Java在多个监视器环境中获取鼠标位置
我在互联网上搜索了一段时间，但我找不到解决问题的方法。 我知道你可以获得当前的鼠标位置
PointerInfo a = MouseInfo.getPointerInfo(); Point b = a.getLocation(); 问题是在多环境屏幕中我只是相对于主屏幕获取鼠标位置。 这意味着如果第二个屏幕位于我收到的主屏幕左侧，例如X：-917.0位置Y：-137.0。 我知道这些值取决于屏幕分辨率和显示器的顺序。 是否有可能在当前活动屏幕上获取鼠标位置？
亲切的问候
基本上，我做的是获取PointerInfo并从中减去GraphicsDevice边界，如果结果小于0 （因为屏幕是主屏幕左侧），我将结果乘以-1
解决方案的核心看起来像这样……
// Pointer info PointerInfo pi = MouseInfo.getPointerInfo(); Point mp = pi.getLocation(); // The devices bounds Rectangle bounds = getDeviceBounds(pi.getDevice()); // Create new "virtual" point based on the mouse point virtualPoint = new Point(mp); // Subtract the x/y position of the device virtualPoint.x -= bounds.x; virtualPoint.y -= bounds.y; // Clip negative values... if (virtualPoint.x < 0) { virtualPoint.x *= -1; } if (virtualPoint.y < 0) { virtualPoint.y *= -1; }
以下示例显示第一行的实际桌面鼠标位置（由MouseInfo报告），第二行显示GraphicsDevice上下文中的“屏幕”位置
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.MouseInfo; import java.awt.Point; import java.awt.PointerInfo; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class WheresMyMouse { public static void main(String[] args) { new WheresMyMouse(); } public WheresMyMouse() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { private double scale; private List screenBounds; private Point virtualPoint; private Point screenPoint; public TestPane() { screenBounds = getScreenBounds(); Timer timer = new Timer(40, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { PointerInfo pi = MouseInfo.getPointerInfo(); Point mp = pi.getLocation(); Rectangle bounds = getDeviceBounds(pi.getDevice()); screenPoint = new Point(mp); virtualPoint = new Point(mp); virtualPoint.x -= bounds.x; virtualPoint.y -= bounds.y; if (virtualPoint.x < 0) { virtualPoint.x *= -1; } if (virtualPoint.y < 0) { virtualPoint.y *= -1; } repaint(); } }); timer.start(); } @Override public void invalidate() { super.invalidate(); Rectangle virtualBounds = getVirtualBounds(); scale = getScaleFactorToFit(virtualBounds.getSize(), getSize()); } @Override public Dimension getPreferredSize() { return new Dimension(200, 200); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); int xOffset = 0; int yOffset = 0; List scaledBounds = new ArrayList<>(screenBounds.size()); for (Rectangle bounds : screenBounds) { bounds = scale(bounds); scaledBounds.add(bounds); if (bounds.x < xOffset) { xOffset = bounds.x; } if (bounds.y < yOffset) { yOffset = bounds.y; } } if (xOffset < 0) { xOffset *= -1; } if (yOffset < 0) { yOffset *= -1; } for (Rectangle bounds : scaledBounds) { bounds.x += xOffset; bounds.y += xOffset; g2d.setColor(Color.DARK_GRAY); g2d.fill(bounds); g2d.setColor(Color.GRAY); g2d.draw(bounds); } FontMetrics fm = g2d.getFontMetrics(); g2d.setColor(Color.WHITE); if (screenPoint != null) { int x = 0; int y = fm.getAscent(); g2d.drawString(screenPoint.toString(), x, y); screenPoint.x += xOffset; screenPoint.y += yOffset; screenPoint.x *= scale; screenPoint.y *= scale; g2d.fillOval(screenPoint.x - 2, screenPoint.y - 2, 4, 4); } if (virtualPoint != null) { int x = 0; int y = fm.getAscent() + fm.getHeight(); g2d.drawString(virtualPoint.toString(), x, y); } g2d.dispose(); } protected Rectangle scale(Rectangle bounds) { Rectangle scaled = new Rectangle(bounds); scaled.x *= scale; scaled.y *= scale; scaled.width *= scale; scaled.height *= scale; return scaled; } } public static Rectangle getScreenBoundsAt(Point pos) { GraphicsDevice gd = getGraphicsDeviceAt(pos); Rectangle bounds = null; if (gd != null) { bounds = gd.getDefaultConfiguration().getBounds(); } return bounds; } public List getScreenBounds() { List bounds = new ArrayList<>(25); GraphicsDevice device = null; GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice lstGDs[] = ge.getScreenDevices(); ArrayList lstDevices = new ArrayList (lstGDs.length); for (GraphicsDevice gd : lstGDs) { GraphicsConfiguration gc = gd.getDefaultConfiguration(); Rectangle screenBounds = gc.getBounds(); bounds.add(screenBounds); } return bounds; } public static Rectangle getDeviceBounds(GraphicsDevice device) { GraphicsConfiguration gc = device.getDefaultConfiguration(); Rectangle bounds = gc.getBounds(); return bounds; } public static GraphicsDevice getGraphicsDeviceAt(Point pos) { GraphicsDevice device = null; GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice lstGDs[] = ge.getScreenDevices(); ArrayList lstDevices = new ArrayList (lstGDs.length); for (GraphicsDevice gd : lstGDs) { Rectangle screenBounds = getDeviceBounds(gd); if (screenBounds.contains(pos)) { lstDevices.add(gd); } } if (lstDevices.size() == 1) { device = lstDevices.get(0); } return device; } public static Rectangle getVirtualBounds() { Rectangle bounds = new Rectangle(0, 0, 0, 0); GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice lstGDs[] = ge.getScreenDevices(); for (GraphicsDevice gd : lstGDs) { bounds.add(getDeviceBounds(gd)); } return bounds; } public static double getScaleFactor(int iMasterSize, int iTargetSize) { double dScale = 1; dScale = (double) iTargetSize / (double) iMasterSize; return dScale; } public static double getScaleFactorToFit(Dimension original, Dimension toFit) { double dScale = 1d; if (original != null && toFit != null) { double dScaleWidth = getScaleFactor(original.width, toFit.width); double dScaleHeight = getScaleFactor(original.height, toFit.height); dScale = Math.min(dScaleHeight, dScaleWidth); } return dScale; } }