好的家伙我有问题,我不知道怎么知道在网格布局上点击了哪个单元格,是否有任何功能?
我在容器上有网格布局,包含10行和10列,我想要的是所有单元格的鼠标监听器,所以当我单击单元格(2,1)时,它会说我点击了哪个单元格,因为老鼠听众。
任何线索?非常感谢
答案 0 :(得分:8)
将MouseListener添加到使用GridLayout并保存网格中组件的Container。然后在mousePressed上使用MouseEvent对象,比如名为myMouseEvent来获取点击的点,并调用getComponentAt(myMouseEvent.getPoint);
来获取被点击的组件。没有麻烦没事。
例如:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.*;
public class TestComponentAt extends JPanel {
private static final int ROW_COUNT = 10;
private static final int W = 60;
private static final int H = W;
private static final Dimension PREF_SIZE = new Dimension(W, H);
protected static final Color SELECTION_COLOR = Color.pink;
private JPanel selectedPanel = null;
private Color originalColor = null;
public TestComponentAt() {
setLayout(new GridLayout(ROW_COUNT, ROW_COUNT, 1, 1));
setBackground(Color.black);
for (int i = 0; i < ROW_COUNT * ROW_COUNT; i++) {
JPanel panel = new JPanel();
String name = String.format("[%d, %d]",
i / ROW_COUNT, i % ROW_COUNT);
panel.setName(name);
if (i == 0) {
originalColor = panel.getBackground();
}
panel.setPreferredSize(PREF_SIZE);
add(panel);
}
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
JPanel panel = (JPanel) getComponentAt(e.getPoint());
if (panel == null || panel == TestComponentAt.this) {
return;
}
if (selectedPanel != null) {
selectedPanel.setBackground(originalColor);
selectedPanel.removeAll();
selectedPanel.revalidate();
selectedPanel.repaint();
}
selectedPanel = panel;
selectedPanel.setBackground(SELECTION_COLOR);
selectedPanel.add(new JLabel(selectedPanel.getName()));
selectedPanel.revalidate();
selectedPanel.repaint();
}
});
}
private static void createAndShowGui() {
JFrame frame = new JFrame("TestComponentAt");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new TestComponentAt());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
答案 1 :(得分:0)
您可以使用宽度和容器的高度,获取容器高度的宽度并将其除以单元格数并找到单元格的范围(2,1),例如,如果宽度和高度为容器等于100和行数,列= 10 * 10然后单元格(2,1)的左坐标是x = 10,y = 0并且通过方法getX()和mouseListener类的getY(),你找到单击鼠标的位置,然后如果鼠标位于单元格(2,1)范围内的x和y,则可以知道它单击了单元格(2,1)。
答案 2 :(得分:-1)
以递归方式将mouselistener添加到UI中的所有组件并进行调试......