java 在 javaFX 8 中获取节点的屏幕坐标
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Get screen coordinates of a node in javaFX 8
提问by Waxren
I am developing a JavaFX application on Windows 8.1 64bit with 4GB of RAM with JDK version 8u45 64bit.
我正在 Windows 8.1 64bit 上开发 JavaFX 应用程序，带有 4GB RAM 和 JDK 版本 8u45 64bit。
I want to capture part of the screen using Robotbut the problem is that I can't get the screen coordinates of the anchor pane that I want to capture and I don't want to use snapshotbecause the output quality is bad. Here is my code.
我想使用捕获屏幕的一部分，Robot但问题是我无法获得我想要捕获的锚窗格的屏幕坐标，我不想使用，snapshot因为输出质量很差。这是我的代码。
I have seen the question in this link Getting the global coordinate of a Node in JavaFXand this one get real position of a node in javaFXand I tried every answer but nothing is working, the image shows different parts of the screen.
我在这个链接中看到了这个问题， 在 JavaFX 中获取节点的全局坐标，这个 在 javaFX 中获取节点的真实位置，我尝试了每个答案，但没有任何效果，图像显示了屏幕的不同部分。
private void capturePane() {
try {
Bounds bounds = pane.getLayoutBounds();
Point2D coordinates = pane.localToScene(bounds.getMinX(), bounds.getMinY());
int X = (int) coordinates.getX();
int Y = (int) coordinates.getY();
int width = (int) pane.getWidth();
int height = (int) pane.getHeight();
Rectangle screenRect = new Rectangle(X, Y, width, height);
BufferedImage capture = new Robot().createScreenCapture(screenRect);
ImageIO.write(capture, "png", new File("image.png"));
} catch (IOException | AWTException ex) {
ex.printStackTrace();
}
}
回答by James_D
Since you are starting with local (not layout) coordinates, use getBoundsInLocal()instead of getLayoutBounds(). And since you are wanting to transform to screen (not scene) coordinates, use localToScreen(...)instead of localToScene(...):
由于您从本地（而非布局）坐标开始，请使用getBoundsInLocal()代替getLayoutBounds()。并且由于您要转换为屏幕（而不是场景）坐标，请使用localToScreen(...)代替localToScene(...)：
private void capturePane() {
try {
Bounds bounds = pane.getBoundsInLocal();
Bounds screenBounds = pane.localToScreen(bounds);
int x = (int) screenBounds.getMinX();
int y = (int) screenBounds.getMinY();
int width = (int) screenBounds.getWidth();
int height = (int) screenBounds.getHeight();
Rectangle screenRect = new Rectangle(x, y, width, height);
BufferedImage capture = new Robot().createScreenCapture(screenRect);
ImageIO.write(capture, "png", new File("image.png"));
} catch (IOException | AWTException ex) {
ex.printStackTrace();
}
}
