Package org.eclipse.swt.graphics

Class Resource

java.lang.Object
org.eclipse.swt.graphics.Resource
Direct Known Subclasses:
Color, Cursor, Font, GC, Image, Path, Pattern, Region, TextLayout, Transform
public abstract class Resource extends Object
This class is the abstract superclass of all graphics resource objects. Resources created by the application must be disposed.

IMPORTANT: This class is intended to be subclassed only within the SWT implementation. However, it has not been marked final to allow those outside of the SWT development team to implement patched versions of the class in order to get around specific limitations in advance of when those limitations can be addressed by the team. Any class built using subclassing to access the internals of this class will likely fail to compile or run between releases and may be strongly platform specific. Subclassing should not be attempted without an intimate and detailed understanding of the workings of the hierarchy. No support is provided for user-written classes which are implemented as subclasses of this class.

Since:
3.1
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    Resource()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    dispose()
    Disposes of the operating system resources associated with this resource.
    Device
    getDevice()
    Returns the Device where this resource was created.
    abstract boolean
    isDisposed()
    Returns true if the resource has been disposed, and false otherwise.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Resource

      public Resource()

  • Method Details

    • dispose

      public void dispose()
      Disposes of the operating system resources associated with this resource. Applications must dispose of all resources which they allocate. This method does nothing if the resource is already disposed.

    • getDevice

      public Device getDevice()
      Returns the Device where this resource was created.
      Returns:
      Device the device of the receiver
      Since:
      3.2

    • isDisposed

      public abstract boolean isDisposed()
      Returns true if the resource has been disposed, and false otherwise.

      This method gets the dispose state for the resource. When a resource has been disposed, it is an error to invoke any other method (except dispose()) using the resource.

      Returns:
      true when the resource is disposed and false otherwise