Phần mềm vẽ đồ thị C#

6.566 lượt xem;
1
2 using System;
3 using System.Collections.Generic;
4 using System.ComponentModel;
5 using System.Data;
6 using System.Drawing;
7 using System.Text;
8 using System.Windows.Forms;
9 using System.Collections;
10
11
12 namespace VietGraph
13 {
14     public partial class Main : Form
15     {
16         Graph form;
17         Color[] colorLevels = { Color.Red, Color.Green, Color.Blue,
18             Color.Purple, Color.Brown, Color.Orange, Color.Chocolate,
19             Color.Maroon, Color.Navy, Color.YellowGreen };
20         string[] strFunctions ={ "abs", "sin", "cos", "tan", "sec", "cosec", "cot", "arcsin",
21             "arccos", "arctan", "exp", "ln", "log", "antilog", "sqrt", "sinh", "cosh", "tanh",
22             "arcsinh", "arccosh", "arctanh" };
23
24         public Main()
25         {
26             InitializeComponent();
27         }
28
29         #region Event Handlers
30         private void Form1_Load(object sender, EventArgs e)
31         {
32             this.mode.SelectedIndex = 0;
33             this.sensitivity.Enabled = false;
34
35             this.lstExpressions.Items.Add("x");
36             this.lstExpressions.Items.Add("-x");
37             this.lstExpressions.Items.Add("x-3");
38             this.lstExpressions.Items.Add("-x-3");
39             this.lstExpressions.Items.Add("x+3");
40             this.lstExpressions.Items.Add("3-x");
41             //this.lstExpressions.Items.Add("5*(sin(x)+sin(3*x)/3+sin(5*x)/5+sin(7*x)/7+sin(9*x)/9+sin(11*x)/11+sin(13*x)/13)");
42         }
43
44         private void txtExpression_TextChanged(object sender, EventArgs e)
45         {
46             int cursorPosition = this.txtExpression.SelectionStart;
47             WriteText(this.txtExpression.Text);
48             this.txtExpression.SelectionStart = cursorPosition;
49         }
50
51         private void btnAdd_Click(object sender, EventArgs e)
52         {
53             this.CheckDuplication();
54         }
55
56         private bool CheckDuplication()
57         {
58             for (int i = 0; i < lstExpressions.Items.Count; i++)
59             {
60                 if (txtExpression.Text == lstExpressions.Items[i].ToString())
61                 {
62                     MessageBox.Show("Đã có biểu thức này trong danh sách rồi.");
63                     return false;
64                 }
65             }
66
67             AddExpression();
68             this.lstExpressions.SelectedIndex = -1;
69             this.lstExpressions.Refresh();
70             return true;
71         }
72
73         private void btnClear_Click(object sender, EventArgs e)
74         {
75             this.lstExpressions.Items.Clear();
76         }
77
78         private void btnRemove_Click(object sender, EventArgs e)
79         {
80             int index = this.lstExpressions.SelectedIndex;
81             this.lstExpressions.Items.Remove(this.lstExpressions.SelectedItem);
82             if (index == this.lstExpressions.Items.Count)
83                 index--;
84             if (index != -1)
85                 this.lstExpressions.SelectedIndex = index;
86         }
87
88         private void cmdPlotGraph_Click(object sender, EventArgs e)
89         {
90             if (mode.Text == "Cartesian")
91             {
92                 ExpressionHelper.Cartesian = true;
93                 ExpressionHelper.Polar = false;
94             }
95             else
96             {
97                 ExpressionHelper.Polar = true;
98                 ExpressionHelper.Cartesian = false;
99             }
100
101             ExpressionHelper.XStartValue = Convert.ToDouble(startX.Value);
102             ExpressionHelper.XEndValue = Convert.ToDouble(endX.Value);
103
104             if (form == null || form.IsDisposed)
105             {
106                 form = new Graph();
107                 form.Show();
108             }
109
110             form.SetRange((Double)startX.Value, (Double)endX.Value, (Double)startY.Value, (Double)endY.Value);
111             form.SetDivisions((int)this.divX.Value, (int)this.divY.Value);
112             form.SetPenWidth((int)this.penWidth.Value);
113
114             if (this.mode.SelectedItem.ToString() == "Polar")
115                 form.SetMode(GraphMode.Polar, (int)this.sensitivity.Value);
116             else
117                 form.SetMode(GraphMode.Rectangular, 50);
118
119             //form.RemoveAllExpressions();
120             ExpressionHelper.ArrExpression.Clear();
121             for (int i = 0; i < lstExpressions.Items.Count; i++)
122             {
123                 form.AddExpression((string)lstExpressions.Items[i], colorLevels[i % colorLevels.Length]);
124                 //Add expression to Array Expression (ThemBotBieuThuc form)
125                 ExpressionHelper.ArrExpression.Add(lstExpressions.Items[i]);
126             }
127
128             form.Refresh();
129             form.Activate();
130         }
131
132         private void mode_SelectedIndexChanged(object sender, EventArgs e)
133         {
