I know the state is updating because 1. the 'Loading...' is going away, I can console log this.state.images to see the array. However when the state updates and the loading goes the searchbar shows up but the Card's within CardList do not.
They do show up when I search for a correct string, but not before.
If I pass this.state.images to CardList they show up perfectly. However when I move to the filteredImages they only show up when filtered.
Any ideas? Thanks in advance.
class App extends Component {
constructor() {
super();
this.state = {
images:[],
searchfield: ''
}
}
getLabels = (image) => {
const AuthKey = key.key;
const res = axios.post(`https://vision.googleapis.com/v1/images:annotate?key=${AuthKey}`, {
requests: [
{
image:{
source:{
imageUri: `http://storage.googleapis.com/${image}`
}
},
features:[
{
type:"LABEL_DETECTION",
maxResults:10
}
]
}
]
});
res.then(function (response) {
const results = response.data.responses[0].labelAnnotations;
const ex = results.map(result => {
return result.description;
});
return ex;
});
return res;
};
componentDidMount() {
imageFiles.imageFiles.forEach(img => {
this.getLabels(img).then(result => {
const results = result.data.responses[0].labelAnnotations;
const labels = results.map(result => {
return result.description;
});
//Add new values to the state
this.setState({images:[...this.state.images, {img, labels}]});
});
})
}
onSearchChange = (event) => {
this.setState({searchfield: event.target.value});
}
render() {
const filteredImages = this.state.images.filter(image => {
return image.labels.includes(this.state.searchfield.toLowerCase());
});
// Create an array of objects to store the image path and the labels detected from Google Vision
if (this.state.images.length === 0) {
return <h1>Loading...</h1>
} else {
return (
<Grid className="App">
<SearchBox searchChange={this.onSearchChange}/>
<CardList images={filteredImages} />
</Grid>
)}
}
}
export default App;
class App extends Component {
constructor() {
super();
this.state = {
images:[],
searchfield: '',
filteredImages:[]
}
}
getLabels = (image) => {
const AuthKey = key.key;
const res = axios.post(`https://vision.googleapis.com/v1/images:annotate?key=${AuthKey}`, {
requests: [
{
image:{
source:{
imageUri: `http://storage.googleapis.com/${image}`
}
},
features:[
{
type:"LABEL_DETECTION",
maxResults:10
}
]
}
]
});
res.then(function (response) {
const results = response.data.responses[0].labelAnnotations;
const ex = results.map(result => {
return result.description;
});
return ex;
});
return res;
};
componentDidMount() {
imageFiles.imageFiles.forEach(img => {
this.getLabels(img).then(result => {
const results = result.data.responses[0].labelAnnotations;
const labels = results.map(result => {
return result.description;
});
//Add new values to the state
this.setState({images:[...this.state.images, {img, labels}]});
this.setState({filteredImages:[...this.state.images, {img, labels}]});
});
})
}
onSearchChange = (event) => {
this.setState({searchfield: event.target.value});
let filteredImages = this.state.images.filter(image => {
return image.labels.includes(this.state.searchfield.toLowerCase());
});
this.setState({filteredImages});
}
render() {
// Create an array of objects to store the image path and the labels detected from Google Vision
if (this.state.images.length === 0) {
return <h1>Loading...</h1>
} else {
return (
<Grid className="App">
<SearchBox searchChange={this.onSearchChange}/>
<CardList images={this.state.filteredImages} />
</Grid>
)}
}
}
export default App;
Related
I've create an autocomplete search input bar using AWS Cloudscape. When I attempt to use the onSelect to save state, it does not save state. When I select a second item from the search bar, the first item then shows up. I assume this is a state async issue. I need the most recent selection, how do I get that?
import React from "react";
import Regions from "./trailforks_regions.json"
import RegionNames from "./region_names.json"
import * as dfd from "danfojs";
import { Autosuggest } from '#cloudscape-design/components';
export class AutoCompleteInputComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
df: new dfd.DataFrame(Regions),
value: null,
final_value: "",
options: [],
status: "loading",
regionContext: [],
uri_value: "",
loaded: false
};
}
lookupRegionUriName() {
console.log("Checking for uri region name on:" + this.state.final_value)
let region_name_split = this.state.final_value.split(",")[0]
let query_df = this.state.df.query(this.state.df["name"].eq(region_name_split))
let uri_name = query_df["region_uri_name"].values
console.log("found:" + uri_name)
return uri_name
}
handleChange = event => {
this.setState({ value: event.detail.value });
};
handleSelect = event => {
console.log(event) // This shows the correct data! But the set state does not set this data.
this.setState({ final_value: event.detail.value });
this.lookupRegionUriName(this.state.final_value)
};
handleLoadItems = ({ detail: { filteringText, firstPage, samePage } }) => {
this.filteringText = filteringText;
var my_options = RegionNames.filter(regions => regions.toLowerCase().startsWith(this.filteringText.toLowerCase()))
var region_values = []
for (var i = 0; i <= my_options.length; i++) {
region_values.push({ value: my_options[i] })
}
this.setState({
options: region_values.slice(0, 25),
status: 'loading',
});
};
enteredTextLabel = value => `Use: "${value}"`;
renderInput() {
if (this.state.df != null) {
const { status, value, options, final_value, uri_value } = this.state;
return (
<>
<Autosuggest
onChange={this.handleChange}
onSelect={this.handleSelect}
onLoadItems={this.handleLoadItems}
value={value}
options={options}
enteredTextLabel={this.enteredTextLabel}
ariaLabel="Autosuggest example with suggestions"
placeholder="Enter Trailforks Region Name"
empty="No matches found"
finishedText={this.filteringText ? `End of "${this.filteringText}" results` : 'End of all results'}
//status={status}
loadingText="searching"
filteringType="manual"
/>
</>
)
} else {
return (<></>)
}
}
render() {
return (
<>
{this.renderInput()}
</>
)
}
}
Figured it out. It was a state issue, here are the changes for future people:
import React from "react";
import Regions from "./regions.json"
import RegionNames from "./region_names.json"
import * as dfd from "danfojs";
import { Autosuggest } from '#cloudscape-design/components';
export class AutoCompleteInputComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
df: new dfd.DataFrame(Regions),
value: null,
final_value: "",
options: [],
status: "loading",
regionContext: [],
uri_value: "",
loaded: false
};
}
updateRegion(state_object) {
this.lookupRegionUriName()
return state_object.final_value
}
lookupRegionUriName() {
console.log("Checking for uri region name on:" + this.state.final_value)
let region_name_split = this.state.final_value.split(",")[0]
let query_df = this.state.df.query(this.state.df["name"].eq(region_name_split))
let uri_name = query_df["region_uri_name"].values
this.setState({uri_value: uri_name})
console.log("found:" + uri_name)
}
handleChange = event => {
this.setState({ value: event.detail.value });
};
handleSelect = event => {
console.log(event) // This shows the correct data! But the set state does not set this data.
this.setState({ final_value: event.detail.value });
this.lookupRegionUriName(this.state.final_value)
};
handleLoadItems = ({ detail: { filteringText, firstPage, samePage } }) => {
this.filteringText = filteringText;
var my_options = RegionNames.filter(regions => regions.toLowerCase().startsWith(this.filteringText.toLowerCase()))
var region_values = []
for (var i = 0; i <= my_options.length; i++) {
region_values.push({ value: my_options[i] })
}
this.setState({
options: region_values.slice(0, 25),
status: 'loading',
});
};
enteredTextLabel = value => `Use: "${value}"`;
renderInput() {
if (this.state.df != null) {
const { status, value, options, final_value, uri_value } = this.state;
return (
<>
<Autosuggest
onChange={this.handleChange}
onSelect={event => {this.setState({final_value: event.detail.value}, () => {this.updateRegion(this.state)})}}
//onSelect={this.handleSelect}
onLoadItems={this.handleLoadItems}
value={value}
options={options}
enteredTextLabel={this.enteredTextLabel}
ariaLabel="Autosuggest example with suggestions"
placeholder="Enter Trailforks Region Name"
empty="No matches found"
finishedText={this.filteringText ? `End of "${this.filteringText}" results` : 'End of all results'}
status={status}
loadingText="searching"
filteringType="manual"
/>
</>
)
} else {
return (<></>)
}
}
render() {
return (
<>
{this.renderInput()}
</>
)
}
}
Panel is a datamodel fetched from database. avialablePanels is a dropdown where I can select an option I want. PanelCode dropdown is populated using a lookup table because it acts as a form where the displayed value is what Panel['PanelCode'] has and other values with which I can update. When I update a value of Panel[PanelCode] with the help of indexing using the PanelCode dropdown form it initially updates the value in the Panel['PanelCode'] array. Now lets say I want to update another value in the Panel['PanelCode'] and save them together as soon as I select another option from avialablePanels the first updated value of Panel['PanelCode'] is lost.
