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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。
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我们理一下思路，进度条支持圆环或扇形显示，支持百分比和数值显示
添加一个用户控件，命名ucprocessellipse
定义2个枚举
我要评论 1 public enum valuetype
2 {
3 /// <summary>
4 /// 百分比
5 /// </summary>
6 percent,
7 /// <summary>
8 /// 数值
9 /// </summary>
10 absolute
11 }
12
13 public enum showtype
14 {
15 /// <summary>
16 /// 圆环
17 /// </summary>
18 ring,
19 /// <summary>
20 /// 扇形
21 /// </summary>
22 sector
23 }
添加属性
1 [description("值改变事件"), category("自定义")]
2 public event eventhandler valuechanged;
3
4 private color m_backellipsecolor = color.fromargb(22, 160, 133);
5 /// <summary>
6 /// 圆背景色
7 /// </summary>
8 [description("圆背景色"), category("自定义")]
9 public color backellipsecolor
10 {
11 get { return m_backellipsecolor; }
12 set
13 {
14 m_backellipsecolor = value;
15 refresh();
16 }
17 }
18
19 private color m_coreellipsecolor = color.fromargb(180, 180, 180);
20 /// <summary>
21 /// 内圆颜色，showtype=ring 有效
22 /// </summary>
23 [description("内圆颜色，showtype=ring 有效"), category("自定义")]
24 public color coreellipsecolor
25 {
26 get { return m_coreellipsecolor; }
27 set
28 {
29 m_coreellipsecolor = value;
30 refresh();
31 }
32 }
33
34 private color m_valuecolor = color.fromargb(255, 77, 59);
35
36 [description("值圆颜色"), category("自定义")]
37 public color valuecolor
38 {
39 get { return m_valuecolor; }
40 set
41 {
42 m_valuecolor = value;
43 refresh();
44 }
45 }
46
47 private bool m_isshowcoreellipseborder = true;
48 /// <summary>
49 /// 内圆是否显示边框，showtype=ring 有效
50 /// </summary>
51 [description("内圆是否显示边框，showtype=ring 有效"), category("自定义")]
52 public bool isshowcoreellipseborder
53 {
54 get { return m_isshowcoreellipseborder; }
55 set
56 {
57 m_isshowcoreellipseborder = value;
58 refresh();
59 }
60 }
61
62 private valuetype m_valuetype = valuetype.percent;
63 /// <summary>
64 /// 值文字类型
65 /// </summary>
66 [description("值文字类型"), category("自定义")]
67 public valuetype valuetype
68 {
69 get { return m_valuetype; }
70 set
71 {
72 m_valuetype = value;
73 refresh();
74 }
75 }
76
77 private int m_valuewidth = 30;
78 /// <summary>
79 /// 外圆值宽度
80 /// </summary>
81 [description("外圆值宽度，showtype=ring 有效"), category("自定义")]
82 public int valuewidth
83 {
84 get { return m_valuewidth; }
85 set
86 {
87 if (value <= 0 || value > math.min(this.width, this.height))
88 return;
89 m_valuewidth = value;
90 refresh();
91 }
92 }
93
94 private int m_valuemargin = 5;
95 /// <summary>
96 /// 外圆值间距
97 /// </summary>
98 [description("外圆值间距"), category("自定义")]
99 public int valuemargin
100 {
101 get { return m_valuemargin; }
102 set
103 {
104 if (value < 0 || m_valuemargin >= m_valuewidth)
105 return;
106 m_valuemargin = value;
107 refresh();
108 }
109 }
110
111 private int m_maxvalue = 100;
112 /// <summary>
113 /// 最大值
114 /// </summary>
115 [description("最大值"), category("自定义")]
116 public int maxvalue
117 {
118 get { return m_maxvalue; }
119 set
120 {
121 if (value > m_value || value <= 0)
122 return;
123 m_maxvalue = value;
124 refresh();
125 }
126 }
127
128 private int m_value = 0;
129 /// <summary>
130 /// 当前值
131 /// </summary>
132 [description("当前值"), category("自定义")]
133 public int value
134 {
135 get { return m_value; }
136 set
137 {
138 if (m_maxvalue < value || value <= 0)
139 return;
140 m_value = value;
141 if (valuechanged != null)
142 {
143 valuechanged(this, null);
144 }
145 refresh();
146 }
147 }
148 private font m_font = new font("arial unicode ms", 20);
149 [description("文字字体"), category("自定义")]
150 public override font font
151 {
152 get
153 {
154 return m_font;
155 }
156 set
157 {
158 m_font = value;
159 refresh();
160 }
161 }
162 color m_forecolor = color.white;
