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：
如果觉得写的还行，请点个 star 支持一下吧
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nuget
install-package hzh_controls
目录
用处及效果
准备工作
主要用的就是停靠窗体了，（十九）c#winform自定义控件-停靠窗体，不了解的可以先去看一下
思路：
通过实体对象设置的对齐方式来实现左右对齐，
当鼠标进入一项的时候，判断是否弹出下拉列表，或关闭其他列表
开始
添加一个类用来设置节点信息
1 public class navigationmenuitem
2 {
3 /// <summary>
4 /// the icon
5 /// </summary>
6 private image icon;
7 /// <summary>
8 /// gets or sets the icon.
9 /// </summary>
10 /// <value>the icon.</value>
11 [description("图标，仅顶级节点有效")]
12 public image icon
13 {
14 get { return icon; }
15 set { icon = value; }
16 }
17
18 /// <summary>
19 /// the text
20 /// </summary>
21 private string text;
22 /// <summary>
23 /// gets or sets the text.
24 /// </summary>
25 /// <value>the text.</value>
26
27 [description("文本")]
28 public string text
29 {
30 get { return text; }
31 set { text = value; }
32 }
33
34 /// <summary>
35 /// the show tip
36 /// </summary>
37 private bool showtip;
38 /// <summary>
39 /// gets or sets a value indicating whether [show tip].当tiptext为空时只显示一个小圆点，否则显示tiptext文字
40 /// </summary>
41 /// <value><c>true</c> if [show tip]; otherwise, <c>false</c>.</value>
42 [description("是否显示角标，仅顶级节点有效")]
43 public bool showtip
44 {
45 get { return showtip; }
46 set { showtip = value; }
47 }
48
49 /// <summary>
50 /// the tip text
51 /// </summary>
52 private string tiptext;
53 /// <summary>
54 /// gets or sets the tip text
55 /// </summary>
56 /// <value>the tip text.</value>
57 [description("角标文字，仅顶级节点有效")]
58 public string tiptext
59 {
60 get { return tiptext; }
61 set { tiptext = value; }
62 }
63 /// <summary>
64 /// the items
65 /// </summary>
66 private navigationmenuitem[] items;
67 /// <summary>
68 /// gets or sets the items.
69 /// </summary>
70 /// <value>the items.</value>
71 [description("子项列表")]
72 public navigationmenuitem[] items
73 {
74 get { return items; }
75 set
76 {
77 items = value;
78 if (value != null)
79 {
80 foreach (var item in value)
81 {
82 item.parentitem = this;
83 }
84 }
85 }
86 }
87
88 /// <summary>
89 /// the anchor right
90 /// </summary>
91 private bool anchorright;
92
93 /// <summary>
94 /// gets or sets a value indicating whether [anchor right].
95 /// </summary>
96 /// <value><c>true</c> if [anchor right]; otherwise, <c>false</c>.</value>
97 [description("是否靠右对齐")]
98 public bool anchorright
99 {
100 get { return anchorright; }
101 set { anchorright = value; }
102 }
103
104 /// <summary>
105 /// the item width
106 /// </summary>
107 private int itemwidth = 100;
108
109 /// <summary>
110 /// gets or sets the width of the item.
111 /// </summary>
112 /// <value>the width of the item.</value>
113 [description("宽度")]
114 public int itemwidth
115 {
116 get { return itemwidth; }
117 set { itemwidth = value; }
118 }
119
120 /// <summary>
121 /// gets or sets the data source.
122 /// </summary>
123 /// <value>the data source.</value>
124 [description("数据源")]
125 public object datasource { get; set; }
126 /// <summary>
127 /// gets or sets a value indicating whether this instance has split lint at top.
128 /// </summary>
129 /// <value><c>true</c> if this instance has split lint at top; otherwise, <c>false</c>.</value>
130 [description("是否在此项顶部显示一个分割线")]
131 public bool hassplitlintattop { get; set; }
132
133 /// <summary>
134 /// gets the parent item.
135 /// </summary>
136 /// <value>the parent item.</value>
137 [description("父节点")]
138 public navigationmenuitem parentitem { get; private set; }
139 }
添加一个自定义控件ucnavigationmenu
添加一些属性
1 /// <summary>
2 /// occurs when [click itemed].
3 /// </summary>
4 [description("点击节点事件"), category("自定义")]
5
6 public event eventhandler clickitemed;
7 /// <summary>
8 /// the select item
9 /// </summary>
10 private navigationmenuitem selectitem = null;
11
12 /// <summary>
13 /// gets the select item.
14 /// </summary>
15 /// <value>the select item.</value>
16 [description("选中的节点"), category("自定义")]
17 public navigationmenuitem selectitem
18 {
19 get { return selectitem; }
20 private set { selectitem = value; }
21 }
22
23
24 /// <summary>
25 /// the items
26 /// </summary>
27 navigationmenuitem[] items;
28
29 /// <summary>
30 /// gets or sets the items.
31 /// </summary>
32 /// <value>the items.</value>
33 [description("节点列表"), category("自定义")]
34 public navigationmenuitem[] items
35 {
36 get { return items; }
37 set
38 {
39 items = value;
40 reloadmenu();
41 }
42 }
43
44 /// <summary>
45 /// the tip color
46 /// </summary>
47 private color tipcolor = color.fromargb(255, 87, 34);
48
49 /// <summary>
50 /// gets or sets the color of the tip.
51 /// </summary>
52 /// <value>the color of the tip.</value>
53 [description("角标颜色"), category("自定义")]
54 public color tipcolor
55 {
56 get { return tipcolor; }
57 set { tipcolor = value; }
58 }
59
60 /// <summary>
61 /// 获取或设置控件的前景色。
62 /// </summary>
63 /// <value>the color of the fore.</value>
64 /// <permissionset>
65 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
66 /// </permissionset>
67 public override system.drawing.color forecolor
68 {
69 get
70 {
71 return base.forecolor;
72 }
73 set
74 {
75 base.forecolor = value;
76 foreach (control c in this.controls)
77 {
78 c.forecolor = value;
79 }
80 }
81 }
82 /// <summary>
83 /// 获取或设置控件显示的文字的字体。
84 /// </summary>
85 /// <value>the font.</value>
86 /// <permissionset>
87 /// <ipermission class="system.security.permissions.environmentpermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
88 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
89 /// <ipermission class="system.security.permissions.securitypermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" flags="unmanagedcode, controlevidence" />
90 /// <ipermission class="system.diagnostics.performancecounterpermission, system, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
91 /// </permissionset>
92 public override font font
93 {
94 get
95 {
96 return base.font;
97 }
98 set
99 {
100 base.font = value;
101 foreach (control c in this.controls)
102 {
103 c.font = value;
104 }
105 }
106 }
107
108 /// <summary>
109 /// the m lst anchors
110 /// </summary>
111 dictionary<navigationmenuitem, frmanchor> m_lstanchors = new dictionary<navigationmenuitem, frmanchor>();
重载菜单
1 private void reloadmenu()
2 {
3 try
4 {
5 controlhelper.freezecontrol(this, true);
6 this.controls.clear();
7 if (items != null && items.length > 0)
8 {
9 foreach (var item in items)
10 {
11 var menu = (navigationmenuitem)item;
12 label lbl = new label();
13 lbl.autosize = false;
14 lbl.textalign = contentalignment.middlecenter;
15 lbl.width = menu.itemwidth;
16 lbl.text = menu.text;
17
18 lbl.font = font;
19 lbl.forecolor = forecolor;
20
21 lbl.paint += lbl_paint;
22 lbl.mouseenter += lbl_mouseenter;
23 lbl.tag = menu;
24 lbl.click += lbl_click;
25 if (menu.anchorright)
26 {
27 lbl.dock = dockstyle.right;
28 }
29 else
30 {
31 lbl.dock = dockstyle.left;
32 }
33 this.controls.add(lbl);
34
35 lbl.bringtofront();
36 }
37
38
39 }
40 }
41 finally
42 {
43 controlhelper.freezecontrol(this, false);
44 }
45 }
显示下级菜单
1 private void showmoremenu(label lbl)
2 {
3 var menu = (navigationmenuitem)lbl.tag;
4 if (checkshow(menu))
5 {
6 if (menu.items != null && menu.items.length > 0)
