| /******************************************************************************* |
| * Copyright (c) 2012, 2016 Original authors and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Original authors and others - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.nebula.widgets.nattable.freeze.command; |
| |
| import org.eclipse.nebula.widgets.nattable.command.AbstractLayerCommandHandler; |
| import org.eclipse.nebula.widgets.nattable.coordinate.PositionCoordinate; |
| import org.eclipse.nebula.widgets.nattable.freeze.FreezeHelper; |
| import org.eclipse.nebula.widgets.nattable.freeze.FreezeLayer; |
| import org.eclipse.nebula.widgets.nattable.selection.SelectionLayer; |
| import org.eclipse.nebula.widgets.nattable.viewport.ViewportLayer; |
| |
| public class FreezeCommandHandler extends AbstractLayerCommandHandler<IFreezeCommand> { |
| |
| protected final FreezeLayer freezeLayer; |
| |
| protected final ViewportLayer viewportLayer; |
| |
| protected final SelectionLayer selectionLayer; |
| |
| public FreezeCommandHandler(FreezeLayer freezeLayer, ViewportLayer viewportLayer, SelectionLayer selectionLayer) { |
| this.freezeLayer = freezeLayer; |
| this.viewportLayer = viewportLayer; |
| this.selectionLayer = selectionLayer; |
| } |
| |
| @Override |
| public Class<IFreezeCommand> getCommandClass() { |
| return IFreezeCommand.class; |
| } |
| |
| @Override |
| public boolean doCommand(IFreezeCommand command) { |
| |
| if (command instanceof FreezeColumnCommand) { |
| // freeze for a whole column |
| FreezeColumnCommand freezeColumnCommand = (FreezeColumnCommand) command; |
| IFreezeCoordinatesProvider coordinatesProvider = new FreezeColumnStrategy( |
| this.freezeLayer, this.viewportLayer, freezeColumnCommand.getColumnPosition()); |
| handleFreezeCommand(coordinatesProvider, |
| freezeColumnCommand.isToggle(), command.isOverrideFreeze()); |
| return true; |
| } else if (command instanceof FreezeRowCommand) { |
| // freeze for a whole row |
| FreezeRowCommand freezeRowCommand = (FreezeRowCommand) command; |
| IFreezeCoordinatesProvider coordinatesProvider = new FreezeRowStrategy( |
| this.freezeLayer, this.viewportLayer, freezeRowCommand.getRowPosition()); |
| handleFreezeCommand(coordinatesProvider, |
| freezeRowCommand.isToggle(), command.isOverrideFreeze()); |
| return true; |
| } else if (command instanceof FreezePositionCommand) { |
| // freeze for a given position |
| FreezePositionCommand freezePositionCommand = (FreezePositionCommand) command; |
| IFreezeCoordinatesProvider coordinatesProvider = new FreezePositionStrategy( |
| this.freezeLayer, this.viewportLayer, freezePositionCommand.getColumnPosition(), |
| freezePositionCommand.getRowPosition()); |
| handleFreezeCommand(coordinatesProvider, |
| freezePositionCommand.isToggle(), |
| command.isOverrideFreeze()); |
| return true; |
| } else if (command instanceof FreezeSelectionCommand) { |
| // freeze at the current selection anchor |
| IFreezeCoordinatesProvider coordinatesProvider = new FreezeSelectionStrategy( |
| this.freezeLayer, this.viewportLayer, this.selectionLayer); |
| handleFreezeCommand(coordinatesProvider, command.isToggle(), |
| command.isOverrideFreeze()); |
| return true; |
| } else if (command instanceof UnFreezeGridCommand) { |
| // unfreeze |
| handleUnfreeze(); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Performs freeze actions dependent on the coordinates specified by the |
| * given {@link IFreezeCoordinatesProvider} and the configuration flags. If |
| * a freeze state is already active it is checked if this state should be |
| * overriden or toggled. Otherwise the freeze state is applied. |
| * |
| * @param coordinatesProvider |
| * The {@link IFreezeCoordinatesProvider} to retrieve the freeze |
| * coordinates from |
| * @param toggle |
| * whether to unfreeze if the freeze layer is already in a frozen |
| * state |
| * @param override |
| * whether to override a current frozen state. |
| */ |
| protected void handleFreezeCommand( |
| IFreezeCoordinatesProvider coordinatesProvider, boolean toggle, boolean override) { |
| |
| if (!this.freezeLayer.isFrozen() || override) { |
| // if we are in a frozen state and be configured to override, reset |
| // the viewport first |
| if (this.freezeLayer.isFrozen() && override) { |
| FreezeHelper.resetViewport(this.freezeLayer, this.viewportLayer); |
| } |
| |
| final PositionCoordinate topLeftPosition = coordinatesProvider.getTopLeftPosition(); |
| final PositionCoordinate bottomRightPosition = coordinatesProvider.getBottomRightPosition(); |
| |
| FreezeHelper.freeze(this.freezeLayer, this.viewportLayer, topLeftPosition, bottomRightPosition); |
| } else if (toggle) { |
| // if frozen and toggle = true |
| handleUnfreeze(); |
| } |
| } |
| |
| /** |
| * Unfreeze a current frozen state. |
| */ |
| protected void handleUnfreeze() { |
| FreezeHelper.unfreeze(this.freezeLayer, this.viewportLayer); |
| } |
| |
| } |