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：
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nuget
install-package hzh_controls
目录
用处及效果
准备工作
依然使用gdi+画图，不懂的先百度了解下
开始
添加一些枚举
1 public enum funelchartalignment
2 {
3 /// <summary>
4 /// the left
5 /// </summary>
6 left,
7 /// <summary>
8 /// the center
9 /// </summary>
10 center,
11 /// <summary>
12 /// the right
13 /// </summary>
14 right
15 }
16
17 public enum funelchartdirection
18 {
19 /// <summary>
20 /// up
21 /// </summary>
22 up,
23 /// <summary>
24 /// down
25 /// </summary>
26 down
27 }
添加一个项实体
1 public class funelchartitem
2 {
3 /// <summary>
4 /// gets or sets the text.
5 /// </summary>
6 /// <value>the text.</value>
7 public string text { get; set; }
8 /// <summary>
9 /// gets or sets the value.
10 /// </summary>
11 /// <value>the value.</value>
12 public float value { get; set; }
13 /// <summary>
14 /// gets or sets the color of the value.
15 /// </summary>
16 /// <value>the color of the value.</value>
17 public system.drawing.color? valuecolor { get; set; }
18 /// <summary>
19 /// gets or sets the color of the text fore.
20 /// </summary>
21 /// <value>the color of the text fore.</value>
22 public system.drawing.color? textforecolor { get; set; }
23 }
添加一个类ucfunnelchart ，继承usercontrol
添加一些控制属性
1 /// <summary>
2 /// the title
3 /// </summary>
4 private string title;
5 /// <summary>
6 /// gets or sets the title.
7 /// </summary>
8 /// <value>the title.</value>
9 [browsable(true)]
10 [category("自定义")]
11 [description("获取或设置标题")]
12 public string title
13 {
14 get { return title; }
15 set
16 {
17 title = value;
18 resettitlesize();
19 invalidate();
20 }
21 }
22
23 /// <summary>
24 /// the title font
25 /// </summary>
26 private font titlefont = new font("微软雅黑", 12);
27 /// <summary>
28 /// gets or sets the title font.
29 /// </summary>
30 /// <value>the title font.</value>
31 [browsable(true)]
32 [category("自定义")]
33 [description("获取或设置标题字体")]
34 public font titlefont
35 {
36 get { return titlefont; }
37 set
38 {
39 titlefont = value;
40 resettitlesize();
41 invalidate();
42 }
43 }
44
45 /// <summary>
46 /// the title fore color
47 /// </summary>
48 private color titleforecolor = color.black;
49 /// <summary>
50 /// gets or sets the color of the title fore.
51 /// </summary>
52 /// <value>the color of the title fore.</value>
53 [browsable(true)]
54 [category("自定义")]
55 [description("获取或设置标题文字颜色")]
56 public color titleforecolor
57 {
58 get { return titleforecolor; }
59 set
60 {
61 titleforecolor = value;
62 invalidate();
63 }
64 }
65 /// <summary>
66 /// the items
67 /// </summary>
68 private funelchartitem[] items;
69 /// <summary>
70 /// gets or sets the items.
71 /// </summary>
72 /// <value>the items.</value>
73 [browsable(true)]
74 [category("自定义")]
75 [description("获取或设置项目")]
76 public funelchartitem[] items
77 {
78 get { return items; }
79 set
80 {
81 items = value;
82 invalidate();
83 }
84 }
85
86 /// <summary>
87 /// the direction
88 /// </summary>
89 private funelchartdirection direction = funelchartdirection.up;
90 /// <summary>
91 /// gets or sets the direction.
92 /// </summary>
93 /// <value>the direction.</value>
94 [browsable(true)]
95 [category("自定义")]
96 [description("获取或设置方向")]
97 public funelchartdirection direction
98 {
99 get { return direction; }
100 set
101 {
102 direction = value;
103 invalidate();
104 }
105 }
106
107 /// <summary>
108 /// the alignment
109 /// </summary>
110 private funelchartalignment alignment = funelchartalignment.center;
111 /// <summary>
112 /// gets or sets the alignment.
113 /// </summary>
114 /// <value>the alignment.</value>
115 [browsable(true)]
116 [category("自定义")]
117 [description("获取或设置对齐方式")]
118 public funelchartalignment alignment
119 {
120 get { return alignment; }
121 set
122 {
123 alignment = value;
124 invalidate();
125 }
126 }
127
128 /// <summary>
129 /// the item text align
130 /// </summary>
131 private funelchartalignment itemtextalign = funelchartalignment.center;
132 /// <summary>
133 /// gets or sets the item text align.
