我正在尝试将drop n'drop拖放到我的项目中，但是对于如何开始有点困惑。在Angular 7中，我们现在有了cdkDragDrop，这似乎很有希望。但是，所有示例均基于一个或多个列表/ div。我想将其与两个物料表一起使用-这甚至可能吗？是否还有其他示例，other than the ones at Angular Material?
答案 0 :(得分：0)
我创建了一个working example at Stackblitz.，但是，从一个数组移动到另一个数组的实际项目与被拖动的项目并不相同。我猜可能是因为数组中的索引不一定与表中的索引相同？有输入吗？
import {Component, ViewChild} from '@angular/core';
import {CdkDragDrop, moveItemInArray, transferArrayItem} from '@angular/cdk/drag-drop';
import { MatTable, MatTableDataSource } from '@angular/material';
export interface PeriodicElement {
name: string;
position: number;
weight: number;
symbol: string;
}
/**
* @title Basic use of `<table mat-table>`
*/
@Component({
selector: 'table-basic-example',
styleUrls: ['table-basic-example.css'],
templateUrl: 'table-basic-example.html',
})
export class TableBasicExample {
@ViewChild(MatTable) table: MatTable<any>;
displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
ELEMENT_DATA: PeriodicElement[] = [
{position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];
ELEMENT_DATA2: PeriodicElement[] = [
{position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
];
dataSource = new MatTableDataSource(this.ELEMENT_DATA);
dataSource2 = new MatTableDataSource(this.ELEMENT_DATA2);
drop(event: CdkDragDrop<string[]>) {
console.log("event.previousContainer =>", event.previousContainer);
console.log("event.container =>", event.container)
console.log("event.container.data =>", event.container.data)
console.log("event.previousIndex =>", event.previousIndex);
console.log("event.currentIndex =>", event.currentIndex);
if (event.previousContainer === event.container) {
moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
} else {
transferArrayItem(event.previousContainer.data,
event.container.data,
event.previousIndex,
event.currentIndex);
}
this.dataSource = new MatTableDataSource(this.ELEMENT_DATA);
this.dataSource2 = new MatTableDataSource(this.ELEMENT_DATA2);
}
}
/** Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */
-
<table mat-table [dataSource]="dataSource"
class="mat-elevation-z8" cdkDropList #table1="cdkDropList"
[cdkDropListData]="ELEMENT_DATA" [cdkDropListConnectedTo]="[table2]"
(cdkDropListDropped)="drop($event)">
<!--- Note that these columns can be defined in any order.
The actual rendered columns are set as a property on the row definition" -->
<!-- Position Column -->
<ng-container matColumnDef="position">
<th mat-header-cell *matHeaderCellDef> No. </th>
<td mat-cell *matCellDef="let element"> {{element.position}} </td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;" cdkDrag></tr>
</table>
<hr>
<table mat-table [dataSource]="dataSource2" class="mat-elevation-z8"
cdkDropList #table2="cdkDropList" [cdkDropListData]="ELEMENT_DATA2"
[cdkDropListConnectedTo]="[table1]" (cdkDropListDropped)="drop($event)">
<!--- Note that these columns can be defined in any order.
The actual rendered columns are set as a property on the row definition" -->
<!-- Position Column -->
<ng-container matColumnDef="position">
<th mat-header-cell *matHeaderCellDef> No. </th>
<td mat-cell *matCellDef="let element"> {{element.position}} </td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;" cdkDrag></tr>
</table>
<!-- Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->
-
table {
width: 100%;
}
.cdk-drag-preview {
box-sizing: border-box;
border-radius: 4px;
box-shadow: 0 5px 5px -3px rgba(0, 0, 0, 0.2),
0 8px 10px 1px rgba(0, 0, 0, 0.14),
0 3px 14px 2px rgba(0, 0, 0, 0.12);
}
.cdk-drag-placeholder {
opacity: 0;
}
.cdk-drag-animating {
transition: transform 250ms cubic-bezier(0, 0, 0.2, 1);
}
.example-box:last-child {
border: none;
}
.example-list.cdk-drop-list-dragging .example-box:not(.cdk-drag-placeholder) {
transition: transform 250ms cubic-bezier(0, 0, 0.2, 1);
}