Controller"
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| + | The ''controller'' is a Java program that is used to glue UI (view) and Data (model) together. | ||
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| + | For a simple UI, there is no need of controller. For example, the data of a <javadoc>org.zkoss.zul.Listbox</javadoc> could be abstracted by implementing <javadoc type="interface">org.zkoss.zul.ListModel</javadoc>. | ||
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| + | For typical database access, the glue logic (i.e., control) can be handled by a generic feature called [[ZK Developer's Reference/Data Binding|Data Binding]]. In other words, the read and write operations can be handled automatically by a generic Data Binding, and you don't need to write the glue logic at all. | ||
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| + | In this section we will discuss how to implement a custom controller,; also known as a composer. | ||
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| + | =Custom Controller= | ||
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| + | A custom controller is also know as a composer (in ZK). | ||
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| + | To implement a custom controller, you could extend from <javadoc>org.zkoss.zk.ui.util.GenericForwardComposer</javadoc>, or implement <javadoc type="interface">org.zkoss.zk.ui.util.Composer</javadoc> from scratch. Then, specify it in the element it wants to handle in a ZUML document. | ||
=Version History= | =Version History= | ||
Revision as of 07:51, 11 November 2010
The controller is a Java program that is used to glue UI (view) and Data (model) together.
For a simple UI, there is no need of controller. For example, the data of a Listbox could be abstracted by implementing ListModel.
For typical database access, the glue logic (i.e., control) can be handled by a generic feature called Data Binding. In other words, the read and write operations can be handled automatically by a generic Data Binding, and you don't need to write the glue logic at all.
In this section we will discuss how to implement a custom controller,; also known as a composer.
Custom Controller
A custom controller is also know as a composer (in ZK).
To implement a custom controller, you could extend from GenericForwardComposer, or implement Composer from scratch. Then, specify it in the element it wants to handle in a ZUML document.
Version History
Last Update : 2010/11/11
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