134 /// </summary>
135 /// <value>the item text align.</value>
136 [browsable(true)]
137 [category("自定义")]
138 [description("获取或设置文字位置")]
139 public funelchartalignment itemtextalign
140 {
141 get { return itemtextalign; }
142 set
143 {
144 itemtextalign = value;
145 resetworkingrect();
146 invalidate();
147 }
148 }
149 /// <summary>
150 /// the show value
151 /// </summary>
152 private bool showvalue = false;
153 /// <summary>
154 /// gets or sets a value indicating whether [show value].
155 /// </summary>
156 /// <value><c>true</c> if [show value]; otherwise, <c>false</c>.</value>
157 [browsable(true)]
158 [category("自定义")]
159 [description("获取或设置是否显示值")]
160 public bool showvalue
161 {
162 get { return showvalue; }
163 set
164 {
165 showvalue = value;
166 invalidate();
167 }
168 }
169
170
171 /// <summary>
172 /// the value format
173 /// </summary>
174 private string valueformat = "0.##";
175 /// <summary>
176 /// gets or sets the value format.
177 /// </summary>
178 /// <value>the value format.</value>
179 [browsable(true)]
180 [category("自定义")]
181 [description("获取或设置值格式化")]
182 public string valueformat
183 {
184 get { return valueformat; }
185 set
186 {
187 valueformat = value;
188 invalidate();
189 }
190 }
191
192 /// <summary>
193 /// the m rect working
194 /// </summary>
195 rectanglef m_rectworking;
196 /// <summary>
197 /// the m title size
198 /// </summary>
199 sizef m_titlesize = sizef.empty;
200 /// <summary>
201 /// the int split width
202 /// </summary>
203 int intsplitwidth = 1;
构造函数初始化
1 public ucfunnelchart()
2 {
3 this.setstyle(controlstyles.allpaintinginwmpaint, true);
4 this.setstyle(controlstyles.doublebuffer, true);
5 this.setstyle(controlstyles.resizeredraw, true);
6 this.setstyle(controlstyles.selectable, true);
7 this.setstyle(controlstyles.supportstransparentbackcolor, true);
8 this.setstyle(controlstyles.userpaint, true);
9 this.fontchanged += ucfunnelchart_fontchanged;
10 font = new font("微软雅黑", 8);
11
12 this.autoscalemode = system.windows.forms.autoscalemode.none;
13 this.sizechanged += ucfunnelchart_sizechanged;
14 size = new system.drawing.size(150, 150);
15 items = new funelchartitem[0];
16 if (controlhelper.isdesignmode())
17 {
18 items = new funelchartitem[5];
19 for (int i = 0; i < 5; i++)
20 {
21 items[i] = new funelchartitem()
22 {
23 text = "item" + i,
24 value = 10 * (i + 1)
25 };
26 }
27 }
28 }
当大小及状态改变时 重新计算工作区域
1 void ucfunnelchart_fontchanged(object sender, eventargs e)
2 {
3 resetworkingrect();
4 }
5
6 /// <summary>
7 /// handles the sizechanged event of the ucfunnelchart control.
8 /// </summary>
9 /// <param name="sender">the source of the event.</param>
10 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
11 void ucfunnelchart_sizechanged(object sender, eventargs e)
12 {
13 resetworkingrect();
14 }
15
16 /// <summary>
17 /// resets the working rect.
18 /// </summary>
19 private void resetworkingrect()
20 {
21 if (itemtextalign == funelchartalignment.center)
22 {
23 m_rectworking = new rectanglef(0, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
24 }
25 else if (itemtextalign == funelchartalignment.left)
26 {
27 float fltmax = 0;
28 if (items != null && items.length > 0)
29 {
30 using (graphics g = this.creategraphics())
31 {
32 fltmax = items.max(p => g.measurestring(p.text, font).width);
33 }
34 }
35 m_rectworking = new rectanglef(fltmax, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width - fltmax, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
36 }
37 else
38 {
39 float fltmax = 0;
40 if (items != null && items.length > 0)
41 {
42 using (graphics g = this.creategraphics())
43 {
44 fltmax = items.max(p => g.measurestring(p.text, font).width);
45 }
46 }
47 m_rectworking = new rectanglef(0, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width - fltmax, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
48 }
49 }
50
51 /// <summary>
52 /// resets the size of the title.
