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Home GeoPack GeoMap Type Declarations and Constants TOnDrawMapDataEvent
See also: CreateAndLoadEmptyMap 

TOnDrawMapDataEvent

Unit:SDL_geomap
Class: none
Declaration: TOnDrawMapDataEvent = procedure (Sender: TObject; MapCanvas: TCanvas; LatLow, LongLow, LatHigh, LongHigh: double; Wid, Hgt: integer);

The TOnDrawMapDataEvent declares the procedure which is called by CreateAndLoadEmptyMap in order to draw additional map features on a blank map. The parameter MapCanvas contains the canvas of the map, the parameters LatLow, LongLow, LatHigh, and LongHigh define the low and high latitudes/longitudes of the map. The parameters Wid and Hgt define the width and height of the map image (in pixels).

Last Update: 2023-Feb-06