C#画图小程序.doc

图像编辑软件班级：网工1班 姓名：张田新 学号：1225114042 完成日期：2014.05.16一、需求分析a) 画线类型，即绘图时所采用的线型，包括：实线、点线、长划线、点划线、双点划线等b) 绘图类型，即不同的绘图形状，包括：直线、椭圆、矩形c) 填充类型，即画刷模式下的形状填充，包括：实心、十字、斜纹等d) 画线颜色修改（按钮控件），弹出ColorDialoge) 清空按钮（按钮控件）f) 画线宽度（NumericUpDown控件）g) 画刷模式（复选框控件）h) 状态栏（在绘画时显示当前光标所处坐标位置）i) 其它：组合框、控件标题属性等二、框架设计1、窗口Form1 public partial class MainForm : Form public MainForm() InitializeComponent(); Form2public partial class Form2 : Form public Form2() InitializeComponent(); 2、设定数据类型定义：Pen MyPen = new System.Drawing.Pen(System.Drawing.Color.SaddleBrown, 2);/定义画笔，并且初始化颜色和宽度 PointF pStart;/开始点坐标 PointF pEnd;/结束点坐标 PointF pWork;/移动点坐标 Boolean working;/运动中 Boolean brushmode;/画刷 String dmode = line; ColorDialog ColorDialog1 = new ColorDialog();/颜色对话框 Bitmap myBitmap = new Bitmap(194, 294);/ 位图上绘制图形,创建位图，大小为PictureBox1的尺寸 private int tickcounts;/计时器3、基本操作：Form1:自定义DrawShape函数，用于实现画图类型的实现void DrawShape（)MainForm_Load用于初始化绘图类型和画笔颜色private void MainForm_Load(object sender, EventArgs e)在PictureBox1中添加MouseDown事件，用于记录绘图的起点private void PictureBox1_MouseDown_1(object sender, MouseEventArgs e)在PictureBox1中添加MouseMove事件，显示鼠标的位置，并画连续线private void PictureBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)在PictureBox1中添加MouseUp事件，用于设置绘图终点并开始绘图private void PictureBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)button1的Click事件，用于设置画笔颜色，显示颜色对话框private void button1_Click(object sender, EventArgs e)BtnClear的Click事件,用PictureBox1的背景颜色清空绘图区域和位图private void BtnClear_Click(object sender, EventArgs e)checkBox2_CheckedChanged事件，用于设置启动定时器private void checkBox2_CheckedChanged_1(object sender, EventArgs e)在定时器控件Tick事件中添加响应代码，用于改变状态栏颜色private void timer1_Tick_1(object sender, EventArgs e)右键剪切功能private void cutToolStripMenuItem_Click(object sender, EventArgs e)右键粘贴功能private void pasteToolStripMenuItem_Click(object sender, EventArgs e)右键清空功能private void clearToolStripMenuItem_Click(object sender, EventArgs e)右键保存，需要先添加saveFileDialog对话框，显示该对话框private void saveFileDialog2_FileOk(object sender, CancelEventArgs e)右键about点击事件，显示新的窗体，需要新建Form2private void aboutToolStripMenuItem_Click(object sender, EventArgs e)给pctureBox1添加paint事件，使窗口重绘后内容不消失private void pictureBox1_Paint(object sender, PaintEventArgs e)Form2:Label控件、panellinkLabel1_LinkClicked用于点击链接相应的网址三、实现细节private void PictureBox1_MouseUp(object sender, MouseEventArgs e) if (e.Button = MouseButtons.Left) if (working = true) pEnd.X = e.X; pEnd.Y = e.Y; MyPen.Color = button1.BackColor; MyPen.Width = (int)numericUpDown1.Value; brushmode = checkBox1.Checked;/a)画线类型，即绘图时所采用的线型，包括：实线、点线、长划线、点划线、双点划线等 if (rbShiline.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Solid; if (rbDianline.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot; if (rbChanghualine.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash; if (rbZidingyi.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Custom; if (rbShuangdianline.