c#Winform自定义控件-温度计（工业）
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2023-12-24 18:08:51
前提 入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。 GitHub：https://github.com/kwwwvagaa/NetWinformControl 码云：https://gitee.com/kwwwvagaa/net_winform_custom_contr ......
本文转自http://hzhcontrols.com/blogs.html
前提
一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
github：https://github.com/kwwwvagaa/netwinformcontrol
nuget
install-package hzh_controls
目录
用处及效果
准备工作
依然用gid+画的，不懂请自行百度
开始
添加一个类ucthermometer，继承usercontrol
添加一个枚举，来决定显示的温度单位
1 public enum temperatureunit
2 {
3 /// <summary>
4 /// 不显示
5 /// </summary>
6 none,
7 /// <summary>
8 /// 摄氏度
9 /// </summary>
10 c,
11 /// <summary>
12 /// 华氏度
13 /// </summary>
14 f,
15 /// <summary>
16 /// 开氏度
17 /// </summary>
18 k,
19 /// <summary>
20 /// 兰氏度
21 /// </summary>
22 r,
23 /// <summary>
24 /// 列氏度
25 /// </summary>
26 re
27 }
添加一些属性
1 /// <summary>
2 /// the glass tube color
3 /// </summary>
4 private color glasstubecolor = color.fromargb(211, 211, 211);
5
6 /// <summary>
7 /// gets or sets the color of the glass tube.
8 /// </summary>
9 /// <value>the color of the glass tube.</value>
10 [description("玻璃管颜色"), category("自定义")]
11 public color glasstubecolor
12 {
13 get { return glasstubecolor; }
14 set
15 {
16 glasstubecolor = value;
17 refresh();
18 }
19 }
20
21 /// <summary>
22 /// the mercury color
23 /// </summary>
24 private color mercurycolor = color.fromargb(255, 77, 59);
25
26 /// <summary>
27 /// gets or sets the color of the mercury.
28 /// </summary>
29 /// <value>the color of the mercury.</value>
30 [description("水印颜色"), category("自定义")]
31 public color mercurycolor
32 {
33 get { return mercurycolor; }
34 set
35 {
36 mercurycolor = value;
37 refresh();
38 }
39 }
40
41 /// <summary>
42 /// the minimum value
43 /// </summary>
44 private decimal minvalue = 0;
45 /// <summary>
46 /// 左侧刻度最小值
47 /// </summary>
48 /// <value>the minimum value.</value>
49 [description("左侧刻度最小值"), category("自定义")]
50 public decimal minvalue
51 {
52 get { return minvalue; }
53 set
54 {
55 minvalue = value;
56 refresh();
57 }
58 }
59
60 /// <summary>
61 /// the maximum value
62 /// </summary>
63 private decimal maxvalue = 100;
64 /// <summary>
65 /// 左侧刻度最大值
66 /// </summary>
67 /// <value>the maximum value.</value>
68 [description("左侧刻度最大值"), category("自定义")]
69 public decimal maxvalue
70 {
71 get { return maxvalue; }
72 set
73 {
74 maxvalue = value;
75 refresh();
76 }
77 }
78
79 /// <summary>
80 /// the m value
81 /// </summary>
82 private decimal m_value = 10;
83 /// <summary>
84 /// 左侧刻度值
85 /// </summary>
86 /// <value>the value.</value>
87 [description("左侧刻度值"), category("自定义")]
88 public decimal value
89 {
90 get { return m_value; }
91 set
92 {
93 m_value = value;
94 refresh();
95 }
96 }
97
98 /// <summary>
99 /// the split count
100 /// </summary>
101 private int splitcount = 0;
102 /// <summary>
103 /// 刻度分隔份数
104 /// </summary>
105 /// <value>the split count.</value>
106 [description("刻度分隔份数"), category("自定义")]
107 public int splitcount
108 {
109 get { return splitcount; }
110 set
111 {
112 if (value <= 0)
113 return;
114 splitcount = value;
115 refresh();
116 }
117 }
118
119 /// <summary>
120 /// 获取或设置控件显示的文字的字体。
121 /// </summary>
122 /// <value>the font.</value>
123 /// <permissionset>
124 /// <ipermission class="system.security.permissions.environmentpermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
125 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
126 /// <ipermission class="system.security.permissions.securitypermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" flags="unmanagedcode, controlevidence" />
127 /// <ipermission class="system.diagnostics.performancecounterpermission, system, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
