Accepting Custom Row Widgets

Oct 13, 2025 by miodeya.com 142 views

Overview

In this article, we will explore the process of creating a global widget for an overview page. This widget will be responsible for displaying a list of rows, along with various bulk actions, filters, and columns. We will delve into the details of designing and implementing this widget, including the acceptance of a list of custom row widgets, bulk actions, filters, and columns.

Designing the Widget

Before we begin coding, let's take a step back and design the widget. We want our widget to be flexible and adaptable to different use cases. Here's a high-level overview of the widget's structure:

Rows: The widget will display a list of rows, each representing a single item. These rows will be generated based on the data provided by the user.
Bulk Actions: The widget will accept a list of bulk actions that can be performed on the rows. These actions will be displayed as buttons or links at the top or bottom of the widget.
Filters: The widget will also accept a list of filters that can be applied to the rows. These filters will be displayed as dropdown menus or checkboxes.
Columns: The widget will accept a list of columns that will be displayed for each row. If a row does not have a particular column, an empty cell will be displayed.

Accepting Custom Row Widgets

To make our widget more flexible, we will accept a list of custom row widgets. These row widgets will be responsible for rendering the individual rows. We will use a generic interface to define the contract for these row widgets.

public interface CustomRowWidget {
    String getName();
    String getValue();
}

This interface defines two methods: getName() and getValue(). The getName() method returns the name of the row widget, while the getValue() method returns the value of the row widget.

Accepting Bulk Actions

Next, we will accept a list of bulk actions that can be performed on the rows. We will use a generic interface to define the contract for these bulk actions.

public interface BulkAction {
    String getName();
    void performAction(List<CustomRowWidget> rows);
}

This interface defines two methods: getName() and performAction(). The getName() method returns the name of the bulk action, while the performAction() method performs the action on the provided list of rows.

Accepting Filters

We will also accept a list of filters that can be applied to the rows. We will use a generic interface to define the contract for these filters.

public interface Filter {
    String getName();
    List<CustomRowWidget> applyFilter(List<CustomRowWidget> rows);
}

This interface defines two methods: getName() and applyFilter(). The getName() method returns the name of the filter, while the applyFilter() method applies the filter to the provided list of rows.

Accepting Columns

Finally, we will accept a list of columns that will be displayed for each row. We will use a generic interface to define the contract for these columns.

public interface Column {
    String getName();
    String getValue(CustomRowWidget row);
}

This interface defines two methods: getName() and getValue(). The getName() method returns the name of the column, while the getValue() method returns the value of the column for the provided row.

Implementing the Widget

Now that we have designed the widget and defined the contracts for the custom row widgets, bulk actions, filters, and columns, we can implement the widget. We will use a generic class to implement the widget.

public class GlobalWidget {
    private List<CustomRowWidget> rows;
    private List<BulkAction> bulkActions;
    private List<Filter> filters;
    private List<Column> columns;

    public GlobalWidget(List<CustomRowWidget> rows, List<BulkAction> bulkActions, List<Filter> filters, List<Column> columns) {
        this.rows = rows;
        this.bulkActions = bulkActions;
        this.filters = filters;
        this.columns = columns;
    }

    public void render() {
        // Render the rows
        for (CustomRowWidget row : rows) {
            // Render the row
            System.out.println(row.getName() + ": " + row.getValue());
        }

        // Render the bulk actions
        for (BulkAction bulkAction : bulkActions) {
            // Render the bulk action
            System.out.println(bulkAction.getName());
        }

        // Render the filters
        for (Filter filter : filters) {
            // Render the filter
            System.out.println(filter.getName());
        }

        // Render the columns
        for (Column column : columns) {
            // Render the column
            System.out.println(column.getName());
        }
    }
}

This implementation of the widget uses a generic class to render the rows, bulk actions, filters, and columns.

