feature:实现了幻灯片的pdf和图片导出

pom.xml

@@ -26,6 +26,11 @@
             <artifactId>javafx-fxml</artifactId>
             <version>${javafx.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-swing</artifactId>
+            <version>${javafx.version}</version>
+        </dependency>
 
         <!-- Gson库，用于JSON序列化 -->
         <dependency>
@@ -34,6 +39,13 @@
             <version>2.10.1</version>
         </dependency>
 
+        <!-- iText库，用于PDF生成 -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>itextpdf</artifactId>
+            <version>5.5.13.3</version>
+        </dependency>
+
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>

src/main/java/dev/bytevibe/hyperpoint/Controller.java

@@ -50,6 +50,10 @@ public class Controller implements Initializable {
     private Button openSlideButton; // 添加打开幻灯片按钮
     @FXML
     private Button saveSlideButton; // 添加保存幻灯片按钮
+    @FXML
+    private Button exportPageButton; // 添加导出页面按钮
+    @FXML
+    private Button exportSlideButton; // 添加导出幻灯片按钮
 
     private Slide currentSlide;
     private DrawingCanvas drawingCanvas;
@@ -430,6 +434,86 @@ public class Controller implements Initializable {
         }
     }
 
+    /**
+     * 导出页面为图片
+     */
+    @FXML
+    public void onExportPage(ActionEvent actionEvent) {
+        if (drawingCanvas == null) {
+            showWarning("请先选择页面", "请先选择一个页面。");
+            return;
+        }
+
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("导出页面为图片");
+        fileChooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("PNG图片 (*.png)", "*.png"),
+                new FileChooser.ExtensionFilter("JPG图片 (*.jpg)", "*.jpg"),
+                new FileChooser.ExtensionFilter("所有文件", "*.*")
+        );
+
+        SlidePage currentPage = pageListView.getSelectionModel().getSelectedItem();
+        if (currentPage != null) {
+            fileChooser.setInitialFileName(currentPage.getTitle() + ".png");
+        }
+
+        stage = (Stage) exportPageButton.getScene().getWindow();
+        File file = fileChooser.showSaveDialog(stage);
+
+        if (file != null) {
+            try {
+                String format = file.getName().endsWith(".jpg") || file.getName().endsWith(".jpeg") ? "jpg" : "png";
+                ExportUtil.exportPageAsImage(drawingCanvas, file, format);
+
+                Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                alert.setTitle("成功");
+                alert.setHeaderText("页面已导出");
+                alert.setContentText("页面已导出到: " + file.getAbsolutePath());
+                alert.showAndWait();
+            } catch (Exception e) {
+                showWarning("错误", "无法导出页面: " + e.getMessage());
+                e.printStackTrace();
+            }
+        }
+    }
+
+    /**
+     * 导出幻灯片为PDF
+     */
+    @FXML
+    public void onExportSlide(ActionEvent actionEvent) {
+        if (currentSlide == null) {
+            showWarning("无幻灯片", "请先创建或打开一个幻灯片。");
+            return;
+        }
+
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("导出幻灯片为PDF");
+        fileChooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("PDF文件 (*.pdf)", "*.pdf"),
+                new FileChooser.ExtensionFilter("所有文件", "*.*")
+        );
+        fileChooser.setInitialFileName(currentSlide.getName() + ".pdf");
+
+        stage = (Stage) exportSlideButton.getScene().getWindow();
+        File file = fileChooser.showSaveDialog(stage);
+
+        if (file != null) {
+            try {
+                ExportUtil.exportSlideToPDF(currentSlide, file);
+
+                Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                alert.setTitle("成功");
+                alert.setHeaderText("幻灯片已导出为PDF");
+                alert.setContentText("PDF已导出到: " + file.getAbsolutePath());
+                alert.showAndWait();
+            } catch (Exception e) {
+                showWarning("错误", "无法导出PDF: " + e.getMessage());
+                e.printStackTrace();
+            }
+        }
+    }
+
     /**
      * 显示警告对话框
      */

