| /******************************************************************************* |
| * Copyright (c) 2012, 2020 Original authors and others. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Original authors and others - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.nebula.widgets.nattable.freeze.event; |
| |
| import java.util.Collection; |
| |
| import org.eclipse.nebula.widgets.nattable.coordinate.PositionCoordinate; |
| import org.eclipse.nebula.widgets.nattable.coordinate.Range; |
| import org.eclipse.nebula.widgets.nattable.freeze.FreezeLayer; |
| import org.eclipse.nebula.widgets.nattable.layer.event.ILayerEventHandler; |
| import org.eclipse.nebula.widgets.nattable.layer.event.IStructuralChangeEvent; |
| import org.eclipse.nebula.widgets.nattable.layer.event.StructuralDiff; |
| import org.eclipse.nebula.widgets.nattable.layer.event.StructuralDiff.DiffTypeEnum; |
| |
| public class FreezeEventHandler implements |
| ILayerEventHandler<IStructuralChangeEvent> { |
| |
| private final FreezeLayer freezeLayer; |
| |
| public FreezeEventHandler(FreezeLayer freezeLayer) { |
| this.freezeLayer = freezeLayer; |
| } |
| |
| @Override |
| public Class<IStructuralChangeEvent> getLayerEventClass() { |
| return IStructuralChangeEvent.class; |
| } |
| |
| @Override |
| public void handleLayerEvent(IStructuralChangeEvent event) { |
| PositionCoordinate topLeftPosition = this.freezeLayer.getTopLeftPosition(); |
| PositionCoordinate bottomRightPosition = this.freezeLayer |
| .getBottomRightPosition(); |
| |
| Collection<StructuralDiff> columnDiffs = event.getColumnDiffs(); |
| if (columnDiffs != null) { |
| int leftOffset = 0; |
| int rightOffset = 0; |
| |
| for (StructuralDiff columnDiff : columnDiffs) { |
| DiffTypeEnum diffType = columnDiff.getDiffType(); |
| if (diffType == DiffTypeEnum.ADD) { |
| Range afterPositionRange = columnDiff |
| .getAfterPositionRange(); |
| if (afterPositionRange.start < topLeftPosition.columnPosition) { |
| leftOffset += afterPositionRange.size(); |
| } |
| if (afterPositionRange.start <= bottomRightPosition.columnPosition) { |
| rightOffset += afterPositionRange.size(); |
| } |
| } else if (diffType == DiffTypeEnum.DELETE) { |
| Range beforePositionRange = columnDiff |
| .getBeforePositionRange(); |
| if (beforePositionRange.start < topLeftPosition.columnPosition) { |
| leftOffset -= Math.min(beforePositionRange.end, |
| topLeftPosition.columnPosition + 1) |
| - beforePositionRange.start; |
| } |
| if (beforePositionRange.start <= bottomRightPosition.columnPosition) { |
| rightOffset -= Math.min(beforePositionRange.end, |
| bottomRightPosition.columnPosition + 1) |
| - beforePositionRange.start; |
| } |
| } |
| } |
| |
| topLeftPosition.columnPosition += leftOffset; |
| bottomRightPosition.columnPosition += rightOffset; |
| } |
| |
| Collection<StructuralDiff> rowDiffs = event.getRowDiffs(); |
| if (rowDiffs != null) { |
| int leftOffset = 0; |
| int rightOffset = 0; |
| |
| for (StructuralDiff rowDiff : rowDiffs) { |
| DiffTypeEnum diffType = rowDiff.getDiffType(); |
| if (diffType == DiffTypeEnum.ADD) { |
| Range afterPositionRange = rowDiff |
| .getAfterPositionRange(); |
| if (afterPositionRange.start < topLeftPosition.rowPosition) { |
| leftOffset += afterPositionRange.size(); |
| } |
| if (afterPositionRange.start <= bottomRightPosition.rowPosition) { |
| rightOffset += afterPositionRange.size(); |
| } |
| } else if (diffType == DiffTypeEnum.DELETE) { |
| Range beforePositionRange = rowDiff |
| .getBeforePositionRange(); |
| if (beforePositionRange.start < topLeftPosition.rowPosition) { |
| leftOffset -= Math.min(beforePositionRange.end, |
| topLeftPosition.rowPosition + 1) |
| - beforePositionRange.start; |
| } |
| if (beforePositionRange.start <= bottomRightPosition.rowPosition) { |
| rightOffset -= Math.min(beforePositionRange.end, |
| bottomRightPosition.rowPosition + 1) |
| - beforePositionRange.start; |
| } |
| } |
| } |
| |
| topLeftPosition.rowPosition += leftOffset; |
| bottomRightPosition.rowPosition += rightOffset; |
| } |
| } |
| |
| } |