3sec Demo https://www.youtube.com/watch?v=bo2nNQXbhI8&feature=youtu.be
https://gist.github.com/weichenghsu/407a8862f3382a425fb531b3dedcd6f5
As title, the selected option will be restored to unselected status
And onChange method has no effect for the official tutorial example.
My use case is that when a user picks a value from the dropdown. It should fire an action to fetch other data and render on another form
const chooseTable = ({items, meta:{touched, error}}) => (
<select
onChange={event => {
console.log(this.props.fields);
this.props.tableNameOnChange(event.target.value);
}}>
<option value="">Select</option>
{
items.map((item :any, i: integer) =>
<option key={item.id} value={item.id}>{item.name}</option>
)
}
</select>
)
<Field component={chooseTable}
items={schemaData.tableList}
name="tableName"
>
{/*<option value="#ff0000">Red</option>*/}
{/*<option value="#00ff00">Green</option>*/}
{/*<option value="#0000ff">Blue</option>*/}
</Field>
UIBuilderForm = reduxForm({
form: 'dashbaordUiBuilderForm',
fields: ['tableName']
}
})
(UIBuilderForm as any);
// Decorate with connect to read form values
const selector = formValueSelector('dashbaordUiBuilderForm')
// export default connect(mapStateToProps, mapDispatchToProps)(UIBuilderForm);
export default connect(state => {
const TableSchemaName = selector(state, 'TableSchemaName')
return {
TableSchemaName
}
}
I was banging my head on a similar issue with the react-native picker. Try writing your 'chooseTable' as a component instead of a stateless function and use 'this.state' and 'this.setState' to refer to what value is selected. Here's an example from my picker code:
class ExpirePicker extends React.Component {
constructor(props) {
super(props)
this.state = {
selected: 'ASAP'
}
}
render() {
const { input: { onChange, ...rest }} = this.props
return (
<Picker
style={style.input}
selectedValue={this.state.selected}
onValueChange={(value) => {
this.setState({selected: value})
onChange(value)
}}
{...rest}>
{Object.keys(ExpireTypes).map(renderItem)}
</Picker>
)
}
}
Could you also be using the element's "onChange" event and not binding it to redux-forms "onChange" prop?
Related
With a text field in the parent component, I want to filter through multiple child components where the string is being passed through the props. The child components have been outputted through a map function which is importing data from an API into the props also. I have the user input console logging after being passed as props to the child (searchTerm). My problem is that I can't hide the display of individual components based on the user's input. The trouble I'm having is that when one decides to hide itself - they all do. I've tried indexOf and have found include() to be more useful. I'm worried about my approach to the problem and would appreciate some wisdom from more seasoned react developers.
//parent component
render() {
return (
<React.Fragment>
<input type="text" className = {styles.searchField} id="searchField" placeholder = "Search..." onChange = {this.getUserInput}/>
<div className={styles.container}>
{this.state.importedBooks.map((element, index) => (
<Tile key ={index} searchTerm ={this.state.searchTerm} buy ={element.amazon_product_url}
img ={element.book_image} summary ={element.description} url={element.book_image}
book_author ={element.author} book_title ={element.title} />
))}
</div>
</React.Fragment>);
}
}
//child component
class Tile extends React.Component {
public state:{display:boolean} = {display:true};
public getContainerContent = () => {
const containers: NodeListOf<Element> | null = document.querySelectorAll("#container");
containers.forEach(element => {
if (element.innerHTML.toLocaleLowerCase().includes(this.props.searchTerm) !== false) {
this.setState({display:true});
}
else if (this.props.searchTerm == "") {
this.setState({display:true});
}
else {
this.setState({ display: false });
}
})
};
public componentWillReceiveProps = () => {
this.getContainerContent();
}
render() {
const renderContainer = this.state.display ? styles.container : styles.hideDisplay;
return (
<div className={styles.container} id="container">
<h1>{this.props.book_title}</h1>
<h2>{this.props.book_author}</h2>
<img src = {this.props.img} alt="book cover"/>
<p>{this.props.summary}</p>
Purchase
</div> );
}
}
I think the problem stems from the getContainerContent method in your child component.
Why would a single child component be concerned with data that belongs to other child components?
A way you can solve this is to first declare in the parent component which props are you going to match the filter against when displaying child components.
Then, you could iterate over these declared props and decide whether the component should display a child component or not.
// parent comp
private shouldDisplayElement (element, searchTerm: string): boolean {
const propsToMatchFiltersAgainst = ['book_title', 'book_author', 'buy', /* etc... */];
let shouldDisplay = false;
for (const p of propsToMatchFiltersAgainst) {
if (`${element[p]}`.toLowerCase().includes(searchTerm.trim())) {
shouldDisplay = true;
}
}
return shouldDisplay;
}
// parent's render fn
<div className={styles.container}>
{this.state.importedBooks.map((element, index) => (
this.shouldDisplayElement(element, this.state.searchTerm)
? <Tile
key={index}
buy={element.amazon_product_url}
img={element.book_image}
summary={element.description}
url={element.book_image}
book_author={element.author} book_title={element.title}
/>
: null
))}
</div>
This way, given the current situation, you don't need to use the getContainerContent method in your child component anymore.