7 {
8 panel panel = new panel();
9 panel.backcolor = color.white;
10 panel.paint += panel_paint;
11 panel.padding = new system.windows.forms.padding(1);
12 size size = getitemssize(menu.items);
13 var height = size.height * menu.items.length + 2;
14 height += menu.items.count(p => p.hassplitlintattop);//分割线
15 if (size.width < lbl.width)
16 size.width = lbl.width;
17 panel.size = new size(size.width, height);
18
19 foreach (var item in menu.items)
20 {
21 if (item.hassplitlintattop)
22 {
23 ucsplitline_h line = new ucsplitline_h();
24 line.dock = dockstyle.top;
25 panel.controls.add(line);
26 line.bringtofront();
27 }
28 label _lbl = new label();
29 _lbl.font = font;
30 _lbl.forecolor = this.backcolor;
31 _lbl.autosize = false;
32 _lbl.textalign = contentalignment.middlecenter;
33 _lbl.height = size.height;
34 _lbl.text = item.text;
35 _lbl.dock = dockstyle.top;
36 _lbl.bringtofront();
37 _lbl.paint += lbl_paint;
38 _lbl.mouseenter += lbl_mouseenter;
39 _lbl.tag = item;
40 _lbl.click += lbl_click;
41 _lbl.size = new system.drawing.size(size.width, size.height);
42 panel.controls.add(_lbl);
43 _lbl.bringtofront();
44 }
45 point point = point.empty;
46
47 if (menu.parentitem != null)
48 {
49 point p = lbl.parent.pointtoscreen(lbl.location);
50 if (p.x + lbl.width + panel.width > screen.primaryscreen.bounds.width)
51 {
52 point = new point(-1 * panel.width - 2, -1 * lbl.height);
53 }
54 else
55 {
56 point = new point(panel.width + 2, -1 * lbl.height);
57 }
58 }
59 m_lstanchors[menu] = new frmanchor(lbl, panel, point);
60 m_lstanchors[menu].formclosing += ucnavigationmenu_formclosing;
61 m_lstanchors[menu].show();
62 m_lstanchors[menu].size = new size(size.width, height);
63 }
64 }
65
66 }
辅助函数
1 /// <summary>
2 /// checks the show.
3 /// </summary>
4 /// <param name="menu">the menu.</param>
5 /// <returns><c>true</c> if xxxx, <c>false</c> otherwise.</returns>
6 private bool checkshow(navigationmenuitem menu)
7 {
8 //检查已经打开的节点
9 if (m_lstanchors.containskey(menu))
10 {
11 closelist(menu);
12 return false;
13 }
14 if (hasincachechild(menu))
15 {
16 if (m_lstanchors.containskey(menu.parentitem))
17 {
18 closelist(menu.parentitem);
19 return true;
20 }
21 return false;
22 }
23 else
24 {
25 for (int i = 0; i < 1; )
26 {
27 try
28 {
29 foreach (var item in m_lstanchors)
30 {
31 if (m_lstanchors[item.key] != null && !m_lstanchors[item.key].isdisposed)
32 {
33 m_lstanchors[item.key].close();
34 }
35 }
36 }
37 catch
38 {
39 continue;
40 }
41 i++;
42 }
43 m_lstanchors.clear();
44 return true;
45 }
46 }
47
48 /// <summary>
49 /// determines whether [has in cache child] [the specified menu].
50 /// </summary>
51 /// <param name="menu">the menu.</param>
52 /// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>
53 private bool hasincachechild(navigationmenuitem menu)
54 {
55 foreach (var item in m_lstanchors)
56 {
57 if (item.key == menu)
58 {
59 return true;
60 }
61 else
62 {
63 if (item.key.items != null)
64 {
65 if (item.key.items.contains(menu))
66 return true;
67 }
68 }
69 }
70 return false;
71 }
72
73 /// <summary>
74 /// closes the list.
75 /// </summary>
76 /// <param name="menu">the menu.</param>
77 private void closelist(navigationmenuitem menu)
78 {
79 if (menu.items != null)
80 {
81 foreach (var item in menu.items)
82 {
83 closelist(item);
84 if (m_lstanchors.containskey(item))
85 {
86 if (m_lstanchors[item] != null && !m_lstanchors[item].isdisposed)
87 {
88 m_lstanchors[item].close();
89 m_lstanchors[item] = null;
90 m_lstanchors.remove(item);
91 }
92 }
93 }
94 }
95 }
一些事件
1 /// <summary>
2 /// handles the click event of the lbl control.