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDotDot; if (rbDianhualine.Checked = true) MyPen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDot;/b)绘图类型，即不同的绘图形状，包括：直线、椭圆、矩形 if (rbZhiline.Checked = true) dmode = line; if (rbTuoyuan.Checked = true) dmode = circle; if (rbJuxing.Checked = true) dmode = rect; if (rbXiewen.Checked = true) MyPen.Brush = new System.Drawing.Drawing2D.HatchBrush( System.Drawing.Drawing2D.HatchStyle.DarkDownwardDiagonal, MyPen.Color);/c)填充类型，即画刷模式下的形状填充，包括：实心、十字、斜纹等 if (rbShizi.Checked = true) MyPen.Brush = new System.Drawing.Drawing2D.HatchBrush( System.Drawing.Drawing2D.HatchStyle.Cross, MyPen.Color); if (rbShixin.Checked = true) MyPen.Brush = new SolidBrush(MyPen.Color); DrawShape(PictureBox1.CreateGraphics(), pStart, pEnd, brushmode, MyPen, dmode); working = false; Case：画直线switch (dmode) case line: g.DrawLine(MyPen, pStart, pEnd); e.DrawLine(penmode, startp.X, startp.Y, endp.X, endp.Y); break;case:矩形：case rect:/当第二点的X或Y坐标小于第一点时，矩形无法绘制的问题（bug） if (int)endp.Y (int)startp.Y & (int)endp.X (int)startp.X) if (brushmode = true) g.FillRectangle(MyPen.Brush, rect1); e.FillRectangle(penmode.Brush, rect1); else g.DrawRectangle(MyPen, rect1); e.DrawRectangle(penmode, rect1); /当第二点的Y坐标小于第一点时，矩形无法绘制的问题 if (int)endp.Y (int)startp.X) if (brushmode = true) g.FillRectangle(MyPen.Brush, rect2); e.FillRectangle(penmode.Brush, rect2); else g.DrawRectangle(MyPen, rect2); e.DrawRectangle(penmode, rect2); /当第二点的X坐标小于第一点时，矩形无法绘制的问题 if (int)endp.Y (int)startp.Y & (int)endp.X (int)startp.X) if (brushmode = true) g.FillRectangle(MyPen.Brush, rect3); e.FillRectangle(penmode.Brush, rect3); else g.DrawRectangle(MyPen, rect3); e.DrawRectangle(penmode, rect3); /当第二点的X和Y坐标小于第一点时，矩形无法绘制的问题 if (int)endp.Y (int)startp.Y & (int)endp.X (int)startp.X) if (brushmode = true) g.FillRectangle(MyPen.Brush, rect4); e.FillRectangle(penmode.Brush, rect4); else g.DrawRectangle(MyPen, rect4); e.DrawRectangle(penmode, rect4); break;case画椭圆： case circle: if (brushmode = true) g.FillEllipse(MyPen.Brush, rect1); e.FillEllipse(penmode.Brush, rect1); else g.DrawEllipse(MyPen, rect1); e.DrawEllipse(penmode, rect1); break;d)画线颜色修改（按钮控件），弹出ColorDialogprivate void button1_Click_1(object sender, EventArgs e) ColorDialog1.ShowDialog(); button1.BackColor = ColorDialog1.Color; e)清空按钮（按钮控件）private void BtnClear_Click(object sender, EventArgs e) PictureBox1.CreateGraphics().Clear(PictureBox1.BackColor); Graphics g = Graphics.FromImage(myBitmap); g.Clear(PictureBox1.BackColor); f)画线宽度（NumericUpDown控件） MyPen.Width = (int)numericUpDown1.Value;g)画刷模式（复选框控件）if (brushmode = true) g.FillRectangle(MyPen.Brush, rect1);/利用位图画矩形 e.FillRectangle(penmode.Brush, rect1); h)状态栏（在绘画时显示当前光标所处坐标位置）private void checkBox2_CheckedChanged_1(object sender, EventArgs e) tickcounts = 0; if (checkBox2.Checked = true) timer1.Start();/启动定时器 timer1.Enabled = true; private void timer1_Tick(object sender, EventArgs e) if (tickcounts % 4 = 0)/第一个颜色 statusStrip1.BackColor = arrColor0; if (tickcounts % 4 = 1) statusStrip1.BackColor = arrColor1; arrColor0.ToString(); if (tickcounts % 4 = 2) statusStrip1.BackColor = arrColor2; if (tickcounts % 4 = 3) statusStrip1.BackColor = arrColor3; arrColor1.ToString(); tickcounts+; j) 其它：组合框、控件标题属性等2. 