| /* ==================================================================== |
| 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.AffineTransform; |
| import java.awt.geom.Ellipse2D; |
| import java.awt.geom.Path2D; |
| |
| import org.apache.poi.ooxml.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; |
| |
| public class Ellipse implements GeometryRow { |
| |
| Ellipse _master; |
| |
| // x coordinate of center point |
| Double x; |
| // y coordinate of center point |
| Double y; |
| |
| // x coordinate of first point on ellipse |
| Double a; |
| // y coordinate of first point on ellipse |
| Double b; |
| |
| // x coordinate of second point on ellipse |
| Double c; |
| // y coordinate of second point on ellipse |
| Double d; |
| |
| Boolean deleted; |
| |
| // TODO: support formulas |
| |
| public Ellipse(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 if (cellName.equals("C")) { |
| c = XDGFCell.parseDoubleValue(cell); |
| } else if (cellName.equals("D")) { |
| d = XDGFCell.parseDoubleValue(cell); |
| } else { |
| throw new POIXMLException("Invalid cell '" + cellName |
| + "' in Ellipse row"); |
| } |
| } |
| } |
| |
| public boolean getDel() { |
| if (deleted != null) |
| return deleted; |
| |
| return _master != null && _master.getDel(); |
| } |
| |
| 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; |
| } |
| |
| public Double getC() { |
| return c == null ? _master.c : c; |
| } |
| |
| public Double getD() { |
| return d == null ? _master.d : d; |
| } |
| |
| @Override |
| public void setupMaster(GeometryRow row) { |
| _master = (Ellipse) row; |
| } |
| |
| public Path2D.Double getPath() { |
| |
| if (getDel()) |
| return null; |
| |
| // intentionally shadowing variables here |
| double cx = getX(); // center |
| double cy = getY(); |
| double a = getA(); // left |
| double b = getB(); |
| double c = getC(); // top |
| double d = getD(); |
| |
| // compute radius |
| double rx = Math.hypot(a - cx, b - cy); |
| double ry = Math.hypot(c - cx, d - cy); |
| |
| // compute angle of ellipse |
| double angle = (2.0 * Math.PI + (cy > b ? 1.0 : -1.0) |
| * Math.acos((cx - a) / rx)) |
| % (2.0 * Math.PI); |
| |
| // create ellipse |
| Ellipse2D.Double ellipse = new Ellipse2D.Double(cx - rx, cy - ry, |
| rx * 2, ry * 2); |
| |
| // create a path, rotate it about its center |
| Path2D.Double path = new Path2D.Double(ellipse); |
| |
| AffineTransform tr = new AffineTransform(); |
| tr.rotate(angle, cx, cy); |
| path.transform(tr); |
| |
| return path; |
| } |
| |
| @Override |
| public void addToPath(java.awt.geom.Path2D.Double path, XDGFShape parent) { |
| throw new POIXMLException("Ellipse elements cannot be part of a path"); |
| } |
| } |