图表数据标签

图表上的数据标签显示有关图表数据系列或单个数据点的详细信息。它们允许读者快速识别数据系列，并使图表更易于理解。

设置图表数据标签中的数据精度

以下PHP代码展示如何在图表数据标签中设置数据精度：

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Line, 50, 50, 450, 300);
    $chart->setDataTable(true);
    $chart->getChartData()->getSeries()->get_Item(0)->setNumberFormatOfValues("#,##0.00");
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

将百分比作为标签显示

Aspose.Slides for PHP via Java允许您在显示的图表上设置百分比标签。以下PHP代码演示了此操作：

  # 创建Presentation类的实例
  $pres = new Presentation();
  try {
    # 获取第一个幻灯片
    $slide = $pres->getSlides()->get_Item(0);
    $chart = $slide->getShapes()->addChart(ChartType::StackedColumn, 20, 20, 400, 400);
    $series;
    $total_for_Cat = new double[$chart->getChartData()->getCategories()->size()];
    for($k = 0; $k < java_values($chart->getChartData()->getCategories()->size()) ; $k++) {
      $cat = $chart->getChartData()->getCategories()->get_Item($k);
      for($i = 0; $i < java_values($chart->getChartData()->getSeries()->size()) ; $i++) {
        $total_for_Cat[$k] = $total_for_Cat[$k] + $chart->getChartData()->getSeries()->get_Item($i)->getDataPoints()->get_Item($k)->getValue()->getData();
      }
    }
    $dataPontPercent = 0.0;
    for($x = 0; $x < java_values($chart->getChartData()->getSeries()->size()) ; $x++) {
      $series = $chart->getChartData()->getSeries()->get_Item($x);
      $series->getLabels()->getDefaultDataLabelFormat()->setShowLegendKey(false);
      for($j = 0; $j < java_values($series->getDataPoints()->size()) ; $j++) {
        $lbl = $series->getDataPoints()->get_Item($j)->getLabel();
        $dataPontPercent = $series->getDataPoints()->get_Item($j)->getValue()->getData() / $total_for_Cat[$j] * 100;
        $port = new Portion();
        $port->setText(sprintf("{0:F2} %.2f", $dataPontPercent));
        $port->getPortionFormat()->setFontHeight(8.0);
        $lbl->getTextFrameForOverriding()->setText("");
        $para = $lbl->getTextFrameForOverriding()->getParagraphs()->get_Item(0);
        $para->getPortions()->add($port);
        $lbl->getDataLabelFormat()->setShowSeriesName(false);
        $lbl->getDataLabelFormat()->setShowPercentage(false);
        $lbl->getDataLabelFormat()->setShowLegendKey(false);
        $lbl->getDataLabelFormat()->setShowCategoryName(false);
        $lbl->getDataLabelFormat()->setShowBubbleSize(false);
      }
    }
    # 保存包含图表的演示文稿
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

设置图表数据标签中的百分号

以下PHP代码展示如何为图表数据标签设置百分号：

  # 创建Presentation类的实例
  $pres = new Presentation();
  try {
    # 通过索引获取幻灯片的引用
    $slide = $pres->getSlides()->get_Item(0);
    # 在幻灯片上创建PercentsStackedColumn图表
    $chart = $slide->getShapes()->addChart(ChartType::PercentsStackedColumn, 20, 20, 500, 400);
    # 将NumberFormatLinkedToSource设置为false
    $chart->getAxes()->getVerticalAxis()->setNumberFormatLinkedToSource(false);
    $chart->getAxes()->getVerticalAxis()->setNumberFormat("0.00%");
    $chart->getChartData()->getSeries()->clear();
    $defaultWorksheetIndex = 0;
    # 获取图表数据工作表
    $workbook = $chart->getChartData()->getChartDataWorkbook();
    # 添加新的系列
    $series = $chart->getChartData()->getSeries()->add($workbook->getCell($defaultWorksheetIndex, 0, 1, "Reds"), $chart->getType());
    $series->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 1, 1, 0.3));
    $series->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 2, 1, 0.5));
    $series->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 3, 1, 0.8));
    $series->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 4, 1, 0.65));
    # 设置系列的填充颜色
    $series->getFormat()->getFill()->setFillType(FillType::Solid);
    $series->getFormat()->getFill()->getSolidFillColor()->setColor(java("java.awt.Color")->RED);
    # 设置LabelFormat属性
    $series->getLabels()->getDefaultDataLabelFormat()->setShowValue(true);
    $series->getLabels()->getDefaultDataLabelFormat()->setNumberFormatLinkedToSource(false);
    $series->getLabels()->getDefaultDataLabelFormat()->setNumberFormat("0.0%");
    $series->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->setFontHeight(10);
    $series->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->getFillFormat()->setFillType(FillType::Solid);
    $series->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->getFillFormat()->getSolidFillColor()->setColor(java("java.awt.Color")->WHITE);
    $series->getLabels()->getDefaultDataLabelFormat()->setShowValue(true);
    # 添加新的系列
    $series2 = $chart->getChartData()->getSeries()->add($workbook->getCell($defaultWorksheetIndex, 0, 2, "Blues"), $chart->getType());
    $series2->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 1, 2, 0.7));
    $series2->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 2, 2, 0.5));
    $series2->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 3, 2, 0.2));
    $series2->getDataPoints()->addDataPointForBarSeries($workbook->getCell($defaultWorksheetIndex, 4, 2, 0.35));
    # 设置填充类型和颜色
    $series2->getFormat()->getFill()->setFillType(FillType::Solid);
    $series2->getFormat()->getFill()->getSolidFillColor()->setColor(java("java.awt.Color")->BLUE);
    $series2->getLabels()->getDefaultDataLabelFormat()->setShowValue(true);
    $series2->getLabels()->getDefaultDataLabelFormat()->setNumberFormatLinkedToSource(false);
    $series2->getLabels()->getDefaultDataLabelFormat()->setNumberFormat("0.0%");
    $series2->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->setFontHeight(10);
    $series2->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->getFillFormat()->setFillType(FillType::Solid);
    $series2->getLabels()->getDefaultDataLabelFormat()->getTextFormat()->getPortionFormat()->getFillFormat()->getSolidFillColor()->setColor(java("java.awt.Color")->WHITE);
    # 将演示文稿写入磁盘
    $pres->save("SetDataLabelsPercentageSign_out.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

设置标签距离 从轴

以下PHP代码展示如何在处理从轴绘制的图表时设置分类轴的标签距离：

  # 创建Presentation类的实例
  $pres = new Presentation();
  try {
    # 获取幻灯片的引用
    $sld = $pres->getSlides()->get_Item(0);
    # 在幻灯片上创建一个图表
    $ch = $sld->getShapes()->addChart(ChartType::ClusteredColumn, 20, 20, 500, 300);
    # 设置标签距离
    $ch->getAxes()->getHorizontalAxis()->setLabelOffset(500);
    # 将演示文稿写入磁盘
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

调整标签位置

当您创建一个不依赖于任何轴的图表（如饼图）时，图表的数据标签可能会与边缘太近。在这种情况下，您需要调整数据标签的位置，以便清晰显示引导线。

以下PHP代码展示如何在饼图上调整标签位置：

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Pie, 50, 50, 200, 200);
    $series = $chart->getChartData()->getSeries();
    $label = $series->get_Item(0)->getLabels()->get_Item(0);
    $label->getDataLabelFormat()->setShowValue(true);
    $label->getDataLabelFormat()->setPosition(LegendDataLabelPosition->OutsideEnd);
    $label->setX(0.71);
    $label->setY(0.04);
    $pres->save("pres.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }