Picture上画 (有点闪动，以后再想办法)
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
this.Load += Form2_Load;
}
private void Form2_Load(object sender, EventArgs e)
{
//bmpOriginal = new Bitmap(@"F:\test_netcore\ConsoleApp3\img\202205271132367.jpg");
//bmp = new Bitmap(@"F:\test_netcore\ConsoleApp3\img\202205271132367.jpg");
bmp = Properties.Resources._202205271132367A;
//pictureBox1.Image = bmp;
//g = Graphics.FromImage(bmp);
g = pictureBox1.CreateGraphics();
gBmp = Graphics.FromImage(bmp);
pen = new Pen(Color.Black);
pen.Width = 3;
pen.Color = Color.Blue;
//pen2 = new Pen(this.BackColor);
pen2 = new Pen(pictureBox1.BackColor);
pen2.Width = 3;
points = new List<Point>();
pointsArr = new List<List<Point>>();
pictureBox1.Image = bmp;
}
bool startFlag = false;
bool cancelFalg = true;
Point point1, point2;
List<Point> points, points_dc; //points_dc用作深拷贝
List<List<Point>> pointsArr;
Graphics g, gBmp;
Pen pen, pen2;
Bitmap bmp, bmpOriginal;
//Color bmpForeColor;
private void button1_Click(object sender, EventArgs e)
{
if (cancelFalg)
{
this.button1.Text = "不画了";
cancelFalg = false;
startFlag = false;
//points.Clear();
if (points.Count > 0)
{
pointsArr.Add(points);
points.Clear();
}
}
else
{
this.button1.Text = "开始画";
cancelFalg = true;
}
}
private void button2_Click(object sender, EventArgs e)
{
pictureBox1.Image = bmp;
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
//this.pictureBox1.Refresh();
}
private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
{
if (cancelFalg) return;
if (e.Button == MouseButtons.Left)
{
if (!startFlag) //第一次按下鼠标
{
startFlag = true;
point1 = e.Location;
points.Add(point1);
}
else //第二次按下鼠标
{
point2 = e.Location;
g.DrawLine(pen, point1, point2);
//也写到图片中去
gBmp.DrawLine(pen, point1, point2);
points.Add(point2);
point1 = e.Location;
}
}
else
{
if (points.Count == 0) return;
int length = points.Count;
//g.DrawLine(pen2, points[length - 1], point2); //这里不需要了, 因移动的线都没有真正画上去
startFlag = false;
if (points.Count >= 2)
{
points_dc = new List<Point>();
points_dc = Clone(points);
pointsArr.Add(points_dc);
}
points.Clear();
//右击时所有多边形重新画一遍(在picturebox上)
if (pointsArr.Count > 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
g.DrawLines(pen, pointsArr[i].ToArray());
}
}
//右击的时候也写到图片中去
if (pointsArr.Count > 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
gBmp.DrawLines(pen, pointsArr[i].ToArray());
}
}
}
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (cancelFalg) return;
if (!startFlag) return;
g.DrawLine(pen, point1, e.Location);
pictureBox1.Invalidate();
//pictureBox1.Refresh(); 或者都可以
}
public List<Point> Clone(List<Point> inputList)
{
BinaryFormatter bf = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
bf.Serialize(ms, inputList);
ms.Position = 0;
return bf.Deserialize(ms) as List<Point>;
}
}
//public <T> Clone(<T> inputList)
//{
// BinaryFormatter bf = new BinaryFormatter();
// using (MemoryStream ms = new MemoryStream())
// {
// bf.Serialize(ms, inputList);
// ms.Position = 0;
// return bf.Deserialize(ms) as List<Point>;
// }
//}
//public List<T> ListClone(List<T> inputList)
//{
// BinaryFormatter Formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Clone));
// System.IO.MemoryStream stream = new System.IO.MemoryStream();
// Formatter.Serialize(stream, inputList);
// stream.Position = 0;
// List<T> outList = Formatter.Deserialize(stream) as List<T>;
// stream.Close();
// return outList;
//}
}
窗体上画
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.Load += Form1_Load;
}
private void Form1_Load(object sender, EventArgs e)
{
g = this.CreateGraphics();
pen = new Pen(Color.Black);
pen.Width = 3;
pen.Color = Color.Blue;
pen2 = new Pen(this.BackColor);
pen2.Width = 3;
points = new List<Point>();
pointsArr = new List<List<Point>>();
}
bool startFlag = false;
bool cancelFalg = true;
Point point1, point2;
List<Point> points, points_dc; //points_dc用作深拷贝
List<List<Point>> pointsArr;
Graphics g;
Pen pen, pen2;
private void button1_Click(object sender, EventArgs e)
{
if (cancelFalg)
{
this.button1.Text = "不画了";
cancelFalg = false;
startFlag = false;
//points.Clear();
if (points.Count > 0)
{
pointsArr.Add(points);
points.Clear();
}
}
else
{
this.button1.Text = "开始画";
cancelFalg = true;
}
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (cancelFalg) return;
if (!startFlag) return;
g.DrawLine(pen2, point1, point2);
point2.X = e.X;
point2.Y = e.Y;
g.DrawLine(pen, point1, point2);
if (points.Count <= 1) //当前画的多边形只有一个点的情况下
{
//如果已经有画过多边形
if (pointsArr.Count > 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
g.DrawLines(pen, pointsArr[i].ToArray());
}
}
return;
}
g.DrawLines(pen, points.ToArray());
//如果已经有画过多边形
if (pointsArr.Count > 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
g.DrawLines(pen, pointsArr[i].ToArray());
}
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (cancelFalg) return;
if (e.Button == MouseButtons.Left)
{
if (!startFlag) //第一次按下鼠标
{
startFlag = true;
point1.X = e.X;
point1.Y = e.Y;
points.Add(point1);
}
else //第二次按下鼠标
{
point2.X = e.X;
point2.Y = e.Y;
g.DrawLine(pen, point1, point2);
points.Add(point2);
point1.X = point2.X;
point1.Y = point2.Y;
}
}
else
{
if (points.Count == 0 ) return;
int length = points.Count;
g.DrawLine(pen2, points[length - 1], point2);
startFlag = false;
if (points.Count >= 2)
{
points_dc = new List<Point>();
points_dc = Clone(points);
pointsArr.Add(points_dc);
}
points.Clear();
//右击之后再画一遍,要不然还是有涂掉一些
if (pointsArr.Count > 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
g.DrawLines(pen, pointsArr[i].ToArray());
}
}
}
}
public List<Point> Clone(List<Point> inputList)
{
BinaryFormatter bf = new BinaryFormatter();
using(MemoryStream ms = new MemoryStream())
{
bf.Serialize(ms, inputList);
ms.Position = 0;
return bf.Deserialize(ms) as List<Point>;
}
}
//public <T> Clone(<T> inputList)
//{
// BinaryFormatter bf = new BinaryFormatter();
// using (MemoryStream ms = new MemoryStream())
// {
// bf.Serialize(ms, inputList);
// ms.Position = 0;
// return bf.Deserialize(ms) as List<Point>;
// }
//}
//public List<T> ListClone(List<T> inputList)
//{
// BinaryFormatter Formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Clone));
// System.IO.MemoryStream stream = new System.IO.MemoryStream();
// Formatter.Serialize(stream, inputList);
// stream.Position = 0;
// List<T> outList = Formatter.Deserialize(stream) as List<T>;
// stream.Close();
// return outList;
//}
}
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