163 [description("文字颜色"), category("自定义")]
164 public override color forecolor
165 {
166 get
167 {
168 return m_forecolor;
169 }
170 set
171 {
172 m_forecolor = value;
173 refresh();
174 }
175 }
176
177 private showtype m_showtype = showtype.ring;
178
179 [description("显示类型"), category("自定义")]
180 public showtype showtype
181 {
182 get { return m_showtype; }
183 set
184 {
185 m_showtype = value;
186 refresh();
187 }
188 }
重绘
1 protected override void onpaint(painteventargs e)
2 {
3 base.onpaint(e);
4
5 var g = e.graphics;
6 g.smoothingmode = smoothingmode.antialias; //使绘图质量最高，即消除锯齿
7 g.interpolationmode = interpolationmode.highqualitybicubic;
8 g.compositingquality = compositingquality.highquality;
9
10 int intwidth = math.min(this.size.width, this.size.height);
11 //底圆
12 g.fillellipse(new solidbrush(m_backellipsecolor), new rectangle(new point(0, 0), new size(intwidth, intwidth)));
13 if (m_showtype == hzh_controls.controls.showtype.ring)
14 {
15 //中心圆
16 int intcore = intwidth - m_valuewidth * 2;
17 g.fillellipse(new solidbrush(m_coreellipsecolor), new rectangle(new point(m_valuewidth, m_valuewidth), new size(intcore, intcore)));
18 //中心圆边框
19 if (m_isshowcoreellipseborder)
20 {
21 g.drawellipse(new pen(m_valuecolor, 2), new rectangle(new point(m_valuewidth + 1, m_valuewidth + 1), new size(intcore - 1, intcore - 1)));
22 }
23 if (m_value > 0 && m_maxvalue > 0)
24 {
25 float fltpercent = (float)m_value / (float)m_maxvalue;
26 if (fltpercent > 1)
27 {
28 fltpercent = 1;
29 }
30
31 g.drawarc(new pen(m_valuecolor, m_valuewidth - m_valuemargin * 2), new rectanglef(new point(m_valuewidth / 2 + m_valuemargin / 4, m_valuewidth / 2 + m_valuemargin / 4), new sizef(intwidth - m_valuewidth - m_valuemargin / 2 + (m_valuemargin == 0 ? 0 : 1), intwidth - m_valuewidth - m_valuemargin / 2 + (m_valuemargin == 0 ? 0 : 1))), -90, fltpercent * 360);
32
33 string strvaluetext = m_valuetype == hzh_controls.controls.valuetype.percent ? fltpercent.tostring("0%") : m_value.tostring();
34 system.drawing.sizef _txtsize = g.measurestring(strvaluetext, this.font);
35 g.drawstring(strvaluetext, this.font, new solidbrush(this.forecolor), new pointf((intwidth - _txtsize.width) / 2 + 1, (intwidth - _txtsize.height) / 2 + 1));
36 }
37 }
38 else
39 {
40 if (m_value > 0 && m_maxvalue > 0)
41 {
42 float fltpercent = (float)m_value / (float)m_maxvalue;
43 if (fltpercent > 1)
44 {
45 fltpercent = 1;
46 }
47
48 g.fillpie(new solidbrush(m_valuecolor), new rectangle(m_valuemargin, m_valuemargin, intwidth - m_valuemargin * 2, intwidth - m_valuemargin * 2), -90, fltpercent * 360);
49
50 string strvaluetext = m_valuetype == hzh_controls.controls.valuetype.percent ? fltpercent.tostring("0%") : m_value.tostring();
51 system.drawing.sizef _txtsize = g.measurestring(strvaluetext, this.font);
52 g.drawstring(strvaluetext, this.font, new solidbrush(this.forecolor), new pointf((intwidth - _txtsize.width) / 2 + 1, (intwidth - _txtsize.height) / 2 + 1));
53 }
54 }
55
56 }
完整代码如下
1 using system;
2 using system.collections.generic;
3 using system.componentmodel;
4 using system.drawing;
5 using system.data;
6 using system.linq;
7 using system.text;
8 using system.windows.forms;
9 using system.drawing.drawing2d;
10
11 namespace hzh_controls.controls
12 {
13 public partial class ucprocessellipse : usercontrol
14 {
15 [description("值改变事件"), category("自定义")]
16 public event eventhandler valuechanged;
17
18 private color m_backellipsecolor = color.fromargb(22, 160, 133);
19 /// <summary>
20 /// 圆背景色
21 /// </summary>
22 [description("圆背景色"), category("自定义")]
23 public color backellipsecolor
24 {
25 get { return m_backellipsecolor; }
26 set
27 {
28 m_backellipsecolor = value;
29 refresh();
30 }
31 }
32
