（八十一）c#Winform自定义控件-时间轴
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_control.git
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NuGet
Install-Package HZH_Controls
目录
https://blog.csdn.net/kwwwvagaa/article/details/100586547
用处及效果
准备工作
没什么可准备的，直接开干吧。
思路：
2个panel，分别放标题和明细
然后重绘控件，在标题旁边画圆并且连线
开始
添加一个类来存放节点信息
1 public class TimeLineItem
2 {
3 ///
4 /// Gets or sets the title.
5 ///
6 /// The title.
7 public string Title { get; set; }
8 ///
9 /// Gets or sets the details.
10 ///
11 /// The details.
12 public string Details { get; set; }
13 }
添加一个用户控件UCTimeLine
添加一些属性
1 ///2 /// The line color 3 /// 4 private Color lineColor = TextColors.Light; 5 6 ///7 /// Gets or sets the color of the line. 8 /// 9 ///The color of the line. 10 [Description("连接线颜色"), Category("自定义")] 11 public Color LineColor 12 { 13 get { return lineColor; } 14 set 15 { 16 lineColor = value; 17 Invalidate(); 18 } 19 } 20 ///21 /// The title font 22 /// 23 private Font titleFont = new Font("微软雅黑", 14f); 24 25 ///26 /// Gets or sets the title font. 27 /// 28 ///The title font. 29 [Description("标题字体"), Category("自定义")] 30 public Font TitleFont 31 { 32 get { return titleFont; } 33 set 34 { 35 titleFont = value; 36 ReloadItems(); 37 } 38 } 39 40 ///41 /// The title forcolor 42 /// 43 private Color titleForcolor = TextColors.MoreDark; 44 45 ///46 /// Gets or sets the title forcolor. 47 /// 48 ///The title forcolor. 49 [Description("标题颜色"), Category("自定义")] 50 public Color TitleForcolor 51 { 52 get { return titleForcolor; } 53 set 54 { 55 titleForcolor = value; 56 ReloadItems(); 57 } 58 } 59 60 ///61 /// The details font 62 /// 63 private Font detailsFont = new Font("微软雅黑", 10); 64 65 ///66 /// Gets or sets the details font. 67 /// 68 ///The details font. 69 [Description("详情字体"), Category("自定义")] 70 public Font DetailsFont 71 { 72 get { return detailsFont; } 73 set 74 { 75 detailsFont = value; 76 ReloadItems(); 77 } 78 } 79 80 ///81 /// The details forcolor 82 /// 83 private Color detailsForcolor = TextColors.Light; 84 85 ///86 /// Gets or sets the details forcolor. 87 /// 88 ///The details forcolor. 89 [Description("详情颜色"), Category("自定义")] 90 public Color DetailsForcolor 91 { 92 get { return detailsForcolor; } 93 set 94 { 95 detailsForcolor = value; 96 ReloadItems(); 97 } 98 } 99 100 ///101 /// The items 102 /// 103 TimeLineItem[] items; 104 105 ///106 /// Gets or sets the items. 107 /// 108 ///The items. 109 [Description("项列表"), Category("自定义")] 110 public TimeLineItem[] Items 111 { 112 get { return items; } 113 set 114 { 115 items = value; 116 ReloadItems(); 117 } 118 }
构造函数初始化一些东西
1 public UCTimeLine()
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 InitializeComponent();
10 items = new TimeLineItem[0];
11 if (ControlHelper.IsDesignMode())
12 {
13 items = new TimeLineItem[4];
14 for (int i = 0; i < 4; i++)
15 {
16 items[i] = new TimeLineItem()
17 {
18 Title = DateTime.Now.AddMonths(-1 * (3 - i)).ToString("yyyy年MM月"),
19 Details = DateTime.Now.AddMonths(-1 * (3 - i)).ToString("yyyy年MM月") + "发生了一件大事，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，咔嚓一声打了一个炸雷，然后王二麻子他爹王咔嚓出生了。"
20 };
21 }
22 ReloadItems();
23 }
24 }
重新加载列表
1 private void ReloadItems()
2 {
3 try
4 {
5 ControlHelper.FreezeControl(this, true);
6 this.Controls.Clear();
7 if (items != null)
8 {
9 foreach (var item in items)
10 {
11 FlowLayoutPanel panelTitle = new FlowLayoutPanel();
12 panelTitle.Dock = DockStyle.Top;
13 panelTitle.AutoScroll = false;
14 panelTitle.Padding = new System.Windows.Forms.Padding(5);
15 panelTitle.Name = "title_" + Guid.NewGuid().ToString();
16
17 Label lblTitle = new Label();
18 lblTitle.Dock = DockStyle.Top;
19 lblTitle.AutoSize = true;
20 lblTitle.Font = titleFont;
21 lblTitle.ForeColor = titleForcolor;
22 lblTitle.Text = item.Title;
23 lblTitle.SizeChanged += item_SizeChanged;
24 panelTitle.Controls.Add(lblTitle);
25 this.Controls.Add(panelTitle);
26 panelTitle.BringToFront();
27
28
29 FlowLayoutPanel panelDetails = new FlowLayoutPanel();
30 panelDetails.Dock = DockStyle.Top;
31 panelDetails.AutoScroll = false;
32 panelDetails.Padding = new System.Windows.Forms.Padding(5);
33 panelDetails.Name = "details_" + Guid.NewGuid().ToString();
34 Label lblDetails = new Label();
35 lblDetails.AutoSize = true;
36 lblDetails.Dock = DockStyle.Top;
37 lblDetails.Font = detailsFont;
38 lblDetails.ForeColor = detailsForcolor;
39 lblDetails.Text = item.Details;
40 lblDetails.SizeChanged += item_SizeChanged;
41 panelDetails.Controls.Add(lblDetails);
42 this.Controls.Add(panelDetails);
43 panelDetails.BringToFront();
44
45 }
46 }
47 }
48 finally
49 {
50 ControlHelper.FreezeControl(this, false);
51 }
52 }
当文本大小改变时改变面板大小
1 void item_SizeChanged(object sender, EventArgs e)
2 {
3 Label lbl = (Label)sender;
4 lbl.Parent.Height = lbl.Height + 10;
5 }
重绘来画圆和连线
1 protected override void OnPaint(PaintEventArgs e)
2 {
3 base.OnPaint(e);
4 var g = e.Graphics;
5 g.SetGDIHigh();
6 var lst = this.Controls.ToArray().Where(p => p.Name.StartsWith("title_")).ToList();
7 for (int i = 0; i < lst.Count; i++)
8 {
9 //画圆
10 g.DrawEllipse(new Pen(new SolidBrush(lineColor)), new Rectangle(7, lst[i].Location.Y + 10, 16, 16));
11 //划线
12 if (i != lst.Count - 1)
13 {
14 g.DrawLine(new Pen(new SolidBrush(lineColor)), new Point(7 + 8, lst[i].Location.Y + 10 - 2), new Point(7 + 8, lst[i + 1].Location.Y + 10 + 16 + 2));
15 }
16 }
17 }
最后的话
如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