Bug 16938 DCR: Class File Editor should scroll more naturally
20020521 (F1) (This may not be a debug PR - I wasn't sure). - put a breakpoint in a java file, right before a System.out.println statement - debug to the breakpoint - step in to the println call (I happened to go in to StringBuffer first - all that matters is that you do not have the source for the class you just stepped into) - a Class File Editor opens - click on the scrollbar's down arrow Problem: the editor only scrolls one pixel at a time. It should scroll one line at a time when you click on the arrows. - click on the scrollbar's background to scroll a page at a time Problem: the editor only scrolls about a line at a time when it should be scrolling a page at a time. Grabbing the thumb and scrolling with that works well. So the workaround, if the user wants to scroll through the Class File editor, is to always use the thumb.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditor.java
} else {
		
			if (fSourceAttachmentForm != null) {
				fSourceAttachmentForm.dispose();
				fSourceAttachmentForm= null;
				fStackLayout.topControl= fViewerComposite;		
				fParent.layout();
			}
		}		
	}	
	/*
	 * @see ClassFileDocumentProvider.InputChangeListener#inputChanged(IClassFileEditorInput)
	 */
	public void inputChanged(final IClassFileEditorInput input) {
		if (input != null && input.equals(getEditorInput())) {	
			ISourceViewer viewer= getSourceViewer();
			if (viewer != null) {
				StyledText textWidget= viewer.getTextWidget();
				if (textWidget != null && !textWidget.isDisposed()) {
					textWidget.getDisplay().asyncExec(new Runnable() {
						public void run() {
							setInput(input);
						}
					});
				}
			}						
		}
	}
}