134             if (this.mode.SelectedIndex == 1)
135                 this.sensitivity.Enabled = true;
136             else
137                 this.sensitivity.Enabled = false;
138         }
139
140         private void txtExpression_KeyPress(object sender, KeyPressEventArgs e)
141         {
142             if (e.KeyChar == 13 && txtExpression.Text.Length > 0)
143                 AddExpression();
144
145             //if a letter is found
146             if (char.IsLetter(e.KeyChar))
147             {
148                 int cursorPos = this.txtExpression.SelectionStart;
149                 if (cursorPos > 0)
150                 {
151                     //if the previous char is a digit, add a *
152                     if (char.IsDigit(this.txtExpression.Text[cursorPos - 1]))
153                     {
154                         this.txtExpression.Text = this.txtExpression.Text.Insert(cursorPos, "*" + e.KeyChar);
155                         cursorPos += 2;
156                         this.txtExpression.SelectionStart = cursorPos;
157                         e.Handled = true;
158                     }
159                     //if a function is formed, add a "("
160                     else
161                     {
162                         string text = string.Empty;
163                         int i = cursorPos - 1;
164                         while (i >= 0)
165                         {
166                             if (!char.IsLetter(this.txtExpression.Text[i]))
167                                 break;
168                             i--;
169                         }
170                         i++;
171                         //now i is the index where last text is started
172                         if (i < cursorPos)
173                             text = this.txtExpression.Text.Substring(i, cursorPos - i) + e.KeyChar;
174                         if (IsFunction(text))
175                         {
176                             this.txtExpression.Text = this.txtExpression.Text.Insert(cursorPos, e.KeyChar.ToString() + "(");
177                             cursorPos += 2;
178                             this.txtExpression.SelectionStart = cursorPos;
179                             e.Handled = true;
180                         }
181                     }
182                 }
183             }
184         }
185
186         private void lstExpressions_SelectedIndexChanged(object sender, EventArgs e)
187         {
188             if (this.lstExpressions.SelectedIndex != -1)
189                 this.txtExpression.Text = this.lstExpressions.Items[this.lstExpressions.SelectedIndex].ToString();
190         }
191
192         #endregion
193
194         #region Helper Functions
195         //this functions handles coloring of expressions
196         private void WriteText(string text)
197         {
198             int colorIndex = 0;
199             this.txtExpression.Text = "";
200             for (int i = 0; i < text.Length; i++)
201             {
202                 if (text[i] == '(')
203                 {
204                     colorIndex++;
205                     if (colorIndex == colorLevels.Length)
206                         colorIndex = 0;
207                     txtExpression.SelectionColor = colorLevels[colorIndex];
208                 }
209
210                 this.txtExpression.AppendText(text[i].ToString());
211
212                 if (text[i] == ')')
213                 {
214                     colorIndex--;
215                     if (colorIndex < 0)
216                         colorIndex = colorLevels.Length - 1;
217                     txtExpression.SelectionColor = colorLevels[colorIndex];
218                 }
219             }
220         }
221
222         private bool IsFunction(string text)
223         {
224             for (int i = 0; i < strFunctions.Length; i++)
225                 if (string.Compare(text, strFunctions[i], true) == 0)
226                     return true;
227             return false;
228         }
229
230         private void AddExpression()
231         {
232             if (this.txtExpression.Text.Length == 0)
233                 return;
234             this.txtExpression.Text = CompleteParenthesis(this.txtExpression.Text);
235             string expText = this.txtExpression.Text;
236             IEvaluatable exp = new Expression(expText);
237             if (!exp.IsValid)
238             {
239                 if (MessageBox.Show("Biểu thức bạn định thêm vào danh sách không hợp lệ! Bạn vẫn muốn thêm nó vào danh sách?", "", MessageBoxButtons.YesNo) == DialogResult.No)
240                     return;
241             }
242             this.lstExpressions.Items.Add(expText);
243             this.txtExpression.Text = string.Empty;
244         }
245         private string CompleteParenthesis(string exp)
246         {
247             int leftBracket = 0;
248             int rightBracket = 0;
249             for (int i = 0; i < exp.Length; i++)
250             {
251                 if (exp[i] == '(')
