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/TreeViewerRow.java
public Rectangle getBounds(int columnIndex) {
		return item.getBounds(columnIndex);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerRow#getBounds()
	 */
	public Rectangle getBounds() {
		return item.getBounds();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerRow#getColumnCount()
	 */
	public int getColumnCount() {
		return item.getParent().getItemCount();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerRow#getItem()
	 */
	public Item getItem() {
		return item;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerRow#getBackground(int)
	 */
	public Color getBackground(int columnIndex) {
		return item.getBackground(columnIndex);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerRow#getFont(int)
	 */