3 /// </summary>
4 /// <param name="sender">the source of the event.</param>
5 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
6 void lbl_click(object sender, eventargs e)
7 {
8 label lbl = sender as label;
9 if (lbl.tag != null)
10 {
11 var menu = (navigationmenuitem)lbl.tag;
12 if (menu.items == null || menu.items.length <= 0)
13 {
14 selectitem = menu;
15
16 while (m_lstanchors.count > 0)
17 {
18 try
19 {
20 foreach (var item in m_lstanchors)
21 {
22 item.value.close();
23 m_lstanchors.remove(item.key);
24 }
25 }
26 catch { }
27 }
28
29 if (clickitemed != null)
30 {
31 clickitemed(this, e);
32 }
33 }
34 else
35 {
36 closelist(menu);
37 if (m_lstanchors.containskey(menu))
38 {
39 if (m_lstanchors[menu] != null && !m_lstanchors[menu].isdisposed)
40 {
41 m_lstanchors[menu].close();
42 }
43 m_lstanchors.remove(menu);
44 }
45 showmoremenu(lbl);
46 }
47 }
48 }
49
50 /// <summary>
51 /// handles the mouseenter event of the lbl control.
52 /// </summary>
53 /// <param name="sender">the source of the event.</param>
54 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
55 void lbl_mouseenter(object sender, eventargs e)
56 {
57 label lbl = sender as label;
58 showmoremenu(lbl);
59 }
60 /// <summary>
61 /// handles the formclosing event of the ucnavigationmenu control.
62 /// </summary>
63 /// <param name="sender">the source of the event.</param>
64 /// <param name="e">the <see cref="formclosingeventargs"/> instance containing the event data.</param>
65 void ucnavigationmenu_formclosing(object sender, formclosingeventargs e)
66 {
67 frmanchor frm = sender as frmanchor;
68 if (m_lstanchors.containsvalue(frm))
69 {
70 foreach (var item in m_lstanchors)
71 {
72 if (item.value == frm)
73 {
74 m_lstanchors.remove(item.key);
75 return;
76 }
77 }
78 }
79 }
80
81 /// <summary>
82 /// handles the paint event of the panel control.
83 /// </summary>
84 /// <param name="sender">the source of the event.</param>
85 /// <param name="e">the <see cref="painteventargs"/> instance containing the event data.</param>
86 void panel_paint(object sender, painteventargs e)
87 {
88 e.graphics.setgdihigh();
89 rectangle rect = new rectangle(0, 0, e.cliprectangle.width - 1, e.cliprectangle.height - 1);
90 var path = rect.createroundedrectanglepath(2);
91 e.graphics.drawpath(new pen(new solidbrush(linecolors.light)), path);
92 }
93
94
95
96 /// <summary>
97 /// gets the size of the items.
98 /// </summary>
99 /// <param name="items">the items.</param>
100 /// <returns>size.</returns>
101 private size getitemssize(navigationmenuitem[] items)
102 {
103 size size = size.empty;
104 if (items != null && items.length > 0)
105 {
106 using (var g = this.creategraphics())
107 {
108 foreach (navigationmenuitem item in items)
109 {
110 var s = g.measurestring(item.text, font);
111 if (s.width + 25 > size.width)
112 {
113 size.width = (int)s.width + 25;
114 }
115 if (s.height + 10 > size.height)
116 {
117 size.height = (int)s.height + 10;
118 }
119 }
120 }
121 }
122 return size;
123 }
124
125
126 /// <summary>
127 /// handles the paint event of the lbl control.
