帶有行數(shù)和標(biāo)尺的RichTextBox
項(xiàng)目需要一個帶有行數(shù)和標(biāo)尺功能的RichTextBox,先是打算在RichTextBox里面自畫,但最終沒有實(shí)現(xiàn),最終用UserControl實(shí)現(xiàn)了該功能.
1.原理:
1)行數(shù):在RichTextBox旁邊放一個Label,設(shè)置Label字體大小,然后在RichTextBox的TextChaged方法中判斷是否換行,換行就重新為Label設(shè)值.
2)標(biāo)尺:在RichTextBox上面放一個Panel,在Panel上面畫尺.
代碼如下:
最終實(shí)現(xiàn)效果圖:
1.原理:
1)行數(shù):在RichTextBox旁邊放一個Label,設(shè)置Label字體大小,然后在RichTextBox的TextChaged方法中判斷是否換行,換行就重新為Label設(shè)值.
2)標(biāo)尺:在RichTextBox上面放一個Panel,在Panel上面畫尺.
代碼如下:
1
using System;
2using System.Collections.Generic;
3using System.ComponentModel;
4using System.Drawing;
5using System.Data;
6using System.Text;
7using System.Windows.Forms;
8
9namespace NumberedTextBox
10
{
11
public partial class NumberedTextBoxUC : UserControl
12
{
13
14 public NumberedTextBoxUC()
15 {
16 InitializeComponent();
17
18 numberLabel.Font = new Font(richTextBox1.Font.FontFamily, richTextBox1.Font.Size + 1.019f);
19
20
}
21
22 int _currentLine = 0;
23 public int CurrentLine
24 {
25 get
26 {
27 return _currentLine;
28 }
29 set
30 {
31 _currentLine = value;
32 }
33 }
34 private void updateNumberLabel()
35 {
36 //we get index of first visible char and number of first visible line
37 Point pos = new Point(0, 0);
38 int firstIndex = richTextBox1.GetCharIndexFromPosition(pos);
39 int firstLine = richTextBox1.GetLineFromCharIndex(firstIndex);
40
41 //now we get index of last visible char and number of last visible line
42 pos.X = ClientRectangle.Width;
43 pos.Y = ClientRectangle.Height;
44 int lastIndex = richTextBox1.GetCharIndexFromPosition(pos);
45 int lastLine = richTextBox1.GetLineFromCharIndex(lastIndex);
46 int myStart = this.richTextBox1.SelectionStart;
47 int myLine = this.richTextBox1.GetLineFromCharIndex(myStart) + 1;
48 pos = richTextBox1.GetPositionFromCharIndex(lastIndex);
49 if (lastIndex > _currentLine||lastIndex<_currentLine)
50 {
51 //finally, renumber label
52 numberLabel.Text = "";
53 for (int i = firstLine; i <= lastLine + 1; i++)
54 {
55 numberLabel.Text += i + 1 + "\n";
56 }
57 }
58 _currentLine = lastIndex;
59 //this is point position of last visible char, we'll use its Y value for calculating numberLabel size
60
61 }
62
63
64 private void richTextBox1_TextChanged(object sender, EventArgs e)
65 {
66 updateNumberLabel();
67 }
68
69 private void richTextBox1_VScroll(object sender, EventArgs e)
70 {
71 //move location of numberLabel for amount of pixels caused by scrollbar
72 int d = richTextBox1.GetPositionFromCharIndex(0).Y % (richTextBox1.Font.Height + 1);
73 numberLabel.Location = new Point(0, d);
74
75 updateNumberLabel();
76 }
77
78 private void richTextBox1_Resize(object sender, EventArgs e)
79 {
80 richTextBox1_VScroll(null, null);
81 }
82
83 private void richTextBox1_FontChanged(object sender, EventArgs e)
84 {
85 updateNumberLabel();
86 richTextBox1_VScroll(null, null);
87 }
88
89
90 }
91
}
92
using System;2
using System.Collections.Generic;3
using System.ComponentModel;4
using System.Drawing;5
using System.Data;6
using System.Text;7
using System.Windows.Forms;8
9
namespace NumberedTextBox10
{
11
public partial class NumberedTextBoxUC : UserControl12
{
13
14
public NumberedTextBoxUC()15
{16
InitializeComponent();17
18
numberLabel.Font = new Font(richTextBox1.Font.FontFamily, richTextBox1.Font.Size + 1.019f);19
20
}21
22
int _currentLine = 0;23
public int CurrentLine24
{25
get26
{27
return _currentLine;28
}29
set30
{31
_currentLine = value;32
}33
}34
private void updateNumberLabel()35
{36
//we get index of first visible char and number of first visible line37
Point pos = new Point(0, 0);38
int firstIndex = richTextBox1.GetCharIndexFromPosition(pos);39
int firstLine = richTextBox1.GetLineFromCharIndex(firstIndex);40
41
//now we get index of last visible char and number of last visible line42
pos.X = ClientRectangle.Width;43
pos.Y = ClientRectangle.Height;44
int lastIndex = richTextBox1.GetCharIndexFromPosition(pos);45
int lastLine = richTextBox1.GetLineFromCharIndex(lastIndex);46
int myStart = this.richTextBox1.SelectionStart;47
int myLine = this.richTextBox1.GetLineFromCharIndex(myStart) + 1;48
pos = richTextBox1.GetPositionFromCharIndex(lastIndex);49
if (lastIndex > _currentLine||lastIndex<_currentLine)50
{51
//finally, renumber label52
numberLabel.Text = "";53
for (int i = firstLine; i <= lastLine + 1; i++)54
{55
numberLabel.Text += i + 1 + "\n";56
}57
}58
_currentLine = lastIndex;59
//this is point position of last visible char, we'll use its Y value for calculating numberLabel size 60
61
}62
63
64
private void richTextBox1_TextChanged(object sender, EventArgs e)65
{66
updateNumberLabel(); 67
}68
69
private void richTextBox1_VScroll(object sender, EventArgs e)70
{71
//move location of numberLabel for amount of pixels caused by scrollbar72
int d = richTextBox1.GetPositionFromCharIndex(0).Y % (richTextBox1.Font.Height + 1);73
numberLabel.Location = new Point(0, d);74
75
updateNumberLabel();76
}77
78
private void richTextBox1_Resize(object sender, EventArgs e)79
{80
richTextBox1_VScroll(null, null);81
}82
83
private void richTextBox1_FontChanged(object sender, EventArgs e)84
{85
updateNumberLabel();86
richTextBox1_VScroll(null, null);87
} 88
89
90
}91
}92
1using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Drawing;
5using System.Windows.Forms;
6
7namespace Yqun.Client.ReportTools
8{
9 public class RulerPanel:Panel
10 {
11 protected override void OnPaint(PaintEventArgs e)
12 {
13 Graphics g = e.Graphics;
14 int top = 0;
15 int width = e.ClipRectangle.Width;
16 int temHeight = 5;
17 for (int i = 0; i < width-5; )
18 {
19
20 int height = temHeight;
21 int j = i / 5;
22 if (j % 10 == 0)
23 {
24 height = 15;
25 }
26 else if (j % 5 == 0)
27 {
28 height = 10;
29 }
30 Pen p = new Pen(new SolidBrush(Color.Black));
31 p.Width = 1;
32 g.DrawLine(p, i + 5, top, i + 5, top + height);
33 i += 5;
34 }
35 g.Flush();
36 base.OnPaint(e);
37 }
38 }
39}
40
using System;2
using System.Collections.Generic;3
using System.Text;4
using System.Drawing;5
using System.Windows.Forms;6
7
namespace Yqun.Client.ReportTools8
{9
public class RulerPanel:Panel10
{11
protected override void OnPaint(PaintEventArgs e)12
{13
Graphics g = e.Graphics;14
int top = 0;15
int width = e.ClipRectangle.Width;16
int temHeight = 5;17
for (int i = 0; i < width-5; )18
{19
20
int height = temHeight;21
int j = i / 5;22
if (j % 10 == 0)23
{24
height = 15;25
}26
else if (j % 5 == 0)27
{28
height = 10;29
} 30
Pen p = new Pen(new SolidBrush(Color.Black));31
p.Width = 1;32
g.DrawLine(p, i + 5, top, i + 5, top + height);33
i += 5; 34
}35
g.Flush();36
base.OnPaint(e);37
}38
}39
}40
最終實(shí)現(xiàn)效果圖:
作者：jillzhang
出處：http://jillzhang.cnblogs.com/
本文版權(quán)歸作者和博客園共有，歡迎轉(zhuǎn)載，但未經(jīng)作者同意必須保留此段聲明，且在文章頁面明顯位置給出原文連接，否則保留追究法律責(zé)任的權(quán)利。
出處：http://jillzhang.cnblogs.com/
本文版權(quán)歸作者和博客園共有，歡迎轉(zhuǎn)載，但未經(jīng)作者同意必須保留此段聲明，且在文章頁面明顯位置給出原文連接，否則保留追究法律責(zé)任的權(quán)利。
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