GLMapImageGroupDataSource

Objective-C

@protocol GLMapImageGroupDataSource

Swift

protocol GLMapImageGroupDataSource

GLMapImageGroupDataSource is a callback that provide infromation images.

Warning

Do not edit image group while it is updated

  • Called at start of updating image group.

    Declaration

    Objective-C

    - (void)startUpdate;

    Swift

    func startUpdate()

  • Called at end of uparing image group

    Declaration

    Objective-C

    - (void)endUpdate;

    Swift

    func endUpdate()

  • Returns number of unique images

    Declaration

    Objective-C

    - (NSInteger)getVariantsCount;

    Swift

    func getVariantsCount() -> Int

  • Returns image.

    Declaration

    Objective-C

    - (PlatformImage *_Nonnull)getVariant:(NSInteger)index
                               offset:(CGPoint *_Nonnull)offset;

    Swift

    func getVariant(_ index: Int, offset: UnsafeMutablePointer<CGPoint>) -> NSImage

    Parameters

    index

    index of image in range [0..getVariantsCount)
    offset

    offset of image in points

  • Returns number of images to draw

    Declaration

    Objective-C

    - (NSInteger)getImagesCount;

    Swift

    func getImagesCount() -> Int

  • Fills infromation for image

    Declaration

    Objective-C

    - (void)getImageInfo:(NSInteger)index
            vairiant:(uint32_t *_Nonnull)variant
            position:(GLMapPoint *_Nonnull)position;

    Swift

    func getImageInfo(_ index: Int, vairiant variant: UnsafeMutablePointer<UInt32>, position: UnsafeMutablePointer<GLMapPoint>)

    Parameters

    index

    index of image in range [0..getImagesCount)
    variant

    index of image to draw in range [0..getVarriantsCount)
    position

    position where to draw image