53 /// </summary>
54 private void resettitlesize()
55 {
56 if (string.isnullorempty(title))
57 {
58 m_titlesize = sizef.empty;
59 }
60 else
61 {
62 using (graphics g = this.creategraphics())
63 {
64 m_titlesize = g.measurestring(title, titlefont);
65 m_titlesize.height += 20;
66 }
67 }
68 resetworkingrect();
69 }
重绘
1 protected override void onpaint(painteventargs e)
2 {
3 base.onpaint(e);
4 var g = e.graphics;
5 g.setgdihigh();
6
7 if (!string.isnullorempty(title))
8 {
9 g.drawstring(title, titlefont, new solidbrush(titleforecolor), new rectanglef(0, 0, this.width, m_titlesize.height), new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
10 }
11
12 if (items == null || items.length <= 0)
13 {
14 g.drawstring("没有数据", font, new solidbrush(color.black), this.m_rectworking, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
15 return;
16 }
17
18 list<funelchartitem> lstitems;
19 if (direction == funelchartdirection.up)
20 {
21 lstitems = items.orderby(p => p.value).tolist();
22 }
23 else
24 {
25 lstitems = items.orderbydescending(p => p.value).tolist();
26 }
27
28 list<rectanglef> lstrects = new list<rectanglef>();
29 list<graphicspath> lstpaths = new list<graphicspath>();
30 float maxvalue = lstitems.max(p => p.value);
31 float dblsplitheight = m_rectworking.height / lstitems.count;
32 for (int i = 0; i < lstitems.count; i++)
33 {
34 funelchartitem item = lstitems[i];
35 if (item.valuecolor == null || item.valuecolor == color.empty || item.valuecolor == color.transparent)
36 item.valuecolor = controlhelper.colors[i];
37
38 switch (alignment)
39 {
40 case funelchartalignment.left:
41 lstrects.add(new rectanglef(m_rectworking.left, m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
42 break;
43 case funelchartalignment.center:
44 lstrects.add(new rectanglef(m_rectworking.left + (m_rectworking.width - (item.value / maxvalue * m_rectworking.width)) / 2, m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
45 break;
46 case funelchartalignment.right:
47 lstrects.add(new rectanglef(m_rectworking.right - (item.value / maxvalue * m_rectworking.width), m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
48 break;
49 }
50 }
51
52 for (int i = 0; i < lstrects.count; i++)
53 {
54 var rect = lstrects[i];
55 graphicspath path = new graphicspath();
56 list<pointf> lstpoints = new list<pointf>();
57 if (direction == funelchartdirection.up)
58 {
59 switch (alignment)
60 {
61 case funelchartalignment.left:
62 lstpoints.add(new pointf(rect.left, rect.top));
63 if (i != 0)
64 {
65 lstpoints.add(new pointf(lstrects[i - 1].right, rect.top));
66 }
67 break;
68 case funelchartalignment.center:
69 if (i == 0)
70 {
71 lstpoints.add(new pointf(rect.left + rect.width / 2, rect.top));
72 }
73 else
74 {
75 lstpoints.add(new pointf(lstrects[i - 1].left, rect.top));
76 lstpoints.add(new pointf(lstrects[i - 1].right, rect.top));
77 }
78 break;
79 case funelchartalignment.right:
80 if (i == 0)
81 {
82 lstpoints.add(new pointf(rect.right, rect.top));
83 }
84 else
85 {
86 lstpoints.add(new pointf(rect.right - lstrects[i - 1].width, rect.top));
87 lstpoints.add(new pointf(rect.right, rect.top));
88 }
89 break;
90 }
91 lstpoints.add(new pointf(rect.right, rect.bottom - intsplitwidth));
92 lstpoints.add(new pointf(rect.left, rect.bottom - intsplitwidth));
93 }
94 else
95 {
96 lstpoints.add(new pointf(rect.left, rect.top + intsplitwidth));
97 lstpoints.add(new pointf(rect.right, rect.top + intsplitwidth));
98 switch (alignment)
99 {
100 case funelchartalignment.left:
101 if (i == lstrects.count - 1)
102 {
103 lstpoints.add(new pointf(rect.left, rect.bottom));
104 }
105 else
106 {
107 lstpoints.add(new pointf(lstrects[i + 1].right, rect.bottom));
108 lstpoints.add(new pointf(rect.left, rect.bottom));
109 }
110 break;
111 case funelchartalignment.center:
112 if (i == lstrects.count - 1)
113 {
