JVCL Help:TJvCustomTimeLine.OnMeasureItem

 JVCL Help: TJvCustomTimeLine.OnMeasureItem Event

TJvCustomTimeLine

► TJvCustomTimeLine Events

[+] TJvCustomTimeLine Events

► TJvCustomTimeLine Methods

[+] TJvCustomTimeLine Methods

► TJvCustomTimeLine Properties

[+] TJvCustomTimeLine Properties

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Summary

Occurs when the application needs to redisplay an item in a variable height owner-draw timeline view.

Pascal

 TJvMeasureTimeItemEvent = procedure (Sender: TObject; Item: TJvTimeItem; varItemHeight: Integer) ofobject;
propertyOnMeasureItem: TJvMeasureTimeItemEvent;

Parameters

Parameters	Description
ItemHeight	Specifies the height of the item.
Item	Specifies item in the control.
Sender	The timeline view control in which an item is about to be drawn.

Description

Use OnMeasureItem to write a handler to measure items to be drawn in a timeline view with a Style property value of lbOwnerDrawVariable.
The ItemHeight parameter should specify the height in pixels that the given item will occupy in the control. The ItemHeight parameter is passed by reference (a var parameter), which initially contains the default height of the item or the height of the item text in the control's font. The handler can set ItemHeight to a value appropriate to the contents of the item, such as the height of a graphical image to be displayed within the item.
After the OnMeasureItem event occurs, the OnDrawItem event occurs, rendering the item with the measured size.

See Also

TJvCustomTimeLine.ItemHeight, TJvCustomTimeLine.OnDrawItem, TJvCustomTimeLine.Style

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