33 private color m_coreellipsecolor = color.fromargb(180, 180, 180);
34 /// <summary>
35 /// 内圆颜色，showtype=ring 有效
36 /// </summary>
37 [description("内圆颜色，showtype=ring 有效"), category("自定义")]
38 public color coreellipsecolor
39 {
40 get { return m_coreellipsecolor; }
41 set
42 {
43 m_coreellipsecolor = value;
44 refresh();
45 }
46 }
47
48 private color m_valuecolor = color.fromargb(255, 77, 59);
49
50 [description("值圆颜色"), category("自定义")]
51 public color valuecolor
52 {
53 get { return m_valuecolor; }
54 set
55 {
56 m_valuecolor = value;
57 refresh();
58 }
59 }
60
61 private bool m_isshowcoreellipseborder = true;
62 /// <summary>
63 /// 内圆是否显示边框，showtype=ring 有效
64 /// </summary>
65 [description("内圆是否显示边框，showtype=ring 有效"), category("自定义")]
66 public bool isshowcoreellipseborder
67 {
68 get { return m_isshowcoreellipseborder; }
69 set
70 {
71 m_isshowcoreellipseborder = value;
72 refresh();
73 }
74 }
75
76 private valuetype m_valuetype = valuetype.percent;
77 /// <summary>
78 /// 值文字类型
79 /// </summary>
80 [description("值文字类型"), category("自定义")]
81 public valuetype valuetype
82 {
83 get { return m_valuetype; }
84 set
85 {
86 m_valuetype = value;
87 refresh();
88 }
89 }
90
91 private int m_valuewidth = 30;
92 /// <summary>
93 /// 外圆值宽度
94 /// </summary>
95 [description("外圆值宽度，showtype=ring 有效"), category("自定义")]
96 public int valuewidth
97 {
98 get { return m_valuewidth; }
99 set
100 {
101 if (value <= 0 || value > math.min(this.width, this.height))
102 return;
103 m_valuewidth = value;
104 refresh();
105 }
106 }
107
108 private int m_valuemargin = 5;
109 /// <summary>
110 /// 外圆值间距
111 /// </summary>
112 [description("外圆值间距"), category("自定义")]
113 public int valuemargin
114 {
115 get { return m_valuemargin; }
116 set
117 {
118 if (value < 0 || m_valuemargin >= m_valuewidth)
119 return;
120 m_valuemargin = value;
121 refresh();
122 }
123 }
124
125 private int m_maxvalue = 100;
126 /// <summary>
127 /// 最大值
128 /// </summary>
129 [description("最大值"), category("自定义")]
130 public int maxvalue
131 {
132 get { return m_maxvalue; }
133 set
134 {
135 if (value > m_value || value <= 0)
136 return;
137 m_maxvalue = value;
138 refresh();
139 }
140 }
141
142 private int m_value = 0;
143 /// <summary>
144 /// 当前值
145 /// </summary>
146 [description("当前值"), category("自定义")]
147 public int value
148 {
149 get { return m_value; }
150 set
151 {
152 if (m_maxvalue < value || value <= 0)
153 return;
154 m_value = value;
155 if (valuechanged != null)
156 {
157 valuechanged(this, null);
158 }
159 refresh();
160 }
161 }
162 private font m_font = new font("arial unicode ms", 20);
163 [description("文字字体"), category("自定义")]
164 public override font font
165 {
166 get
167 {
168 return m_font;
169 }
170 set
171 {
172 m_font = value;
173 refresh();
174 }
175 }
176 color m_forecolor = color.white;
177 [description("文字颜色"), category("自定义")]
178 public override color forecolor
179 {
180 get
181 {
182 return m_forecolor;
183 }
184 set
185 {
186 m_forecolor = value;
187 refresh();
188 }
189 }
190
191 private showtype m_showtype = showtype.ring;
192
193 [description("显示类型"), category("自定义")]
194 public showtype showtype
195 {
196 get { return m_showtype; }
197 set
198 {
199 m_showtype = value;
200 refresh();
201 }
202 }
203
204 public ucprocessellipse()
205 {
206 initializecomponent();
207 this.setstyle(controlstyles.allpaintinginwmpaint, true);
208 this.setstyle(controlstyles.doublebuffer, true);
209 this.setstyle(controlstyles.resizeredraw, true);
210 this.setstyle(controlstyles.selectable, true);
211 this.setstyle(controlstyles.supportstransparentbackcolor, true);
212 this.setstyle(controlstyles.userpaint, true);
213 }
214
215 protected override void onpaint(painteventargs e)
