簡述

列表中經常會遇到的問題大約幾下幾種：

• 當後台需要RWD，但欄位太多了，縮起來實在是太難看。

• 使用materia提供的MatPaginatorModule，很難去翻譯它內建字串。

• 通常list上方都會有搜尋列，需要做搜尋列的驗證。

實作

(一) RWD Table

其實欄位多的 table，要做RWD的方式。
我認為最好的畫面呈現如下：

參考至 https://lab.25sprout.com/responsive_table/

其實看過materia提供的table樣式似乎沒有這樣的排版，
於是乎就自己用css仿一個table。

assets/css/layout/_table.css

.table {
  min-width: 100%;
  text-align: center;
  flex: 0 0 auto;
}

.table tbody button {
  margin: 0 2px;
}

.table th,
.table td {
  padding: 5px;
  word-break: break-all;
}

.table .sticky-col {
  position: sticky;
  left: 0;
  top: auto;
}

.table td {
  height: 30px;
}

.table td.text-right {
  text-align: right;
  padding-right: 20px;
}

@media only screen and (max-width: 767px) {
  .table {
    display: block;
  }
  .table thead,
  .table tbody,
  .table tfoot,
  .table th,
  .table td,
  .table tr {
    display: block;
  }

  .table thead tr {
    position: absolute;
    top: -9999px;
    left: -9999px;
  }

  .table tbody tr td {
    height: auto;
    min-height: 30px;
    position: relative;
  }

  .table tbody tr td span,
  .table tbody tr td a {
    line-height: 34px;
  }

  .table td:before {
    position: absolute;
    top: 0;
    left: 10px;
    line-height: 40px;
  }

  .table td:before {
    content: attr(data-title);
  }

  .table td span.spill {
    display: inline-block;
    width: 200px;
  }

  tfoot tr td {
    position: relative;
  }

  /* spec */
  .content-main .table tr,
  .rank-container .table tr {
    border-bottom: 1px solid #ba1830;
  }

  .content-main .table tr:first-child,
  .rank-container .table tr:first-child {
    border-top: 1px solid #ba1830;
  }
}

實際運用時：

 <table class="table"></table>

套上去後就會如圖

(二) MatPaginatorModule 翻譯

如果要改變分頁的翻譯，可以自定義providers。

shared/materia/custom-mat-paginator-intl.ts：

新增一隻自定義的 paginator。

import { TranslateService } from "@ngx-translate/core";
import { MatPaginatorIntl } from "@angular/material";
import { Injectable } from "@angular/core";

@Injectable()
export class CustomMatPaginatorIntl extends MatPaginatorIntl {
  constructor(private translate: TranslateService) {
    super();

    this.translate.onLangChange.subscribe((e: Event) => {
      this.getAndInitTranslations();
    });

    this.getAndInitTranslations();
  }

  getAndInitTranslations() {
    this.translate
      .get([
        "items_per_page", 
        "next_page", 
        "previous_page", 
        "of_label"
      ])
      .subscribe(translation => {
        this.itemsPerPageLabel = translation["items_per_page"];
        this.nextPageLabel = translation["next_page"];
        this.previousPageLabel = translation["previous_page"];
        this.changes.next();
      });
  }

  getRangeLabel = (page: number, pageSize: number, length: number) => {
    if (length === 0 || pageSize === 0) {
      return `0 / ${length}`;
    }
    length = Math.max(length, 0);
    const startIndex = page * pageSize;
    const endIndex =
      startIndex < length ?
      Math.min(startIndex + pageSize, length) : startIndex + pageSize;

    return `${startIndex + 1} - ${endIndex} / ${length}`;
  };
}

參考至 https://github.com/angular/components/issues/8239

--

shared/materia/materia.module.ts：

import {
  ...
  MatPaginatorModule,
  MatPaginatorIntl
} from "@angular/material";
import { CustomMatPaginatorIntl } from "./custom-mat-paginator-intl";

@NgModule({
  imports: [
    ...
    MatPaginatorModule,
    ...
  ],
  exports: [
    ...
    MatPaginatorModule,
    ...
  ],
  declarations: [],
  providers: [
    {
      provide: MatPaginatorIntl,
      useClass: CustomMatPaginatorIntl
    }
  ]
})
export class MateriaModule {}

然後在i18n資料夾下面新增

//assets/i18n/cn.json
"items_per_page": "笔数",
"next_page": "下一页",
"previous_page": "上一页",
"of_label": "of",
...

//assets/i18n/tw.json
"items_per_page": "筆數",
"next_page": "下一頁",
"previous_page": "上一頁",
"of_label": "of",
...

(三) 搜尋列的驗證

之後會在SearchModule中詳細說明。