使用Python在PDF中绘制多种图形的操作示例

pip install spire.pdf.free

from spire.pdf.common import *
from spire.pdf import *

# 创建 PDF 文档
doc = PdfDocument()
page = doc.Pages.Add()

# 保存绘图状态
state = page.Canvas.Save()

from spire.pdf import *

# 创建 PDF 文档
doc = PdfDocument()
page = doc.Pages.Add()

# 保存绘图环境
state = page.Canvas.Save()

# ========== 1. 绘制线条（实线 + 虚线） ==========
pen1 = PdfPen(PdfRGBColor(Color.get_SteelBlue()), 2.2)
x, y = 50.0, 40.0
length = 350.0

# 实线
page.Canvas.DrawLine(pen1, x, y, x + length, y)

# 虚线线条
y += 25.0
pen1.DashStyle = PdfDashStyle.DashDot
pen1.DashPattern = [2.0, 3.0, 1.0]
page.Canvas.DrawLine(pen1, x, y, x + length, y)


# ========== 2. 绘制三个饼图扇形 ==========
pen2 = PdfPen(PdfRGBColor(Color.get_Maroon()), 1.8)

# 扇形 1
page.Canvas.DrawPie(pen2, 40.0, 90.0, 110.0, 110.0, 270.0, 230.0)

# 扇形 2
page.Canvas.DrawPie(pen2, 170.0, 90.0, 110.0, 110.0, 360.0, 260.0)

# 扇形 3
page.Canvas.DrawPie(pen2, 300.0, 90.0, 110.0, 110.0, 180.0, 330.0)


# ========== 3. 矩形（边框、线性渐变、放射渐变） ==========
# 空心矩形
pen3 = PdfPen(PdfRGBColor(Color.get_SaddleBrown()), 2.0)
page.Canvas.DrawRectangle(
    pen3,
    RectangleF(PointF(40.0, 220.0), SizeF(130.0, 95.0))
)

# 线性渐变矩形
linear = PdfLinearGradientBrush(
    PointF(200.0, 220.0),
    PointF(320.0, 300.0),
    PdfRGBColor(Color.get_LimeGreen()),
    PdfRGBColor(Color.get_Goldenrod())
)
page.Canvas.DrawRectangle(
    linear,
    RectangleF(PointF(200.0, 220.0), SizeF(130.0, 95.0))
)

# 放射渐变矩形
radial = PdfRadialGradientBrush(
    PointF(360.0, 220.0), 90.0,
    PointF(470.0, 300.0), 90.0,
    PdfRGBColor(Color.get_OrangeRed()),
    PdfRGBColor(Color.get_DodgerBlue())
)
page.Canvas.DrawRectangle(
    radial,
    RectangleF(PointF(360.0, 220.0), SizeF(130.0, 95.0))
)


# ========== 4. 椭圆（空心 + 实心） ==========
pen4 = PdfPens.get_CadetBlue()

# 空心椭圆
page.Canvas.DrawEllipse(pen4, 60.0, 350.0, 130.0, 85.0)

# 实心椭圆
brush = PdfSolidBrush(PdfRGBColor(Color.get_CadetBlue()))
page.Canvas.DrawEllipse(brush, 230.0, 350.0, 130.0, 85.0)


# 恢复状态
page.Canvas.Restore(state)

# 保存文件
doc.SaveToFile("Drawing_Shapes.pdf")
doc.Close()
doc.Dispose()