyle(this.el.nativeElement, 'display', display ? 'block' : 'none');
+ changeLoaderDisplay = (display: boolean): void => {
+ if (display) {
+ this.calculateLoaderPosition();
+ this.renderer.setElementStyle(this.el.nativeElement, 'display', 'block');
+ } else {
+ this.renderer.setElementStyle(this.el.nativeElement, 'display', 'none');
+ }
+ }
+
+ calculateLoaderPosition = () => {
+ if (this.relative === true) { // Can change the parent position to relative without causing style issues.
+ let parent = (this.elementSelector) ? angular.element(this.elementSelector).get(0) : this.el.nativeElement.parentElement;
+ this.renderer.setElementStyle(parent, 'position', 'relative');
+ this.setLoaderPosition(0, 0); //will be relative to parent and appear over specified element
+ //TODO: DONT force parent to have position relative; set inner div's style instead of outer element
+ // let parentPos: ClientRect = this.el.nativeElement.parentElement.getBoundingClientRect();
+ // this.setLoaderPosition(parentPos.top, parentPos.left, parentPos.width, parentPos.height);
+ } else {
+ this.setLoaderPosition(0, 0); //will appear over whole page
+ }
}
+
+ setLoaderPosition = (top:number, left:number, width?:number, height?:number): void => {
+ this.renderer.setElementStyle(this.el.nativeElement, 'position', 'absolute');
+ this.renderer.setElementStyle(this.el.nativeElement, 'top', top? top.toString() : "0");
+ this.renderer.setElementStyle(this.el.nativeElement, 'left', left? left.toString() : "0");
+ this.renderer.setElementStyle(this.el.nativeElement, 'width', width? width.toString() : "100%");
+ this.renderer.setElementStyle(this.el.nativeElement, 'height', height? height.toString() : "100%");
+ };
}