252                     leftBracket++;
253                 else if (exp[i] == ')')
254                     rightBracket++;
255             }
256             exp = exp.PadRight(exp.Length + leftBracket - rightBracket, ')');
257             return exp;
258         }
259
260         #endregion
261
262         #region Menu Area
263         private void tácGiảToolStripMenuItem_Click(object sender, EventArgs e)
264         {
265             TacGia frmTacGia = new TacGia();
266             frmTacGia.Show();
267         }
268
269
270
271         private void absToolStripMenuItem_Click(object sender, EventArgs e)
272         {
273             txtExpression.Text += "abs(";
274         }
275
276         private void sinToolStripMenuItem_Click(object sender, EventArgs e)
277         {
278             txtExpression.Text += "sin(";
279         }
280
281         private void cosToolStripMenuItem_Click(object sender, EventArgs e)
282         {
283             txtExpression.Text += "cos(";
284         }
285
286         private void tanToolStripMenuItem_Click(object sender, EventArgs e)
287         {
288             txtExpression.Text += "tan(";
289         }
290
291         private void secToolStripMenuItem_Click(object sender, EventArgs e)
292         {
293             txtExpression.Text += "sec(";
294         }
295
296         private void cosecToolStripMenuItem_Click(object sender, EventArgs e)
297         {
298             txtExpression.Text += "cosec(";
299         }
300
301         private void cotToolStripMenuItem_Click(object sender, EventArgs e)
302         {
303             txtExpression.Text += "cot(";
304         }
305
306         private void arcsinToolStripMenuItem_Click(object sender, EventArgs e)
307         {
308             txtExpression.Text += "arcsin(";
309         }
310
311         private void arccosToolStripMenuItem_Click(object sender, EventArgs e)
312         {
313             txtExpression.Text += "arccos(";
314         }
315
316         private void arctanToolStripMenuItem_Click(object sender, EventArgs e)
317         {
318             txtExpression.Text += "arctan(";
319         }
320
321         private void expToolStripMenuItem_Click(object sender, EventArgs e)
322         {
323             txtExpression.Text += "exp(";
324         }
325
326         private void lnToolStripMenuItem_Click(object sender, EventArgs e)
327         {
328             txtExpression.Text += "ln(";
329         }
330
331         private void logToolStripMenuItem_Click(object sender, EventArgs e)
332         {
333             txtExpression.Text += "log(";
334         }
335
336         private void antilogToolStripMenuItem_Click(object sender, EventArgs e)
337         {
338             txtExpression.Text += "antilog(";
339         }
340
341         private void sqrtToolStripMenuItem_Click(object sender, EventArgs e)
342         {
343             txtExpression.Text += "sqrt(";
344         }
345
346         private void sinhToolStripMenuItem_Click(object sender, EventArgs e)
347         {
348             txtExpression.Text += "sinh(";
349         }
350
351         private void coshToolStripMenuItem_Click(object sender, EventArgs e)
352         {
353             txtExpression.Text += "cosh(";
354         }
355
356         private void tanhToolStripMenuItem_Click(object sender, EventArgs e)
357         {
358             txtExpression.Text += "tanh(";
359         }
360
361         private void arcsinhToolStripMenuItem_Click(object sender, EventArgs e)
362         {
363             txtExpression.Text += "arcsinh(";
364         }
365
366         private void arccoshToolStripMenuItem_Click(object sender, EventArgs e)
367         {
368             txtExpression.Text += "arccosh(";
369         }
370
371         private void arctanhToolStripMenuItem_Click(object sender, EventArgs e)
372         {
373             txtExpression.Text += "arctanh(";
374         }
375
376         private void toolStripMenuItem2_Click(object sender, EventArgs e)
377         {
378             txtExpression.Text += "+";
379         }
380
381         private void toolStripMenuItem3_Click(object sender, EventArgs e)
382         {
383             txtExpression.Text += "-";
384         }
385
386         private void toolStripMenuItem4_Click(object sender, EventArgs e)
387         {
388             txtExpression.Text += "*";
389         }
390
391         private void toolStripMenuItem5_Click(object sender, EventArgs e)
392         {
393             txtExpression.Text += "/";
394         }
395
396         private void toolStripMenuItem6_Click(object sender, EventArgs e)
397         {
398             txtExpression.Text += "^";
399         }
400
401         private void toolStripMenuItem7_Click(object sender, EventArgs e)
402         {
403             txtExpression.Text += "(";
404         }
405
406         private void toolStripMenuItem8_Click(object sender, EventArgs e)
407         {
408             txtExpression.Text += ")";
409         }
410         #endregion
411     }
412 }



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