114 lstpoints.add(new pointf(rect.left + rect.width / 2, rect.bottom));
115 }
116 else
117 {
118 lstpoints.add(new pointf(lstrects[i + 1].right, rect.bottom));
119 lstpoints.add(new pointf(lstrects[i + 1].left, rect.bottom));
120 }
121 break;
122 case funelchartalignment.right:
123 if (i == lstrects.count - 1)
124 {
125 lstpoints.add(new pointf(rect.right, rect.bottom));
126 }
127 else
128 {
129 lstpoints.add(new pointf(rect.right, rect.bottom));
130 lstpoints.add(new pointf(lstrects[i + 1].left, rect.bottom));
131 }
132 break;
133 }
134 }
135 path.addlines(lstpoints.toarray());
136 path.closeallfigures();
137 // g.drawpath(new pen(new solidbrush(lstitems[i].valuecolor.value)), path);
138 g.fillpath(new solidbrush(lstitems[i].valuecolor.value), path);
139
140 //写字
141 if (itemtextalign == funelchartalignment.center)
142 {
143 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? color.white : lstitems[i].textforecolor.value), rect, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
144 }
145 else if (itemtextalign == funelchartalignment.left)
146 {
147 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value), new rectanglef(0, rect.top, rect.left, rect.height), new stringformat() { alignment = stringalignment.far, linealignment = stringalignment.center });
148 g.drawline(new pen(new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value)), rect.left, rect.top + rect.height / 2, rect.left + rect.width / 2, rect.top + rect.height / 2);
149 }
150 else
151 {
152 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value), new rectanglef(rect.right, rect.top, this.width - rect.right, rect.height), new stringformat() { alignment = stringalignment.near, linealignment = stringalignment.center });
153 g.drawline(new pen(new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value)), rect.left + rect.width / 2, rect.top + rect.height / 2, rect.right, rect.top + rect.height / 2);
154 }
155 }
156 }
完整代码
1 // ***********************************************************************
2 // assembly : hzh_controls
3 // created : 2019-09-26
4 //
5 // ***********************************************************************
6 // <copyright file="ucfunnelchart.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 ucfunnelchart.
29 /// implements the <see cref="system.windows.forms.usercontrol" />
30 /// </summary>
31 /// <seealso cref="system.windows.forms.usercontrol" />
32 public class ucfunnelchart : usercontrol
33 {
34 /// <summary>
35 /// the title
36 /// </summary>
37 private string title;
38 /// <summary>
39 /// gets or sets the title.
40 /// </summary>
41 /// <value>the title.</value>
42 [browsable(true)]
43 [category("自定义")]
44 [description("获取或设置标题")]
45 public string title
46 {
47 get { return title; }
48 set
49 {
50 title = value;
51 resettitlesize();
52 invalidate();
53 }
54 }
55
56 /// <summary>
57 /// the title font
58 /// </summary>
59 private font titlefont = new font("微软雅黑", 12);
60 /// <summary>
61 /// gets or sets the title font.
62 /// </summary>
63 /// <value>the title font.</value>
64 [browsable(true)]
65 [category("自定义")]
66 [description("获取或设置标题字体")]
67 public font titlefont
68 {
69 get { return titlefont; }
70 set
71 {
72 titlefont = value;
73 resettitlesize();
74 invalidate();
75 }
76 }
77
78 /// <summary>
79 /// the title fore color
80 /// </summary>
81 private color titleforecolor = color.black;
82 /// <summary>
83 /// gets or sets the color of the title fore.
84 /// </summary>
85 /// <value>the color of the title fore.</value>
86 [browsable(true)]
87 [category("自定义")]
88 [description("获取或设置标题文字颜色")]
89 public color titleforecolor
90 {
91 get { return titleforecolor; }
92 set
93 {
94 titleforecolor = value;
95 invalidate();
96 }
97 }
98 /// <summary>
99 /// the items
100 /// </summary>
101 private funelchartitem[] items;
102 /// <summary>
103 /// gets or sets the items.
