質問編集履歴
3
指摘を受けて試した結果を追記
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子の`this.props.isSelected`に親の変更を反映させるためにはどうすれば良いのでしょうか？初歩的な質問ですがよろしくおねがいします。
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---
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# 追記
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maisumakunさんの指摘を受けてList要素を直接配列に入れるのではなく、要素の持つ情報のみを配列に入れ、List要素自体は`map`を使って生成するように変更しましたが、未だに親要素の`isSeletected`は更新されるのに小要素のものは更新されないという現象が続いています。
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```javascript
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class SideBar extends React.Component {
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constructor(props) {
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super(props);
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this.state = {
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folders: [],
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isSelected: false,
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};
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this.createFolder = this.createFolder.bind(this);
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this.changeBackColor = this.changeBackColor.bind(this);
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}
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changeBackColor(message) {
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this.setState({isSelected: !this.state.isSelected});
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console.log(this.state.isSelected);
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}
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// このメソッドを書き換えた
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createFolder() {
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this.setState({
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folders: this.state.folders.concat(
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{
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key: this.state.numFolders,
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isSelected: this.state.isSelected,
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deleteFunc: this.deleteFolder,
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changeBackColor: this.changeBackColor
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}
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)
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});
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}
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render() {
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const { classes } = this.props;
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const folders = this.state.folders;
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return (
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<Drawer
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variant="permanent"
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classes={{
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paper: sidebarStatus // hayashi: what is the paper?
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}}
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open={this.state.isOpen}
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>
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<div className={classes.allFolders}>
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// map を使って子を生成するようにした
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{ folders.map((folder) =>
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<PaperFolder
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key={folder.key}
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isSelected={folder.isSelected}
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deleteFunc={folder.deleteFunc}
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changeBackColor={folder.changeBackColor}
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/>
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)}
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</div>
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</Drawer>
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)
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}
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}
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```
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2
追記
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test
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@@ -168,6 +168,36 @@
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}
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const styles = theme => ({
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folder: {
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paddingBottom: 0,
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paddingTop: 5,
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},
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selected: {
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backgroundColor: "#e6e6e6",
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}
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});
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export default withStyles(styles)(PaperFolder);
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```
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1
質問の不十分な点を補充
test
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test
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@@ -118,11 +118,47 @@
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render() {
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const { classes } = this.props;
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const filenameText = <ListItemText primary={this.state.name} onDoubleClick={this.openTextbox}/>;
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const inputText = <TextField
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value={this.state.value}
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onChange={this.handleValue}
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onKeyDown={this.rename}
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autoFocus
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/>;
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const folderStyle = clsx({
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[classes.folder]: true,
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[classes.selected]: this.props.isSelected,
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});
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return (
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<List className={classes.folder} onClick={this.select}>
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<ListItem
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className={folderStyle}
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onClick={this.handleListClick}
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>
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// ...
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</ListItem>
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</List>
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