128 /// </summary>
129 /// <param name="sender">the source of the event.</param>
130 /// <param name="e">the <see cref="painteventargs"/> instance containing the event data.</param>
131 void lbl_paint(object sender, painteventargs e)
132 {
133 label lbl = sender as label;
134 if (lbl.tag != null)
135 {
136 var menu = (navigationmenuitem)lbl.tag;
137 e.graphics.setgdihigh();
138 if (menu.parentitem == null)//顶级节点支持图标和角标
139 {
140 if (menu.showtip)
141 {
142 if (!string.isnullorempty(menu.tiptext))
143 {
144 var rect = new rectangle(lbl.width - 25, lbl.height / 2 - 10, 20, 20);
145 var path = rect.createroundedrectanglepath(5);
146 e.graphics.fillpath(new solidbrush(tipcolor), path);
147 e.graphics.drawstring(menu.tiptext, new font("微软雅黑", 8f), new solidbrush(color.white), rect, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
148 }
149 else
150 {
151 e.graphics.fillellipse(new solidbrush(tipcolor), new rectangle(lbl.width - 20, lbl.height / 2 - 10, 10, 10));
152 }
153 }
154 if (menu.icon != null)
155 {
156 e.graphics.drawimage(menu.icon, new rectangle(1, (lbl.height - 25) / 2, 25, 25), 0, 0, menu.icon.width, menu.icon.height, graphicsunit.pixel);
157 }
158 }
159 if (menu.parentitem != null && menu.items != null && menu.items.length > 0)
160 {
161 controlhelper.painttriangle(e.graphics, new solidbrush(this.backcolor), new point(lbl.width - 11, (lbl.height - 5) / 2), 5, graphdirection.rightward);
162 }
163 }
164 }
完整代码
1 // ***********************************************************************
2 // assembly : hzh_controls
3 // created : 2019-10-08
4 //
5 // ***********************************************************************
6 // <copyright file="ucnavigationmenu.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.componentmodel;
19 using system.drawing;
20 using system.data;
21 using system.linq;
22 using system.text;
23 using system.windows.forms;
24 using hzh_controls.forms;
25
26 namespace hzh_controls.controls
27 {
28 /// <summary>
29 /// class ucnavigationmenu.
30 /// implements the <see cref="system.windows.forms.usercontrol" />
31 /// </summary>
32 /// <seealso cref="system.windows.forms.usercontrol" />
33 [defaultevent("clickitemed")]
34 public partial class ucnavigationmenu : usercontrol
35 {
36 /// <summary>
37 /// occurs when [click itemed].
38 /// </summary>
39 [description("点击节点事件"), category("自定义")]
40
41 public event eventhandler clickitemed;
42 /// <summary>
43 /// the select item
44 /// </summary>
45 private navigationmenuitem selectitem = null;
46
47 /// <summary>
48 /// gets the select item.
49 /// </summary>
50 /// <value>the select item.</value>
51 [description("选中的节点"), category("自定义")]
52 public navigationmenuitem selectitem
53 {
54 get { return selectitem; }
55 private set { selectitem = value; }
56 }
57
58
59 /// <summary>
60 /// the items
61 /// </summary>
62 navigationmenuitem[] items;
63
64 /// <summary>
65 /// gets or sets the items.
66 /// </summary>
67 /// <value>the items.</value>
68 [description("节点列表"), category("自定义")]
69 public navigationmenuitem[] items
70 {
71 get { return items; }
72 set
73 {
74 items = value;
75 reloadmenu();
76 }
77 }
78
79 /// <summary>
80 /// the tip color
81 /// </summary>
82 private color tipcolor = color.fromargb(255, 87, 34);
83
84 /// <summary>
85 /// gets or sets the color of the tip.
86 /// </summary>
87 /// <value>the color of the tip.</value>
88 [description("角标颜色"), category("自定义")]
89 public color tipcolor
90 {
91 get { return tipcolor; }
92 set { tipcolor = value; }
93 }
94
95 /// <summary>
96 /// 获取或设置控件的前景色。
97 /// </summary>
98 /// <value>the color of the fore.</value>
99 /// <permissionset>
100 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
101 /// </permissionset>
102 public override system.drawing.color forecolor
103 {
104 get
105 {
106 return base.forecolor;
107 }
108 set
109 {
110 base.forecolor = value;
111 foreach (control c in this.controls)
112 {
113 c.forecolor = value;
114 }
115 }
116 }
117 /// <summary>
118 /// 获取或设置控件显示的文字的字体。
119 /// </summary>
120 /// <value>the font.</value>
121 /// <permissionset>
122 /// <ipermission class="system.security.permissions.environmentpermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
123 /// <ipermission class="system.security.permissions.fileiopermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
124 /// <ipermission class="system.security.permissions.securitypermission, mscorlib, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" flags="unmanagedcode, controlevidence" />
125 /// <ipermission class="system.diagnostics.performancecounterpermission, system, version=2.0.3600.0, culture=neutral, publickeytoken=b77a5c561934e089" version="1" unrestricted="true" />
126 /// </permissionset>
127 public override font font
128 {
129 get
130 {
131 return base.font;
132 }
133 set
134 {
135 base.font = value;
136 foreach (control c in this.controls)
137 {
138 c.font = value;
139 }
140 }
141 }
142
143 /// <summary>
144 /// the m lst anchors
145 /// </summary>
146 dictionary<navigationmenuitem, frmanchor> m_lstanchors = new dictionary<navigationmenuitem, frmanchor>();
147
148 /// <summary>
149 /// initializes a new instance of the <see cref="ucnavigationmenu"/> class.
