| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.xdgf.usermodel.section.geometry; |
| |
| import java.awt.geom.Path2D; |
| |
| import org.apache.poi.POIXMLException; |
| import org.apache.poi.xdgf.usermodel.XDGFCell; |
| import org.apache.poi.xdgf.usermodel.XDGFShape; |
| |
| import com.microsoft.schemas.office.visio.x2012.main.CellType; |
| import com.microsoft.schemas.office.visio.x2012.main.RowType; |
| |
| /** |
| * Contains the x- and y-coordinates of two points on an infinite line. |
| */ |
| public class InfiniteLine implements GeometryRow { |
| |
| InfiniteLine _master = null; |
| |
| // An x-coordinate of a point on the infinite line; paired with y-coordinate |
| // represented by the Y cell. |
| Double x = null; |
| |
| // A y-coordinate of a point on the infinite line; paired with x-coordinate |
| // represented by the X cell. |
| Double y = null; |
| |
| // An x-coordinate of a point on the infinite line; paired with y-coordinate |
| // represented by the B cell. |
| Double a = null; |
| |
| // A y-coordinate of a point on an infinite line; paired with x-coordinate |
| // represented by the A cell. |
| Double b = null; |
| |
| Boolean deleted = null; |
| |
| // TODO: support formulas |
| |
| public InfiniteLine(RowType row) { |
| |
| if (row.isSetDel()) |
| deleted = row.getDel(); |
| |
| for (CellType cell : row.getCellArray()) { |
| String cellName = cell.getN(); |
| |
| if (cellName.equals("X")) { |
| x = XDGFCell.parseDoubleValue(cell); |
| } else if (cellName.equals("Y")) { |
| y = XDGFCell.parseDoubleValue(cell); |
| } else if (cellName.equals("A")) { |
| a = XDGFCell.parseDoubleValue(cell); |
| } else if (cellName.equals("B")) { |
| b = XDGFCell.parseDoubleValue(cell); |
| } else { |
| throw new POIXMLException("Invalid cell '" + cellName |
| + "' in InfiniteLine row"); |
| } |
| } |
| } |
| |
| public boolean getDel() { |
| if (deleted != null) |
| return deleted; |
| |
| if (_master != null) |
| return _master.getDel(); |
| |
| return false; |
| } |
| |
| public Double getX() { |
| return x == null ? _master.x : x; |
| } |
| |
| public Double getY() { |
| return y == null ? _master.y : y; |
| } |
| |
| public Double getA() { |
| return a == null ? _master.a : a; |
| } |
| |
| public Double getB() { |
| return b == null ? _master.b : b; |
| } |
| |
| @Override |
| public void setupMaster(GeometryRow row) { |
| _master = (InfiniteLine) row; |
| } |
| |
| @Override |
| public void addToPath(java.awt.geom.Path2D.Double path, XDGFShape parent) { |
| |
| if (getDel()) |
| return; |
| |
| throw new POIXMLException( |
| "InfiniteLine elements cannot be part of a path"); |
| } |
| |
| // returns this object as a line that extends between the boundaries of |
| // the document |
| public Path2D.Double getPath() { |
| Path2D.Double path = new Path2D.Double(); |
| |
| // this is a bit of a hack, but it works |
| double max_val = 100000; |
| |
| // compute slope.. |
| double x0 = getX(); |
| double y0 = getY(); |
| double x1 = getA(); // second x |
| double y1 = getB(); // second y |
| |
| if (x0 == x1) { |
| path.moveTo(x0, -max_val); |
| path.lineTo(x0, max_val); |
| } else if (y0 == y1) { |
| path.moveTo(-max_val, y0); |
| path.lineTo(max_val, y0); |
| } else { |
| |
| // normal case: compute slope/intercept |
| double m = (y1 - y0) / (x1 - x0); |
| double c = y0 - m * x0; |
| |
| // y = mx + c |
| |
| path.moveTo(max_val, m * max_val + c); |
| path.lineTo(max_val, (max_val - c) / m); |
| } |
| |
| return path; |
| } |
| } |