The SDL Component Suite is an industry leading collection of components supporting scientific and engineering computing. Please visit the SDL Web site for more information....


Home ChartPack Scale Events OnBeforeScaleRendered
See also: OnAfterScaleRendered, TScaleRenderedEvent, ConvertToPixelCoords, OnScaleTickDrawn, Events 

OnBeforeScaleRendered

Unit:SDL_scale
Class: TScale
Declaration: property OnBeforeScaleRendered: TScaleRenderedEvent;
{ TScaleRenderedEvent = procedure (Sender: TObject; Canvas: TCanvas) of object; }

The OnBeforeScaleRendered event occurs immediately before the scale will be drawn. Use the property Canvas to draw user specific elements.

Hint: Please note that anything drawn on the canvas will be overwritten by the scale ticks and scale marks. If you want to draw on top of the scale ticks/marks you have to use the OnAfterScaleRendered event.

Example: This method is used in the following example program (see http://www.lohninger.com/examples.html for downloading the code):scalemeter


Last Update: 2008-Okt-29