I am trying to retrieve a single input value and log it. This is an edit form with existing name value prop.
I am not setting state 'name' with field input's value for some reason. I am not sure how to structure the connect part which I think is my problem. In particular, I am not clear on how to write mapStateToProps to include both my non-form state and form state.
partial scaled down code:
import { Field, reduxForm, formValueSelector } from 'redux-form';
import { connect } from 'react-redux';
import { updateStable } from '../../actions/index';
const selector = formValueSelector('myEditForm');
class EditStuff extends Component {
constructor(props) {
super(props);
this.state = {
name: this.props.name
};
}
componentDidMount() {
this.props.initialize({
name: this.props.name || ''
});
}
componentDidUpdate() {
// this.state.name is not getting set from input value
this.props.updateLocalActiveStuffData(this.state.name);
}
render() {
const { handleSubmit } = this.props;
return (
<div>
<form onSubmit={handleSubmit(this.onSubmit.bind(this))}>
<Field
label="Name"
name="name"
class="name"
type="text"
component={renderField}
/>
<button type="submit" className="btn btn-primary">
Submit
</button>
</form>
</div>
</div>
);
}
}
function mapStateToProps(state) {
return {
displayEditForm: state.displayEditForm, //my own non-form related state
name: selector(state, 'name') //form input 'name'
};
}
export default connect(mapStateToProps, { updateStuff })(
reduxForm({
form: 'myEditForm'
})(EditStuff)
);
I think if you can't retrieve the value it's because the name of your form in reduxForm and the formValueSelector name are different 'StableEditForm' != 'myEditForm'
You have more info on selectors here
If you want to initialise your form with values, you should set it from your state in mapStateToProps with the initialValues props, something like this:
function mapStateToProps(state) {
return {
initialValues: state.displayEditForm, // value of your form
};
}
A great exemple here
I hope this can help you
How can I create a custom input where several inputs affect only one source?
I have a custom time input as "hours:minutes:seconds" that should save the time as seconds.
What I have so far:
// calling the custom input with the expected source
<TimeInput source="time_A" />
// in the TimeInput component
<span>
<Field component={NumberInput} name="hh" value={this.state.hh} onChange={this.handleChange} />
<Field component={NumberInput} name="mm" value={this.state.mm} onChange={this.handleChange} />
<Field component={NumberInput} name="ss" value={this.state.ss} onChange={this.handleChange} />
</span>
The handleChange method parses the entered value according to the name of the Field and should update the original source (in this case: "time_A"). That update is what I really can't figure out how to do.
I think the solution would be using the this.props.input.onChange but I must be doing something wrong because my this.props.input is undefined.
Any thoughts?
I am using the below component to capture date and time inputs from the user. You can probably use the same strategy to concatenate all your inputs.
class DateTimePicker extends Component {
constructor(props) {
super(props);
this.state = {
date: null,
time: null
};
}
handleDateInput = (event, date) => {
this.setState({
date: date
})
}
handleTimeInput = (event, time) => {
this.setState({
time: time
})
}
componentDidUpdate(prevProps, prevState) {
const {setSchedule, channel} = this.props
//check for state update before actually calling function otherwise permanent re-renders will happen and page will lock`
//https://stackoverflow.com/questions/44713614/react-code-locking-in-endless-loop-no-while-loops-involved/44713764?noredirect=1#comment76410708_44713764
if (prevState.date !== this.state.date || prevState.time !== this.state.time) {
if (this.state.date && this.state.time) {
setSchedule(convertISTtoUTC(concatenateDateAndTime(this.state.date, this.state.time)), channel)
}
}
}
render() {
//id must be provided to date and time mui components - https://github.com/callemall/material-ui/issues/4659
return (
<div >
</div>
<DatePicker minDate={new Date()} id="datepick" autoOk={true} onChange={this.handleDateInput} />
<TimePicker id="timepick" autoOk={true} pedantic={true} onChange={this.handleTimeInput} />
</div>
</div>
)
}
}
Below is the function to concatenate the date and time and create 1 object from it. You will probably be passing it a DD, MM, YY object and creating the date from it.
export default (date, time) => {
return new Date(
date.getFullYear(),
date.getMonth(),
date.getDate(),
time.getHours(),
time.getMinutes()
)
}
I was thinking about making a simple component with a Select and the list of results that should be displayed.
