birt javascript method

BIRT report is an open source reporting tool. Using BIRT, you can easily create high-quality reports. In BIRT, we can use JavaScript to customize reports and implement some more complex operations. Let's take a look at the JavaScript methods in BIRT.

1. beforeFactory: Executed before creating a report instance. You can define some global variables or functions in this method to prepare for subsequent report processing.
2. afterFactory: Executed after creating the report instance. Generally, in this method, some adjustments or optimizations can be made to the report to improve the rendering efficiency of the report.
3. beforeRender: Executed before the report is rendered. Usually in this method, some data processing and calculations can be performed on the report, and the calculation results are stored in global variables for subsequent report operations.
4. afterRender: Executed after the report is rendered. You can make some style adjustments or subsequent data processing to the report in this method.
5. onCreate: Executed when creating a report element. For example, if you need to set the column width of the table when creating a table, you can implement this in this method.
6. onRender: Executed when rendering a report element. For example, if you need to make different style adjustments based on the content of a cell when rendering a certain cell, you can implement this in this method.
7. beforeDataSetFill: Executed before the data set is filled. Some parameter settings or filtering operations can be performed on the data set in this method.
8. afterDataSetFill: Executed after the data set is filled. Usually in this method some calculations and processing can be done on the data set, and the calculation results are used in the report.
9. onFetch: Executed every time the data set obtains a piece of data. You can perform some operations on the data in this method, such as encrypting specific fields, etc.
10. onPageStart: Executed when the report renders a certain page. You can hide certain elements of the report or dynamically adjust their positions in this method.
11. onPageEnd: Executed when the report ends rendering a certain page. You can generate some statistics or perform some cleanup operations in this method.

The above are the JavaScript methods commonly used in BIRT. Through these methods, we can perform some advanced report operations and improve the flexibility and customizability of reports.

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