104 /// </summary>
105 /// <value>the items.</value>
106 [browsable(true)]
107 [category("自定义")]
108 [description("获取或设置项目")]
109 public funelchartitem[] items
110 {
111 get { return items; }
112 set
113 {
114 items = value;
115 invalidate();
116 }
117 }
118
119 /// <summary>
120 /// the direction
121 /// </summary>
122 private funelchartdirection direction = funelchartdirection.up;
123 /// <summary>
124 /// gets or sets the direction.
125 /// </summary>
126 /// <value>the direction.</value>
127 [browsable(true)]
128 [category("自定义")]
129 [description("获取或设置方向")]
130 public funelchartdirection direction
131 {
132 get { return direction; }
133 set
134 {
135 direction = value;
136 invalidate();
137 }
138 }
139
140 /// <summary>
141 /// the alignment
142 /// </summary>
143 private funelchartalignment alignment = funelchartalignment.center;
144 /// <summary>
145 /// gets or sets the alignment.
146 /// </summary>
147 /// <value>the alignment.</value>
148 [browsable(true)]
149 [category("自定义")]
150 [description("获取或设置对齐方式")]
151 public funelchartalignment alignment
152 {
153 get { return alignment; }
154 set
155 {
156 alignment = value;
157 invalidate();
158 }
159 }
160
161 /// <summary>
162 /// the item text align
163 /// </summary>
164 private funelchartalignment itemtextalign = funelchartalignment.center;
165 /// <summary>
166 /// gets or sets the item text align.
167 /// </summary>
168 /// <value>the item text align.</value>
169 [browsable(true)]
170 [category("自定义")]
171 [description("获取或设置文字位置")]
172 public funelchartalignment itemtextalign
173 {
174 get { return itemtextalign; }
175 set
176 {
177 itemtextalign = value;
178 resetworkingrect();
179 invalidate();
180 }
181 }
182 /// <summary>
183 /// the show value
184 /// </summary>
185 private bool showvalue = false;
186 /// <summary>
187 /// gets or sets a value indicating whether [show value].
188 /// </summary>
189 /// <value><c>true</c> if [show value]; otherwise, <c>false</c>.</value>
190 [browsable(true)]
191 [category("自定义")]
192 [description("获取或设置是否显示值")]
193 public bool showvalue
194 {
195 get { return showvalue; }
196 set
197 {
198 showvalue = value;
199 invalidate();
200 }
201 }
202
203
204 /// <summary>
205 /// the value format
206 /// </summary>
207 private string valueformat = "0.##";
208 /// <summary>
209 /// gets or sets the value format.
210 /// </summary>
211 /// <value>the value format.</value>
212 [browsable(true)]
213 [category("自定义")]
214 [description("获取或设置值格式化")]
215 public string valueformat
216 {
217 get { return valueformat; }
218 set
219 {
220 valueformat = value;
221 invalidate();
222 }
223 }
224
225 /// <summary>
226 /// the m rect working
227 /// </summary>
228 rectanglef m_rectworking;
229 /// <summary>
230 /// the m title size
231 /// </summary>
232 sizef m_titlesize = sizef.empty;
233 /// <summary>
234 /// the int split width
235 /// </summary>
236 int intsplitwidth = 1;
237
238 /// <summary>
239 /// initializes a new instance of the <see cref="ucfunnelchart"/> class.
240 /// </summary>
241 public ucfunnelchart()
242 {
243 this.setstyle(controlstyles.allpaintinginwmpaint, true);
244 this.setstyle(controlstyles.doublebuffer, true);
245 this.setstyle(controlstyles.resizeredraw, true);
246 this.setstyle(controlstyles.selectable, true);
247 this.setstyle(controlstyles.supportstransparentbackcolor, true);
248 this.setstyle(controlstyles.userpaint, true);
249 this.fontchanged += ucfunnelchart_fontchanged;
250 font = new font("微软雅黑", 8);
251
252 this.autoscalemode = system.windows.forms.autoscalemode.none;
253 this.sizechanged += ucfunnelchart_sizechanged;
254 size = new system.drawing.size(150, 150);
255 items = new funelchartitem[0];
256 if (controlhelper.isdesignmode())
257 {
258 items = new funelchartitem[5];
259 for (int i = 0; i < 5; i++)
260 {
261 items[i] = new funelchartitem()
262 {
263 text = "item" + i,
264 value = 10 * (i + 1)
265 };
266 }
267 }
268 }
269
270 /// <summary>
271 /// handles the fontchanged event of the ucfunnelchart control.
272 /// </summary>
273 /// <param name="sender">the source of the event.</param>
274 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
275 void ucfunnelchart_fontchanged(object sender, eventargs e)
276 {
277 resetworkingrect();
278 }
279
280 /// <summary>
281 /// handles the sizechanged event of the ucfunnelchart control.
282 /// </summary>
283 /// <param name="sender">the source of the event.</param>
284 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
285 void ucfunnelchart_sizechanged(object sender, eventargs e)
286 {
287 resetworkingrect();
288 }
289
290 /// <summary>
291 /// resets the working rect.
292 /// </summary>
293 private void resetworkingrect()
294 {
295 if (itemtextalign == funelchartalignment.center)
296 {
297 m_rectworking = new rectanglef(0, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
298 }
299 else if (itemtextalign == funelchartalignment.left)
300 {
301 float fltmax = 0;
302 if (items != null && items.length > 0)
303 {
304 using (graphics g = this.creategraphics())
305 {
306 fltmax = items.max(p => g.measurestring(p.text, font).width);
307 }
308 }
309 m_rectworking = new rectanglef(fltmax, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width - fltmax, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
310 }
311 else
312 {
313 float fltmax = 0;
314 if (items != null && items.length > 0)
315 {
316 using (graphics g = this.creategraphics())
317 {
318 fltmax = items.max(p => g.measurestring(p.text, font).width);
319 }
320 }
321 m_rectworking = new rectanglef(0, m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10), this.width - fltmax, this.height - (m_titlesize.height == 0 ? 0 : (m_titlesize.height + 10)));
322 }
323 }
324
325 /// <summary>
326 /// resets the size of the title.
327 /// </summary>
328 private void resettitlesize()
329 {
330 if (string.isnullorempty(title))
331 {
332 m_titlesize = sizef.empty;
333 }
334 else
335 {
336 using (graphics g = this.creategraphics())
337 {
338 m_titlesize = g.measurestring(title, titlefont);
339 m_titlesize.height += 20;
340 }
341 }
342 resetworkingrect();
343 }
344
345 /// <summary>
346 /// 引发 <see cref="e:system.windows.forms.control.paint" /> 事件。
347 /// </summary>
348 /// <param name="e">包含事件数据的 <see cref="t:system.windows.forms.painteventargs" />。</param>
349 protected override void onpaint(painteventargs e)
350 {
351 base.onpaint(e);
352 var g = e.graphics;
353 g.setgdihigh();
354
355 if (!string.isnullorempty(title))
356 {
357 g.drawstring(title, titlefont, new solidbrush(titleforecolor), new rectanglef(0, 0, this.width, m_titlesize.height), new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
358 }
359
360 if (items == null || items.length <= 0)
361 {
362 g.drawstring("没有数据", font, new solidbrush(color.black), this.m_rectworking, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
363 return;
364 }
365
366 list<funelchartitem> lstitems;
367 if (direction == funelchartdirection.up)
368 {
369 lstitems = items.orderby(p => p.value).tolist();
370 }
371 else
372 {
373 lstitems = items.orderbydescending(p => p.value).tolist();
374 }
375
376 list<rectanglef> lstrects = new list<rectanglef>();
377 list<graphicspath> lstpaths = new list<graphicspath>();
378 float maxvalue = lstitems.max(p => p.value);
379 float dblsplitheight = m_rectworking.height / lstitems.count;
380 for (int i = 0; i < lstitems.count; i++)
381 {
382 funelchartitem item = lstitems[i];
383 if (item.valuecolor == null || item.valuecolor == color.empty || item.valuecolor == color.transparent)
384 item.valuecolor = controlhelper.colors[i];
385
386 switch (alignment)
387 {
388 case funelchartalignment.left:
389 lstrects.add(new rectanglef(m_rectworking.left, m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
390 break;
391 case funelchartalignment.center:
392 lstrects.add(new rectanglef(m_rectworking.left + (m_rectworking.width - (item.value / maxvalue * m_rectworking.width)) / 2, m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
393 break;
394 case funelchartalignment.right:
