Php 如何更改JpChart的3D饼图主题

我无法在3D饼图上更改主题或切片颜色。我的代码是：

$graph = new PieGraph(350,250);
$graph->SetShadow();

$graph->title->SetFont(FF_VERDANA,FS_BOLD,18); 
$graph->title->SetColor("darkblue");
$graph->legend->Pos(0.1,0.9);

// Create 3D pie plot
$p1 = new PiePlot3d($data);
$p1->SetLegends($legends);
$p1->SetTheme("earth");
$p1->SetCenter(0.4);
$p1->SetSize(100);
$p1->SetSliceColors(array("red","blue","yellow","orange"));

$p1->SetAngle(45);

$p1->value->SetFont(FF_ARIAL,FS_BOLD,8);
$p1->value->SetColor("navy");

$graph->Add($p1);

---

无论我做什么，颜色都不会改变。我遗漏了什么吗？

在更改主题和颜色之前，将绘图添加到图表中。如果你仔细想想，这是非常有道理的。您必须先创建（定义/添加）某些内容，然后才能对其进行修改

以下所示的更改应该有效：

// Create 3D pie plot
$p1 = new PiePlot3d($data);

$graph->Add($p1);  // moved adding the plot to the graph before changing other things

$p1->SetLegends($legends);
$p1->SetTheme("earth");
$p1->SetCenter(0.4);
$p1->SetSize(100);
$p1->SetSliceColors(array("red","blue","yellow","orange"));
$p1->SetAngle(45);
$p1->value->SetFont(FF_ARIAL,FS_BOLD,8);
$p1->value->SetColor("navy");

---

在更改主题和颜色之前，将绘图添加到图形中。如果你仔细想想，这是非常有道理的。您必须先创建（定义/添加）某些内容，然后才能对其进行修改

以下所示的更改应该有效：

// Create 3D pie plot
$p1 = new PiePlot3d($data);

$graph->Add($p1);  // moved adding the plot to the graph before changing other things

$p1->SetLegends($legends);
$p1->SetTheme("earth");
$p1->SetCenter(0.4);
$p1->SetSize(100);
$p1->SetSliceColors(array("red","blue","yellow","orange"));
$p1->SetAngle(45);
$p1->value->SetFont(FF_ARIAL,FS_BOLD,8);
$p1->value->SetColor("navy");