Support for line smooth for line and scatter chart

docs/changes/1.0.0.md

@@ -49,6 +49,9 @@
 - Support for interval unit for Chart's Axis - @Progi1984 GH-546
   - ODPresentation Writer
   - PowerPoint2007 Writer
+- Support for line smooth for line and scatter chart - @ksmeeks0001 GH-626 & @Progi1984 GH-662
+  - ODPresentation Writer
+  - PowerPoint2007 Writer
 
 ## Project Management
 - Migrated from Travis CI to Github Actions - @Progi1984 GH-635

docs/usage/shapes/chart.md

@@ -364,13 +364,43 @@ $barChart->setBarGrouping(Bar::GROUPING_PERCENTSTACKED);
 
 ### Line
 
-TODO
+#### Smooth line
+
+You can enable or disable the smooth line with `setIsSmooth` method from `AbstractTypeLine`.
+By default, smooth line is disabled.
+
+``` php
+<?php
+
+$chart = new Line();
+// Enable the smooth line
+$chart->setIsSmooth(true);
+// Disable the smooth line
+$chart->setIsSmooth(false);
+// Get status of smooth line
+$chart->isSmooth();
+```
 
 ### Pie & Pie3D
 
 TODO
 
 ### Scatter
 
-TODO
+#### Smooth line
+
+You can enable or disable the smooth line with `setIsSmooth` method from `AbstractTypeLine`.
+By default, smooth line is disabled.
+
+``` php
+<?php
+
+$chart = new Scatter();
+// Enable the smooth line
+$chart->setIsSmooth(true);
+// Disable the smooth line
+$chart->setIsSmooth(false);
+// Get status of smooth line
+$chart->isSmooth();
+```
 

samples/Sample_05_Chart.php

@@ -562,6 +562,7 @@ function fnSlide_Scatter(PhpPresentation $objPHPPresentation)
     // Create a scatter chart (that should be inserted in a shape)
     echo date('H:i:s') . ' Create a scatter chart (that should be inserted in a chart shape)' . EOL;
     $lineChart = new Scatter();
+    $lineChart->setIsSmooth(true);
     $series = new Series('Downloads', $seriesData);
     $series->setShowSeriesName(true);
     $series->getMarker()->setSymbol(\PhpOffice\PhpPresentation\Shape\Chart\Marker::SYMBOL_CIRCLE);

src/PhpPresentation/Shape/Chart/Type/AbstractTypeLine.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * This file is part of PHPPresentation - A pure PHP library for reading and writing
+ * presentations documents.
+ *
+ * PHPPresentation is free software distributed under the terms of the GNU Lesser
+ * General Public License version 3 as published by the Free Software Foundation.
+ *
+ * For the full copyright and license information, please read the LICENSE
+ * file that was distributed with this source code. For the full list of
+ * contributors, visit https://github.com/PHPOffice/PHPPresentation/contributors.
+ *
+ * @see        https://github.com/PHPOffice/PHPPresentation
+ *
+ * @copyright   2009-2015 PHPPresentation contributors
+ * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
+ */
+
+namespace PhpOffice\PhpPresentation\Shape\Chart\Type;
+
+class AbstractTypeLine extends AbstractType
+{
+    /**
+     * Is Line Smooth?
+     *
+     * @var bool
+     */
+    protected $isSmooth = false;
+
+    /**
+     * Is Line Smooth?
+     *
+     * @return bool
+     */
+    public function isSmooth(): bool
+    {
+        return $this->isSmooth;
+    }
+
+    /**
+     * Set Line Smoothness
+     *
+     * @param bool $value
+     *
+     * @return AbstractTypeLine
+     */
+    public function setIsSmooth(bool $value = true): AbstractTypeLine
+    {
+        $this->isSmooth = $value;
+
+        return $this;
+    }
+
+    /**
+     * Get hash code.
+     *
+     * @return string Hash code
+     */
+    public function getHashCode(): string
+    {
+        return md5($this->isSmooth() ? '1' : '0');
+    }
+}

src/PhpPresentation/Shape/Chart/Type/Line.php

@@ -20,10 +20,7 @@
 
 use PhpOffice\PhpPresentation\ComparableInterface;
 
-/**
- * \PhpOffice\PhpPresentation\Shape\Chart\Type\Line.
- */
-class Line extends AbstractType implements ComparableInterface
+class Line extends AbstractTypeLine implements ComparableInterface
 {
     /**
      * Get hash code.
@@ -37,6 +34,6 @@ public function getHashCode(): string
             $hash .= $series->getHashCode();
         }
 
-        return md5($hash . __CLASS__);
+        return md5(parent::getHashCode() . $hash . __CLASS__);
     }
 }

src/PhpPresentation/Shape/Chart/Type/Scatter.php

@@ -20,10 +20,7 @@
 
 use PhpOffice\PhpPresentation\ComparableInterface;
 
-/**
- * \PhpOffice\PhpPresentation\Shape\Chart\Type\Scatter.
- */
-class Scatter extends AbstractType implements ComparableInterface
+class Scatter extends AbstractTypeLine implements ComparableInterface
 {
     /**
      * Get hash code.
@@ -37,6 +34,6 @@ public function getHashCode(): string
             $hash .= $series->getHashCode();
         }
 
-        return md5($hash . __CLASS__);
+        return md5(parent::getHashCode() . $hash . __CLASS__);
     }
 }

src/PhpPresentation/Writer/ODPresentation/ObjectsChart.php

@@ -10,6 +10,7 @@
 use PhpOffice\PhpPresentation\Shape\Chart\Axis;
 use PhpOffice\PhpPresentation\Shape\Chart\Title;
 use PhpOffice\PhpPresentation\Shape\Chart\Type\AbstractTypeBar;
+use PhpOffice\PhpPresentation\Shape\Chart\Type\AbstractTypeLine;
 use PhpOffice\PhpPresentation\Shape\Chart\Type\AbstractTypePie;
 use PhpOffice\PhpPresentation\Shape\Chart\Type\Area;
 use PhpOffice\PhpPresentation\Shape\Chart\Type\Bar;
@@ -560,6 +561,8 @@ private function writePlotAreaStyle(Chart $chart): void
         } elseif ($chartType instanceof Pie3D) {
             $this->xmlContent->writeAttribute('chart:three-dimensional', 'true');
             $this->xmlContent->writeAttribute('chart:right-angled-axes', 'true');
+        } elseif ($chartType instanceof AbstractTypeLine) {
+            $this->xmlContent->writeAttributeIf($chartType->isSmooth(), 'chart:interpolation', 'cubic-spline');
         }
         switch ($chart->getDisplayBlankAs()) {
             case Chart::BLANKAS_ZERO:

src/PhpPresentation/Writer/PowerPoint2007/PptCharts.php

@@ -1826,6 +1826,11 @@ protected function writeTypeLine(XMLWriter $objWriter, Line $subject, bool $incl
             $this->writeMultipleValuesOrReference($objWriter, $includeSheet, $axisYData, $coords);
             $objWriter->endElement();
 
+            // c:smooth
+            $objWriter->startElement('c:smooth');
+            $objWriter->writeAttribute('val', $subject->isSmooth() ? '1' : '0');
+            $objWriter->endElement();
+
             $objWriter->endElement();
 
             ++$seriesIndex;
@@ -1836,11 +1841,6 @@ protected function writeTypeLine(XMLWriter $objWriter, Line $subject, bool $incl
         $objWriter->writeAttribute('val', '1');
         $objWriter->endElement();
 
-        // c:smooth
-        $objWriter->startElement('c:smooth');
-        $objWriter->writeAttribute('val', '0');
-        $objWriter->endElement();
-
         // c:axId
         $objWriter->startElement('c:axId');
         $objWriter->writeAttribute('val', '52743552');
@@ -2012,7 +2012,7 @@ protected function writeTypeScatter(XMLWriter $objWriter, Scatter $subject, bool
 
             // c:smooth
             $objWriter->startElement('c:smooth');
-            $objWriter->writeAttribute('val', '0');
+            $objWriter->writeAttribute('val', $subject->isSmooth() ? '1' : '0');
             $objWriter->endElement();
 
             $objWriter->endElement();

tests/PhpPresentation/Tests/Shape/Chart/Type/LineTest.php

@@ -41,27 +41,39 @@ public function testData(): void
             new Series(),
         ];
 
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Line', $object->setSeries());
+        $this->assertInstanceOf(Line::class, $object->setSeries());
         $this->assertEmpty($object->getSeries());
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Line', $object->setSeries($array));
+        $this->assertInstanceOf(Line::class, $object->setSeries($array));
         $this->assertCount(count($array), $object->getSeries());
     }
 
-    public function testSerties(): void
+    public function testSeries(): void
     {
         $object = new Line();
 
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Line', $object->addSeries(new Series()));
+        $this->assertInstanceOf(Line::class, $object->addSeries(new Series()));
         $this->assertCount(1, $object->getSeries());
     }
 
+    public function testSmooth(): void
+    {
+        $object = new Line();
+
+        $this->assertFalse($object->isSmooth());
+        $this->assertInstanceOf(Line::class, $object->setIsSmooth(true));
+        $this->assertTrue($object->isSmooth());
+    }
+
     public function testHashCode(): void
     {
-        $oSeries = new Series();
+        $series = new Series();
 
         $object = new Line();
-        $object->addSeries($oSeries);
+        $object->addSeries($series);
 
-        $this->assertEquals(md5($oSeries->getHashCode() . get_class($object)), $object->getHashCode());
+        $this->assertEquals(
+            md5(md5($object->isSmooth() ? '1' : '0') . $series->getHashCode() . get_class($object)),
+            $object->getHashCode()
+        );
     }
 }

tests/PhpPresentation/Tests/Shape/Chart/Type/ScatterTest.php

@@ -41,27 +41,39 @@ public function testData(): void
             new Series(),
         ];
 
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Scatter', $object->setSeries());
+        $this->assertInstanceOf(Scatter::class, $object->setSeries());
         $this->assertEmpty($object->getSeries());
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Scatter', $object->setSeries($array));
+        $this->assertInstanceOf(Scatter::class, $object->setSeries($array));
         $this->assertCount(count($array), $object->getSeries());
     }
 