216 {
217 base.onpaint(e);
218
219 var g = e.graphics;
220 g.smoothingmode = smoothingmode.antialias; //使绘图质量最高，即消除锯齿
221 g.interpolationmode = interpolationmode.highqualitybicubic;
222 g.compositingquality = compositingquality.highquality;
223
224 int intwidth = math.min(this.size.width, this.size.height);
225 //底圆
226 g.fillellipse(new solidbrush(m_backellipsecolor), new rectangle(new point(0, 0), new size(intwidth, intwidth)));
227 if (m_showtype == hzh_controls.controls.showtype.ring)
228 {
229 //中心圆
230 int intcore = intwidth - m_valuewidth * 2;
231 g.fillellipse(new solidbrush(m_coreellipsecolor), new rectangle(new point(m_valuewidth, m_valuewidth), new size(intcore, intcore)));
232 //中心圆边框
233 if (m_isshowcoreellipseborder)
234 {
235 g.drawellipse(new pen(m_valuecolor, 2), new rectangle(new point(m_valuewidth + 1, m_valuewidth + 1), new size(intcore - 1, intcore - 1)));
236 }
237 if (m_value > 0 && m_maxvalue > 0)
238 {
239 float fltpercent = (float)m_value / (float)m_maxvalue;
240 if (fltpercent > 1)
241 {
242 fltpercent = 1;
243 }
244
245 g.drawarc(new pen(m_valuecolor, m_valuewidth - m_valuemargin * 2), new rectanglef(new point(m_valuewidth / 2 + m_valuemargin / 4, m_valuewidth / 2 + m_valuemargin / 4), new sizef(intwidth - m_valuewidth - m_valuemargin / 2 + (m_valuemargin == 0 ? 0 : 1), intwidth - m_valuewidth - m_valuemargin / 2 + (m_valuemargin == 0 ? 0 : 1))), -90, fltpercent * 360);
246
247 string strvaluetext = m_valuetype == hzh_controls.controls.valuetype.percent ? fltpercent.tostring("0%") : m_value.tostring();
248 system.drawing.sizef _txtsize = g.measurestring(strvaluetext, this.font);
249 g.drawstring(strvaluetext, this.font, new solidbrush(this.forecolor), new pointf((intwidth - _txtsize.width) / 2 + 1, (intwidth - _txtsize.height) / 2 + 1));
250 }
251 }
252 else
253 {
254 if (m_value > 0 && m_maxvalue > 0)
255 {
256 float fltpercent = (float)m_value / (float)m_maxvalue;
257 if (fltpercent > 1)
258 {
259 fltpercent = 1;
260 }
261
262 g.fillpie(new solidbrush(m_valuecolor), new rectangle(m_valuemargin, m_valuemargin, intwidth - m_valuemargin * 2, intwidth - m_valuemargin * 2), -90, fltpercent * 360);
263
264 string strvaluetext = m_valuetype == hzh_controls.controls.valuetype.percent ? fltpercent.tostring("0%") : m_value.tostring();
265 system.drawing.sizef _txtsize = g.measurestring(strvaluetext, this.font);
266 g.drawstring(strvaluetext, this.font, new solidbrush(this.forecolor), new pointf((intwidth - _txtsize.width) / 2 + 1, (intwidth - _txtsize.height) / 2 + 1));
267 }
268 }
269
270 }
271 }
272
273 public enum valuetype
274 {
275 /// <summary>
276 /// 百分比
277 /// </summary>
278 percent,
279 /// <summary>
280 /// 数值
281 /// </summary>
282 absolute
283 }
284
285 public enum showtype
286 {
287 /// <summary>
288 /// 圆环
289 /// </summary>
290 ring,
291 /// <summary>
292 /// 扇形
293 /// </summary>
294 sector
295 }
296 }
1 namespace hzh_controls.controls
2 {
3 partial class ucprocessellipse
4 {
5 /// <summary>
6 /// 必需的设计器变量。
7 /// </summary>
8 private system.componentmodel.icontainer components = null;
9
10 /// <summary>
11 /// 清理所有正在使用的资源。
12 /// </summary>
13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
14 protected override void dispose(bool disposing)
15 {
16 if (disposing && (components != null))
17 {
18 components.dispose();
19 }
20 base.dispose(disposing);
21 }
22
23 #region 组件设计器生成的代码
24
25 /// <summary>
26 /// 设计器支持所需的方法 - 不要
27 /// 使用代码编辑器修改此方法的内容。
28 /// </summary>
29 private void initializecomponent()
30 {
31 components = new system.componentmodel.container();
32 this.autoscalemode = system.windows.forms.autoscalemode.font;
33 }
34
35 #endregion
36 }
37 }
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