150 /// </summary>
151 public ucnavigationmenu()
152 {
153 initializecomponent();
154 items = new navigationmenuitem[0];
155 if (controlhelper.isdesignmode())
156 {
157 items = new navigationmenuitem[4];
158 for (int i = 0; i < 4; i++)
159 {
160 items[i] = new navigationmenuitem()
161 {
162 text = "菜单" + (i + 1),
163 anchorright = i >= 2
164 };
165 }
166 }
167 }
168
169 /// <summary>
170 /// reloads the menu.
171 /// </summary>
172 private void reloadmenu()
173 {
174 try
175 {
176 controlhelper.freezecontrol(this, true);
177 this.controls.clear();
178 if (items != null && items.length > 0)
179 {
180 foreach (var item in items)
181 {
182 var menu = (navigationmenuitem)item;
183 label lbl = new label();
184 lbl.autosize = false;
185 lbl.textalign = contentalignment.middlecenter;
186 lbl.width = menu.itemwidth;
187 lbl.text = menu.text;
188
189 lbl.font = font;
190 lbl.forecolor = forecolor;
191
192 lbl.paint += lbl_paint;
193 lbl.mouseenter += lbl_mouseenter;
194 lbl.tag = menu;
195 lbl.click += lbl_click;
196 if (menu.anchorright)
197 {
198 lbl.dock = dockstyle.right;
199 }
200 else
201 {
202 lbl.dock = dockstyle.left;
203 }
204 this.controls.add(lbl);
205
206 lbl.bringtofront();
207 }
208
209
210 }
211 }
212 finally
213 {
214 controlhelper.freezecontrol(this, false);
215 }
216 }
217
218
219
220 /// <summary>
221 /// handles the click event of the lbl control.
222 /// </summary>
223 /// <param name="sender">the source of the event.</param>
224 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
225 void lbl_click(object sender, eventargs e)
226 {
227 label lbl = sender as label;
228 if (lbl.tag != null)
229 {
230 var menu = (navigationmenuitem)lbl.tag;
231 if (menu.items == null || menu.items.length <= 0)
232 {
233 selectitem = menu;
234
235 while (m_lstanchors.count > 0)
236 {
237 try
238 {
239 foreach (var item in m_lstanchors)
240 {
241 item.value.close();
242 m_lstanchors.remove(item.key);
243 }
244 }
245 catch { }
246 }
247
248 if (clickitemed != null)
249 {
250 clickitemed(this, e);
251 }
252 }
253 else
254 {
255 closelist(menu);
256 if (m_lstanchors.containskey(menu))
257 {
258 if (m_lstanchors[menu] != null && !m_lstanchors[menu].isdisposed)
259 {
260 m_lstanchors[menu].close();
261 }
262 m_lstanchors.remove(menu);
263 }
264 showmoremenu(lbl);
265 }
266 }
267 }
268
269 /// <summary>
270 /// handles the mouseenter event of the lbl control.
271 /// </summary>
272 /// <param name="sender">the source of the event.</param>
273 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
274 void lbl_mouseenter(object sender, eventargs e)
275 {
276 label lbl = sender as label;
277 showmoremenu(lbl);
278 }
279
280 /// <summary>
281 /// checks the show.
