Bug 77636 Code Formatter Profile Editor should be more fault-tolerant [formatter]
200411022000 The Code Formatter Profile Editor should be more fault-tolerant. Especially on 'White Space' and 'Line Wrapping' tabs, it is very easy to mess things up by changing many settings at once with a single click at the wrong spot. Two possible solutions came to my mind: (1) The dialog could support an undo/redo-stack (via keybindings and/or via additional buttons on the bottom row) (2) The dialog could offer an 'Apply' button, with which the user could save the changes done so far. The current workaround for this is to leave the dialog via OK and then re-enter it, but that's cumbersome when you want to do a pass over all options.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java
settingsPane.setLayoutData(settingsGd);
		
		final Composite previewPane= new Composite(fSashForm, SWT.NONE);
		previewPane.setLayout(createGridLayout(numColumns, true));
		doCreatePreviewPane(previewPane, numColumns);
		final GridData previewGd= new GridData(GridData.FILL_BOTH);
		previewGd.widthHint= fPixelConverter.convertWidthInCharsToPixels(RIGHT_SIDE_WIDTH_HINT_CHARS);
		previewPane.setLayoutData(previewGd);
		
		initializePage();
	
		fSashForm.setWeights(new int [] {3, 3});
		return fSashForm;
	}
	
	/**
	 * This method is called after all controls have been alloated, including the preview. 
	 * It can be used to set the preview text and to create listeners.
	 *
	 */
	protected abstract void initializePage();
	
	/**
	 * Create the left side of the modify dialog. This is meant to be implemented by subclasses. 
	 * @param composite Composite to create in
	 * @param numColumns Number of columns to use
	 */
	protected abstract void doCreatePreferences(Composite composite, int numColumns);
	
	/**