Angular PivotGrid - stateStoring

State storing enables the UI component to save applied settings and restore them the next time the UI component is loaded. Assign true to the stateStoring.enabled property to enable this functionality.

The state is saved with a specified storage key.

State storing saves the following properties:

To specify the time in milliseconds between automatic state saves, set the savingTimeout property. To specify the lifetime of the saved state, set the storage type.

Use the PivotGridDataSource's state method to manage the PivotGrid's state at runtime.

View Demo

Use the customSave and customLoad functions to manually implement state storing: in customSave, save the state to a custom storage; in customLoad, load it. You can also adjust the state in both functions. See an example in the customSave topic.

Use the customSave and customLoad functions to manually implement state storing: in customSave, save the state to a custom storage; in customLoad, load it. You can also adjust the state in both functions.

In the following code, the state is saved and loaded from a remote storage:

function sendStorageRequest (storageKey, dataType, method, data) {
    var deferred = new $.Deferred;
    var storageRequestSettings = {
        url: "https://url/to/your/storage/" + JSON.stringify(storageKey),
        headers: {
            "Accept" : "text/html",
            "Content-Type" : "text/html"
        },
        method: method,
        dataType: dataType,
        success: function (data) {
            deferred.resolve(data);
        },
        fail: function (error) {
            deferred.reject();
        }
    };
    if (data) {
        storageRequestSettings.data = JSON.stringify(data);
    }
    $.ajax(storageRequestSettings);
    return deferred.promise();
}
$(function() {
    $("#pivotGridContainer").dxPivotGrid({
        // ...
        stateStoring: {
            enabled: true,
            type: "custom",
            customLoad: function () {
                return sendStorageRequest("storageKey", "json", "GET");
            },
            customSave: function (state) {
                sendStorageRequest("storageKey", "text", "PUT", state);
            }
        },
    });
})

import { HttpClient, HttpClientModule, HttpHeaders, HttpRequest } from "@angular/common/http";
import { DxPivotGridModule } from "devextreme-angular";
import "rxjs/add/operator/toPromise";
import "rxjs/add/operator/catch";
// ...
export class AppComponent {
    constructor(private httpClient: HttpClient) { }

    sendStorageRequest = (storageKey, dataType, method, data) => {
        let url  = "https://url/to/your/storage/" + JSON.stringify(storageKey);
        let req: HttpRequest = new HttpRequest(method, url, {
            headers: new HttpHeaders({
                "Accept": "text/html",
                "Content-Type": "text/html"
            }),
            responseType: dataType
        });
        if (data) {
            req.body = JSON.stringify(data);
        }
        return httpClient.request(req)
            .toPromise();
    }

    loadState = () => {
        return this.sendStorageRequest("storageKey", "json", "Get");
    } 

    saveState = (state) => {
        this.sendStorageRequest("storageKey", "text", "Put", state);
    }
}
@NgModule({
    imports: [
        // ...
        DxPivotGridModule,
        HttpClientModule
    ],
    // ...
})

<dx-pivot-grid ...>
    <dxo-state-storing 
        [enabled]="true" 
        type="custom" 
        [customLoad]="loadState"
        [customSave]="saveState">
    </dxo-state-storing>
</dx-pivot-grid>

When using the PivotGrid UI component, a number of settings may be changed at runtime. When these changes are being made one after another, there is no need to save the grid state after each change. Instead, specify the savingTimeout property, which dictates how much time should pass between the last change of the state and the operation of saving this state.

When state storing is enabled, PivotGrid stores data about its state on the client side. The type of storage that will suit your needs best depends on the supposed lifetime of user-specified pivot grid settings, such as fields configuration, sorting, filters, expanded headers, etc. If these settings should be destroyed after a browser session ends, use a session storage. If it is important to keep them for a longer time, choose a local storage.

If you want to define specific actions on saving and loading a state, use a custom type of storage. For this purpose, specify the customSave and customLoad callback functions.