Controller"
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The ''controller'' is a Java program that is used to glue UI (view) and Data (model) together. | The ''controller'' is a Java program that is used to glue UI (view) and Data (model) together. | ||
| − | + | A simple UI does not require any controllers. 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>. | |
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 create, read, update and delete operations (CRUD) can be handled automatically by a generic Data Binding, and you don't need to write the glue logic at all. | 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 create, read, update and delete operations (CRUD) can be handled automatically by a generic Data Binding, and you don't need to write the glue logic at all. | ||
Revision as of 07:17, 22 July 2011
Overview
The controller is a Java program that is used to glue UI (view) and Data (model) together.
A simple UI does not require any controllers. 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 create, read, update and delete operations (CRUD) 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 (which is called a composer in ZK terminology).
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