Question

我正在编写一段代码来显示从数据库中检索到的JXTable中的图像。一切都是罚款。我已经修复了该表的行高，现在我想用鼠标动态改变行高。

如何实现这一点。

我知道setRowHeight（100）将如何动态地将值传递给它。

非常感谢

Answer 1

以前是我在网络上发现的一些代码：

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.MouseInputAdapter;
import java.awt.*;
import java.awt.event.MouseEvent;

public class TableRowResizer extends MouseInputAdapter
{
    public static Cursor resizeCursor = Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR);

    private int mouseYOffset, resizingRow;
    private Cursor otherCursor = resizeCursor;
    private JTable table;

    public TableRowResizer(JTable table){
        this.table = table;
        table.addMouseListener(this);
        table.addMouseMotionListener(this);
    }

    private int getResizingRow(Point p){
        return getResizingRow(p, table.rowAtPoint(p));
    }

    private int getResizingRow(Point p, int row){
        if(row == -1){
            return -1;
        }
        int col = table.columnAtPoint(p);
        if(col==-1)
            return -1;
        Rectangle r = table.getCellRect(row, col, true);
        r.grow(0, -3);
        if(r.contains(p))
            return -1;

        int midPoint = r.y + r.height / 2;
        int rowIndex = (p.y < midPoint) ? row - 1 : row;

        return rowIndex;
    }

    public void mousePressed(MouseEvent e){
        Point p = e.getPoint();

        resizingRow = getResizingRow(p);
        mouseYOffset = p.y - table.getRowHeight(resizingRow);
    }

    private void swapCursor(){
        Cursor tmp = table.getCursor();
        table.setCursor(otherCursor);
        otherCursor = tmp;
    }

    public void mouseMoved(MouseEvent e){
        if((getResizingRow(e.getPoint())>=0)
           != (table.getCursor() == resizeCursor)){
            swapCursor();
        }
    }

    public void mouseDragged(MouseEvent e){
        int mouseY = e.getY();

        if(resizingRow >= 0){
            int newHeight = mouseY - mouseYOffset;
            if(newHeight > 0)
            {
                table.setRowHeight(resizingRow, newHeight);
            }
        }
    }
}

使用以下方法将其添加到您的表中：

new TableRowResizer( table );

如何调整JXTable的行高

1 个答案: