Question

我正在尝试获取以下代码以显示info_panel中的坐标，但它无法正常工作。如何从SimpleFrameViewWidget中获取mouseListener的坐标以显示在info_panel中？我现在正在使用setText ...谢谢！

public static void main(String[] args) throws IOException {
    Frame f = A7Helper.readFromURL("http://www.cs.unc.edu/~kmp/kmp.jpg");
    f.setTitle("");
    SimpleFrameViewWidget simple_widget = new SimpleFrameViewWidget(f);

    JFrame main_frame = new JFrame();
    main_frame.setTitle("Assignment 7 Pixel Inspector");
    main_frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel top_panel = new JPanel();
    top_panel.setLayout(new BorderLayout());
    top_panel.add(simple_widget, BorderLayout.CENTER);
    main_frame.setContentPane(top_panel);


    JPanel info_panel = new JPanel();
    info_panel.setLayout(new BorderLayout());
    top_panel.add(info_panel, BorderLayout.SOUTH);



    JLabel x_label = new JLabel("");
    x_label.setHorizontalAlignment(SwingConstants.CENTER);
    x_label.addMouseListener(simple_widget);
    x_label.setText(simple_widget.getStringInfo());
    info_panel.add(x_label);


    main_frame.setContentPane(top_panel);
    main_frame.pack();
    main_frame.setVisible(true);
}

这是包含mouseListener和mouseClick的代码。提前谢谢！

public class SimpleFrameViewWidget extends JPanel implements MouseListener {

private FrameView frame_view;
private String stringInfo;


public SimpleFrameViewWidget(Frame f) {
    setLayout(new BorderLayout());

    frame_view = new FrameView(f);
    frame_view.addMouseListener(this);
    add(frame_view, BorderLayout.CENTER);

    JLabel title_label = new JLabel(f.getTitle());
    add(title_label, BorderLayout.SOUTH);
}

@Override
public void mouseClicked(MouseEvent e) {
    int x = e.getX();
    int y = e.getY();

    stringInfo = "X: " + x + "Y: " + y;
}

public String getStringInfo(){
    return stringInfo;
}

Answer 1

你可以......

将另一个MouseListener注册到SimpleFrameViewWidget只需将结果直接提供给info_panel或让info_panel为您完成所有操作....

如何在JPanel中显示鼠标坐标？

1 个答案:

你可以......