OSM Map control

Class TChildObjList

Description
Hierarchy
Fields
Methods
Properties

Unit

OSM.MapControl

Declaration

type TChildObjList<T:class> = class(TObject)

Description

Base wrapper for list of map's child objects (mapmarks, tracks). List is linked to map and controls redrawing when an item is added or removed. List owns added objects and disposes them on delete.

Hierarchy

Overview

Methods

Public constructor Create(Map: TMapControl);
Public destructor Destroy; override;
Public procedure BeginUpdate;
Public procedure EndUpdate;
Public function GetEnumerator: TObjectList<T>.TEnumerator; inline;
Public function Get(Index: Integer): T; inline;
Public function Add(Item: T): T;
Public procedure Delete(Ind: Integer); overload;
Public procedure Delete(Item: T); overload;
Public procedure Sort;
Public function Count: Integer; inline;
Public procedure Clear;

Properties

Public property OnItemNotify: TOnItemNotify<T> read FOnItemNotify write FOnItemNotify;
Public property Items[Index: Integer]: T read Get;

Description

Methods

Public constructor Create(Map: TMapControl);

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Public destructor Destroy; override;

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Public procedure BeginUpdate;

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Public procedure EndUpdate;

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Public function GetEnumerator: TObjectList<T>.TEnumerator; inline;

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Public function Get(Index: Integer): T; inline;

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Public function Add(Item: T): T;

Add an item

Public procedure Delete(Ind: Integer); overload;

Remove item by index

Public procedure Delete(Item: T); overload;

Remove given item

Public procedure Sort;

Re-sort the list after modification of items' properties

Public function Count: Integer; inline;

Return count of elements in list

Public procedure Clear;

Remove all elements

Properties

Public property OnItemNotify: TOnItemNotify<T> read FOnItemNotify write FOnItemNotify;

Assigning a handler for this event allows implementing custom init, disposal of allocated memory and so on

Public property Items[Index: Integer]: T read Get;

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