JVCL Help:IJvDataItemRenderer

 JVCL Help: IJvDataItemRenderer Interface

► IJvDataItemRenderer Methods

[+] IJvDataItemRenderer Methods

JVCL Interfaces

► JvDataProviderIntf.pas Interfaces

[+] JvDataProviderIntf.pas Interfaces

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Class Hierarchy

IJvDataItemRenderer

    TJvBaseDataItemRenderer

run\JvDataProviderIntf.pas

Summary

Data Item support interface that handles rendering and measuring itself.

run\JvDataProviderIntf.pas

Pascal

 run\JvDataProviderIntf.pas

 IJvDataItemRenderer = interface;

Description

IJvDataItemRenderer is a supporting interface for IJvDataItem that adds rendering and measuring capabilities to an item.
Consumers generally handle rendering/measuring in the following way:

• Check if the item supports the IJvDataItemRenderer interface. If it does use it to perform the rendering/measuring.
• Check for the closest IJvDataItemsRenderer interface (the direct owning IJvDataItems list or anyof the lists in its parent chain). If it finds one use it to perform the rendering/measuring.
• Handle the rendering at the consumer side. This means all items are considered equal and usually only IJvDataItemText and optionally IJvDataItemImage (and the corresponding IJvDataItemsImages) are used. The entire rendering/measuring is then consumer (control) dependent and the provider tree may no longer look uniform in different consumers/clients.

run\JvDataProviderIntf.pas

See Also

IJvDataItem, IJvDataItemsRenderer

run\JvDataProviderIntf.pas

About

Navigation

▼ IJvDataItemRenderer

  IJvDataItemRenderer

  IJvDataItemRenderer.Draw

  IJvDataItemRenderer.Measure

run\JvDataProviderIntf.pas

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