JVCL Help:TJvCustomItemViewer.DrawItem

 JVCL Help: TJvCustomItemViewer.DrawItem Method

TJvCustomItemViewer

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[+] TJvCustomItemViewer Methods

► TJvCustomItemViewer Properties

[+] TJvCustomItemViewer Properties

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Summary

Called when an item needs to be visually updated.

Pascal

 procedureDrawItem(Index: Integer; State: TCustomDrawState; Canvas: TCanvas; ItemRect: TRect; TextRect: TRect); virtual;

Parameters

Parameters	Description
Index: Integer	The index of the item in the Items array.
State: TCustomDrawState	The current state of the item to draw.
Canvas: TCanvas	The canvas to draw on.
ItemRect: TRect	The rect of the item to draw excluding TextRect.
TextRect: TRect	The rect of the text (if any) to draw. This rect is adjusted according to Options.Layout and Options.Alignment.

Description

DrawItem is called for each item when it needs to be redrawn. Override this method in a descendant class to change the way items are drawn. Depending on the value of Options.LazyRead, DrawItem is called differently. If LazyRead is true, DrawItem is called for each visible item. If LazyRead is false, DrawItem is called for all items.

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