JVCL Help:IJvDataItemsRenderer.DrawItemByIndex

 JVCL Help: IJvDataItemsRenderer.DrawItemByIndex Method

IJvDataItemsRenderer

► IJvDataItemsRenderer Methods

[+] IJvDataItemsRenderer Methods

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Summary

Draw an item given its index.

Pascal

 procedureDrawItemByIndex(ACanvas: TCanvas; varARect: TRect; Index: Integer; State: TProviderDrawStates);

Parameters

Parameters	Description
ACanvas: TCanvas	Canvas to render to. On entry to this method it is assumed the canvas brush, pen and font are initialized to the proper values.
var ARect: TRect	Rectangle in which to draw the item in. On entry it is assumed to be initialized properly (including any indentation for sub items). On exit this will be set to the textual part of the item.
Index: Integer	Index into the items array of the item to render.
State: TProviderDrawStates	Draw states to consider during drawing. This might be needed to determine which image list and/or image index to use.

Description

DrawItemByIndex draws the item specified by the Index parameter. Depending on the implementation the method might first check if the item to draw supports the IJvDataItemRenderer interface; if it does, the drawing is handled by that interface instead.
The caller is responsible for initializing the canvas to the brush, pen and font color and providing an appropriate rectangle (including any indentation for sub items).

See Also

IJvDataItemsRenderer.DrawItem, IJvDataItemsRenderer.MeasureItemByIndex

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