Package org.eclipse.swt.internal

Class Win32DPIUtils.AutoScaleImageDataProvider

java.lang.Object

org.eclipse.swt.internal.Win32DPIUtils.AutoScaleImageDataProvider

All Implemented Interfaces:

ImageDataProvider

Enclosing class:

Win32DPIUtils

public static final class Win32DPIUtils.AutoScaleImageDataProvider
extends Object
implements ImageDataProvider

AutoScale ImageDataProvider.

Constructor Summary

Constructors

Constructor	Description
AutoScaleImageDataProvider(Device device, ImageData data, int zoom)

Method Summary

Modifier and Type	Method	Description
ImageData	getImageData(int zoom)	Returns the image data for the given zoom level.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AutoScaleImageDataProvider

public AutoScaleImageDataProvider(Device device,
 ImageData data,
 int zoom)

Method Details

getImageData

public ImageData getImageData(int zoom)

Description copied from interface: ImageDataProvider

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.
• Implementations are expected to return ImageData that is linearly scaled with respect to the zoom level. For example, if getImageData(100) returns an image of width w and height h, then getImageData(200) must return an ImageData of width 2 * w and height 2 * h, if a non-null result is returned.

Specified by:

getImageData in interface ImageDataProvider

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 linearly scaled image data for the given zoom level, or null if zoom != 100 and no image is available for the given zoom level.