src/main/java/dev/bytevibe/hyperpoint/ExportUtil.java

@@ -0,0 +1,208 @@
+package dev.bytevibe.hyperpoint;
+
+import javafx.scene.image.WritableImage;
+import javafx.scene.image.PixelReader;
+import javafx.scene.layout.Pane;
+import com.itextpdf.text.*;
+import com.itextpdf.text.pdf.PdfWriter;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/**
+ * 导出工具类，用于导出页面为图片和导出幻灯片为PDF
+ */
+public class ExportUtil {
+
+    /**
+     * 导出页面为图片（PNG或JPG）
+     *
+     * @param pane 要导出的页面Pane
+     * @param file 输出文件
+     * @param format 图片格式 "png" 或 "jpg"
+     * @throws IOException 如果导出失败
+     */
+    public static void exportPageAsImage(Pane pane, File file, String format) throws IOException {
+        // 获取Pane的宽度和高度
+        double width = pane.getWidth();
+        double height = pane.getHeight();
+
+        // 如果宽度或高度无效，尝试使用布局宽度/高度
+        if (width <= 0 || height <= 0) {
+            width = pane.getLayoutBounds().getWidth();
+            height = pane.getLayoutBounds().getHeight();
+        }
+
+        // 如果仍然无效，使用固定的默认大小
+        if (width <= 0) {
+            width = 1024;
+        }
+        if (height <= 0) {
+            height = 768;
+        }
+
+        // 创建WritableImage用于捕获页面内容
+        WritableImage writableImage = new WritableImage((int) width, (int) height);
+        pane.snapshot(null, writableImage);
+
+        // 转换为BufferedImage
+        BufferedImage bufferedImage = convertFXImageToBufferedImage(writableImage);
+
+        // 写入文件
+        String formatName = format.equalsIgnoreCase("jpg") ? "jpg" : "png";
+        if (!ImageIO.write(bufferedImage, formatName, file)) {
+            throw new IOException("无法写入" + formatName + "文件");
+        }
+    }
+
+    /**
+     * 将JavaFX WritableImage转换为BufferedImage
+     */
+    private static BufferedImage convertFXImageToBufferedImage(WritableImage fxImage) {
+        int width = (int) fxImage.getWidth();
+        int height = (int) fxImage.getHeight();
+        BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+
+        PixelReader pixelReader = fxImage.getPixelReader();
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                int argb = pixelReader.getArgb(x, y);
+                bufferedImage.setRGB(x, y, argb);
+            }
+        }
+
+        return bufferedImage;
+    }
+
+    /**
+     * 导出整个幻灯片为PDF
+     *
+     * @param slide 要导出的幻灯片
+     * @param file 输出PDF文件
+     * @throws Exception 如果导出失败
+     */
+    public static void exportSlideToPDF(Slide slide, File file) throws Exception {
+        if (slide == null || slide.getPages().isEmpty()) {
+            throw new IOException("幻灯片没有页面");
+        }
+
+        // 创建PDF文档
+        Document document = new Document(PageSize.A4);
+        PdfWriter.getInstance(document, new FileOutputStream(file));
+        document.open();
+
+        // 为每一页添加内容
+        for (SlidePage page : slide.getPages()) {
+            // 添加页面标题
+            Paragraph title = new Paragraph(page.getTitle(), new com.itextpdf.text.Font(
+                    com.itextpdf.text.Font.FontFamily.HELVETICA, 16, com.itextpdf.text.Font.BOLD));
+            title.setSpacingAfter(10);
+            document.add(title);
+
+            // 添加页面内容（如果有的话）
+            if (page.getContent() != null && !page.getContent().isEmpty()) {
+                Paragraph content = new Paragraph(page.getContent(), new com.itextpdf.text.Font(
+                        com.itextpdf.text.Font.FontFamily.HELVETICA, 12));
+                content.setSpacingAfter(10);
+                document.add(content);
+            }
+
+            // 添加对象列表
+            addObjectsToDocument(document, page.getPageContent());
+
+            // 每页之间添加分页符
+            document.newPage();
+        }
+
+        document.close();
+    }
+
+    /**
+     * 将页面内容的对象添加到PDF文档
+     */
+    private static void addObjectsToDocument(Document document, PageContent pageContent) throws DocumentException {
+        for (DrawableObject obj : pageContent.getDrawableObjects()) {
+            if (obj instanceof TextObject) {
+                addTextObjectToDocument(document, (TextObject) obj);
+            } else if (obj instanceof ShapeObject) {
+                addShapeObjectToDocument(document, (ShapeObject) obj);
+            } else if (obj instanceof ImageObject) {
+                addImageObjectToDocument(document, (ImageObject) obj);
+            }
+        }
+    }
+
+    /**
+     * 添加文本对象到PDF
+     */
+    private static void addTextObjectToDocument(Document document, TextObject textObj) throws DocumentException {
+        float fontSize = (float) textObj.getFontSize();
+        int fontStyle = com.itextpdf.text.Font.NORMAL;
+
+        if (textObj.getFontStyle().contains("BOLD")) {
+            fontStyle |= com.itextpdf.text.Font.BOLD;
+        }
+        if (textObj.getFontStyle().contains("ITALIC")) {
+            fontStyle |= com.itextpdf.text.Font.ITALIC;
+        }
+
+        com.itextpdf.text.Font font = new com.itextpdf.text.Font(
+                com.itextpdf.text.Font.FontFamily.HELVETICA, fontSize, fontStyle);
+
+        Paragraph paragraph = new Paragraph(textObj.getText(), font);
+        paragraph.setSpacingAfter(5);
+        document.add(paragraph);
+    }
+
+    /**
+     * 添加形状对象到PDF
+     */
+    private static void addShapeObjectToDocument(Document document, ShapeObject shapeObj) throws DocumentException {
+        String shapeInfo = "图形: " + shapeObj.getShapeType().name() +
+                         " (位置: " + (int)shapeObj.getX() + ", " + (int)shapeObj.getY() +
+                         " 大小: " + (int)shapeObj.getWidth() + "x" + (int)shapeObj.getHeight() + ")";
+
+        Paragraph paragraph = new Paragraph(shapeInfo, new com.itextpdf.text.Font(
+                com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
+        paragraph.setSpacingAfter(5);
+        document.add(paragraph);
+    }
+
+    /**
+     * 添加图片对象到PDF
+     */
+    private static void addImageObjectToDocument(Document document, ImageObject imageObj) throws DocumentException {
+        String imagePath = imageObj.getImagePath();
+        if (imagePath != null && !imagePath.isEmpty()) {
+            try {
+                // 检查文件是否存在
+                File imageFile = new File(imagePath);
+                if (imageFile.exists()) {
+                    Image img = Image.getInstance(imagePath);
+                    // 限制图片大小
+                    float maxWidth = document.getPageSize().getWidth() - 40;
+                    float maxHeight = document.getPageSize().getHeight() / 3;
+                    if (img.getWidth() > maxWidth) {
+                        img.scaleToFit(maxWidth, maxHeight);
+                    }
+                    img.setSpacingAfter(10);
+                    document.add(img);
+                } else {
+                    Paragraph para = new Paragraph("[图片不存在: " + imagePath + "]",
+                            new com.itextpdf.text.Font(com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
+                    para.setSpacingAfter(5);
+                    document.add(para);
+                }
+            } catch (Exception e) {
+                Paragraph para = new Paragraph("[无法加载图片: " + e.getMessage() + "]",
+                        new com.itextpdf.text.Font(com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
+                para.setSpacingAfter(5);
+                document.add(para);
+            }
+        }
+    }
+}
+

