Bug 167325 [Viewers]ViewerCell and ViewerRow should provide API to find neighbors
This is a very important feature if we want provide keyboard features in tables and trees and the current EditingSupport has TODO items to make this work in a clear way. I'd propose the following new API functions for ViewerCell: - ViewerCell#getCellLeft() - ViewerCell#getCellRight() - ViewerCell#getCellTop() - ViewerCell#getCellBottom() - ViewerRow#getRowTop() - ViewerRow#getRowBottom() What I'm not 100% sure is if we should provide functions to navigate Tree-Structures: - ViewerCell#getCellTop(boolean samelevel) - ViewerCell#getCellBottom(boolean samelevel) - ViewerRow#getRowTop(boolean samelevel) - ViewerRow#getRowBottom(boolean samelevel)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerRow.java
*/
	public abstract Font getFont(int columnIndex);
	/**
	 * Set the {@link Font} at the columnIndex.
	 * 
	 * @param columnIndex
	 * @param font
	 */
	public abstract void setFont(int columnIndex, Font font);
	/**
	 * Get the ViewerCell at point.
	 * 
	 * @param point
	 * @return {@link ViewerCell}
	 */
	public ViewerCell getCell(Point point) {
		int index = getColumnIndex(point);
		return getCell(index);
	}
	/**
	 * Get the columnIndex of the point.
	 * 
	 * @param point
	 * @return int or -1 if it cannot be found.
	 */
	public int getColumnIndex(Point point) {
		int count = getColumnCount();
		
		
		if( count == 0 ) {