如何启用和禁用拖动按钮？

Question

我有一个表格。在此表单上有一个按钮和一个面板。两者都有相同的父对象：表单。我希望能够启用或禁用按钮的拖动操作。我正在使用的代码是：

ObjectMapper mapper = new ObjectMapper();
Class<?> view = Pojo.Response2.class;  // runtime assignment of view
mapper.writerWithView(view).writeValue(System.out, pojo);

即使我有以下声明：this.AllowDrop = false; ，panel1.AllowDrop = false;和button1.Draggable（false）;以及应该禁止拖动的重写void WndProc方法， button1始终是可拖动的。

Answer 1

我因此更改了事件处理程序：

private void button1_MouseDown(object sender, MouseEventArgs e)
    {
        if (sender is Button)
        {
            Button senderButton = (Button)sender;
            if (enableDragOperations)
            {
                if (e.Button == MouseButtons.Left)
                {
                    isDragged = true;
                    Point ptStartPosition = senderButton.PointToScreen(new Point(e.X, e.Y));

                    pointOffset = new Point();
                    pointOffset.X = senderButton.Location.X - ptStartPosition.X;
                    pointOffset.Y = senderButton.Location.Y - ptStartPosition.Y;
                }
                else
                {
                    isDragged = false;
                }
            }
        }
    }

    private void button1_MouseMove(object sender, MouseEventArgs e)
    {
        if (sender is Button)
        {
            Button senderButton = (Button)sender;
            if (enableDragOperations)
            {
                if (isDragged)
                {
                    Point newPoint = senderButton.PointToScreen(new Point(e.X, e.Y));
                    newPoint.Offset(pointOffset);
                    senderButton.Location = newPoint;
                }
            }
        }
    }

    private void button1_MouseUp(object sender, MouseEventArgs e)
    {
        if (sender is Button)
        {
            Button senderButton = (Button)sender;
            if (enableDragOperations)
            {
                Point newPoint = senderButton.PointToScreen(new Point(e.X, e.Y));
                isDragged = false;
            }
        }
    }

我定义了一个全局字段：bool enableDragOperations并将其设置为false。