Panel: {
PanelCode: [ 1, 4 ]
}
availablePanels:[
{ OptionCode: 'R1-1', OptionKey: 1, OptionValue: 'Stop' },
{ OptionCode: 'R1-3P',OptionKey: 4,OptionValue: 'All Way (plaque)'}
]
export default class PanelTest extends Component {
constructor(props) {
super(props);
console.log(this.props.pointModel)
this.state = {...this.props.pointModel,
availablePanels:[],
selectedIndex: 0,
selectedPanel: null,
tempPanelCode: this.props.pointModel.Panel.PanelCode[0]===null?0:
this.props.pointModel.Panel.PanelCode[0],
}
}
render() {
return(
<Container>
{this.state.availablePanels.length>0 &&
<PtSelect label="Available Panel"
options={this.state.availablePanels}
name="selectedPanel" defaultVal={this.state.selectedPanel}
onChange={this.onChangeSelectedPanelDropdown} />}
{this.renderPanelinfo()}
</Container>
)
}
onChangeSelectedPanelDropdown = (e) => {
const { target } = e;
const {name, value} = target;
let indexVal = this.state.Panel.PanelCode.indexOf(parseInt(value))
this.setState({ [name]: parseInt(value),
selectedIndex:indexVal,
tempPanelCode: this.props.pointModel.Panel.PanelCode[indexVal]===null?0:
this.props.pointModel.Panel.PanelCode[indexVal]
});
}
renderPanelinfo = () =>{
const {typeOptions} = DropdownLib.getSignNum().Signs_Types;
/* typeOptions looks like availablePanels but with more options */
return (
<div>
<PtSelect label="Panel Code" options={typeOptions}
disabled={this.props.disabled}
name="PanelCode" defaultVal={this.state.tempPanelCode}
onChange={this.onChangeDropdown} />
</div>
)
}
getAvaialablePanels=()=>{
const availablePanelOptions = []
const optionKey = []
//const optionvalue = []
fetch(`${config.server}/getavailablepanels/`+this.state.Support.SignId)
.then(response=>
{
return response.json();
})
.then(data=>{
for (var i =0;i<data.length;i++){
availablePanelOptions.push(data[i]['OptionCode'])
optionKey.push(data[i]['OptionKey'])
//optionvalue.push(data[i]['OptionValue'])
}
let dropOptions = availablePanelOptions.map((option,idx)=>{
return {key:optionKey[idx],value: optionKey[idx], label:option}
});
this.setState({
availablePanels:dropOptions
});
})
.catch(error=>{
console.log(error);
});
}
onChangeDropdown = (e) => {
const { target } = e;
const {name, value} = target;
this.props.triggerNeedSave();
// eslint-disable-next-line
let stateVariable = 'temp'+[name]
this.setState({
[stateVariable]: parseInt(value)
});
this.props.pointModel.Panel[name][this.state.selectedIndex] = parseInt(value);
console.log(this.state)
}
componentDidMount(){
this.getAvaialablePanels()
}
}
Any help is really appreciated.
I cant figure out why my Login component is not re-rendering what is on the page. The state is changed to loginShow after I click on a "Log In" button on top of my form.
import React from 'react';
import SignUp from '../SignUp';
import Cards from '../Articles/Cards';
import Login from '../LogIn';
export default class Gecko extends React.Component {
constructor(props) {
super(props);
this.state = { requestedPostsThatWeGotFromGecko: null, }
this.clickMe = this.clickMe.bind(this)
this.state = {
loginStatus: "loginHide",
authType: "signup"
};
this.loginClose = this.loginClose.bind(this);
this.loginOpen = this.loginOpen.bind(this);
}
loginClose(e) {
e.stopPropagation();
this.setState({
loginStatus: "loginHide"
});
}
loginOpen() {
this.setState({
loginStatus: "loginShow"
});
}
clickMe = () => {
const {requestedPostsThatWeGotFromGecko} = this.state;
this.setState({ requestedPostsThatWeGotFromGecko: !requestedPostsThatWeGotFromGecko })
}
/* mainLogIn = () => {
const {loginStatus} = this.state;
this.setState({ loginStatus: 'loginHide' })
} */
render() {
const { requestedPostsThatWeGotFromGecko } = this.state;
const { loginStatus } = this.state;
console.log(loginStatus);
// const { authType } = this.state;
// if (loginStatus === "loginHide") return <SignUp login={() => this.clickMe()} />
// if (requestedPostsThatWeGotFromGecko.props === true) return <Cards />
if (loginStatus !== "loginShow") return (
<div className="gecko">
{requestedPostsThatWeGotFromGecko ? (
<Cards />
): (
<SignUp login={() => this.clickMe()} />
)
}
</div>
);
if (loginStatus === "loginShow") return <Login />
}
}
I believe the issue lies where I am trying to set what is being displayed using the conditional operator at the end of the code above. I have included where I am setting the state and props from my other components in the code below.
