[英]Prevent JPopupMenu from closing when ALT is pressed
希望有人可以提供幫助。 我想對來自swingbits的JTables使用過濾器 。 我想利用buildin機會通過正則表達式過濾不同的項目。 最大的問題是,似乎無法輸入| (管道)在搜索字段中。 彈出窗口(基於JPopupmenu)始終在按Alt-Gr時關閉。 我試圖刪除Alt-Gr的鍵綁定,但沒有任何效果。 似乎在里面很深的地方。 任何想法如何解決這個問題? 提前致謝。 朱莉安
看起來像Windows L&F的功能,它在Java源代碼中很深。 但是我找到了另一個解決方案。
import java.awt.Color;
import java.awt.Window;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JWindow;
import javax.swing.Popup;
import javax.swing.PopupFactory;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.border.LineBorder;
public class PopupTest implements Runnable {
private Popup popup;
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
JFrame frm = new JFrame("Popup test");
JLabel label = new JLabel("Click somewhere right mouse button to get a popup");
label.setHorizontalAlignment(SwingConstants.CENTER);
label.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (SwingUtilities.isRightMouseButton(e)) {
if (popup != null) {
popup.hide();
}
JTextField field = new JTextField(10);
JLabel lbl = new JLabel("Enter text here: ");
JPanel p = new JPanel();
p.add(lbl);
p.add(field);
p.setBorder(new LineBorder(Color.BLACK));
popup = PopupFactory.getSharedInstance().getPopup(label, p, e.getXOnScreen(), e.getYOnScreen());
// we need some logic for a heavy-weight popup
Window win = SwingUtilities.windowForComponent(p);
if (win instanceof JWindow) {
// if heavy weight make the window focusable
win.setFocusableWindowState(true);
// and install focus listener to hide popup when it lost focus
win.addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowLostFocus(WindowEvent e) {
if (popup != null) {
popup.hide();
}
}
@Override
public void windowGainedFocus(WindowEvent e) {
// TODO Auto-generated method stub
}
});
}
popup.show();
field.requestFocus();
}
}
});
frm.addWindowListener(new WindowAdapter() {
@Override
public void windowDeactivated(WindowEvent e) {
if (popup != null) {
popup.hide();
}
}
});
frm.add(label);
frm.setSize(500, 200);
frm.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frm.setLocationRelativeTo(null);
frm.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new PopupTest());
}
}
在文本字段中,我可以使用“ Alt Gr”鍵而不關閉彈出窗口。
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