395 lstrects.add(new rectanglef(m_rectworking.right - (item.value / maxvalue * m_rectworking.width), m_rectworking.top + dblsplitheight * i, item.value / maxvalue * m_rectworking.width, dblsplitheight));
396 break;
397 }
398 }
399
400 for (int i = 0; i < lstrects.count; i++)
401 {
402 var rect = lstrects[i];
403 graphicspath path = new graphicspath();
404 list<pointf> lstpoints = new list<pointf>();
405 if (direction == funelchartdirection.up)
406 {
407 switch (alignment)
408 {
409 case funelchartalignment.left:
410 lstpoints.add(new pointf(rect.left, rect.top));
411 if (i != 0)
412 {
413 lstpoints.add(new pointf(lstrects[i - 1].right, rect.top));
414 }
415 break;
416 case funelchartalignment.center:
417 if (i == 0)
418 {
419 lstpoints.add(new pointf(rect.left + rect.width / 2, rect.top));
420 }
421 else
422 {
423 lstpoints.add(new pointf(lstrects[i - 1].left, rect.top));
424 lstpoints.add(new pointf(lstrects[i - 1].right, rect.top));
425 }
426 break;
427 case funelchartalignment.right:
428 if (i == 0)
429 {
430 lstpoints.add(new pointf(rect.right, rect.top));
431 }
432 else
433 {
434 lstpoints.add(new pointf(rect.right - lstrects[i - 1].width, rect.top));
435 lstpoints.add(new pointf(rect.right, rect.top));
436 }
437 break;
438 }
439 lstpoints.add(new pointf(rect.right, rect.bottom - intsplitwidth));
440 lstpoints.add(new pointf(rect.left, rect.bottom - intsplitwidth));
441 }
442 else
443 {
444 lstpoints.add(new pointf(rect.left, rect.top + intsplitwidth));
445 lstpoints.add(new pointf(rect.right, rect.top + intsplitwidth));
446 switch (alignment)
447 {
448 case funelchartalignment.left:
449 if (i == lstrects.count - 1)
450 {
451 lstpoints.add(new pointf(rect.left, rect.bottom));
452 }
453 else
454 {
455 lstpoints.add(new pointf(lstrects[i + 1].right, rect.bottom));
456 lstpoints.add(new pointf(rect.left, rect.bottom));
457 }
458 break;
459 case funelchartalignment.center:
460 if (i == lstrects.count - 1)
461 {
462 lstpoints.add(new pointf(rect.left + rect.width / 2, rect.bottom));
463 }
464 else
465 {
466 lstpoints.add(new pointf(lstrects[i + 1].right, rect.bottom));
467 lstpoints.add(new pointf(lstrects[i + 1].left, rect.bottom));
468 }
469 break;
470 case funelchartalignment.right:
471 if (i == lstrects.count - 1)
472 {
473 lstpoints.add(new pointf(rect.right, rect.bottom));
474 }
475 else
476 {
477 lstpoints.add(new pointf(rect.right, rect.bottom));
478 lstpoints.add(new pointf(lstrects[i + 1].left, rect.bottom));
479 }
480 break;
481 }
482 }
483 path.addlines(lstpoints.toarray());
484 path.closeallfigures();
485 // g.drawpath(new pen(new solidbrush(lstitems[i].valuecolor.value)), path);
486 g.fillpath(new solidbrush(lstitems[i].valuecolor.value), path);
487
488 //写字
489 if (itemtextalign == funelchartalignment.center)
490 {
491 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? color.white : lstitems[i].textforecolor.value), rect, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
492 }
493 else if (itemtextalign == funelchartalignment.left)
494 {
495 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value), new rectanglef(0, rect.top, rect.left, rect.height), new stringformat() { alignment = stringalignment.far, linealignment = stringalignment.center });
496 g.drawline(new pen(new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value)), rect.left, rect.top + rect.height / 2, rect.left + rect.width / 2, rect.top + rect.height / 2);
497 }
498 else
499 {
500 g.drawstring(lstitems[i].text + (showvalue ? lstitems[i].value.tostring("\n" + valueformat) : ""), font, new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value), new rectanglef(rect.right, rect.top, this.width - rect.right, rect.height), new stringformat() { alignment = stringalignment.near, linealignment = stringalignment.center });
501 g.drawline(new pen(new solidbrush((lstitems[i].textforecolor == null || lstitems[i].textforecolor == color.empty || lstitems[i].textforecolor == color.transparent) ? lstitems[i].valuecolor.value : lstitems[i].textforecolor.value)), rect.left + rect.width / 2, rect.top + rect.height / 2, rect.right, rect.top + rect.height / 2);
502 }
503 }
504 }
505 }
506 }
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