使用 Python via Java 管理簡報中的項目符號與編號清單

概述

Aspose.Slides for Python via Java 讓您在 PowerPoint 與 OpenDocument 簡報中建立與格式化項目符號與編號清單。清單項目是一個段落,其項目符號設定由段落格式控制。

使用 Paragraph.getParagraphFormat 方法存取段落層級的清單設定。主要入口是 ParagraphFormat.getBullet,它會回傳一個 BulletFormat 物件。透過此物件,您可以設定項目符號類型、符號、圖片、顏色、大小、編號樣式以及起始編號。

This article shows how to:

  • 建立具有自訂符號的項目符號清單
  • 建立圖片項目符號
  • 透過設定段落深度建立多層級清單
  • 建立編號清單
  • 檢查並變更現有簡報中的清單格式

建立項目符號清單

要建立項目符號清單,將 Paragraph 物件加入 TextFrame,並將 BulletFormat.setType 設為 BulletType.Symbol。之後您可以使用 BulletFormat.setCharBulletFormat.getColorBulletFormat.setHeight 來控制項目符號的外觀。

以下 Python 程式碼示範如何在投影片上建立項目符號清單:

import jpype
import asposeslides

if not jpype.isJVMStarted():
    jpype.startJVM()

from asposeslides.api import BulletType, NullableBool, Paragraph, Presentation, SaveFormat, ShapeType
from java.awt import Color

presentation = Presentation()
try:
    slide = presentation.getSlides().get_Item(0)
    auto_shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 20, 20, 200, 50)

    text_frame = auto_shape.getTextFrame()
    text_frame.getParagraphs().clear()

    bullet_color = Color(205, 92, 92)

    first_paragraph = Paragraph()
    first_paragraph.getParagraphFormat().getBullet().setType(BulletType.Symbol)
    first_paragraph.getParagraphFormat().getBullet().setChar('*')
    first_paragraph.getParagraphFormat().setIndent(15)
    first_paragraph.getParagraphFormat().getBullet().setBulletHardColor(NullableBool.True_)
    first_paragraph.getParagraphFormat().getBullet().getColor().setColor(bullet_color)
    first_paragraph.getParagraphFormat().getBullet().setHeight(100)
    first_paragraph.setText("The first paragraph")
    text_frame.getParagraphs().add(first_paragraph)

    second_paragraph = Paragraph()
    second_paragraph.getParagraphFormat().getBullet().setType(BulletType.Symbol)
    second_paragraph.getParagraphFormat().getBullet().setChar('*')
    second_paragraph.getParagraphFormat().setIndent(15)
    second_paragraph.getParagraphFormat().getBullet().setBulletHardColor(NullableBool.True_)
    second_paragraph.getParagraphFormat().getBullet().getColor().setColor(bullet_color)
    second_paragraph.getParagraphFormat().getBullet().setHeight(100)
    second_paragraph.setText("The second paragraph")
    text_frame.getParagraphs().add(second_paragraph)

    presentation.save("symbol_bullets.pptx", SaveFormat.Pptx)
finally:
    presentation.dispose()

結果:

符號項目符號

建立編號清單

當項目順序很重要時,請使用編號清單。將 BulletFormat.setType 設為 BulletType.Numbered。您也可以使用 BulletFormat.setNumberedBulletStyle 來選擇編號格式,或在清單起始編號不是 1 時使用 BulletFormat.setNumberedBulletStartWith

以下 Python 程式碼示範如何在投影片上建立編號清單:

import jpype
import asposeslides

if not jpype.isJVMStarted():
    jpype.startJVM()

from asposeslides.api import BulletType, Paragraph, Presentation, SaveFormat, ShapeType

presentation = Presentation()
try:
    slide = presentation.getSlides().get_Item(0)
    auto_shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 20, 20, 90, 80)

    text_frame = auto_shape.getTextFrame()
    text_frame.getParagraphs().clear()

    first_paragraph = Paragraph()
    first_paragraph.getParagraphFormat().getBullet().setType(BulletType.Numbered)
    first_paragraph.setText("Apple")
    text_frame.getParagraphs().add(first_paragraph)

    second_paragraph = Paragraph()
    second_paragraph.getParagraphFormat().getBullet().setType(BulletType.Numbered)
    second_paragraph.setText("Orange")
    text_frame.getParagraphs().add(second_paragraph)

    third_paragraph = Paragraph()
    third_paragraph.getParagraphFormat().getBullet().setType(BulletType.Numbered)
    third_paragraph.setText("Banana")
    text_frame.getParagraphs().add(third_paragraph)

    presentation.save("numbered_bullets.pptx", SaveFormat.Pptx)
finally:
    presentation.dispose()

結果:

編號項目符號

建立圖片項目符號

Aspose.Slides 允許您將一般的項目符號替換為影像。圖片項目符號最適合使用簡單且在小尺寸下仍可辨識的圖像,例如圖示或小型透明 PNG 檔案。

要建立圖片項目符號,先將影像加入 Presentation.getImages,並把返回的影像物件指派給 BulletFormat.getPicture。在指派影像之前,先將 BulletFormat.setType 設為 BulletType.Picture

假設我們有一個名為 “image.png” 的影像:

用於項目符號的圖片

以下 Python 程式碼示範如何在投影片上建立圖片項目符號:

import jpype
import asposeslides

if not jpype.isJVMStarted():
    jpype.startJVM()

from asposeslides.api import BulletType, Images, Paragraph, Presentation, SaveFormat, ShapeType

presentation = Presentation()
try:
    slide = presentation.getSlides().get_Item(0)
    auto_shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 20, 20, 200, 50)

    text_frame = auto_shape.getTextFrame()
    text_frame.getParagraphs().clear()

    image = Images.fromFile("image.png")
    try:
        bullet_image = presentation.getImages().addImage(image)
    finally:
        image.dispose()

    first_paragraph = Paragraph()
    first_paragraph.getParagraphFormat().getBullet().setType(BulletType.Picture)
    first_paragraph.getParagraphFormat().getBullet().getPicture().setImage(bullet_image)
    first_paragraph.getParagraphFormat().setIndent(15)
    first_paragraph.getParagraphFormat().getBullet().setHeight(100)
    first_paragraph.setText("The first paragraph")
    text_frame.getParagraphs().add(first_paragraph)

    second_paragraph = Paragraph()
    second_paragraph.getParagraphFormat().getBullet().setType(BulletType.Picture)
    second_paragraph.getParagraphFormat().getBullet().getPicture().setImage(bullet_image)
    second_paragraph.getParagraphFormat().setIndent(15)
    second_paragraph.getParagraphFormat().getBullet().setHeight(100)
    second_paragraph.setText("The second paragraph")
    text_frame.getParagraphs().add(second_paragraph)

    presentation.save("picture_bullets.pptx", SaveFormat.Pptx)
finally:
    presentation.dispose()

結果:

圖片項目符號

建立多層級清單

使用 ParagraphFormat.setDepth 可以將清單項目放置於不同層級。層級 0 為最上層,層級 1 為其下的子層,依此類推。

以下 Python 程式碼示範如何建立多層級項目符號清單:

import jpype
import asposeslides

if not jpype.isJVMStarted():
    jpype.startJVM()

from asposeslides.api import Paragraph, Presentation, SaveFormat, ShapeType

presentation = Presentation()
try:
    slide = presentation.getSlides().get_Item(0)
    auto_shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 20, 20, 260, 110)

    text_frame = auto_shape.getTextFrame()
    text_frame.getParagraphs().clear()

    first_paragraph = Paragraph()
    first_paragraph.getParagraphFormat().setDepth(0)
    first_paragraph.setText("My text - Depth 0")
    text_frame.getParagraphs().add(first_paragraph)

    second_paragraph = Paragraph()
    second_paragraph.getParagraphFormat().setDepth(1)
    second_paragraph.setText("My text - Depth 1")
    text_frame.getParagraphs().add(second_paragraph)

    third_paragraph = Paragraph()
    third_paragraph.getParagraphFormat().setDepth(2)
    third_paragraph.setText("My text - Depth 2")
    text_frame.getParagraphs().add(third_paragraph)

    fourth_paragraph = Paragraph()
    fourth_paragraph.getParagraphFormat().setDepth(3)
    fourth_paragraph.setText("My text - Depth 3")
    text_frame.getParagraphs().add(fourth_paragraph)

    presentation.save("multilevel_bullets.pptx", SaveFormat.Pptx)
finally:
    presentation.dispose()

結果:

多層級清單

變更現有清單

若要變更現有簡報中的清單格式,請存取目標段落並更新其 ParagraphFormat.getBullet 設定。建立清單時使用的相同屬性也可用於檢查或修改從 PPT、PPTX 或 ODP 檔案載入的清單。

以下 Python 程式碼將文字框中的第一個段落變更為使用編號清單樣式:

import jpype
import asposeslides

if not jpype.isJVMStarted():
    jpype.startJVM()

from asposeslides.api import BulletType, NumberedBulletStyle, Presentation, SaveFormat

presentation = Presentation("input.pptx")
try:
    slide = presentation.getSlides().get_Item(0)
    auto_shape = slide.getShapes().get_Item(0)
    paragraph = auto_shape.getTextFrame().getParagraphs().get_Item(0)

    paragraph.getParagraphFormat().getBullet().setType(BulletType.Numbered)
    paragraph.getParagraphFormat().getBullet().setNumberedBulletStyle(NumberedBulletStyle.BulletRomanUCPeriod)
    paragraph.getParagraphFormat().getBullet().setNumberedBulletStartWith(1)
    paragraph.getParagraphFormat().setMarginLeft(30)
    paragraph.getParagraphFormat().setIndent(-20)

    presentation.save("updated_list.pptx", SaveFormat.Pptx)
finally:
    presentation.dispose()

常見問題

是否可以將項目符號與編號清單匯出為 PDF 或影像?

是。當目標格式支援相應的文字版面配置與項目符號功能時,Aspose.Slides 會保留清單格式。

我可以編輯現有簡報中的清單嗎?

是。載入簡報,存取目標段落,檢查或更新其 ParagraphFormat.getBullet 設定,然後儲存簡報。

清單可以包含非拉丁文字嗎?

是。清單項目的文字可以包含 Unicode 字元,您因此可以在多語言簡報中建立清單。請確保簡報中使用的字型支援您所需的字元。