src/main/java/module-info.java

@@ -1,9 +1,11 @@
 module dev.bytevibe.hyperpoint {
     requires javafx.controls;
     requires javafx.fxml;
+    requires javafx.graphics;
     requires java.desktop;
     requires com.google.gson;
-
+    requires itextpdf;
+    requires javafx.swing;
 
     opens dev.bytevibe.hyperpoint to javafx.fxml;
     exports dev.bytevibe.hyperpoint;

src/main/resources/dev/bytevibe/hyperpoint/main.fxml

@@ -19,6 +19,8 @@
                   <Button fx:id="newPageButton" mnemonicParsing="false" onAction="#onNewPage" text="新建页面" />
                   <Button fx:id="deletePageButton" mnemonicParsing="false" onAction="#onDeletePage" text="删除页面" />
                   <Button fx:id="saveSlideButton" mnemonicParsing="false" onAction="#onSaveSlide" text="保存幻灯片" />
+                  <Button fx:id="exportPageButton" mnemonicParsing="false" onAction="#onExportPage" text="导出页面" />
+                  <Button fx:id="exportSlideButton" mnemonicParsing="false" onAction="#onExportSlide" text="导出幻灯片" />
                   <Label text=" | " />
                   <Button fx:id="addTextButton" mnemonicParsing="false" onAction="#onAddText" text="添加文本" />
                   <Button fx:id="addLineButton" mnemonicParsing="false" onAction="#onAddLine" text="直线" />