128 /// </permissionset>
129 [description("获取或设置控件显示的文字的字体"), category("自定义")]
130 public override font font
131 {
132 get
133 {
134 return base.font;
135 }
136 set
137 {
138 base.font = value;
139 refresh();
140 }
141 }
142
143 /// <summary>
144 /// 获取或设置控件的前景色。
145 /// </summary>
146 /// <value>the color of the fore.</value>
147 /// <permissionset>
148 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
149 /// </permissionset>
150 [description("获取或设置控件的文字及刻度颜色"), category("自定义")]
151 public override system.drawing.color forecolor
152 {
153 get
154 {
155 return base.forecolor;
156 }
157 set
158 {
159 base.forecolor = value;
160 refresh();
161 }
162 }
163
164 /// <summary>
165 /// the left temperature unit
166 /// </summary>
167 private temperatureunit lefttemperatureunit = temperatureunit.c;
168 /// <summary>
169 /// 左侧刻度单位，不可为none
170 /// </summary>
171 /// <value>the left temperature unit.</value>
172 [description("左侧刻度单位，不可为none"), category("自定义")]
173 public temperatureunit lefttemperatureunit
174 {
175 get { return lefttemperatureunit; }
176 set
177 {
178 if (value == temperatureunit.none)
179 return;
180 lefttemperatureunit = value;
181 refresh();
182 }
183 }
184
185 /// <summary>
186 /// the right temperature unit
187 /// </summary>
188 private temperatureunit righttemperatureunit = temperatureunit.c;
189 /// <summary>
190 /// 右侧刻度单位，当为none时，不显示
191 /// </summary>
192 /// <value>the right temperature unit.</value>
193 [description("右侧刻度单位，当为none时，不显示"), category("自定义")]
194 public temperatureunit righttemperatureunit
195 {
196 get { return righttemperatureunit; }
197 set
198 {
199 righttemperatureunit = value;
200 refresh();
201 }
202 }
203
204 /// <summary>
205 /// the m rect working
206 /// </summary>
207 rectangle m_rectworking;
208 /// <summary>
209 /// the m rect left
210 /// </summary>
211 rectangle m_rectleft;
212 /// <summary>
213 /// the m rect right
214 /// </summary>
215 rectangle m_rectright;
改变大小时，设定画图区域
1 void ucthermometer_sizechanged(object sender, eventargs e)
2 {
3 m_rectworking = new rectangle(this.width / 2 - this.width / 8, this.width / 4, this.width / 4, this.height - this.width / 2);
4 m_rectleft = new rectangle(0, m_rectworking.top + m_rectworking.width / 2, (this.width - this.width / 4) / 2 - 2, m_rectworking.height - m_rectworking.width * 2);
5 m_rectright = new rectangle(this.width - (this.width - this.width / 4) / 2 + 2, m_rectworking.top + m_rectworking.width / 2, (this.width - this.width / 4) / 2 - 2, m_rectworking.height - m_rectworking.width * 2);
6 }
重绘
1 protected override void onpaint(painteventargs e)
2 {
3 base.onpaint(e);
4 var g = e.graphics;
5 g.setgdihigh();
6
7 //玻璃管管
8 graphicspath path = new graphicspath();
9 path.addline(m_rectworking.left, m_rectworking.bottom, m_rectworking.left, m_rectworking.top + m_rectworking.width / 2);
10 path.addarc(new rectangle(m_rectworking.left, m_rectworking.top, m_rectworking.width, m_rectworking.width), 180, 180);
11 path.addline(m_rectworking.right, m_rectworking.top + m_rectworking.width / 2, m_rectworking.right, m_rectworking.bottom);
12 path.closeallfigures();
13 g.fillpath(new solidbrush(glasstubecolor), path);
14
15 //底部
16 var rectdi = new rectangle(this.width / 2 - m_rectworking.width, m_rectworking.bottom - m_rectworking.width - 2, m_rectworking.width * 2, m_rectworking.width * 2);
17 g.fillellipse(new solidbrush(glasstubecolor), rectdi);
18 g.fillellipse(new solidbrush(mercurycolor), new rectangle(rectdi.left + 4, rectdi.top + 4, rectdi.width - 8, rectdi.height - 8));
19
20 //刻度
21 decimal decsplit = (maxvalue - minvalue) / splitcount;
22 decimal decsplitheight = m_rectleft.height / splitcount;
23 for (int i = 0; i <= splitcount; i++)
24 {
