如何绘制和移动在C＃中使用鼠标的形状 [英] How to draw and move shapes using mouse in C#

问题描述

我是新来的C＃编程，想索要一点点帮助。目前，我试图移动一个颜色填充矩形，我用我的鼠标左键Windows应用程序窗体上绘制，而我试图拖动和拖放使用我的鼠标右键另一个位置。目前我已经成功地绘制矩形，但右键点击被拖着整个表格

下面是我的代码：

 公共部分Form1类：表格
 {
私人点MouseDownLocation; 
 
公共Form1中（）
 {
的InitializeComponent（）; 
 this.DoubleBuffered = TRUE; 
} 
矩形REC =新的Rectangle（0，0，0，0）; 
 
保护覆盖无效的OnPaint（PaintEventArgs的E）
 {
 e.Graphics.FillRectangle（Brushes.DeepSkyBlue，REC）; 
} 
 
 
保护覆盖无效onmousedown事件（MouseEventArgs E）
 {
如果（e.Button == MouseButtons.Left）
 { 
 REC =新的Rectangle（例如，EY，0，0）; 
的Invalidate（）; 
 
} 
如果（e.Button == MouseButtons.Right）
 {
 MouseDownLocation = e.Location; 
} 
} 
保护覆盖无效的OnMouseMove（MouseEventArgs E）
 {
 
如果（e.Button == MouseButtons.Left）
 {
 rec.Width =的eX  -  rec.X; 
 rec.Height = e.Y  -  rec.Y; 
的Invalidate（）; 
} 
 
如果（e.Button == MouseButtons.Right）
 {
 this.Left = e.X + this.Left  -  MouseDownLocation.X; 
 this.Top = e.Y + this.Top  -  MouseDownLocation.Y; 
 
} 
} 
 
} 
  

我只需要拖动和删除用鼠标右键矩形

修改：谢谢你我的一切我的回答速度非常快，这里有一个工作的代码：

 公共部分Form1类：表格
 {
私人点MouseDownLocation; 
 
公共Form1中（）
 {
的InitializeComponent（）; 
 this.DoubleBuffered = TRUE; 
} 
 
矩形REC =新的Rectangle（0，0，0，0）; 
 
保护覆盖无效的OnPaint（PaintEventArgs的E）
 {
 e.Graphics.FillRectangle（Brushes.DeepSkyBlue，REC）; 
 //生成形状
} 
 
保护覆盖无效onmousedown事件（MouseEventArgs E）
 {
如果（e.Button == MouseButtons.Left） 
 //也可以用这一个：
 //如果（e.Button == System.Windows.Forms.MouseButtons.Left）
 {
建议=新的Rectangle（前，EY，0，0）; 
的Invalidate（）; 
 
} 
如果（e.Button == MouseButtons.Right）
 {
 MouseDownLocation = e.Location; 
} 
} 
保护覆盖无效的OnMouseMove（MouseEventArgs E）
 {
如果（e.Button == MouseButtons.Left）
 {
 rec.Width =的eX  -  rec.X; 
 rec.Height = e.Y  -  rec.Y; 
 this.Invalidate（）; 
} 
 
如果（e.Button == MouseButtons.Right）
 {
 rec.Location =新的点（（前 -  MouseDownLocation.X）+ REC。左，（EY  -  MouseDownLocation.Y）+ rec.Top）; 
 MouseDownLocation = e.Location; 
 this.Invalidate（）; 
} 
} 
 
} 
  

解决方案

这似乎是工作。

 保护覆盖无效的OnMouseMove（MouseEventArgs E）
 {
 
 
如果（e.Button == MouseButtons.Left）
 {
 rec.Width =的eX  -  rec.X; 
 rec.Height = e.Y  -  rec.Y; 
 this.Invalidate（）; 
} 
 
如果（e.Button == MouseButtons.Right）
 {
 rec.Location =新的点（（EX-MouseDownLocation.X）+ REC。左，（EY-MouseDownLocation.Y）+ rec.Top）; 
 MouseDownLocation = e.Location; 
 this.Invalidate（）; 
} 
} 
  

I'm new to programming in C# and wanted to ask for a little bit of help. I'm currently trying to move a color-filled rectangle that I draw on a Windows Application form with my left mouse button, and I'm trying to drag-and-drop it to another location using my right mouse button. Currently I've managed to draw the rectangle, but the right click is dragging the entire form along.

Here's my code:

public partial class Form1 : Form
{
    private Point MouseDownLocation;

    public Form1()
    {
        InitializeComponent();
        this.DoubleBuffered = true;
    }
    Rectangle rec = new Rectangle(0, 0, 0, 0);

    protected override void OnPaint(PaintEventArgs e)
    {   
        e.Graphics.FillRectangle(Brushes.DeepSkyBlue, rec);
    }


    protected override void OnMouseDown(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left) 
        {
            rec = new Rectangle(e.X, e.Y, 0, 0);
            Invalidate();

        }
        if (e.Button == MouseButtons.Right)
        {
            MouseDownLocation = e.Location;
        }
    }
    protected override void OnMouseMove(MouseEventArgs e)
    {             

        if (e.Button == MouseButtons.Left)
        {
            rec.Width = e.X - rec.X;
            rec.Height = e.Y - rec.Y;
            Invalidate();
        }

        if (e.Button == MouseButtons.Right)
        {
            this.Left = e.X + this.Left - MouseDownLocation.X;
            this.Top = e.Y + this.Top - MouseDownLocation.Y;

        }
    }

}

I only need to drag-and-drop the rectangles with right mouse button.

EDIT: Thanks to you all i got my answer very fast and here's the code that works:

public partial class Form1 : Form
{
    private Point MouseDownLocation;

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

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

    protected override void OnPaint(PaintEventArgs e)
    {
        e.Graphics.FillRectangle(Brushes.DeepSkyBlue, rec);
        //Generates the shape            
    }

    protected override void OnMouseDown(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        //can also use this one:
        //if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            rec = new Rectangle(e.X, e.Y, 0, 0);
            Invalidate();

        }
        if (e.Button == MouseButtons.Right)
        {
            MouseDownLocation = e.Location;
        }
    }
    protected override void OnMouseMove(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            rec.Width = e.X - rec.X;
            rec.Height = e.Y - rec.Y;
            this.Invalidate();
        }

        if (e.Button == MouseButtons.Right)
        {
            rec.Location = new Point((e.X - MouseDownLocation.X) + rec.Left, (e.Y - MouseDownLocation.Y) + rec.Top);
            MouseDownLocation = e.Location;
            this.Invalidate();
        }
    }

}

解决方案

This seems to work

    protected override void OnMouseMove(MouseEventArgs e)
    {


        if (e.Button == MouseButtons.Left)
        {
            rec.Width = e.X - rec.X;
            rec.Height = e.Y - rec.Y;
            this.Invalidate();
        }

        if (e.Button == MouseButtons.Right)
        {
            rec.Location = new Point((e.X-MouseDownLocation.X) + rec.Left, (e.Y-MouseDownLocation.Y) + rec.Top);
            MouseDownLocation = e.Location;
            this.Invalidate();
        }
    }

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