Package org.eclipse.nebula.widgets.nattable.freeze

Class FreezeHelper

java.lang.Object

org.eclipse.nebula.widgets.nattable.freeze.FreezeHelper

public final class FreezeHelper
extends Object

Helper class to deal with freeze and unfreeze of a NatTable.

This class is intended for internal use only. Consider using the appropriate commands instead of using this helper directly.

See Also:

• FreezeColumnCommand
• FreezeRowCommand
• FreezePositionCommand
• FreezeSelectionCommand
• UnFreezeGridCommand

Method Summary

Modifier and Type	Method	Description
static void	freeze(FreezeLayer freezeLayer, ViewportLayer viewportLayer, PositionCoordinate topLeftPosition, PositionCoordinate bottomRightPosition)	Freezes the grid at the specified position.
static int	getTopLeftColumnPosition(ViewportLayer viewportLayer)	Helper method to retrieve the top left column position on freezing a column.
static void	resetViewport(FreezeLayer freezeLayer, ViewportLayer viewportLayer)	Helper method to reset the origin coordinates of the viewport.
static void	unfreeze(FreezeLayer freezeLayer, ViewportLayer viewportLayer)	Unfreezes the grid at the specified position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

freeze

public static void freeze(FreezeLayer freezeLayer,
 ViewportLayer viewportLayer,
 PositionCoordinate topLeftPosition,
 PositionCoordinate bottomRightPosition)

Freezes the grid at the specified position. This method is for internal use. Consider using the appropriate commands on the NatTable instead to freeze the grid programmatically.

Parameters:

freezeLayer - The FreezeLayer of the grid to perform the freeze action.

viewportLayer - The ViewportLayer of the grid to perform the freeze action.

topLeftPosition - The top left position of the freeze area

bottomRightPosition - The bottom right position of the freeze area

See Also:

• FreezeColumnCommand
• FreezeRowCommand
• FreezePositionCommand
• FreezeSelectionCommand

unfreeze

public static void unfreeze(FreezeLayer freezeLayer,
 ViewportLayer viewportLayer)

Unfreezes the grid at the specified position. This method is for internal use. Consider using the appropriate command on the NatTable instead to unfreeze the grid programmatically.

Parameters:

freezeLayer - The FreezeLayer of the grid to perform the freeze action.

viewportLayer - The ViewportLayer of the grid to perform the freeze action.

See Also:

• UnFreezeGridCommand

resetViewport

public static void resetViewport(FreezeLayer freezeLayer,
 ViewportLayer viewportLayer)

Helper method to reset the origin coordinates of the viewport. Is needed to perform an unfreeze or to override a current frozen state.

Parameters:

freezeLayer - The FreezeLayer of the grid to perform the freeze action.

viewportLayer - The ViewportLayer of the grid to perform the freeze action.

getTopLeftColumnPosition

public static int getTopLeftColumnPosition(ViewportLayer viewportLayer)

Helper method to retrieve the top left column position on freezing a column. Will get the column position on the underlying layer of the ViewportLayer based on the origin x coordinate. For the ResizeColumnHideShowLayer a special handling is performed to get the left most column position in case columns to the left are hidden.

Parameters:

viewportLayer - The ViewportLayer needed for calculating the top left column position.

Returns:

The column position that should be used for the top left coordinate.

Since:

1.6