MBMMapEvents


@interface MBMMapEvents : NSObject

List of supported event types by the map and map snapshotter objects, and event data format specification for each event.

 Simplified diagram for events emitted by the map object.

 ┌─────────────┐               ┌─────────┐                   ┌──────────────┐
 │ Application │               │   Map   │                   │ResourceLoader│
 └──────┬──────┘               └────┬────┘                   └───────┬──────┘
        │                           │                                │
        ├───────setStyleURI────────▶│                                │
        │                           ├───────────get style───────────▶│
        │                           │                                │
        │                           │◀─────────style data────────────┤
        │                           │                                │
        │                           ├─parse style─┐                  │
        │                           │             │                  │
        │      StyleDataLoaded      ◀─────────────┘                  │
        │◀────{"type": "style"}─────┤                                │
        │                           ├─────────get sprite────────────▶│
        │                           │                                │
        │                           │◀────────sprite data────────────┤
        │                           │                                │
        │                           ├──────parse sprite───────┐      │
        │                           │                         │      │
        │      StyleDataLoaded      ◀─────────────────────────┘      │
        │◀───{"type": "sprite"}─────┤                                │
        │                           ├─────get source TileJSON(s)────▶│
        │                           │                                │
        │     SourceDataLoaded      │◀─────parse TileJSON data───────┤
        │◀──{"type": "metadata"}────┤                                │
        │                           │                                │
        │                           │                                │
        │      StyleDataLoaded      │                                │
        │◀───{"type": "sources"}────┤                                │
        │                           ├──────────get tiles────────────▶│
        │                           │                                │
        │◀───────StyleLoaded────────┤                                │
        │                           │                                │
        │     SourceDataLoaded      │◀─────────tile data─────────────┤
        │◀────{"type": "tile"}──────┤                                │
        │                           │                                │
        │                           │                                │
        │◀────RenderFrameStarted────┤                                │
        │                           ├─────render─────┐               │
        │                           │                │               │
        │                           ◀────────────────┘               │
        │◀───RenderFrameFinished────┤                                │
        │                           ├──render, all tiles loaded──┐   │
        │                           │                            │   │
        │                           ◀────────────────────────────┘   │
        │◀────────MapLoaded─────────┤                                │
        │                           │                                │
        │                           │                                │
        │◀─────────MapIdle──────────┤                                │
        │                    ┌ ─── ─┴─ ─── ┐                         │
        │                    │   offline   │                         │
        │                    └ ─── ─┬─ ─── ┘                         │
        │                           │                                │
        ├─────────setCamera────────▶│                                │
        │                           ├───────────get tiles───────────▶│
        │                           │                                │
        │                           │┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─   │
        │◀─────────MapIdle──────────┤   waiting for connectivity  │  │
        │                           ││  Map renders cached data      │
        │                           │ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┘  │
        │                           │                                │


                    
                    
                    MapLoaded

The style has been fully loaded, and the map has rendered all visible tiles.

 Event data format (Object).

Declaration

Objective-C

@property (class, nonatomic, readonly) NSString *MapLoaded;

Swift

class var mapLoaded: String! { get }


                    
                    
                    MapLoadingError

Describes an error that has occured while loading the Map. The type property defines what resource could not be loaded and the message property will contain a descriptive error message. In case of source or tile loading errors, source-id will contain the id of the source failing. In case of tile loading errors, tile-id will contain the id of the tile

 Event data format (Object):
 .
 ├── type - String ("style" | "sprite" | "source" | "tile" | "glyphs")
 ├── message - String
 ├── source-id - optional String
 └── tile-id - optional Object
     ├── z Number (zoom level)
     ├── x Number (x coorinate)
     └── y Number (y coorinate)

Declaration

Objective-C

@property (class, nonatomic, readonly) NSString *MapLoadingError;

Swift

class var mapLoadingError: String! { get }

MapIdle
The map has entered the idle state. The map is in the idle state when there are no ongoing transitions and the map has rendered all requested non-volatile tiles. The event will not be emitted if setUserAnimationInProgress and / or setGestureInProgress is set to true.
```
 Event data format (Object).
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *MapIdle;
Swift

class var mapIdle: String! { get }
StyleDataLoaded
The requested style data has been loaded. The type property defines what kind of style data has been loaded. Event may be emitted synchronously, for example, when setStyleJSON is used to load style.

Based on an event data type property value, following use-cases may be implemented:
- style: Style is parsed, style layer properties could be read and modified, style layers and sources could be added or removed before rendering is started.
- sprite: Style’s sprite sheet is parsed and it is possible to add or update images.
- sources: All sources defined by the style are loaded and their properties could be read and updated if needed.
```
 Event data format (Object):
 .
 └── type - String ("style" | "sprite" | "sources")
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *StyleDataLoaded;
Swift

