Framework:javascriptangularreactvue

Filter Component

Filter components allow you to add your own filter types to ag-Grid. Use them when the provided filters do not meet your requirements.

Filter Component Interface (IFilterComp)

interface IFilterComp {
    // Mandatory methods

    // The init(params) method is called on the filter once. See below for details on the
    // parameters.
    init(params: IFilterParams): void;

    // Returns the DOM element for this filter
    getGui(): HTMLElement;

    // Return true if the filter is active. If active then 1) the grid will show the filter icon in the column
    // header and 2) the filter will be included in the filtering of the data.
    isFilterActive(): boolean;

    // The grid will ask each active filter, in turn, whether each row in the grid passes. If any
    // filter fails, then the row will be excluded from the final set. A params object is supplied
    // containing attributes of node (the rowNode the grid creates that wraps the data) and data (the data
    // object that you provided to the grid for that row).
    doesFilterPass(params: IDoesFilterPassParams): boolean;

    // Gets the filter state. If filter is not active, then should return null/undefined.
    // The grid calls getModel() on all active filters when gridApi.getFilterModel() is called.
    getModel(): any;

    // Restores the filter state. Called by the grid after gridApi.setFilterModel(model) is called.
    // The grid will pass undefined/null to clear the filter.
    setModel(model: any): void;


    // Optional methods

    // Gets called every time the popup is shown, after the GUI returned in
    // getGui is attached to the DOM. If the filter popup is closed and re-opened, this method is
    // called each time the filter is shown. This is useful for any logic that requires attachment
    // before executing, such as putting focus on a particular DOM element. The params has one
    // callback method 'hidePopup', which you can call at any later point to hide the popup - good
    // if you have an 'Apply' button and you want to hide the popup after it is pressed.
    afterGuiAttached?(params?: { hidePopup?: Function }): void;

    // Gets called when new rows are inserted into the grid. If the filter needs to change its
    // state after rows are loaded, it can do it here. For example the set filters uses this
    // to update the list of available values to select from (e.g. 'Ireland', 'UK' etc for
    // Country filter).
    onNewRowsLoaded?(): void;

    // Gets called when the column is destroyed. If your custom filter needs to do
    // any resource cleaning up, do it here. A filter is NOT destroyed when it is
    // made 'not visible', as the GUI is kept to be shown again if the user selects
    // that filter again. The filter is destroyed when the column it is associated with is
    // destroyed, either when new columns are set into the grid, or the grid itself is destroyed.
    destroy?(): void;

    // If floating filters are turned on for the grid, but you have no floating filter
    // configured for this column, then the grid will check for this method. If this
    // method exists, then the grid will provide a read-only floating filter for you
    // and display the results of this method. For example, if your filter is a simple
    // filter with one string input value, you could just return the simple string
    // value here.
    getModelAsString?(model: any): string;
}

IFilterParams

The method init(params) takes a params object with the items listed below. If the user provides params via the colDef.filterParams attribute, these will be additionally added to the params object, overriding items of the same name if a name clash exists.

interface IFilterParams {
    // The column this filter is for
    column: Column;

    // The column definition for the column
    colDef: ColDef;

    // The row model, helpful for looking up data values if needed.
    // If the filter needs to know which rows are a) in the table,
    // b) currently visible (i.e. not already filtered), c) which groups,
    // d) what order - all of this can be read from the rowModel.
    rowModel: IRowModel;

    // A function callback to be called when the filter changes. The
    // grid will then respond by filtering the grid data. The callback
    // takes one optional parameter which, if included, will get merged
    // to the FilterChangedEvent object (useful for passing additional
    // information to anyone listening to this event, however such extra
    // attributes are not used by the grid).
    filterChangedCallback: (additionalEventAttributes?: any) => void;

    // A function callback, to be optionally called, when the filter UI changes.
    // The grid will respond with emitting a FilterModifiedEvent. Apart from
    // emitting the event, the grid takes no further action.
    filterModifiedCallback: () => void;

    // A function callback for the filter to get cell values from the
    // row data. Call with a node to be given the value for that filter's
    // column for that node. The callback takes care of selecting the
    // right column definition and deciding whether to use valueGetter
    // or field etc. This is useful in, for example, creating an Excel
    // style filter, where the filter needs to lookup available values
    // to allow the user to select from.
    valueGetter: (rowNode: RowNode) => any;

