php - PHPOffice - PowerPoint：如何在我的 PowerPoint 幻灯片中绘制虚线？

Question

我想使用 PHPOffice 在我的 PowerPoint 演示文稿中生成一条虚线，但我只能生成实线或双线。

行生成器代码

$shape->getBorder()
      ->setColor($color)
      ->setLineStyle(Border::LINE_SOLID);

如何正确生成虚线？

达世币生成代码

$shape->getBorder()->setDashStyle(Border::DASH_DASH);

Answer 1

我最终使用以下方案生成虚线。

我求助于生成恒定长度的短线段，而不管起点终点的方向（线的斜率）。

我如何为等长的斜线生成短线段是分几个步骤的。

算法

 0)  Initialize dashLen to an arbitrary value so that we increment to
     2x dashlen on each iteration of loop to cause empty holes to appear in
     line 
 1)  Calculate length of line    d=sqrt(dx*dx+dy*dy) 
 2)  Calculate negative slope since in the y axis is flipped (Y increases as points traverse screen space in downward direction)
 3)  Loop $x and $y and
     increment $y such that 
     $y += 2*$dashLen*sin(atan($m));
     $x -= 2*$dashLen*cos(atan($m));
 4)  Update endpoints

     $endY = $startY + (($dashLen)*sin(atan($m))); 
     $endX = $startX - (($dashLen)*cos(atan($m))); 
 5)  Draw Line Segments (dashes)

代码片段

$d = sqrt(pow($toY-$fromY, 2) + pow($toX-$fromX, 2));
if ($toX != $fromX)
{
      $m = ($toY-$fromY)/($fromX-$toX);
      $dashLen = 2;
      for ($y = $fromY, $x = $fromX; $y < $toY || $x > $toX; $y += ((2*$dashLen*sin(atan($m)))), $x -= (2*$dashLen*cos(atan($m))))
      {   
          $startX = $x;
          $startY = $y;

          $endY = $startY + (($dashLen)*sin(atan($m))); 
          $endX = $startX - (($dashLen)*cos(atan($m)));

          $shape = $currentSlide->createLineShape($startX, $startY, $endX, $endY);


          $color = new Color('FF000000');


          $shape->getFill()
                ->setFillType(Fill::FILL_SOLID)
                ->setStartColor($color)
                ->setEndColor($color);
          $shape->getBorder()
                ->setColor($color)->setLineWidth(2)
                ->setLineStyle($this->getCategoryLine($category));  
      } 
}
else
{

      $dashLen = 2;
      for ($y = $toY; $y > $fromY; $y -= 2*$dashLen)
      {   
          $startX = $fromX;
          $startY = $y;
          $endX = $toX;
          $endY = $y - ($dashLen);             

          $shape = $currentSlide->createLineShape($startX, $startY, $endX, $endY);

          $color = new Color('FF000000');
           $shape->getFill()
                 ->setFillType(Fill::FILL_SOLID)
                 ->setStartColor($color)
                 ->setEndColor($color);
           $shape->getBorder()
                 ->setColor($color)->setLineWidth(2)
                 ->setLineStyle(); 
      }  
}