25 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.left + 2, (float)(m_rectleft.bottom - decsplitheight * i)), new pointf(m_rectleft.right, (float)(m_rectleft.bottom - decsplitheight * i)));
26
27 var valueleft = (minvalue + decsplit * i).tostring("0.##");
28 var sizeleft = g.measurestring(valueleft, font);
29 g.drawstring(valueleft, font, new solidbrush(forecolor), new pointf(m_rectleft.left, m_rectleft.bottom - (float)decsplitheight * i - sizeleft.height - 1));
30
31 if (righttemperatureunit != temperatureunit.none)
32 {
33 g.drawline(new pen(new solidbrush(color.black), 1), new pointf(m_rectright.left + 2, (float)(m_rectright.bottom - decsplitheight * i)), new pointf(m_rectright.right, (float)(m_rectright.bottom - decsplitheight * i)));
34 var valueright = getrightvalue(minvalue + decsplit * i).tostring("0.##");
35 var sizeright = g.measurestring(valueright, font);
36 g.drawstring(valueright, font, new solidbrush(forecolor), new pointf(m_rectright.right - sizeright.width - 1, m_rectright.bottom - (float)decsplitheight * i - sizeright.height - 1));
37 }
38 if (i != splitcount)
39 {
40 if (decsplitheight > 40)
41 {
42 var decsp1 = decsplitheight / 10;
43 for (int j = 1; j < 10; j++)
44 {
45 if (j == 5)
46 {
47 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 10, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
48 if (righttemperatureunit != temperatureunit.none)
49 {
50 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 10, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
51 }
52 }
53 else
54 {
55 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 5, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
56 if (righttemperatureunit != temperatureunit.none)
57 {
58 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 5, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
59 }
60 }
61 }
62 }
63 else if (decsplitheight > 10)
64 {
65 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 5, (m_rectleft.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)));
66 if (righttemperatureunit != temperatureunit.none)
67 {
68 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 5, (m_rectright.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)));
69 }
70 }
71 }
72 }
73 //单位
74 string strleftunit = getunitchar(lefttemperatureunit);
75 g.drawstring(strleftunit, font, new solidbrush(forecolor), new pointf(m_rectleft.left + 2, 2));
76 if (righttemperatureunit != temperatureunit.none)
77 {
78 string strrightunit = getunitchar(righttemperatureunit);
79 var rightsize = g.measurestring(strrightunit, font);
80 g.drawstring(strrightunit, font, new solidbrush(forecolor), new pointf(m_rectright.right - 2 - rightsize.width, 2));
81 }
82 //值
83 float fltheightvalue = (float)(value / (maxvalue - minvalue) * m_rectleft.height);
84 rectanglef rectvalue = new rectanglef(m_rectworking.left + 4, m_rectleft.top + (m_rectleft.height - fltheightvalue), m_rectworking.width - 8, fltheightvalue + (m_rectworking.height - m_rectworking.width / 2 - m_rectleft.height));
85 g.fillrectangle(new solidbrush(mercurycolor), rectvalue);
86
87
88 var sizevalue = g.measurestring(m_value.tostring("0.##"), font);
89 g.drawstring(m_value.tostring("0.##"), font, new solidbrush(color.white), new pointf(rectdi.left + (rectdi.width - sizevalue.width) / 2, rectdi.top + (rectdi.height - sizevalue.height) / 2 + 1));
90 }
辅助函数
1 private string getunitchar(temperatureunit unit)
2 {
3 string strunit = "℃";
4 switch (unit)
5 {
6 case temperatureunit.c:
7 strunit = "℃";
8 break;
9 case temperatureunit.f:
10 strunit = "℉";
11 break;
12 case temperatureunit.k:
13 strunit = "k";
14 break;
15 case temperatureunit.r:
16 strunit = "°r";
17 break;
18 case temperatureunit.re:
19 strunit = "°re";
20 break;
21 }
22 return strunit;
23 }
24
25 private decimal getrightvalue(decimal decvalue)
26 {
27 //先将左侧的换算为摄氏度
28 var dec = decvalue;
29 switch (lefttemperatureunit)
30 {
31 case temperatureunit.f:
32 dec = (decvalue - 32) / (9m / 5m);
33 break;
34 case temperatureunit.k:
35 dec = decvalue - 273;
36 break;
37 case temperatureunit.r:
38 dec = decvalue / (5m / 9m) - 273.15m;
39 break;
40 case temperatureunit.re:
41 dec = decvalue / 1.25m;
42 break;
43 default:
44 break;
45 }
46
47 switch (righttemperatureunit)
48 {
49 case temperatureunit.c:
50 return dec;
51 case temperatureunit.f:
52 return 9m / 5m * dec + 32;
53 case temperatureunit.k:
54 return dec + 273;
55 case temperatureunit.r:
56 return (dec + 273.15m) * (5m / 9m);
57 case temperatureunit.re:
58 return dec * 1.25m;
59 }
60 return decvalue;
61 }
完整代码
1 // ***********************************************************************
2 // assembly : hzh_controls
3 // created : 2019-09-10
4 //
5 // ***********************************************************************
6 // <copyright file="ucthermometer.cs">
7 // copyright by huang zhenghui(黄正辉) all, qq group:568015492 qq:623128629 email:623128629@qq.com
8 // </copyright>
9 //
10 // blog: https://www.cnblogs.com/bfyx
11 // github：https://github.com/kwwwvagaa/netwinformcontrol
12 // gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
13 //
14 // if you use this code, please keep this note.
15 // ***********************************************************************
16 using system;
17 using system.collections.generic;
18 using system.linq;
19 using system.text;
20 using system.windows.forms;
21 using system.drawing;
22 using system.drawing.drawing2d;
23 using system.componentmodel;
24
25 namespace hzh_controls.controls
26 {
27 /// <summary>
28 /// class ucthermometer.
29 /// implements the <see cref="system.windows.forms.usercontrol" />
30 /// </summary>
31 /// <seealso cref="system.windows.forms.usercontrol" />
32 public class ucthermometer : usercontrol
33 {
34 /// <summary>
35 /// the glass tube color
36 /// </summary>
37 private color glasstubecolor = color.fromargb(211, 211, 211);
38
39 /// <summary>
40 /// gets or sets the color of the glass tube.
41 /// </summary>
42 /// <value>the color of the glass tube.</value>
43 [description("玻璃管颜色"), category("自定义")]
44 public color glasstubecolor
45 {
46 get { return glasstubecolor; }
47 set
48 {
49 glasstubecolor = value;
50 refresh();
51 }
52 }
53
54 /// <summary>
55 /// the mercury color
56 /// </summary>
57 private color mercurycolor = color.fromargb(255, 77, 59);
58
59 /// <summary>
60 /// gets or sets the color of the mercury.
61 /// </summary>
62 /// <value>the color of the mercury.</value>
63 [description("水印颜色"), category("自定义")]
64 public color mercurycolor
65 {
66 get { return mercurycolor; }
67 set
68 {
69 mercurycolor = value;
70 refresh();
71 }
72 }
73
74 /// <summary>
75 /// the minimum value
76 /// </summary>
77 private decimal minvalue = 0;
78 /// <summary>
79 /// 左侧刻度最小值
80 /// </summary>
81 /// <value>the minimum value.</value>
82 [description("左侧刻度最小值"), category("自定义")]
83 public decimal minvalue
84 {
85 get { return minvalue; }
86 set
87 {
88 minvalue = value;
89 refresh();
90 }
91 }
92
93 /// <summary>
94 /// the maximum value
95 /// </summary>
96 private decimal maxvalue = 100;
97 /// <summary>
98 /// 左侧刻度最大值
99 /// </summary>
100 /// <value>the maximum value.</value>
101 [description("左侧刻度最大值"), category("自定义")]
102 public decimal maxvalue
103 {
104 get { return maxvalue; }
105 set
106 {
107 maxvalue = value;
108 refresh();
109 }
110 }
111
112 /// <summary>
113 /// the m value
114 /// </summary>
115 private decimal m_value = 10;
116 /// <summary>
117 /// 左侧刻度值
118 /// </summary>
119 /// <value>the value.</value>
120 [description("左侧刻度值"), category("自定义")]
121 public decimal value
122 {
123 get { return m_value; }
124 set
125 {
126 m_value = value;
127 refresh();
128 }
129 }
130
131 /// <summary>
132 /// the split count
133 /// </summary>
134 private int splitcount = 0;
135 /// <summary>
136 /// 刻度分隔份数
137 /// </summary>
138 /// <value>the split count.</value>
139 [description("刻度分隔份数"), category("自定义")]
140 public int splitcount
141 {
142 get { return splitcount; }
143 set
144 {
145 if (value <= 0)
146 return;
147 splitcount = value;
148 refresh();
149 }
150 }
151
152 /// <summary>
153 /// 获取或设置控件显示的文字的字体。
154 /// </summary>
155 /// <value>the font.</value>
156 /// <permissionset>
157 /// <ipermission class="system.security.permissions.environmentpermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
158 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
159 /// <ipermission class="system.security.permissions.securitypermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" flags="unmanagedcode, controlevidence" />
160 /// <ipermission class="system.diagnostics.performancecounterpermission, system, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
161 /// </permissionset>
162 [description("获取或设置控件显示的文字的字体"), category("自定义")]
163 public override font font
164 {
165 get
166 {
167 return base.font;
168 }
169 set
170 {
171 base.font = value;
172 refresh();
173 }
174 }
175
176 /// <summary>
177 /// 获取或设置控件的前景色。
178 /// </summary>
179 /// <value>the color of the fore.</value>
180 /// <permissionset>
181 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
182 /// </permissionset>
183 [description("获取或设置控件的文字及刻度颜色"), category("自定义")]
184 public override system.drawing.color forecolor
185 {
186 get
187 {
188 return base.forecolor;
189 }
190 set
191 {
192 base.forecolor = value;
193 refresh();
194 }
195 }
196
197 /// <summary>
198 /// the left temperature unit
199 /// </summary>
200 private temperatureunit lefttemperatureunit = temperatureunit.c;
201 /// <summary>
202 /// 左侧刻度单位，不可为none
203 /// </summary>
204 /// <value>the left temperature unit.</value>
205 [description("左侧刻度单位，不可为none"), category("自定义")]
206 public temperatureunit lefttemperatureunit
207 {
208 get { return lefttemperatureunit; }
209 set
210 {
211 if (value == temperatureunit.none)
212 return;
213 lefttemperatureunit = value;
214 refresh();
215 }
216 }
217
218 /// <summary>
219 /// the right temperature unit
220 /// </summary>
221 private temperatureunit righttemperatureunit = temperatureunit.c;
222 /// <summary>
223 /// 右侧刻度单位，当为none时，不显示
224 /// </summary>
225 /// <value>the right temperature unit.</value>
226 [description("右侧刻度单位，当为none时，不显示"), category("自定义")]
227 public temperatureunit righttemperatureunit
228 {
229 get { return righttemperatureunit; }
230 set
231 {
232 righttemperatureunit = value;
233 refresh();
234 }
235 }
236
237 /// <summary>
238 /// the m rect working
239 /// </summary>
240 rectangle m_rectworking;
241 /// <summary>
242 /// the m rect left
243 /// </summary>
244 rectangle m_rectleft;
245 /// <summary>
246 /// the m rect right
247 /// </summary>
248 rectangle m_rectright;
249 /// <summary>
250 /// initializes a new instance of the <see cref="ucthermometer"/> class.
251 /// </summary>
252 public ucthermometer()
253 {
254 this.setstyle(controlstyles.allpaintinginwmpaint, true);
255 this.setstyle(controlstyles.doublebuffer, true);
256 this.setstyle(controlstyles.resizeredraw, true);
257 this.setstyle(controlstyles.selectable, true);
258 this.setstyle(controlstyles.supportstransparentbackcolor, true);
259 this.setstyle(controlstyles.userpaint, true);
260 this.autoscalemode = system.windows.forms.autoscalemode.none;
261 this.sizechanged += ucthermometer_sizechanged;
262 this.size = new size(70, 200);
263 }
264
265 /// <summary>
266 /// handles the sizechanged event of the ucthermometer control.
267 /// </summary>
268 /// <param name="sender">the source of the event.</param>
269 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
270 void ucthermometer_sizechanged(object sender, eventargs e)
271 {
272 m_rectworking = new rectangle(this.width / 2 - this.width / 8, this.width / 4, this.width / 4, this.height - this.width / 2);
273 m_rectleft = new rectangle(0, m_rectworking.top + m_rectworking.width / 2, (this.width - this.width / 4) / 2 - 2, m_rectworking.height - m_rectworking.width * 2);
274 m_rectright = new rectangle(this.width - (this.width - this.width / 4) / 2 + 2, m_rectworking.top + m_rectworking.width / 2, (this.width - this.width / 4) / 2 - 2, m_rectworking.height - m_rectworking.width * 2);
275 }
276
277 /// <summary>
278 /// 引发 <see cref="e:system.windows.forms.control.paint" /> 事件。
279 /// </summary>
280 /// <param name="e">包含事件数据的 <see cref="t:system.windows.forms.painteventargs" />。</param>
281 protected override void onpaint(painteventargs e)
282 {
283 base.onpaint(e);
284 var g = e.graphics;
285 g.setgdihigh();
286
287 //玻璃管管
288 graphicspath path = new graphicspath();
289 path.addline(m_rectworking.left, m_rectworking.bottom, m_rectworking.left, m_rectworking.top + m_rectworking.width / 2);
290 path.addarc(new rectangle(m_rectworking.left, m_rectworking.top, m_rectworking.width, m_rectworking.width), 180, 180);
291 path.addline(m_rectworking.right, m_rectworking.top + m_rectworking.width / 2, m_rectworking.right, m_rectworking.bottom);
292 path.closeallfigures();
293 g.fillpath(new solidbrush(glasstubecolor), path);
294
295 //底部
296 var rectdi = new rectangle(this.width / 2 - m_rectworking.width, m_rectworking.bottom - m_rectworking.width - 2, m_rectworking.width * 2, m_rectworking.width * 2);
297 g.fillellipse(new solidbrush(glasstubecolor), rectdi);
298 g.fillellipse(new solidbrush(mercurycolor), new rectangle(rectdi.left + 4, rectdi.top + 4, rectdi.width - 8, rectdi.height - 8));
299
300 //刻度
301 decimal decsplit = (maxvalue - minvalue) / splitcount;
302 decimal decsplitheight = m_rectleft.height / splitcount;
303 for (int i = 0; i <= splitcount; i++)
304 {
305 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.left + 2, (float)(m_rectleft.bottom - decsplitheight * i)), new pointf(m_rectleft.right, (float)(m_rectleft.bottom - decsplitheight * i)));
306
307 var valueleft = (minvalue + decsplit * i).tostring("0.##");
308 var sizeleft = g.measurestring(valueleft, font);
309 g.drawstring(valueleft, font, new solidbrush(forecolor), new pointf(m_rectleft.left, m_rectleft.bottom - (float)decsplitheight * i - sizeleft.height - 1));
310
311 if (righttemperatureunit != temperatureunit.none)
312 {
313 g.drawline(new pen(new solidbrush(color.black), 1), new pointf(m_rectright.left + 2, (float)(m_rectright.bottom - decsplitheight * i)), new pointf(m_rectright.right, (float)(m_rectright.bottom - decsplitheight * i)));
314 var valueright = getrightvalue(minvalue + decsplit * i).tostring("0.##");
315 var sizeright = g.measurestring(valueright, font);
316 g.drawstring(valueright, font, new solidbrush(forecolor), new pointf(m_rectright.right - sizeright.width - 1, m_rectright.bottom - (float)decsplitheight * i - sizeright.height - 1));
317 }
318 if (i != splitcount)
319 {
320 if (decsplitheight > 40)
321 {
322 var decsp1 = decsplitheight / 10;
323 for (int j = 1; j < 10; j++)
324 {
325 if (j == 5)
326 {
327 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 10, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
328 if (righttemperatureunit != temperatureunit.none)
329 {
330 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 10, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
331 }
332 }
333 else
334 {
335 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 5, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
336 if (righttemperatureunit != temperatureunit.none)
337 {
338 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 5, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - ((float)decsp1 * j))));
339 }
340 }
341 }
342 }
343 else if (decsplitheight > 10)
344 {
345 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectleft.right - 5, (m_rectleft.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)), new pointf(m_rectleft.right, (m_rectleft.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)));
346 if (righttemperatureunit != temperatureunit.none)
347 {
348 g.drawline(new pen(new solidbrush(forecolor), 1), new pointf(m_rectright.left + 5, (m_rectright.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)), new pointf(m_rectright.left, (m_rectright.bottom - (float)decsplitheight * i - (float)decsplitheight / 2)));
349 }
350 }
351 }
352 }
353 //单位
354 string strleftunit = getunitchar(lefttemperatureunit);
355 g.drawstring(strleftunit, font, new solidbrush(forecolor), new pointf(m_rectleft.left + 2, 2));
356 if (righttemperatureunit != temperatureunit.none)
357 {
358 string strrightunit = getunitchar(righttemperatureunit);
359 var rightsize = g.measurestring(strrightunit, font);
360 g.drawstring(strrightunit, font, new solidbrush(forecolor), new pointf(m_rectright.right - 2 - rightsize.width, 2));
361 }
362 //值
363 float fltheightvalue = (float)(value / (maxvalue - minvalue) * m_rectleft.height);
364 rectanglef rectvalue = new rectanglef(m_rectworking.left + 4, m_rectleft.top + (m_rectleft.height - fltheightvalue), m_rectworking.width - 8, fltheightvalue + (m_rectworking.height - m_rectworking.width / 2 - m_rectleft.height));
365 g.fillrectangle(new solidbrush(mercurycolor), rectvalue);
366
367
368 var sizevalue = g.measurestring(m_value.tostring("0.##"), font);
369 g.drawstring(m_value.tostring("0.##"), font, new solidbrush(color.white), new pointf(rectdi.left + (rectdi.width - sizevalue.width) / 2, rectdi.top + (rectdi.height - sizevalue.height) / 2 + 1));
370 }
371
372 private string getunitchar(temperatureunit unit)
373 {
374 string strunit = "℃";
375 switch (unit)
376 {
377 case temperatureunit.c:
378 strunit = "℃";
379 break;
380 case temperatureunit.f:
381 strunit = "℉";
382 break;
383 case temperatureunit.k:
384 strunit = "k";
385 break;
386 case temperatureunit.r:
387 strunit = "°r";
388 break;
389 case temperatureunit.re:
390 strunit = "°re";
391 break;
392 }
393 return strunit;
394 }
395
396 private decimal getrightvalue(decimal decvalue)
397 {
398 //先将左侧的换算为摄氏度
399 var dec = decvalue;
400 switch (lefttemperatureunit)
401 {
402 case temperatureunit.f:
403 dec = (decvalue - 32) / (9m / 5m);
404 break;
405 case temperatureunit.k:
406 dec = decvalue - 273;
407 break;
408 case temperatureunit.r:
409 dec = decvalue / (5m / 9m) - 273.15m;
410 break;
411 case temperatureunit.re:
412 dec = decvalue / 1.25m;
413 break;
414 default:
415 break;
416 }
417
418 switch (righttemperatureunit)
419 {
420 case temperatureunit.c:
421 return dec;
422 case temperatureunit.f:
423 return 9m / 5m * dec + 32;
424 case temperatureunit.k:
425 return dec + 273;
426 case temperatureunit.r:
427 return (dec + 273.15m) * (5m / 9m);
428 case temperatureunit.re:
429 return dec * 1.25m;
430 }
431 return decvalue;
432 }
433 }
434
435 /// <summary>
436 /// enum temperatureunit
437 /// </summary>
438 public enum temperatureunit
439 {
440 /// <summary>
441 /// 不显示
442 /// </summary>
443 none,
444 /// <summary>
445 /// 摄氏度
446 /// </summary>
447 c,
448 /// <summary>
449 /// 华氏度
450 /// </summary>
451 f,
452 /// <summary>
453 /// 开氏度
454 /// </summary>
455 k,
456 /// <summary>
457 /// 兰氏度
458 /// </summary>
459 r,
460 /// <summary>
461 /// 列氏度
462 /// </summary>
463 re
464 }
465 }
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