教材原例Bug修改（15分）a) 窗口刷新后图像消失问题/给pctureBox1添加paint事件，使窗口重绘后内容不消失 private void PictureBox1_Paint(object sender, PaintEventArgs e) e.Graphics.DrawImage(myBitmap, 0, 0); b) 画矩形：当第二点的X或Y坐标小于第一点时，矩形无法绘制的问题当第二点的Y坐标小于第一点时，矩形无法绘制的问题 Rectangle rect2 = new Rectangle(int)startp.X, (int)endp.Y, (int)(endp.X - startp.X), (int)(startp.Y - endp.Y); if (int)endp.Y (int)startp.X) if (brushmode = true) g.FillRectangle(MyPen.Brush, rect2); e.FillRectangle(penmode.Brush, rect2); else g.DrawRectangle(MyPen, rect2); e.DrawRectangle(penmode, rect2); 其他两种情况类似处理，这里不再赘述c) 鼠标的响应：左键右键均响应，应修改为仅响应鼠标左键进行绘图操作例如：if (e.Button = MouseButtons.Left) /仅响应鼠标左键 working = true; pStart.X = e.X; pStart.Y = e.Y; toolStripStatusLabel1.Text = + e.X + , + e.Y + ; d) 初始颜色问题，原初始颜色与背景色相同，无法显示图像Pen MyPen = new System.Drawing.Pen(System.Drawing.Color.SaddleBrown, 2);System.Drawing.Drawing2D.HatchStyle.DarkDownwardDiagonal, Color.SaddleBrown);e) 清空功能：用原PictureBox背景来清空而不用Color属性所代表的颜色来清空绘图区 private void BtnClear_Click_1(object sender, EventArgs e) PictureBox1.CreateGraphics().Clear(PictureBox1.BackColor);/清空绘图区域 Graphics g = Graphics.FromImage(myBitmap); g.Clear(PictureBox1.BackColor);/清空位图 3. 特色功能a) 连续线：即通常采用的画笔画出连续线条（20分） /在PictureBox1中添加MouseMove事件，显示鼠标的位置，并画连续线 private void PictureBox1_MouseMove(object sender, MouseEventArgs e) Graphics g = Graphics.FromImage(myBitmap);/位图 Graphics h = PictureBox1.CreateGraphics(); if (e.Button = MouseButtons.Left) if (working = true) pWork.X = e.X; pWork.Y = e.Y; toolStripStatusLabel1.Text = + e.X + , + e.Y + ; if (rbLianxuline.Checked = true) /画连续线 g.DrawLine(MyPen, pStart, pWork); /位图 h.DrawLine(MyPen, pStart.X, pStart.Y, pWork.X, pWork.Y); /pictureBox1 pStart.X = pWork.X;/将上一个终点作为新的起点 pStart.Y = pWork.Y; b) timer复选框：实现间隔的改变状态条背景色（10分） /checkBox2_CheckedChanged事件，用于设置启动定时器private void checkBox2_CheckedChanged_1(object sender, EventArgs e) tickcounts = 0; if (checkBox2.Checked = true) timer1.Start();/启动定时器 timer1.Enabled = true; /改变复选框颜色 private void timer1_Tick(object sender, EventArgs e) if (tickcounts % 4 = 0)/第一?个?颜?色? statusStrip1.BackColor = arrColor0; if (tickcounts % 4 = 1) statusStrip1.BackColor = arrColor1; arrColor0.ToString(); if (tickcounts % 4 = 2) statusStrip1.BackColor = arrColor2; if (tickcounts % 4 = 3) statusStrip1.BackColor = arrColor3; arrColor1.ToString(); tickcounts+; c) 右键弹出上下文菜单：剪切：完成剪切图像功能（5分）/-右键的剪切功能- private void cutToolStripMenuItem_Click(object sender, EventArgs e) Clipboard.SetDataObject(myBitmap, true); PictureBox1.CreateGraphics().Clear(PictureBox1.BackColor);/pictureBox1绘图区域清空 Graphics g = Graphics.FromImage(myBitmap); g.Clear(PictureBox1.BackColor);/位图清空 粘贴：完成图像粘贴（5分）/-右键粘贴功能- private void pasteToolStripMenuItem_Click(object sender, EventArgs e) IDataObject clipboard_data; clipboard_data