After reading the code, that seems impossible, because if I change the url, then update is triggered by componentWillReceiveProps, and this method does not check for a change of perPage
Change the prop perPage of the List component does not work either because the List use this prop only if the query does not already contains perPage
Here is an example of what I want to do :
import { List } from "admin-on-rest";
class SourceList extends Component {
constructor(props) {
super(props);
this.state = {
perPage: 10
};
}
render() {
return (
<div>
<Button
onClick={() => {
this.setState({ perPage: 50 });
}}
/>
<List {...props} perPage={this.state.perPage}>
... Here would be the content of the list
</List>
</div>
);
}
}
i am trying to build a Ui component in Reactjs which combines a checkbox and a text input attched to it (instead of a text label) so that if the checkbox is checked , the user can change the text input , and if its unchecked the user will not be able to do so
the final goal is to render outside of the component all of textinputs valus which left checked as a list or as a menu item.
Its should look like this :
Checkbox with Text input
anyone knows how should i do this ? im new to reactjs and got a bit confused how to pass logic between two components(as in here between the checkbox and the text input and between the "combo" component and the outer rendered list) .
thanks in advance !
EDIT1:
well i managed to build the component but i cant make the children call the parent handler (handlerCheckbox , handlerInput)in order to actually make the magic happen.
anything im doing wrong ?
this is the child:
class CheckboxTxtInput extends React.Component{
constructor(props){
super(props);
console.log(props.isChecked)
}
handleCheckboxChild(e) {
this.props.handleCheckbox(e,this.props.id)
}
handleInputChild(e){
this.props.handleInput(e,this.props.id)
}
render(){
return (
<div>
<input type="checkbox" onChange={this.handleCheckboxChild} defaultChecked={this.props.isChecked} />
<input type="text" value={this.props.inputValue} disabled={!this.props.isChecked} onChange={this.handleInputChild}/>
</div>
)
}
}
This is the parent:
export default class Text extends React.Component {
constructor(props) {
super(props);
this.state = {
textItems: [{id:0,inputValue:'text',isChecked:true},{id:1,inputValue:'text',isChecked:true}
,{id:2,inputValue:'text',isChecked:true},{id:3,inputValue:'text',isChecked:true}]
};
this.handleCheckbox = this.handleCheckbox.bind(this);
this.handleInput= this.handleInput.bind(this);
}
handleCheckbox(e,id) {
var stateCopy = Object.assign({}, this.state);
stateCopy.textItems[id].isChecked = e.target.value;
this.setState(stateCopy);
}
handleInput(e,id){
var stateCopy = Object.assign({}, this.state);
stateCopy.textItems[id].text = e.target.value;
this.setState(stateCopy);
}
render () {
return (
<div>
<hr className="divider-long"/>
<UI.sectionDividerLabeled label="Show/Hide Text"/>
<hr className="divider-long"/>
<p>Here you can show\hide your text</p>
<div>
<CheckboxTxtInput id={this.state.textItems[0].id} isChecked={this.state.textItems[0].isChecked}
inputValue={this.state.textItems[0].inputValue} handleInput={this.handleInput}
handleCheckbox={this.handleCheckbox} />
<CheckboxTxtInput id={this.state.textItems[1].id} isChecked={this.state.textItems[1].isChecked}
inputValue={this.state.textItems[1].inputValue} handleInput={this.handleInput}
handleCheckbox={this.handleCheckbox}/>
<CheckboxTxtInput id={this.state.textItems[2].id} isChecked={this.state.textItems[2].isChecked}
inputValue={this.state.textItems[2].inputValue}
handleInput={this.handleInput} handleCheckbox={this.handleCheckbox}/>
<CheckboxTxtInput id={this.state.textItems[3].id} isChecked={this.state.textItems[3].isChecked}
inputValue={this.state.textItems[3].inputValue} handleInput={this.handleInput}
handleCheckbox={this.handleCheckbox}/>
</div>
<RenderText />
</div>
)
}
}
The simplest, React-like way to do this is to have a parent wrapper component - say LabeledCheckbox which contains your Text input and your Checkbox components.
When either of the child components do something, they call a callback provided by the parent, and the parent maintains the state for the two components, passing that state down into the props of both children.
The children in this case would never maintain their own state, instead simply calling callbacks and being prop-fed.
Create one component with checkbox and input field with the state of the checkbox and text field.
And then you can reuse it where you want.
You can do something like this :
class CheckboxTxtInput extends React.Component{
constructor(){
super();
this.state = {
checkbox: false,
inputValue: ""
}
}
handleCheckbox(e){
this.setState({checkbox: e.target.checked})
}
handleInput(e){
this.setState({inputValue: e.target.value})
}
render(){
return (
<div>
<input type="checkbox" onChange={this.handleCheckbox.bind(this)} checked={this.state.checkbox}/>
<input type="text" value={this.state.inputValue} disabled={this.state.checkbox} onChange={this.handleInput.bind(this)}/>
</div>
)
}
}
class Test extends React.Component {
render(){
return (
<div><CheckboxTxtInput /></div>
)
}
}
React.render(<Test />, document.getElementById('container'));
Here is the fiddle.
Hope this helps.