Class CellNavigationStrategy

java.lang.Object
org.eclipse.jface.viewers.CellNavigationStrategy

public class CellNavigationStrategy extends Object
This class implementation the strategy how the table is navigated using the keyboard.

Subclasses can implement their custom navigation algorithms

Since:
3.3
  • Constructor Details

    • CellNavigationStrategy

      public CellNavigationStrategy()
  • Method Details

    • isNavigationEvent

      public boolean isNavigationEvent(ColumnViewer viewer, Event event)
      is the given event an event which moves the selection to another cell
      Parameters:
      viewer - the viewer we are working for
      event - the key event
      Returns:
      true if a new cell is searched
    • isCollapseEvent

      public boolean isCollapseEvent(ColumnViewer viewer, ViewerCell cellToCollapse, Event event)
      Parameters:
      viewer - the viewer we are working for
      cellToCollapse - the cell to collapse
      event - the key event
      Returns:
      true if this event triggers collapsing of a node
    • isExpandEvent

      public boolean isExpandEvent(ColumnViewer viewer, ViewerCell cellToExpand, Event event)
      Parameters:
      viewer - the viewer we are working for
      cellToExpand - the cell to expand
      event - the key event
      Returns:
      true if this event triggers expanding of a node
    • expand

      public void expand(ColumnViewer viewer, ViewerCell cellToExpand, Event event)
      Parameters:
      viewer - the viewer working for
      cellToExpand - the cell the user wants to expand
      event - the event triggering the expansion
    • collapse

      public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse, Event event)
      Parameters:
      viewer - the viewer working for
      cellToCollapse - the cell the user wants to collapse
      event - the event triggering the expansion
    • findSelectedCell

      public ViewerCell findSelectedCell(ColumnViewer viewer, ViewerCell currentSelectedCell, Event event)
      Parameters:
      viewer - the viewer we are working for
      currentSelectedCell - the cell currently selected
      event - the key event
      Returns:
      the cell which is highlighted next or null if the default implementation is taken. E.g. it's fairly impossible to react on PAGE_DOWN requests
    • shouldCancelEvent

      public boolean shouldCancelEvent(ColumnViewer viewer, Event event)
      This method is consulted to decide whether an event has to be canceled or not. By default events who collapse/expand tree-nodes are canceled
      Parameters:
      viewer - the viewer working for
      event - the event
      Returns:
      true if the event has to be canceled
    • init

      protected void init()
      This method is called by the framework to initialize this navigation strategy object. Subclasses may extend.