-    public function testSerties(): void
+    public function testSeries(): void
     {
         $object = new Scatter();
 
-        $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Scatter', $object->addSeries(new Series()));
+        $this->assertInstanceOf(Scatter::class, $object->addSeries(new Series()));
         $this->assertCount(1, $object->getSeries());
     }
 
+    public function testSmooth(): void
+    {
+        $object = new Scatter();
+
+        $this->assertFalse($object->isSmooth());
+        $this->assertInstanceOf(Scatter::class, $object->setIsSmooth(true));
+        $this->assertTrue($object->isSmooth());
+    }
+
     public function testHashCode(): void
     {
-        $oSeries = new Series();
+        $series = new Series();
 
         $object = new Scatter();
-        $object->addSeries($oSeries);
+        $object->addSeries($series);
 
-        $this->assertEquals(md5($oSeries->getHashCode() . get_class($object)), $object->getHashCode());
+        $this->assertEquals(
+            md5(md5($object->isSmooth() ? '1' : '0') . $series->getHashCode() . get_class($object)),
+            $object->getHashCode()
+        );
     }
 }

tests/PhpPresentation/Tests/Writer/ODPresentation/ObjectsChartTest.php

@@ -1021,6 +1021,37 @@ public function testTypeLineSeriesOutline(): void
         $this->assertIsSchemaOpenDocumentNotValid('1.2');
     }
 
+    public function testTypeLineSmooth(): void
+    {
+        $element = '/office:document-content/office:automatic-styles/style:style[@style:name=\'stylePlotArea\']/style:chart-properties';
+
+        $oSeries = new Series('Downloads', $this->seriesData);
+
+        $oLine = new Line();
+        $oLine->addSeries($oSeries);
+        $oLine->setIsSmooth(false);
+
+        $oShape = $this->oPresentation->getActiveSlide()->createChartShape();
+        $oShape->getPlotArea()->setType($oLine);
+
+        $this->assertZipFileExists('Object 1/content.xml');
+        $this->assertZipXmlElementExists('Object 1/content.xml', $element);
+        $this->assertZipXmlAttributeNotExists('Object 1/content.xml', $element, 'chart:interpolation');
+        // chart:title : Element chart failed to validate attributes
+        $this->assertIsSchemaOpenDocumentNotValid('1.2');
+
+        $this->resetPresentationFile();
+        $oLine->setIsSmooth(true);
+        $oShape->getPlotArea()->setType($oLine);
+
+        $this->assertZipFileExists('Object 1/content.xml');
+        $this->assertZipXmlElementExists('Object 1/content.xml', $element);
+        $this->assertZipXmlAttributeExists('Object 1/content.xml', $element, 'chart:interpolation');
+        $this->assertZipXmlAttributeEquals('Object 1/content.xml', $element, 'chart:interpolation', 'cubic-spline');
+        // chart:title : Element chart failed to validate attributes
+        $this->assertIsSchemaOpenDocumentNotValid('1.2');
+    }
+
     public function testTypePie(): void
     {
         $oSeries = new Series('Series', ['Jan' => '1', 'Feb' => '5', 'Mar' => '2']);
@@ -1225,4 +1256,35 @@ public function testTypeScatterSeriesOutline(): void
         // chart:title : Element chart failed to validate attributes
         $this->assertIsSchemaOpenDocumentNotValid('1.2');
     }
+
+    public function testTypeScatterSmooth(): void
+    {
+        $element = '/office:document-content/office:automatic-styles/style:style[@style:name=\'stylePlotArea\']/style:chart-properties';
+
+        $oSeries = new Series('Downloads', $this->seriesData);
+
+        $scatter = new Scatter();
+        $scatter->addSeries($oSeries);
+        $scatter->setIsSmooth(false);
+
+        $oShape = $this->oPresentation->getActiveSlide()->createChartShape();
+        $oShape->getPlotArea()->setType($scatter);
+
+        $this->assertZipFileExists('Object 1/content.xml');
+        $this->assertZipXmlElementExists('Object 1/content.xml', $element);
+        $this->assertZipXmlAttributeNotExists('Object 1/content.xml', $element, 'chart:interpolation');
+        // chart:title : Element chart failed to validate attributes
+        $this->assertIsSchemaOpenDocumentNotValid('1.2');
+
+        $this->resetPresentationFile();
+        $scatter->setIsSmooth(true);
+        $oShape->getPlotArea()->setType($scatter);
+
+        $this->assertZipFileExists('Object 1/content.xml');
+        $this->assertZipXmlElementExists('Object 1/content.xml', $element);
+        $this->assertZipXmlAttributeExists('Object 1/content.xml', $element, 'chart:interpolation');
+        $this->assertZipXmlAttributeEquals('Object 1/content.xml', $element, 'chart:interpolation', 'cubic-spline');
+        // chart:title : Element chart failed to validate attributes
+        $this->assertIsSchemaOpenDocumentNotValid('1.2');
+    }
 }