垫子图标按钮和垫子按钮之间的 Angular Material 切换

Question

根据媒体查询，有没有更漂亮的方法可以在 mat-icon-button 和 mat-button 之间切换？我已经对我当前的解决方案做了一个演示，但它需要两个独立的按钮。

<button type=button mat-icon-button fxHide fxShow.lt-sm (click)="onEdit($event)">
  <mat-icon>edit</mat-icon>
</button>
<button type="button" mat-button fxHide.lt-sm (click)="onEdit($event)">
  <mat-icon>edit</mat-icon> Edit
</button>

DEMO

Answer 1

遇到同样的问题，目前正在使用此解决方案。

组件.html:

<button
        mat-button
        [ngClass]="isBigDevice() ? 'mat-stroked-button' : 'mat-icon-button'"
        color="accent"
        type="button"
        (click)="coolMethodToDoStuff()"
        [disabled]="isSelected() && contextTypeIsSomething()">
    <span *ngIf="isBigDevice()">Edit</span>
    <mat-icon *ngIf="!isBigDevice()">edit</mat-icon>
</button>

有问题/注释:需要添加基本按钮样式/属性 mat-button .如果你不这样做，你会得到一个错误 color对这种 html 元素没有属性。优点是，如果您在一个按钮上有多个属性或 disabled 的条件, hidden或 *ngIf你不需要它们两次。我知道 *ngIf缺乏可读性，但目前它是避免大量重复代码的最佳方法。

我的下一步:我将为这样的事情建立一个指令。

编辑:

更多的是我的 MediaQueryService:

import {Injectable, OnDestroy} from '@angular/core';
import {BreakpointObserver, Breakpoints, BreakpointState} from '@angular/cdk/layout';
import {Subject} from 'rxjs';
import {takeUntil} from 'rxjs/operators';

@Injectable({
    providedIn: 'root'
})

export class MediaQueryService implements OnDestroy {

private _breakpointArray = {
    isXSmall: false,
    isSmall: false,
    isMedium: false,
    isLarge: false,
    isXLarge: false,
};
private _destroy$ = new Subject();

constructor(
    private _breakpointObserver: BreakpointObserver,
) {
    this._breakpointObserver
        .observe([
            Breakpoints.WebLandscape,
            Breakpoints.WebPortrait,
        ])
        .pipe(
            takeUntil(this._destroy$)
        )
        .subscribe((state: BreakpointState) => {
            _breakpointObserver.isMatched(Breakpoints.WebLandscape)
                ? this.webOrientationChangeLogger('landscape')
                : this.webOrientationChangeLogger('portrait');
        });

    this._breakpointObserver.observe([
            Breakpoints.XSmall,
            Breakpoints.Small,
            Breakpoints.Medium,
            Breakpoints.Large,
            Breakpoints.XLarge,
        ]
    )
        .pipe(
            takeUntil(this._destroy$)
        )
        .subscribe((state: BreakpointState) => {
            this._breakpointArray.isXSmall = _breakpointObserver.isMatched(Breakpoints.XSmall);
            this._breakpointArray.isSmall = _breakpointObserver.isMatched(Breakpoints.Small);
            this._breakpointArray.isMedium = _breakpointObserver.isMatched(Breakpoints.Medium);
            this._breakpointArray.isLarge = _breakpointObserver.isMatched(Breakpoints.Large);
            this._breakpointArray.isXLarge = _breakpointObserver.isMatched(Breakpoints.XLarge);
        });
}

public ngOnDestroy(): void {
    this._destroy$.next();
    this._destroy$.complete();
}

public get isSmallDevice(): boolean {
    return this.getBreakpointBoolean('isXSmall') || this.getBreakpointBoolean('isSmall');
}

public get isBigDevice(): boolean {
    return this.getBreakpointBoolean('isXLarge') || this.getBreakpointBoolean('isLarge');
}

public getBreakpointBoolean(breakpointName: string): boolean {
    return this._breakpointArray[breakpointName];
}

private webOrientationChangeLogger(orientation: string) {
    console.log(orientation);
}

}

在我使用按钮的组件内，我只是调用 isBigDevice()方法并返回 bool 值。

组件.ts:

public isBigDevice(): boolean {
    return this._mediaQueryService.isBigDevice();
}

您也可以尝试使用此 fxShow , fxHide Angular Material 的特性。