如何解决Kendo React Treelist - 根据外部下拉选择选择/取消选择复选框列的值
我有一个共享组件 TreeList,如下所示: TreeList.jsx
<KendoTreeList
style={getStyle()}
tableProps={{ ref: table => (thisTable = table) }}
rowHeight={rowHeight}
scrollable="virtual"
data={processData()}
expandField={EXPAND_FIELD}
subItemsField={SUB_ITEMS_FIELD}
onExpandChange={onExpandChange}
sortable
onSortChange={handleSortChange}
sort={sort}
columns={columnDeFinitions}
resizable
onColumnResize={onColumnResize}
roWrender={renderRow}
dataItemKey={idField}
columnMenuFilter={filter}
onColumnMenuFilterChange={handleFilterChange}
reorderable
onColumnReorder={onColumnReorder}
selectedField={selectedField}
onSelectionChange={handleSelectionChange}
onHeaderSelectionChange={handleHeaderSelectionChange}
/>
在此演示中实现了从 props 访问的值和复选框的方法:https://www.telerik.com/kendo-react-ui/components/treelist/selection/#toc-customizing-the-selection
现在,选择和取消选择在正常情况下工作正常,但我无法根据外部下拉列表中的值实现这一点。因此,例如,我有一个带有选项 1、选项 2 和选项 3 的外部下拉列表。如果用户选择了选项 1,则上述组件将从我的下拉组件接收其值作为道具,例如 {{1} },如果我在树列表中选择了几条记录。现在,如果我将下拉列表的选择更改为选项 2,我希望取消选择所有复选框。我无法做到这一点。
任何建议都会有所帮助。 TIA。
解决方法
我已添加 selectedOption
作为您的 TreeList 组件的道具。
App
组件:
import * as React from "react";
import * as ReactDOM from "react-dom";
import MyTreeList from "./TreeList";
import { DropDownList } from "@progress/kendo-react-dropdowns";
import { Label } from '@progress/kendo-react-labels';
class App extends React.Component {
options = ["Option 1","Option 2","Option 3"];
state = { selectedOption: '' };
onChange = (e) => {
this.setState({selectedOption: e.value});
}
render() {
return (
<div>
<Label>Your option: </Label>
<DropDownList data={this.options} onChange={(e) => this.onChange(e)}/>
<br />
<br />
<MyTreeList selectedOption={this.state.selectedOption}/>
</div>
);
}
}
ReactDOM.render(<App />,document.querySelector("my-app"));
使用 componentDidUpdate
钩子,我已经检查了您的选择并根据您的需要更新了列表。
TreeList
组件:
import * as React from "react";
import {
TreeList,mapTree,extendDataItem,TreeListSelectionCell,TreeListHeaderSelectionCell
} from "@progress/kendo-react-treelist";
import employees from "./data";
const subItemsField = "employees";
const expandField = "expanded";
const selectField = "selected";
export default class MyTreeList extends React.Component {
state = {
data: employees.slice(),expanded: [1,2,32],selected: []
};
handleRowClick = e => {
const selected = e.dataItem.selected
? this.state.selected.filter(x => x !== e.dataItem.id)
: [...this.state.selected,e.dataItem.id];
this.setState({ selected });
};
onExpandChange = e => {
this.setState({
expanded: e.value
? this.state.expanded.filter(id => id !== e.dataItem.id)
: [...this.state.expanded,e.dataItem.id]
});
};
updateFields = dataArr => {
const { expanded,selected } = this.state;
return mapTree(dataArr,subItemsField,item =>
extendDataItem(item,{
expanded: expanded.includes(item.id),selected: selected.includes(item.id)
})
);
};
onSelectionChange = event => {
this.changeSelection(event.dataItem);
};
changeSelection = dataItem => {
const selected = dataItem.selected
? this.state.selected.filter(x => x !== dataItem.id)
: [...this.state.selected,dataItem.id];
this.setState({ selected });
};
onRowClick = event => {
this.changeSelection(event.dataItem);
};
onHeaderSelectionChange = event => {
const checked = event.syntheticEvent.target.checked;
const selected = [];
if (checked) {
mapTree(this.state.data,item => {
selected.push(item.id);
return item;
});
}
this.setState({ selected });
};
headerSelectionValue = () => {
let allSelected = true;
const selected = this.state.selected;
mapTree(this.state.data,item => {
allSelected = allSelected && selected.includes(item.id);
return item;
});
return allSelected;
};
clearSelection() {
this.setState({ selected: [] });
}
componentDidUpdate(prevProps) {
if (prevProps.selectedOption !== this.props.selectedOption) {
var selectedOption = this.props.selectedOption;
switch (selectedOption) {
case "Option 1":
this.setState({ selected: [1,3] });
break;
case "Option 2":
this.clearSelection();
break;
case "Option 3":
break;
}
}
}
render() {
return (
<div>
<TreeList
style={{ maxHeight: "510px",overflow: "auto" }}
data={this.updateFields(this.state.data)}
selectedField={selectField}
onSelectionChange={this.onSelectionChange}
onHeaderSelectionChange={this.onHeaderSelectionChange}
onRowClick={this.onRowClick}
expandField={expandField}
subItemsField={subItemsField}
onExpandChange={this.onExpandChange}
columns={[
{
field: "selected",width: "7%",headerSelectionValue: this.headerSelectionValue(),cell: TreeListSelectionCell,headerCell: TreeListHeaderSelectionCell
},{ field: "name",title: "Name",expandable: true,width: "31%" },{ field: "position",title: "Position",{
field: "hireDate",title: "Hire Date",format: "{0:d}",width: "31%"
}
]}
/>
</div>
);
}
}
工作演示在StackBlitz。
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