-Since v3.1.0, the layout can also be specified by renderers. A renderer is a control class that can be instantiated as repeater items, header, etc. A renderer can thus be viewed as an external template (in fact, it can also be non-templated controls). A renderer can be any control class. If implemented with one of the following interfaces, a renderer will be initialized with additional properties relevant to the repeater items: +Since v3.1.0, the layout can also be specified by renderers. A renderer is a control class that can be instantiated as repeater items, header, etc. A renderer can thus be viewed as an external template (in fact, it can also be non-templated controls). A renderer can be any control class. By using item renderers, one can avoid writing long and messy templates. Since a renderer is a class, it also helps reusing templates that previously might be embedded within other templates. If implemented with one of the following interfaces, a renderer will be initialized with additional properties relevant to the repeater items:
+This sample shows how to use "drop-in" item renderers, available since v3.1.0. These renderers come in the PRADO release. They are essentially controls implementing the IDataRenderer interface. Common Web controls, such as TTextBox, TLabel, all implement this interface. When such controls are used item renderers, their Data property is assigned with the row of the data being bound to the repeater item. +
++More often, one needs to customize the layout of repeater items. The sample above relies on OnItemCreated to adjust the appearance of the renderer. Templated item renderers are perferred in this situation, as they allow us to put in more complex layout and content in a repeater item. The following sample reimplements the nested repeater sample using a templated item renderer called RegionDisplay. As we can see, the new code is much easier to understand and maintain. +
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