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kseamonmmalerba
kseamon
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mmalerba
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fix(material-experimental/mdc-table): Fix sticky scrolling (#21211)
Also adds some demos that show it working and how to work around some of the other style differences from the original MatTable. (cherry picked from commit b6be078)
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-31
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6 files changed

+226
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‎src/dev-app/mdc-table/BUILD.bazel

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],
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deps = [
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"//src/material-experimental/mdc-table",
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"//src/material/icon",
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"@npm//@angular/router",
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],
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)

‎src/dev-app/mdc-table/mdc-table-demo-module.ts

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*/
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import {NgModule} from '@angular/core';
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import {MatIconModule} from '@angular/material/icon';
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import {MatTableModule} from '@angular/material-experimental/mdc-table';
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import {RouterModule} from '@angular/router';
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import {MdcTableDemo} from './mdc-table-demo';
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@NgModule({
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imports: [
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MatIconModule,
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MatTableModule,
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RouterModule.forChild([{path: '', component: MdcTableDemo}]),
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],

‎src/dev-app/mdc-table/mdc-table-demo.html

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<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
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<!-- Position Column -->
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<ng-container matColumnDef="position">
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<th mat-header-cell *matHeaderCellDef> No. </th>
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<td mat-cell *matCellDef="let element"> {{element.position}} </td>
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</ng-container>
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<!-- Name Column -->
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<ng-container matColumnDef="name">
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<th mat-header-cell *matHeaderCellDef> Name </th>
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<td mat-cell *matCellDef="let element"> {{element.name}} </td>
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</ng-container>
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<!-- Weight Column -->
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<ng-container matColumnDef="weight">
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<th mat-header-cell *matHeaderCellDef> Weight </th>
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<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
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</ng-container>
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<!-- Symbol Column -->
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<ng-container matColumnDef="symbol">
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<th mat-header-cell *matHeaderCellDef> Symbol </th>
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<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
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</table>
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<h2> Basic </h2>
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<div class="example-container mat-elevation-z8">
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<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
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<!-- Position Column -->
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<ng-container matColumnDef="position">
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<th mat-header-cell *matHeaderCellDef> No. </th>
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<td mat-cell *matCellDef="let element"> {{element.position}} </td>
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</ng-container>
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<!-- Name Column -->
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<ng-container matColumnDef="name">
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<th mat-header-cell *matHeaderCellDef> Name </th>
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<td mat-cell *matCellDef="let element"> {{element.name}} </td>
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</ng-container>
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<!-- Weight Column -->
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<ng-container matColumnDef="weight">
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<th mat-header-cell *matHeaderCellDef> Weight </th>
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<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
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</ng-container>
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<!-- Symbol Column -->
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<ng-container matColumnDef="symbol">
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<th mat-header-cell *matHeaderCellDef> Symbol </th>
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<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
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</table>
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</div>
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<h2> Sticky Columns </h2>
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<div class="example-container mat-elevation-z8 example-sticky-columns">
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<table mat-table [dataSource]="dataSource">
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<!-- Name Column -->
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<ng-container matColumnDef="name" sticky>
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<th mat-header-cell *matHeaderCellDef> Name </th>
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<td mat-cell *matCellDef="let element"> {{element.name}} </td>
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</ng-container>
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<!-- Position Column -->
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<ng-container matColumnDef="position">
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<th mat-header-cell *matHeaderCellDef> No. </th>
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<td mat-cell *matCellDef="let element"> {{element.position}} </td>
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</ng-container>
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<!-- Weight Column -->
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<ng-container matColumnDef="weight">
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<th mat-header-cell *matHeaderCellDef> Weight </th>
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<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
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</ng-container>
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<!-- Symbol Column -->
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<ng-container matColumnDef="symbol">
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<th mat-header-cell *matHeaderCellDef> Symbol </th>
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<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
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</ng-container>
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<!-- Star Column -->
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<ng-container matColumnDef="star" stickyEnd>
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<th mat-header-cell *matHeaderCellDef></th>
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<td mat-cell *matCellDef="let element">
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<mat-icon>more_vert</mat-icon>
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</td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns2"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns2;"></tr>
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</table>
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</div>
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<h2> Sticky Header </h2>
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<div class="example-container mat-elevation-z8 example-sticky-header">
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<table mat-table [dataSource]="dataSource">
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<!-- Position Column -->
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<ng-container matColumnDef="position">
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<th mat-header-cell *matHeaderCellDef> No. </th>
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<td mat-cell *matCellDef="let element"> {{element.position}} </td>
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</ng-container>
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<!-- Name Column -->
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<ng-container matColumnDef="name">
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<th mat-header-cell *matHeaderCellDef> Name </th>
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<td mat-cell *matCellDef="let element"> {{element.name}} </td>
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</ng-container>
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<!-- Weight Column -->
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<ng-container matColumnDef="weight">
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<th mat-header-cell *matHeaderCellDef> Weight </th>
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<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
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</ng-container>
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<!-- Symbol Column -->
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<ng-container matColumnDef="symbol">
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<th mat-header-cell *matHeaderCellDef> Symbol </th>
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<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns; sticky: true"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
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</table>
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</div>
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<h2> Sticky Footer </h2>
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<div class="example-container mat-elevation-z8 example-sticky-footer">
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<table mat-table [dataSource]="dataSource">
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<!-- Position Column -->
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<ng-container matColumnDef="position">
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<th mat-header-cell *matHeaderCellDef> No. </th>
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<td mat-cell *matCellDef="let element"> {{element.position}} </td>
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<td mat-footer-cell *matFooterCellDef> number </td>
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</ng-container>
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<!-- Name Column -->
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<ng-container matColumnDef="name">
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<th mat-header-cell *matHeaderCellDef> Name </th>
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<td mat-cell *matCellDef="let element"> {{element.name}} </td>
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<td mat-footer-cell *matFooterCellDef> string </td>
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</ng-container>
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<!-- Weight Column -->
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<ng-container matColumnDef="weight">
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<th mat-header-cell *matHeaderCellDef> Weight </th>
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<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
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<td mat-footer-cell *matFooterCellDef> number </td>
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</ng-container>
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<!-- Symbol Column -->
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<ng-container matColumnDef="symbol">
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<th mat-header-cell *matHeaderCellDef> Symbol </th>
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<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
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<td mat-footer-cell *matFooterCellDef> string </td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
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<tr mat-footer-row *matFooterRowDef="displayedColumns; sticky: true"></tr>
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</table>
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</div>