const onClick = () => {
this.props.login();
console.log('rich');
}
const mainLogIn = () => {
this.setState({
loginStatus: "loginShow"
});
console.log('rich1');
console.log(this.state);
}
const onClick = () => {
this.props.login();
console.log('rich');
}
const mainSignUp = () => {
this.props.signup();
this.setState({
loginStatus: "loginHide"
});
console.log('rich2');
}
I am trying to conditionally render a component based on toggling of flag inside state. It looks like the state is getting updated but the component is not getting rendered. Can some one tell what is wring here. renderTree function updates the state, but render is not called then.
import React from "react";
import CheckboxTree from "react-checkbox-tree";
import "react-checkbox-tree/lib/react-checkbox-tree.css";
import { build } from "../data";
import { Input, Dropdown } from "semantic-ui-react";
import _ from "lodash";
class Widget extends React.Component {
constructor(props) {
super(props);
this.state = {
nodes: build(),
checked: [],
expanded: [],
isDropdownExpanded: false,
keyword: ""
};
}
onCheck = checked => {
this.setState({ checked }, () => {
console.log(this.state.checked);
});
};
onExpand = expanded => {
this.setState({ expanded }, () => {
console.log(this.state.expanded);
});
};
renderTree = () => {
this.setState(
prevState => {
return {
...prevState,
isDropdownExpanded: !prevState.isDropdownExpanded
};
},
() => {
console.log(this.state);
}
);
};
onSearchInputChange = (event, data, searchedNodes) => {
this.setState(prevState => {
if (prevState.keyword.trim() && !data.value.trim()) {
return {
expanded: [],
keyword: data.value
};
}
return {
expanded: this.getAllValuesFromNodes(searchedNodes, true),
keyword: data.value
};
});
};
shouldComponentUpdate(nextProps, nextState) {
if (this.state.keyword !== nextState.keyword) {
return true;
}
if (!_.isEqual(this.state.checked, nextState.checked)) {
return true;
}
if (_.isEqual(this.state.expanded, nextState.expanded)) {
return false;
}
return true;
}
getAllValuesFromNodes = (nodes, firstLevel) => {
if (firstLevel) {
const values = [];
for (let n of nodes) {
values.push(n.value);
if (n.children) {
values.push(...this.getAllValuesFromNodes(n.children, false));
}
}
return values;
} else {
const values = [];
for (let n of nodes) {
values.push(n.value);
if (n.children) {
values.push(...this.getAllValuesFromNodes(n.children, false));
}
}
return values;
}
};
keywordFilter = (nodes, keyword) => {
let newNodes = [];
for (let n of nodes) {
if (n.children) {
const nextNodes = this.keywordFilter(n.children, keyword);
if (nextNodes.length > 0) {
n.children = nextNodes;
} else if (n.label.toLowerCase().includes(keyword.toLowerCase())) {
n.children = nextNodes.length > 0 ? nextNodes : [];
}
if (
nextNodes.length > 0 ||
n.label.toLowerCase().includes(keyword.toLowerCase())
) {
n.label = this.getHighlightText(n.label, keyword);
newNodes.push(n);
}
} else {
if (n.label.toLowerCase().includes(keyword.toLowerCase())) {
n.label = this.getHighlightText(n.label, keyword);
newNodes.push(n);
}
}
}
return newNodes;
};
getHighlightText = (text, keyword) => {
const startIndex = text.indexOf(keyword);
return startIndex !== -1 ? (
<span>
{text.substring(0, startIndex)}
<span style={{ color: "red" }}>
{text.substring(startIndex, startIndex + keyword.length)}
</span>
{text.substring(startIndex + keyword.length)}
</span>
) : (
<span>{text}</span>
);
};
render() {
const { checked, expanded, nodes, isDropdownExpanded } = this.state;
let searchedNodes = this.state.keyword.trim()
? this.keywordFilter(_.cloneDeep(nodes), this.state.keyword)
: nodes;
return (
<div>
<Dropdown fluid selection options={[]} onClick={this.renderTree} />
{isDropdownExpanded && (
<div>
<Input
style={{ marginBottom: "20px" }}
fluid
icon="search"
placeholder="Search"
iconPosition="left"
onChange={(event, data) => {
this.onSearchInputChange(event, data, searchedNodes);
}}
/>
<CheckboxTree
nodes={searchedNodes}
checked={checked}
expanded={expanded}
onCheck={this.onCheck}
onExpand={this.onExpand}
showNodeIcon={true}
/>
</div>
)}
</div>
);
}
}
export default Widget;
Problem is in your shouldComponentUpdate method:
shouldComponentUpdate(nextProps, nextState) {
if (this.state.keyword !== nextState.keyword) {
return true;
}
if (!_.isEqual(this.state.checked, nextState.checked)) {
return true;
}
if (_.isEqual(this.state.expanded, nextState.expanded)) {
return false;
}
return true;
}
Since renderTree only changes isDropdownExpanded value, shouldComponentUpdate always returns false
If shouldComponenetUpdate returns true then your component re-renders, otherwise it dosen't.
