| /******************************************************************************* |
| * Copyright (c) 2005, 2012 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.bpel.ui.figures; |
| |
| /** |
| * This is a hack to get the vertical connection lines perfectly |
| * straight. Relies on assumption |
| * that vertical lines are sometimes crooked by 1 pixel depending |
| * on the magnification. |
| */ |
| public class ConnectionCoordHistory { |
| private static ConnectionCoordHistory instance; |
| |
| // x-coord of 1st anchor in aligned vertical parts |
| private static int firstX = 0; |
| |
| // y-coord of 1st anchor in aligned horizontal parts |
| private static int firstY = 0; |
| |
| private ConnectionCoordHistory(){} |
| |
| public static ConnectionCoordHistory getInstance() { |
| if (instance == null) instance = new ConnectionCoordHistory(); |
| return instance; |
| } |
| |
| public int adjustX(int x){ |
| if (firstX ==0 ){ |
| firstX = x; |
| return x; |
| }else if (Math.abs(firstX - x) > 2){ |
| /* assume any anchor point outside 2px of firstX means |
| * that the anchor is at the start of a new container |
| */ |
| firstX = x; |
| return x; |
| } |
| return firstX; |
| } |
| |
| public int adjustY(int y){ |
| if (firstY ==0 ){ |
| firstY = y; |
| return y; |
| }else if (Math.abs(firstY - y) > 2){ |
| /* assume any anchor point outside 2px of firstY means |
| * that the anchor is at the start of a new container |
| */ |
| firstY = y; |
| return y; |
| } |
| return firstY; |
| } |
| } |
