circular-progress.directive.ts
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///
/// Copyright © 2016-2020 The Thingsboard Authors
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
import { ComponentFactoryResolver, ComponentRef, Directive, ElementRef, Input, ViewContainerRef } from '@angular/core';
import { MatSpinner } from '@angular/material/progress-spinner';
@Directive({
selector: '[tb-circular-progress]'
})
export class CircularProgressDirective {
showProgressValue = false;
children: JQuery<any>;
cssWidth: any;
@Input('tb-circular-progress')
set showProgress(showProgress: boolean) {
if (this.showProgressValue !== showProgress) {
const element = this.elementRef.nativeElement;
this.showProgressValue = showProgress;
this.spinnerRef.instance._elementRef.nativeElement.style.display = showProgress ? 'block' : 'none';
if (showProgress) {
this.cssWidth = $(element).prop('style').width;
if (!this.cssWidth) {
$(element).css('width', '');
const width = $(element).prop('offsetWidth');
$(element).css('width', width + 'px');
}
this.children = $(element).children();
$(element).empty();
$(element).append($(this.spinnerRef.instance._elementRef.nativeElement));
} else {
$(element).empty();
$(element).append(this.children);
if (this.cssWidth) {
$(element).css('width', this.cssWidth);
} else {
$(element).css('width', '');
}
}
}
}
spinnerRef: ComponentRef<MatSpinner>;
constructor(private elementRef: ElementRef,
private componentFactoryResolver: ComponentFactoryResolver,
private viewContainerRef: ViewContainerRef) {
this.createCircularProgress();
}
createCircularProgress() {
this.elementRef.nativeElement.style.position = 'relative';
const factory = this.componentFactoryResolver.resolveComponentFactory(MatSpinner);
this.spinnerRef = this.viewContainerRef.createComponent(factory, 0);
this.spinnerRef.instance.mode = 'indeterminate';
this.spinnerRef.instance.diameter = 20;
const el = this.spinnerRef.instance._elementRef.nativeElement;
el.style.margin = 'auto';
el.style.position = 'absolute';
el.style.left = '0';
el.style.right = '0';
el.style.top = '0';
el.style.bottom = '0';
el.style.display = 'none';
}
}