SetBeginArrow

设置笔触的起始箭头。

语法

expression.SetBeginArrow(type, width, length);

expression - 表示 ApiStroke 类的变量。

参数

名称	必需/可选	数据类型	默认值	描述
type	必需	LineEndType		起始箭头的类型。
width	可选	LineEndSize	"medium"	起始箭头的宽度。
length	可选	LineEndSize	"medium"	起始箭头的长度。

返回值

boolean

示例

在演示文稿中为线条的起点添加箭头。

// How do I set the beginning arrow of a line's stroke in a presentation?

// Create a line, retrieve its stroke, apply a triangle arrow to the start, and label the result in a presentation.

let presentation = Api.GetPresentation();
let slide = presentation.GetSlideByIndex(0);
let fill = Api.CreateSolidFill(Api.RGB(255, 200, 100));
let stroke = Api.CreateStroke(36000, Api.CreateSolidFill(Api.RGB(0, 0, 255)));
let line = Api.CreateShape("line", 100 * 36000, 50 * 36000, fill, stroke);
line.SetPosition(2000000, 1000000);
slide.AddObject(line);
let retrievedStroke = line.GetLine();
let result = retrievedStroke.SetBeginArrow("triangle", "medium", "large");

let label = Api.CreateShape("rect", 120 * 36000, 30 * 36000, fill, Api.CreateStroke(0, Api.CreateNoFill()));
label.SetPosition(2000000, 3000000);
slide.AddObject(label);
label.GetDocContent().GetElement(0).AddText("Begin arrow set: " + result);