Composant Delphi / Google Maps / OpenStreetMap / Leaflet / Mappilary / Native Maps 100% Delphi 0% WebBrowser 0% Javascript

Groups

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ECMap
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Installation
TECMap
1. Positioning
2. Map Type
3. Controls
4. Location
5. Places
6. Import / Export
7. Overlays
  1. Markers
    1. Mobile
  2. InfoWindow
  3. Labels
  4. Road
  5. Layers
  6. Pois
8. Groups
9. StreetView
10. EarthView
11. Panoramio
12. DistanceMatrix
TECNativeMap
1. Offline mode
2. Styles
3. Multi view
4. Remote tile server
5. Location
6. Import/Export
7. High resolution
8. Shapes
9. Roads
10. Layers
11. Android
12. iOS
Autres composants
Programming

Contact me to get a test version of the component

Summary

TECMapItemGroup

Groups enable you to manage a set of elements, you can load them, save them, display them, hide them, move them to a single command.

// Delphi map component ECMap

// show group 'group-one'

map.Groups['group-one'].visible := true;

// move group
map.Groups['group-one'].setCenter(43.232951,0.078082);

The elements that you can group are the markers, polylines, polygones, circles, rectangles, groundoverlays and labels

the property Groups[] Returns a TECMapItemGroup, Access groups will create a group if it does not exist.

The groups name is not case sensitive, map.Groups['group'] is equivalent to map.Groups['Group']

// Delphi map component ECMap
var i:integer;

GLines : TECMapItemGroup;
begin

GLines := map.groups['GLines'];
GLines.BeginUpdate;
GLines.clear;

for i:=0 to map.polylines.count - 1 do
GLines.add(map.Polylines[i]);

for i:=0 to map.polygones.count - 1 do
GLines.add(map.Polygones[i]);

GLines.EndUpdate;

TECMapItemGroup

procedure BeginUpdate;

Procedure to use before multiple changes to the group to optimize speed

procedure EndUpdate;

Procedure to use, coupled with BeginUpdate, before multiple changes to the group to optimize speed

procedure Clear;

Empty the Group of its elements, but they are not deleted from the map

procedure Add(const item:TECMapItem);

Adds an element group

procedure AddBounds(const SouthWestLat,SouthWestLng,NorthEastLat,NorthEastLng:double);

Adds all of the TECMapItem in the area bounded by the low point (South West) and high (North East).

procedure Remove(const item:TECMapItem);

Removes a group element, the element is not removed from the map

procedure Delete;

Removes all the elements of the Group and of the map, the elements no longer exist

If you delete a group by map.Groups['Group'].Free the elements are not removed from the map

procedure Show;

Makes visible all of the elements of the Group

procedure Hide;

Cache all of the elements of the Group

function SaveToFile(const filename:string):boolean;

Saves the Group to a text file.

Use the .gpx , .kml and .json to specify a format, otherwise it is the internal format of ECMap that will be used

procedure LoadFromFile(const value: string);

Load the contents of a text file in the internal format of ECMap

Use the .gpx , .kml and .json to specify a format, otherwise it is the internal format of ECMap that will be used

LoadFromFile can download files on internet

function Contains(const lat, Lng: double): boolean;

Indicates whether the point located in the Lat, Lng is situated in the area of the Group

procedure setCenter(const lat,Lng:double);

Moves all of the items in the group so that its centre is located at Lat, Lng

procedure PanToBounds;

Dragging the map so the group is visible.

procedure fitBounds;

Adjusts the view so that all of the elements of the group is visible

property Visible:boolean ;

This property is used by Show / Hide

property MinZoom:byte ;

Minimum zoom to make the group appear, leave 0 to skip the zoom level

property MaxZoom:byte ;

Maximum zoom to make the group appear, leave 0 to skip the zoom level

property OnChange : TNotifyEvent

Raised when the scope of the group changes or the addition of an element

property SouthWestLat: double ;

Specifies the latitude of the left lower corner of the area that includes the Group

property SouthWestLng: double ;

Specifies the longitude of the left lower corner of the area that includes the Group

property NorthEastLat: double ;

Indicates the latitude of the top corner of the area that includes the Group

property NorthEastLng: double ;

Indicates longitude from the top corner of the area that includes the Group

property CenterLat : double ;

Specifies the latitude of the center of the group, use setCentre to modify

property CenterLng : double ;

Specifies the longitude of the center of the group, use setCentre to modify

property Name : string;

property toGPX : string;

Property read/write which gives access to the data of the card in GPX format.

property ToKml : string;

Property in read / write which returns the overlays (all except the Labels) in Kml format

property ToGeoJSON : string

Property in read / write which returns / adds overlays (just the markers, the polylines, polygons, circles, and rectangles) in the GeoJSON format

property ItemsToTxt : string;

Property in read / write which returns / adds overlays in internal text of TECMAP

property Count : integer

Returns the number of item in the Group

property Item[index:integer]:TECMapItem

Returns an item from the Group

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Groups

Summary

TECMapItemGroup

Mots clefs