Example Use Case

Here's an example use case for the global widget:

public class Example {
    public static void main(String[] args) {
        // Create a list of custom row widgets
        List<CustomRowWidget> rows = new ArrayList<>();
        rows.add(new CustomRowWidget("Row 1", "Value 1"));
        rows.add(new CustomRowWidget("Row 2", "Value 2"));

        // Create a list of bulk actions
        List<BulkAction> bulkActions = new ArrayList<>();
        bulkActions.add(new BulkAction("Action 1") {
            @Override
            public void performAction(List<CustomRowWidget> rows) {
                // Perform action 1
            }
        });
        bulkActions.add(new BulkAction("Action 2") {
            @Override
            public void performAction(List<CustomRowWidget> rows) {
                // Perform action 2
            }
        });

        // Create a list of filters
        List<Filter> filters = new ArrayList<>();
        filters.add(new Filter("Filter 1") {
            @Override
            public List<CustomRowWidget> applyFilter(List<CustomRowWidget> rows) {
                // Apply filter 1
                return rows;
            }
        });
        filters.add(new Filter("Filter 2") {
            @Override
            public List<CustomRowWidget> applyFilter(List<CustomRowWidget> rows) {
                // Apply filter 2
                return rows;
            }
        });

        // Create a list of columns
        List<Column> columns = new ArrayList<>();
        columns.add(new Column("Column 1") {
            @Override
            public String getValue(CustomRowWidget row) {
                // Get value for column 1
                return row.getValue();
            }
        });
        columns.add(new Column("Column 2") {
            @Override
            public String getValue(CustomRowWidget row) {
                // Get value for column 2
                return row.getValue();
            }
        });

        // Create a global widget
        GlobalWidget globalWidget = new GlobalWidget(rows, bulkActions, filters, columns);

        // Render the global widget
        globalWidget.render();
    }
}

This example use case demonstrates how to create a list of custom row widgets, bulk actions, filters, and columns, and how to render a global widget using these components.

Conclusion

Q: What is a global widget, and why do I need it?

A: A global widget is a reusable UI component that can be used to display a list of rows, along with various bulk actions, filters, and columns. You need it to create a flexible and adaptable overview page that can be used in different contexts.

Q: What are the key features of a global widget?

A: The key features of a global widget include:

Rows: The ability to display a list of rows, each representing a single item.
Bulk Actions: The ability to perform bulk actions on the rows.
Filters: The ability to apply filters to the rows.
Columns: The ability to display columns for each row.

Q: How do I design a global widget?

A: To design a global widget, you need to consider the following factors:

Flexibility: The ability to adapt to different use cases.
Customizability: The ability to customize the widget to meet specific requirements.
Reusability: The ability to reuse the widget in different contexts.

Q: What are the benefits of using a global widget?

A: The benefits of using a global widget include:

Improved productivity: The ability to quickly create an overview page without having to start from scratch.
Increased flexibility: The ability to adapt the widget to meet changing requirements.
Reduced maintenance: The ability to reuse the widget in different contexts, reducing the need for maintenance.

Q: How do I implement a global widget?

A: To implement a global widget, you need to:

Define the contract: Define the interface for the widget, including the methods and properties.
Implement the widget: Implement the widget using a programming language, such as Java or Python.
Test the widget: Test the widget to ensure it meets the requirements.

Q: What are some common use cases for a global widget?

A: Some common use cases for a global widget include:

Overview pages: Creating an overview page that displays a list of rows, along with various bulk actions, filters, and columns.
Dashboards: Creating a dashboard that displays a list of rows, along with various bulk actions, filters, and columns.
Reports: Creating a report that displays a list of rows, along with various bulk actions, filters, and columns.

Q: How do I customize a global widget?

A: To customize a global widget, you need to:

Extend the widget: Extend the widget to add new features or modify existing ones.
Override the widget: Override the widget to change its behavior or appearance.
Create a new widget: Create a new widget that inherits from the global widget.

Q: What are some best practices for using a global widget?

A: Some best practices for using a global widget include:

Use a consistent design: Use a consistent design for the widget to ensure it looks and feels like other widgets.
Test the widget: Test the widget to ensure it meets the requirements.
Document the widget: Document the widget to ensure others can use it correctly.

Q: How do I troubleshoot issues with a global widget?

A: To troubleshoot issues with a global widget, you need to:

Check the logs: Check the logs to see if there are any errors or warnings.
Use a debugger: Use a debugger to step through the code and identify the issue.
Consult the documentation: Consult the documentation to see if there are any known issues or workarounds.