拖放功能与绘制矩形C＃.NET - 表格 [英] Drag and Drop Function with Drawing Rectangle C# .net - Forms

问题描述

我想拖，我已经画在形式下降。这里是我的绘制矩形代码。一个能正常工作。

I want to drag and drop that I have drawn on the forms. Here is my code for drawing the rectangle. An this works fine.

        Rectangle rec = new Rectangle(0, 0, 0, 0);

        public Form1()
        {
            InitializeComponent();
            this.DoubleBuffered = true;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            e.Graphics.FillRectangle(Brushes.Aquamarine, rec);
        }
        protected override void OnMouseDown(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                rec = new Rectangle(e.X, e.Y, 0, 0);
                Invalidate();
            }
        }
        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                rec.Width = e.X - rec.X;
                rec.Height = e.Y - rec.Y;
                Invalidate();
            }
        }

现在我想拖放矩形中不同的地方。

Now I want to drag and drop that rectangle in to a different place.

请帮助如何做到这一点。

Pls help How to do that

感谢您

YOHAN

推荐答案

我写的这些东西一个辅助类：

I have written a helper class for this kind of stuff:

class ControlMover
{
    public enum Direction
    {
        Any,
        Horizontal,
        Vertical
    }

    public static void Init(Control control)
    {
        Init(control, Direction.Any);
    }

    public static void Init(Control control, Direction direction)
    {
        Init(control, control, direction);
    }

    public static void Init(Control control, Control container, Direction direction)
    {
        bool Dragging = false;
        Point DragStart = Point.Empty;
        control.MouseDown += delegate(object sender, MouseEventArgs e)
        {
            Dragging = true;
            DragStart = new Point(e.X, e.Y);
            control.Capture = true;
        };
        control.MouseUp += delegate(object sender, MouseEventArgs e)
        {
            Dragging = false;
            control.Capture = false;
        };
        control.MouseMove += delegate(object sender, MouseEventArgs e)
        {
            if (Dragging)
            {
                if (direction != Direction.Vertical)
                    container.Left = Math.Max(0, e.X + container.Left - DragStart.X);
                if (direction != Direction.Horizontal)
                    container.Top = Math.Max(0, e.Y + container.Top - DragStart.Y);
            }
        };
    }
}  

然后我初始化它在我的窗体加载事件我的控制：

Then I just Initialize it in my form load event with my control:

ControlMover.Init(myControl, myContainer, ControlMover.Direction.Any);  

好了，你没有控制移动。这是一个矩形。但我们希望，你会得到的想法结果
更新：你检查出这个页面中列出的相关问题？尝试：结果
拖放在C＃中下降矩形

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