//
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// MATileOverlay.h
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// MapKit_static
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//
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// Created by Li Fei on 11/22/13.
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// Copyright © 2016 Amap. All rights reserved.
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//
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#import "MAConfig.h"
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#if MA_INCLUDE_OVERLAY_TILE
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#import "MAOverlay.h"
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///该类是覆盖在球面墨卡托投影上的图片tiles的数据源
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@interface MATileOverlay : NSObject <MAOverlay>
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///瓦片大小，默认是256x256, 最小支持64*64
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@property (nonatomic, assign) CGSize tileSize;
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///tileOverlay的可见最小Zoom值
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@property NSInteger minimumZ;
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///tileOverlay的可见最大Zoom值
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@property NSInteger maximumZ;
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///同initWithURLTemplate:中的URLTemplate
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@property (readonly) NSString *URLTemplate;
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///暂未开放
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@property (nonatomic) BOOL canReplaceMapContent;
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///区域外接矩形，可用来设定tileOverlay的可渲染区域
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@property (nonatomic) MAMapRect boundingMapRect;
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///是否停止不在显示区域内的瓦片下载，默认NO. since 5.3.0
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@property (nonatomic, assign) BOOL disableOffScreenTileLoading;
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/**
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* @brief 根据指定的URLTemplate生成tileOverlay
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* @param URLTemplate URLTemplate是一个包含"{x}","{y}","{z}","{scale}"的字符串,"{x}","{y}","{z}","{scale}"会被tile path的值所替换，并生成用来加载tile图片数据的URL 。例如 http://server/path?x={x}&y={y}&z={z}&scale={scale}
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* @return 以指定的URLTemplate字符串生成tileOverlay
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*/
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- (id)initWithURLTemplate:(NSString *)URLTemplate;
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@end
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///MATileOverlayPath
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struct MATileOverlayPath{
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NSInteger x; ///< x坐标
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NSInteger y; ///< y坐标
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NSInteger z; ///< 缩放级别
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CGFloat contentScaleFactor; ///< 屏幕的scale factor
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};
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typedef struct MATileOverlayPath MATileOverlayPath;
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///子类可覆盖CustomLoading中的方法来自定义加载MATileOverlay的行为。
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@interface MATileOverlay (CustomLoading)
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/**
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* @brief 以tile path生成URL。用于加载tile,此方法默认填充URLTemplate
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* @param path tile path
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* @return 以tile path生成tileOverlay
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*/
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- (NSURL *)URLForTilePath:(MATileOverlayPath)path;
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/**
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* @brief 加载被请求的tile,并以tile数据或加载tile失败error访问回调block;默认实现为首先用URLForTilePath去获取URL,然后用异步NSURLConnection加载tile
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* @param path tile path
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* @param result 用来传入tile数据或加载tile失败的error访问的回调block
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*/
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- (void)loadTileAtPath:(MATileOverlayPath)path result:(void (^)(NSData *tileData, NSError *error))result;
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/**
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* @brief 取消请求瓦片，当地图显示区域发生变化时，会取消显示区域外的瓦片的下载, 当disableOffScreenTileLoading=YES时会被调用。since 5.3.0
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* @param path tile path
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*/
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- (void)cancelLoadOfTileAtPath:(MATileOverlayPath)path;
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@end
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#endif
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