1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* # ============LICENSE_START=======================================================
* # Copyright (c) 2020 AT&T Intellectual Property. All rights reserved.
* # ================================================================================
* # 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.
* # ============LICENSE_END=========================================================
*/
import { Directive, ElementRef, HostListener, Input, Renderer2, OnChanges, SimpleChanges } from '@angular/core';
@Directive({
selector: '[appMaterialElevation]'
})
export class MaterialElevationDirective implements OnChanges {
@Input()
defaultElevation = 2;
@Input()
raisedElevation = 8;
constructor(
private element: ElementRef,
private renderer: Renderer2
) {
this.setElevation(this.defaultElevation);
}
ngOnChanges(_changes: SimpleChanges) {
this.setElevation(this.defaultElevation);
}
@HostListener('mouseenter')
onMouseEnter() {
this.setElevation(this.raisedElevation);
}
@HostListener('mouseleave')
onMouseLeave() {
this.setElevation(this.defaultElevation);
}
setElevation(amount: number) {
// remove all elevation classes
const classesToRemove = Array.from((<HTMLElement>this.element.nativeElement).classList).filter(c => c.startsWith('mat-elevation-z'));
classesToRemove.forEach((c) => {
this.renderer.removeClass(this.element.nativeElement, c);
});
// add the given elevation class
const newClass = `mat-elevation-z${amount}`;
this.renderer.addClass(this.element.nativeElement, newClass);
}
}
|
