JavaFX:截图功能

Posted 2021-06-23 xhBruce

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JavaFX:截图功能

b站up主Aimls的课程：JavaFX开发桌面截图功能
码农教程：基于Javafx的截图功能实现
脚本之家：Java模拟QQ桌面截图功能实现方法
在这里插入图片描述

鼠标事件

鼠标按下MousePressed
鼠标按下拖拽MouseDragged
鼠标释放MouseReleased

        screenShortPane.setOnMousePressed(screenMouseEvent);
        screenShortPane.setOnMouseDragged(screenMouseEvent);
        screenShortPane.setOnMouseReleased(screenMouseEvent);
// ... ... ... ...
    private EventHandler<MouseEvent> screenMouseEvent = event -> {
        EventType<MouseEvent> eventType = (EventType<MouseEvent>) event.getEventType();
        switch (eventType.getName()) {
            case "MOUSE_PRESSED": {
                // ... ... ... ...
                break;
            }
            case "MOUSE_DRAGGED": {
                // ... ... ... ...
                break;
            }
            case "MOUSE_RELEASED": {
                sceneX_end = event.getSceneX();
                sceneY_end = event.getSceneY();

                hbox.setPrefWidth(sceneX_end - sceneX_start);
                hbox.setPrefHeight(sceneY_end - sceneY_start);

                try {
                    getScreenImg();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                break;
            }
            default:
                break;
        }
    };

设置透明背景

缩小前一个stage：setIconified(true)
Stage透明属性：setFill(Paint.valueOf("#ffffff03"))、setStyle("-fx-background-color:#B5B5B522")、initStyle(StageStyle.TRANSPARENT)
截图全屏显示区域setFullScreen(true)

    public void loadStage() {
        JxhScreenshot.screenShotStage = new Stage();
        JxhScreenshot.window.setIconified(true);

        FXMLLoader fxmlLoader = new FXMLLoader(PathInfo.getfxml("screenshot.fxml"));
        Scene scene = null;
        try {
            fxmlLoader.setController(ScreenshotController.getInstance());
            scene = new Scene(fxmlLoader.load());
        } catch (IOException e) {
            e.printStackTrace();
        }
        scene.setFill(Paint.valueOf("#ffffff03"));
        screenShortPane.setStyle("-fx-background-color:#B5B5B522");
        JxhScreenshot.screenShotStage.setFullScreenExitHint("");
        JxhScreenshot.screenShotStage.setScene(scene);
        JxhScreenshot.screenShotStage.setFullScreen(true);
        JxhScreenshot.screenShotStage.initStyle(StageStyle.TRANSPARENT);
        JxhScreenshot.screenShotStage.show();

        scene.setOnKeyPressed(keyEvent -> {
            if (keyEvent.getCode() == KeyCode.ESCAPE) {
                JxhScreenshot.screenShotStage.close();
                JxhScreenshot.window.setIconified(false);
            }
        });
    }

截屏使用awt

import java.awt.*;
import java.awt.image.BufferedImage;

Robot robot = new Robot();
Rectangle rec = new Rectangle((int) (sceneX_start + 2), (int) (sceneY_start + 2), (int) (w - 4), (int) (h - 4));
BufferedImage buffimg = robot.createScreenCapture(rec);

BufferedImage转换

img = SwingFXUtils.toFXImage(buffimg, null);

截切板保存

    Clipboard cb = Clipboard.getSystemClipboard();
    ClipboardContent content = new ClipboardContent();
    content.putImage(img);
    cb.setContent(content);
    ImageIO.write(buffimg, "png", new File("D:/img.png"));