Kexi in Use

Kexi is an integrated data management application and forms part of the KOffice suite. It can be used for creating database schemas, inserting data, performing queries, processing data and producing reports.
Adding Something Trendy

My final requirement at this stage was to have something more graphical: a nice chart to show the trend of fans over time. The report designer allows the creation of charts using the KDChart library from KDAB and is used in the KOffice program KChart. It is quite powerful, allowing you to join chart data to the main report data (called master-child links), but for now, all I needed was a simple, single chart. The chart object expects data in a certain format. There must be two or more columns of data. The first column is used for the labels on the X axis, and all other columns are used as a series in the chart. I started by creating a query with two columns, date in ascending order and total fans, then created a new report. The report itself is not based on any data, so its Data Source was left empty. An empty data source will produce a report with one detail section, providing an area to add a minimal set of items to a report.

In my detail section, I added a chart object from the report designer toolbar and set its data source to the query I had just produced (Figure 11).

Figure 11. Chart Design

As you can see, even at design time, the chart object is able to gather data and draw a preview of the chart. Switching to the data view shows the chart without any of the extra lines and text from the designer (Figure 12).

Figure 12. Chart Report

Hard Copies

When printed, both the tabular report and chart report look as they do in the Data view. When printed using the PDF printer option in KDE, the chart even retains all its detail, as it is not converted to a bitmap, but saved as lines, which makes it completely zoomable!

Saving the tabular report as an HTML document produces two options: saving as a table or using CSS. The table option produces an HTML file where the text from each field in a report is saved as a table cell, and each section is a row. The CSS option uses the <div> tag and tries to create an HTML file that closely resembles the original, allowing text and images to be rendered at arbitrary positions.

The tabular report also exports nicely into an OpenDocument Spreadsheet file for use in either KSpread or (Figure 13).

Figure 13. KSpread Data

As you can see from the image, one problem is that the report's title has taken a cell with the other field headings. This is because it is in the same section, but it easily can be fixed by putting the title into a separate section, such as a Page Header.

Kexi 2 is a powerful tool for developing database applications. Find out what else is possible by giving it a try, and if you can, please contribute more documentation at, or join the team by dropping into #kexi or #koffice on Freenode IRC.

Adam Pigg is a software engineer who, in his free time, contributes to the Kexi and KOffice projects. He's been contributing to KDE in general for around eight years. His remaining time is occupied by his wife, his four great kids and mountain biking. He usually can be found in #kexi on Freenode, where he will do his best to answer any queries.


One Click, Universal Protection: Implementing Centralized Security Policies on Linux Systems

As Linux continues to play an ever increasing role in corporate data centers and institutions, ensuring the integrity and protection of these systems must be a priority. With 60% of the world's websites and an increasing share of organization's mission-critical workloads running on Linux, failing to stop malware and other advanced threats on Linux can increasingly impact an organization's reputation and bottom line.

Learn More

Sponsored by Bit9

Linux Backup and Recovery Webinar

Most companies incorporate backup procedures for critical data, which can be restored quickly if a loss occurs. However, fewer companies are prepared for catastrophic system failures, in which they lose all data, the entire operating system, applications, settings, patches and more, reducing their system(s) to “bare metal.” After all, before data can be restored to a system, there must be a system to restore it to.

In this one hour webinar, learn how to enhance your existing backup strategies for better disaster recovery preparedness using Storix System Backup Administrator (SBAdmin), a highly flexible bare-metal recovery solution for UNIX and Linux systems.

Learn More

Sponsored by Storix