User Interaction
To specify when the Popover should be shown and hidden, set the showEvent and hideEvent properties. These properties can accept several events at once as well as an object.
- import React from 'react';
- import 'devextreme/dist/css/dx.common.css';
- import 'devextreme/dist/css/dx.light.css';
- import { Popover } from 'devextreme-react/popover';
- const renderContent = () => {
- return (
- <p>Popover content</p>
- );
- };
- class App extends React.Component {
- render() {
- return (
- <div>
- <img id="image" src="https://url/to/an/image" />
- <Popover
- target="#image"
- showEvent="dxhoverstart"
- hideEvent="dxhoverend"
- contentRender={renderContent}
- />
- </div>
- );
- }
- }
- export default App;
The Popover can also be hidden when a user clicks outside it. To control this behavior of the Popover, use the closeOnOutsideClick property.
- import React from 'react';
- import 'devextreme/dist/css/dx.common.css';
- import 'devextreme/dist/css/dx.light.css';
- import { Popover } from 'devextreme-react/popover';
- const renderContent = () => {
- return (
- <p>Popover content</p>
- );
- };
- class App extends React.Component {
- render() {
- return (
- <div>
- <img id="image" src="https://url/to/an/image" />
- <Popover
- target="#image"
- showEvent="dxhoverstart"
- hideEvent="dxhoverend"
- contentRender={renderContent}
- closeOnOutsideClick={false}
- />
- </div>
- );
- }
- }
- export default App;
API
To show or hide the Popover programmatically, call the show() or hide() method. The same thing can be done using the toggle(showing) method. Pass true or false to this method to show or hide the Popover, respectively. This approach is more typical of jQuery and ASP.NET MVC Controls.
The show() method called without arguments shows the Popover for the target specified beforehand. If you need to change the target once, call the show(target) method.
With Angular, Vue, or React, use a different technique. Bind the visible property of the Popover UI component to a component property. After that, change them, and the Popover will appear or disappear.
- import React from 'react';
- import 'devextreme/dist/css/dx.common.css';
- import 'devextreme/dist/css/dx.light.css';
- import { Popover } from 'devextreme-react/popover';
- import { Button } from 'devextreme-react/button';
- const renderContent = () => {
- return (
- <p>Popover content</p>
- );
- }
- class App extends React.Component {
- constructor(props) {
- super(props);
- this.state = {
- isPopoverVisible: false
- };
- this.showPopover = this.showPopover.bind(this);
- this.hidePopover = this.hidePopover.bind(this);
- }
- showPopover() {
- this.setState({
- isPopoverVisible: true
- });
- }
- hidePopover() {
- this.setState({
- isPopoverVisible: false
- });
- }
- render() {
- return (
- <div>
- <img id="image" src="https://url/to/an/image" />
- <Popover
- target="#image"
- visible={this.state.isPopoverVisible}
- contentRender={renderContent}
- onHiding={this.hidePopover}
- />
- <Button
- text="Show the Popover"
- onClick={this.showPopover}
- />
- <Button
- text="Hide the Popover"
- onClick={this.hidePopover}
- />
- </div>
- );
- }
- }
- export default App;
Events
To execute certain commands before or after the Popover was shown/hidden, handle the showing, shown, hiding or hidden event. If the event handling function is not going to be changed during the lifetime of the UI component, assign it to the corresponding onEventName property when you configure the UI component.
- import React from 'react';
- import 'devextreme/dist/css/dx.common.css';
- import 'devextreme/dist/css/dx.light.css';
- import { Popover } from 'devextreme-react/popover';
- class App extends React.Component {
- onShowing(e) {
- // Handler of the 'showing' event
- }
- onShown(e) {
- // Handler of the 'shown' event
- }
- onHiding(e) {
- // Handler of the 'hiding' event
- }
- onHidden(e) {
- // Handler of the 'hidden' event
- }
- render() {
- return (
- <Popover ...
- onShowing={this.onShowing}
- onShown={this.onShown}
- onHiding={this.onHiding}
- onHidden={this.onHidden}
- />
- );
- }
- }
- export default App;
If you are going to change event handlers at runtime, or if you need to attach several handlers to a single event, subscribe to the events using the on(eventName, eventHandler) method. This approach is more typical of jQuery.
- const hiddenEventHandler1 = function (e) {
- // First handler of the "hidden" event
- };
- const hiddenEventHandler2 = function (e) {
- // Second handler of the "hidden" event
- };
- $("#popoverContainer").dxPopover("instance")
- .on("hidden", hiddenEventHandler1)
- .on("hidden", hiddenEventHandler2);
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
- Popover - Customize the Content
- Popover - Resize and Relocate
- Popover Demos
If you have technical questions, please create a support ticket in the DevExpress Support Center.