    // A function callback, call with a node to be told whether the node
    // passes all filters except the current filter. This is useful if you
    // want to only present to the user values that this filter can filter
    // given the status of the other filters. The set filter uses this to
    // remove from the list, items that are no longer available due to the
    // state of other filters (like Excel type filtering).
    doesRowPassOtherFilter: (rowNode: RowNode) => boolean;

    // The context for this grid. See section on Context
    context: any;

    // The grid API
    api: any;

    // Only if using AngularJS (ie Angular v1), if angularCompileFilters
    // is set to true, then a new child scope is created for each column
    // filter and provided here.
    $scope: any;
}

IDoesFilterPassParams

The method doesFilterPass(params) takes the following as a parameter:

interface IDoesFilterPassParams {
    // The row node in question
    node: RowNode;

    // The data part of the row node in question
    data: any;
}

Associating Floating Filter

If you create your own filter you have two options to get floating filters working for that filter:

  1. You can create your own floating filter.
  2. You can implement the method getModelAsString() in your custom filter. If you implement this method and don't provide a custom floating filter, ag-Grid will automatically provide a read-only version of a floating filter.

If you don't provide either of these two options for your custom filter, the display area for the floating filter will be empty.

Example: Custom Filter

The example below shows two custom filters. The first is on the Athlete column and the second is on the Year column.

Custom Filters Containing a Popup Element

Sometimes you will need to create custom components for your filters that also contain popup elements. This is the case for Date Filter as it pops up a Date Picker. If the library you use anchors the popup element outside of the parent filter, then when you click on it the grid will think you clicked outside of the filter and hence close the column menu.

There are two ways you can get fix this problem:

  • Add a mouse click listener to your floating element and set it to preventDefault(). This way, the click event will not bubble up to the grid.

    Note: This is the best solution, but you can only do this if you are writing the component yourself.
  • Add the ag-custom-component-popup CSS class to your floating element. An example of this usage can be found here: Custom Date Component

React Filtering

It is possible to provide React filters for ag-Grid to use if you are are using the React version of ag-Grid. See registering framework components for how to register framework components.

React Props

The React component will get the 'filter params' as described above as React Props. Therefore you can access all the parameters as React Props.

// React filter Component
class NameFilter extends React.Component {
    constructor(props) {
        super(props);
        // from here you can access any of the props!
        console.log('The field for this filter is ' + props.colDef.field);
    }

    // maybe your filter has a button in it, and when it gets clicked...
    onButtonWasPressed() {
        // all the methods in the props can be called
        this.props.filterChangedCallback();
    }
}

React Methods / Lifecycle

All of the methods in the IFilterComp interface described above are applicable to the React Component with the following exceptions:

  • init() is not used. Instead use the React props passed to your Component.
  • destroy() is not used. Instead use the React componentWillUnmount() method for any cleanup you need to do.
  • getGui() is not used. Instead use normal React magic in your render() method.

After that, all the other methods (onNewRowsLoaded(), getModel(), setModel() etc.) behave the same, so put them directly | onto your React Component.

Accessing the React Component Instance

ag-Grid allows you to get a reference to the filter instances via api.getFilterInstance(colKey, callback). React components | are created asynchronously, so it is necessary to use a callback rather than relying on the return value of this method. If your component is a React component, this will give you a reference to ag-Grid's component which wraps your React component, | just like Russian Dolls. To get to the wrapped React instance of your component, use the getFrameworkComponentInstance() method as follows:

// let's assume a React component as follows
class NameFilter extends React.Component {
    ... // standard filter methods hidden

    // put a custom method on the filter
    myMethod() {
        // does something
    }
}

// later in your app, if you want to execute myMethod()...
laterOnInYourApplicationSomewhere() {
    // get reference to the ag-Grid Filter component on name column
    api.getFilterInstance('name', agGridFilterInstance => {
        // get React instance from the ag-Grid instance
        var reactFilterInstance = agGridFilterInstance.getFrameworkComponentInstance();

        // now we're sucking diesel!!!
        reactFilterInstance.myMethod();
    });
}

Example: Filtering using React Components

Using React Components as a partial text filter in the Name column, illustrating filtering and lifecycle events.

 Example: React Filter Component

Note that in this example we make use of useImperativeHandle for lifecycle methods - please see here for more information.