Package org.eclipse.swt.graphics

Interface ImageDataProvider

  • All Known Implementing Classes:
    CompositeImageDescriptor.CachedImageDataProvider
    public interface ImageDataProvider
    Interface to provide a callback mechanism to get information about images when the application is moved from a low DPI monitor to a high DPI monitor. This provides API which will be called by SWT during the image rendering. This interface needs to be implemented by client code to provide the image information on demand.
    Since:
    3.104

    • Method Detail

      • getImageData

        ImageData getImageData​(int zoom)
        Returns the image data for the given zoom level.

        If no image is available for a particular zoom level, this method should return null. For zoom == 100, returning null is not allowed, and SWT will throw an exception.

        Parameters:
        zoom - The zoom level in % of the standard resolution (which is 1 physical monitor pixel == 1 SWT logical point). Typically 100, 150, or 200.
        Returns:
        the image data, or null if zoom != 100 and no image is available for the given zoom level.
        Since:
        3.104