class var styleDataLoaded: String! { get }
StyleLoaded
The requested style has been fully loaded, including the style, specified sprite and sources’ metadata.
```
 Event data format (Object).
```
Note: The style specified sprite would be marked as loaded even with sprite loading error (An error will be emitted via MapLoadingError). Sprite loading error is not fatal and we don’t want it to block the map rendering, thus this event will still be emitted if style and sources are fully loaded.
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *StyleLoaded;
Swift

class var styleLoaded: String! { get }
StyleImageMissing
A style has a missing image. This event is emitted when the map renders visible tiles and one of the required images is missing in the sprite sheet. Subscriber has to provide the missing image by calling addStyleImage method.
```
 Event data format (Object):
 .
 └── id - String
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *StyleImageMissing;
Swift

class var styleImageMissing: String! { get }


                    
                    
                    StyleImageRemoveUnused

An image added to the style is no longer needed and can be removed using removeStyleImage method.

 Event data format (Object):
 .
 └── id - String

Declaration

Objective-C

@property (class, nonatomic, readonly) NSString *StyleImageRemoveUnused;

Swift

class var styleImageRemoveUnused: String! { get }

SourceDataLoaded
A source data has been loaded. Event may be emitted synchronously in cases when source’s metadata is available when source is added to the style.

The id property defines the source id.

The type property defines if source’s metadata (e.g., TileJSON) or tile has been loaded. The property of metadata value might be useful to identify when particular source’s metadata is loaded, thus all source’s properties are readable and can be updated before map will start requesting data to be rendered.

The loaded property will be set to true if all source’s data required for visible viewport of the map, are loaded. The tile-id property defines the tile id if the type field equals tile.
```
 Event data format (Object):
 .
 ├── id - String
 ├── type - String ("metadata" | "tile")
 ├── loaded - optional Boolean
 └── tile-id - optional Object
     ├── z Number (zoom level)
     ├── x Number (x coorinate)
     └── y Number (y coorinate)
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *SourceDataLoaded;
Swift

class var sourceDataLoaded: String! { get }
SourceAdded
The source has been added with addStyleSource method. The event is emitted synchronously, therefore, it is possible to immediately read added source’s properties.
```
 Event data format (Object):
 .
 └── id - String
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *SourceAdded;
Swift

class var sourceAdded: String! { get }
SourceRemoved
The source has been removed with removeStyleSource method. The event is emitted synchronously, thus, getStyleSources will be in sync when the observer receives the notification.
```
 Event data format (Object):
 .
 └── id - String
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *SourceRemoved;
Swift

class var sourceRemoved: String! { get }


                    
                    
                    RenderFrameStarted

The map started rendering a frame.

Event data format (Object).

Declaration

Objective-C

@property (class, nonatomic, readonly) NSString *RenderFrameStarted;

Swift

class var renderFrameStarted: String! { get }

RenderFrameFinished
The map finished rendering a frame. The render-mode property tells whether the map has all data (full) required to render the visible viewport. The needs-repaint property provides information about ongoing transitions that trigger map repaint. The placement-changed property tells if the symbol placement has been changed in the visible viewport.
```
 Event data format (Object):
 .
 ├── render-mode - String ("partial" | "full")
 ├── needs-repaint - Boolean
 └── placement-changed - Boolean
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *RenderFrameFinished;
Swift

class var renderFrameFinished: String! { get }
CameraChanged
The camera has changed. This event is emitted whenever the visible viewport changes due to the invocation of setSize, setBounds methods or when the camera is modified by calling camera methods. The event is emitted synchronously, so that an updated camera state can be fetched immediately.
```
 Event data format (Object).
```
Declaration
Objective-C

@property (class, nonatomic, readonly) NSString *CameraChanged;
Swift

class var cameraChanged: String! { get }


                    
                    
                    ResourceRequest

The ResourceRequest event allows client to observe resource requests made by a map or map snapshotter objects.

 Event data format (Object):
 .
 ├── data-source - String ("resource-loader" | "network" | "database" | "asset" | "file-system")
 ├── request - Object
 │   ├── url - String
 │   ├── kind - String ("unknown" | "style" | "source" | "tile" | "glyphs" | "sprite-image" | "sprite-json" | "image")
 │   ├── priority - String ("regular" | "low")
 │   └── loading-method - Array ["cache" | "network"]
 ├── response - optional Object
 │   ├── no-content - Boolean
 │   ├── not-modified - Boolean
 │   ├── must-revalidate - Boolean
 │   ├── source - String ("network" | "cache" | "tile-store" | "local-file")
 │   ├── size - Number (size in bytes)
 │   ├── modified - optional String, rfc1123 timestamp
 │   ├── expires - optional String, rfc1123 timestamp
 │   ├── etag - optional String
 │   └── error - optional Object
 │       ├── reason - String ("success" | "not-found" | "server" | "connection" | "rate-limit" | "in-offline-mode" | "other")
 │       └── message - String
 └── cancelled - Boolean

Declaration

Objective-C

@property (class, nonatomic, readonly) NSString *ResourceRequest;

Swift

class var resourceRequest: String! { get }