In your code sandbox, it can be seen that every time you click on the dropdown, the shouldComponenetUpdate returns false for this condition
if (_.isEqual(this.state.expanded, nextState.expanded)) {
return false;
}
Either you need to change the state of this variable in your renderTree function or you need to re-write this condition as
if (_.isEqual(this.state.isDropdownExpanded, nextState.isDropdownExpanded)) {
return false;
}
Ciao, to force a re-render in React you have to use shouldComponentUpdate(nextProps, nextState) function. Something like:
shouldComponentUpdate(nextProps, nextState) {
return this.state.isDropdownExpanded !== nextState.isDropdownExpanded;
}
When you change isDropdownExpanded value, shouldComponentUpdate will be triggered and in case return is equal to true, component will be re-rendered. Here working example (based on your codesandbox).
I'm trying to make Infinite scrolling and used React-Waypoint.
I would like to show {this._renderList() } infinitely.
but It still didn't work.
I'm using YTS API, and It seems has page and limit Parameter... Do you guys have Idea of how can I show data infinitely?
this is the link of yts API
https://yts.am/api#list_movies
import React, {Component} from 'react';
import L_MovieList from './L_MovieList';
import L_Ranking from './L_Ranking';
import './L_Right_List.css';
import Waypoint from 'react-waypoint';
class L_BoxOffice extends Component {
state = {
currentPage: 0,
data : []
};
constructor(props) {
super(props);
this.state = {
movies: []
}
this._renderRankings = this._renderRankings.bind(this);
this._renderList = this._renderList.bind(this);
}
componentWillMount() {
this._getMovies();
}
_renderRankings = () => {
const movies = this.state.movies.map((movie, i) => {
console.log(movie)
return <L_Ranking title={movie.title_english} key={movie.id} genres={movie.genres} index={i}/>
})
return movies
}
_renderList = () => {
fetch(`https://yts.am/api/v2/list_movies.json?sort_by=download_count&page=${this.state.currentPage}`)
.then((res) => this.setState((prevState) => ({currentPage: prevState.currentPage + 1, data: res.body}));
const movies = this.state.movies.map((movie) => {
console.log(movie)
return <L_MovieList title={movie.title_english} poster={movie.medium_cover_image} key={movie.id} genres={movie.genres} language={movie.language} runtime={movie.runtime} year={movie.year} rating={movie.rating} likes={movie.likes} trcode={movie.yt_trailer_code}/>
})
return movies
}
_getMovies = async () => {
const movies = await this._callApi()
this.setState({
movies
})
}
_callApi = () => {
return fetch('https://yts.am/api/v2/list_movies.json?sort_by=download_count&limit=10').then(potato => potato.json())
.then(json => json.data.movies)
.catch(err => console.log(err))
}
getNextPage = () => {
fetch(`https://yts.am/api/v2/list_movies.json?sort_by=download_count&page=${this.state.currentPage}`).
then((res) => this.setState((prevState) => ({currentPage: prevState.currentPage + 1, data: res.body}));
}
render() {
const {movies} = this.state;
let sub_title;
let right_information;
if (this.props.page == 'main') {
sub_title = <div>Today Box Office</div>;
right_information = <div>
aaa</div>;
} else if (this.props.page == 'box_office') {
right_information = <div className={movies
? "L_Right_List"
: "L_Right_List--loading"}>
{this._renderList()}
{
this.state.data.map((currentData) => <div>{this._renderList()}</div>)
}
<Waypoint onEnter={this.getNextPage}/>
</div>;
}
return (<div style={{
backgroundColor: '#E5E5E5',
paddingTop: '20px',
paddingLeft: '20px'
}}>
{sub_title}
<div className={movies
? "L_Left_Ranking"
: "L_Left_Ranking--loading"}>
<div className="L_Left_Ranking_title">영화랭킹</div>
{this._renderRankings()}
</div>
{right_information}
</div>);
}
}
export default L_BoxOffice;