poi/src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestXSLFConnectorShape.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.xslf.usermodel;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;

import java.awt.Color;
import java.awt.geom.Rectangle2D;

import org.apache.poi.sl.usermodel.LineDecoration.DecorationShape;
import org.apache.poi.sl.usermodel.LineDecoration.DecorationSize;
import org.apache.poi.sl.usermodel.ShapeType;
import org.junit.Test;
import org.openxmlformats.schemas.drawingml.x2006.main.CTConnection;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualConnectorProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.STLineEndLength;
import org.openxmlformats.schemas.drawingml.x2006.main.STLineEndType;
import org.openxmlformats.schemas.drawingml.x2006.main.STLineEndWidth;
import org.openxmlformats.schemas.drawingml.x2006.main.STShapeType;
import org.openxmlformats.schemas.presentationml.x2006.main.CTConnector;

/**
 * @author Yegor Kozlov
 */
public class TestXSLFConnectorShape {

    @Test
    public void testLineDecorations() {
        XMLSlideShow ppt = new XMLSlideShow();
        XSLFSlide slide = ppt.createSlide();

        XSLFConnectorShape shape = slide.createConnector();
        assertEquals(1, slide.getShapes().size());

        assertFalse(shape.getSpPr().getLn().isSetHeadEnd());
        assertFalse(shape.getSpPr().getLn().isSetTailEnd());

        // line decorations
        assertEquals(DecorationShape.NONE, shape.getLineHeadDecoration());
        assertEquals(DecorationShape.NONE, shape.getLineTailDecoration());
        shape.setLineHeadDecoration(null);
        shape.setLineTailDecoration(null);
        assertEquals(DecorationShape.NONE, shape.getLineHeadDecoration());
        assertEquals(DecorationShape.NONE, shape.getLineTailDecoration());
        assertFalse(shape.getSpPr().getLn().getHeadEnd().isSetType());
        assertFalse(shape.getSpPr().getLn().getTailEnd().isSetType());

        shape.setLineHeadDecoration(DecorationShape.ARROW);
        shape.setLineTailDecoration(DecorationShape.DIAMOND);
        assertEquals(DecorationShape.ARROW, shape.getLineHeadDecoration());
        assertEquals(DecorationShape.DIAMOND, shape.getLineTailDecoration());
        assertEquals(STLineEndType.ARROW, shape.getSpPr().getLn().getHeadEnd().getType());
        assertEquals(STLineEndType.DIAMOND, shape.getSpPr().getLn().getTailEnd().getType());

        shape.setLineHeadDecoration(DecorationShape.DIAMOND);
        shape.setLineTailDecoration(DecorationShape.ARROW);
        assertEquals(DecorationShape.DIAMOND, shape.getLineHeadDecoration());
        assertEquals(DecorationShape.ARROW, shape.getLineTailDecoration());
        assertEquals(STLineEndType.DIAMOND, shape.getSpPr().getLn().getHeadEnd().getType());
        assertEquals(STLineEndType.ARROW, shape.getSpPr().getLn().getTailEnd().getType());

        // line end width
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadWidth());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailWidth());
        shape.setLineHeadWidth(null);
        shape.setLineHeadWidth(null);
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadWidth());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailWidth());
        assertFalse(shape.getSpPr().getLn().getHeadEnd().isSetW());
        assertFalse(shape.getSpPr().getLn().getTailEnd().isSetW());
        shape.setLineHeadWidth(DecorationSize.LARGE);
        shape.setLineTailWidth(DecorationSize.MEDIUM);
        assertEquals(DecorationSize.LARGE, shape.getLineHeadWidth());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailWidth());
        assertEquals(STLineEndWidth.LG, shape.getSpPr().getLn().getHeadEnd().getW());
        assertEquals(STLineEndWidth.MED, shape.getSpPr().getLn().getTailEnd().getW());
        shape.setLineHeadWidth(DecorationSize.MEDIUM);
        shape.setLineTailWidth(DecorationSize.LARGE);
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadWidth());
        assertEquals(DecorationSize.LARGE, shape.getLineTailWidth());
        assertEquals(STLineEndWidth.MED, shape.getSpPr().getLn().getHeadEnd().getW());
        assertEquals(STLineEndWidth.LG, shape.getSpPr().getLn().getTailEnd().getW());

        // line end length
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadLength());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailLength());
        shape.setLineHeadLength(null);
        shape.setLineTailLength(null);
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadLength());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailLength());
        assertFalse(shape.getSpPr().getLn().getHeadEnd().isSetLen());
        assertFalse(shape.getSpPr().getLn().getTailEnd().isSetLen());
        shape.setLineHeadLength(DecorationSize.LARGE);
        shape.setLineTailLength(DecorationSize.MEDIUM);
        assertEquals(DecorationSize.LARGE, shape.getLineHeadLength());
        assertEquals(DecorationSize.MEDIUM, shape.getLineTailLength());
        assertEquals(STLineEndLength.LG, shape.getSpPr().getLn().getHeadEnd().getLen());
        assertEquals(STLineEndLength.MED, shape.getSpPr().getLn().getTailEnd().getLen());
        shape.setLineHeadLength(DecorationSize.MEDIUM);
        shape.setLineTailLength(DecorationSize.LARGE);
        assertEquals(DecorationSize.MEDIUM, shape.getLineHeadLength());
        assertEquals(DecorationSize.LARGE, shape.getLineTailLength());
        assertEquals(STLineEndLength.MED, shape.getSpPr().getLn().getHeadEnd().getLen());
        assertEquals(STLineEndLength.LG, shape.getSpPr().getLn().getTailEnd().getLen());

    }

    @Test
    public void testAddConnector(){
        XMLSlideShow pptx = new XMLSlideShow();
        XSLFSlide slide = pptx.createSlide();

        XSLFAutoShape rect1 = slide.createAutoShape();
        rect1.setShapeType(ShapeType.RECT);
        rect1.setAnchor(new Rectangle2D.Double(100, 100, 100, 100));
        rect1.setFillColor(Color.blue);

        XSLFAutoShape rect2 = slide.createAutoShape();
        rect2.setShapeType(ShapeType.RECT);
        rect2.setAnchor(new Rectangle2D.Double(300, 300, 100, 100));
        rect2.setFillColor(Color.red);


        XSLFConnectorShape connector1 = slide.createConnector();
        connector1.setAnchor(new Rectangle2D.Double(200, 150, 100, 200));

        CTConnector ctConnector = (CTConnector)connector1.getXmlObject();
        ctConnector.getSpPr().getPrstGeom().setPrst(STShapeType.BENT_CONNECTOR_3);
        CTNonVisualConnectorProperties cx = ctConnector.getNvCxnSpPr().getCNvCxnSpPr();
        // connection start
        CTConnection stCxn = cx.addNewStCxn();
        stCxn.setId(rect1.getShapeId());
        // side of the rectangle to attach the connector: left=1, bottom=2,right=3, top=4
        stCxn.setIdx(2);

        CTConnection end = cx.addNewEndCxn();
        end.setId(rect2.getShapeId());
        // side of the rectangle to attach the connector: left=1, bottom=2,right=3, top=4
        end.setIdx(3);
    }

}