‎src/dev-app/mdc-table/mdc-table-demo.scss

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.example-container {
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height: 400px;
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margin-bottom: 24px;
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width: 550px;
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max-width: 100%;
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overflow: auto;
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}
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h2 {
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margin: 0 0 16px;
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}
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table {
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width: 800px;
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}
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.example-sticky-columns {
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td {
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background-color: white;
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}
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td.mat-mdc-column-star {
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width: 20px;
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padding-right: 8px;
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}
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th.mat-mdc-column-position, td.mat-mdc-column-position {
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padding-left: 8px;
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}
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// Unlike with the classic MatTable, border-right does not work due to border-collapse.
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// Using :before to not conflict with popover-edit and column-resize which use :after.
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.mat-mdc-table-sticky:first-child,
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.mat-mdc-table-sticky:last-child {
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&::before {
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background-color: #e0e0e0;
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bottom: 0;
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content: '';
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position: absolute;
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top: 0;
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width: 1px;
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}
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}
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.mat-mdc-table-sticky:first-child::before {
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right: 0;
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}
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.mat-mdc-table-sticky:last-child::before {
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left: 0;
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}
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}
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.example-sticky-header {
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.mat-mdc-header-row th::before {
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background-color: #e0e0e0;
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bottom: 0;
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content: '';
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height: 1px;
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left: 0;
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position: absolute;
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right: 0;
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}
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}
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.example-sticky-footer {
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td {
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background-color: white;
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}
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.mat-mdc-footer-row td::before {
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background-color: #e0e0e0;
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content: '';
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height: 1px;
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left: 0;
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position: absolute;
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right: 0;
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top: 0;
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}
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}

‎src/dev-app/mdc-table/mdc-table-demo.ts

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styleUrls: ['mdc-table-demo.css'],
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})
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export class MdcTableDemo {
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displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
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dataSource = ELEMENT_DATA;
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readonly displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
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readonly displayedColumns2 =
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['name', 'position', 'weight', 'symbol', 'position', 'weight', 'symbol', 'star'];
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readonly dataSource = ELEMENT_DATA;
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}

‎src/material-experimental/mdc-table/table.scss

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@include mdc-data-table-core-styles($query: $mat-base-styles-without-animation-query);
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.mat-table-sticky {
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.mat-mdc-table-sticky {
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@include vendor-prefixes.position-sticky;
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}
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