JVCL Help:TJvTimeLine.OnDrawItem

 JVCL Help: TJvTimeLine.OnDrawItem Event

TJvTimeLine

► TJvTimeLine Events

[+] TJvTimeLine Events

► TJvTimeLine Properties

[+] TJvTimeLine Properties

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Summary

Occurs when an item in an owner-draw timeline view needs to be redisplayed.

Pascal

 propertyOnDrawItem: TJvDrawTimeItemEvent;

Parameters

Parameters	Description
Sender	The timeline view control in which an item is about to be drawn.
Canvas	Provides a drawing surface on which to draw the menu item.
Item	Specifies the item that needs to be redisplayed.
R	Indicates the boundaries (in pixels) of the item on that canvas.

Description

Use OnDrawItem to write a handler for drawing of the items in timeline views with the Style values lbOwnerDrawFixed or lbOwnerDrawVariable. OnDrawItem occurs when the timeline view needs to display an item. OnDrawItem occurs only for owner-draw timeline views. The size of the rectangle that contains the item is determined either by the ItemHeight property or fixed owner-draw timeline views or by the response to the OnMeasureItem event for variable owner-draw timeline views.

See Also

TJvCustomTimeLine.ItemHeight, TJvCustomTimeLine.OnMeasureItem, TJvCustomTimeLine.Style

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