isMetaDown方法在JavaSE14中不适用于处理鼠标事件
扩展JFrame的类的主体isMetaDown方法在JavaSE14中不适用于处理鼠标事件,java,swing,mouseevent,Java,Swing,Mouseevent,扩展JFrame的类的主体 import java.awt.BorderLayout; import java.awt.event.MouseEvent; import java.awt.event.MouseAdapter; import javax.swing.JFrame; import javax.swing.JLabel; public class MouseDetailsFrame extends JFrame { private final JLabel statusJ
import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class MouseDetailsFrame extends JFrame {
private final JLabel statusJLabel;
public MouseDetailsFrame() {
super("Mouse Adapter example");
statusJLabel = new JLabel("You clicked 0 times");
add(statusJLabel, BorderLayout.SOUTH);
addMouseListener(new MouseAdapterHandler());
}
private class MouseAdapterHandler extends MouseAdapter {
@Override
public void mouseClicked(MouseEvent event) {
int posX = event.getX();
int posY = event.getY();
String details = String.format("You clicked %d time(s) ", event.getClickCount());
if (event.isMetaDown() == true)
details += "with Right Mouse Button";
else if (event.isAltDown() == true)
details += "with center Mouse Button";
else
details += "with Left Mouse Button";
statusJLabel.setText(details + String.format(" at ( %d, %d )", posX, posY));
}
}
}
包含主方法的驱动程序类:
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.JFrame;
public class MouseEventTest {
public static void main(String[] args) {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
}
}
} catch (Exception e) {
e.printStackTrace();
}
MouseDetailsFrame mouseDetailsFrame = new MouseDetailsFrame();
mouseDetailsFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mouseDetailsFrame.setSize(400, 200);
mouseDetailsFrame.setVisible(true);
}
}
每当我按下任何鼠标按钮时,程序只注册为左键。
但是,按住alt键的同时按下鼠标左键可以模拟鼠标中键。
我不太明白,我有一个3个按钮的鼠标,按下每个按钮不会导致JVM生成不同的鼠标事件吗
我有一个3个按钮的鼠标,按下每个按钮不会导致JVM生成不同的鼠标事件吗*
也许你正在寻找:
SwingUtilities.isLeftMouseButton(事件)
SwingUtilities.isMiddleMouseButton(事件)
SwingUtilities.isRightButton(事件)
SwingUtilities.isLeftMouseButton(事件)
SwingUtilities.isMiddleMouseButton(事件)
SwingUtilities.isRightButton(事件)
那么,isAltDown()和isMetaDown()的用途是什么?您将它们组合使用以查看是否单击了鼠标并按下了Alt键。那么,isAltDown()和isMetaDown()的用途是什么?您将它们组合使用以查看是否单击了鼠标并按下了Alt键。