282 /// </summary>
283 /// <param name="menu">the menu.</param>
284 /// <returns><c>true</c> if xxxx, <c>false</c> otherwise.</returns>
285 private bool checkshow(navigationmenuitem menu)
286 {
287 //检查已经打开的节点
288 if (m_lstanchors.containskey(menu))
289 {
290 closelist(menu);
291 return false;
292 }
293 if (hasincachechild(menu))
294 {
295 if (m_lstanchors.containskey(menu.parentitem))
296 {
297 closelist(menu.parentitem);
298 return true;
299 }
300 return false;
301 }
302 else
303 {
304 for (int i = 0; i < 1; )
305 {
306 try
307 {
308 foreach (var item in m_lstanchors)
309 {
310 if (m_lstanchors[item.key] != null && !m_lstanchors[item.key].isdisposed)
311 {
312 m_lstanchors[item.key].close();
313 }
314 }
315 }
316 catch
317 {
318 continue;
319 }
320 i++;
321 }
322 m_lstanchors.clear();
323 return true;
324 }
325 }
326
327 /// <summary>
328 /// determines whether [has in cache child] [the specified menu].
329 /// </summary>
330 /// <param name="menu">the menu.</param>
331 /// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>
332 private bool hasincachechild(navigationmenuitem menu)
333 {
334 foreach (var item in m_lstanchors)
335 {
336 if (item.key == menu)
337 {
338 return true;
339 }
340 else
341 {
342 if (item.key.items != null)
343 {
344 if (item.key.items.contains(menu))
345 return true;
346 }
347 }
348 }
349 return false;
350 }
351
352 /// <summary>
353 /// closes the list.
354 /// </summary>
355 /// <param name="menu">the menu.</param>
356 private void closelist(navigationmenuitem menu)
357 {
358 if (menu.items != null)
359 {
360 foreach (var item in menu.items)
361 {
362 closelist(item);
363 if (m_lstanchors.containskey(item))
364 {
365 if (m_lstanchors[item] != null && !m_lstanchors[item].isdisposed)
366 {
367 m_lstanchors[item].close();
368 m_lstanchors[item] = null;
369 m_lstanchors.remove(item);
370 }
371 }
372 }
373 }
374 }
375
376 /// <summary>
377 /// shows the more menu.
378 /// </summary>
379 /// <param name="lbl">the label.</param>
380 private void showmoremenu(label lbl)
381 {
382 var menu = (navigationmenuitem)lbl.tag;
383 if (checkshow(menu))
384 {
385 if (menu.items != null && menu.items.length > 0)
386 {
387 panel panel = new panel();
388 panel.backcolor = color.white;
389 panel.paint += panel_paint;
390 panel.padding = new system.windows.forms.padding(1);
391 size size = getitemssize(menu.items);
392 var height = size.height * menu.items.length + 2;
393 height += menu.items.count(p => p.hassplitlintattop);//分割线
394 if (size.width < lbl.width)
395 size.width = lbl.width;
396 panel.size = new size(size.width, height);
397
398 foreach (var item in menu.items)
399 {
400 if (item.hassplitlintattop)
401 {
402 ucsplitline_h line = new ucsplitline_h();
403 line.dock = dockstyle.top;
404 panel.controls.add(line);
405 line.bringtofront();
406 }
407 label _lbl = new label();
408 _lbl.font = font;
409 _lbl.forecolor = this.backcolor;
410 _lbl.autosize = false;
411 _lbl.textalign = contentalignment.middlecenter;
412 _lbl.height = size.height;
413 _lbl.text = item.text;
414 _lbl.dock = dockstyle.top;
415 _lbl.bringtofront();
416 _lbl.paint += lbl_paint;
417 _lbl.mouseenter += lbl_mouseenter;
418 _lbl.tag = item;
419 _lbl.click += lbl_click;
420 _lbl.size = new system.drawing.size(size.width, size.height);
421 panel.controls.add(_lbl);
422 _lbl.bringtofront();
423 }
424 point point = point.empty;
425
426 if (menu.parentitem != null)
427 {
428 point p = lbl.parent.pointtoscreen(lbl.location);
429 if (p.x + lbl.width + panel.width > screen.primaryscreen.bounds.width)
430 {
431 point = new point(-1 * panel.width - 2, -1 * lbl.height);
432 }
433 else
434 {
435 point = new point(panel.width + 2, -1 * lbl.height);
436 }
437 }
438 m_lstanchors[menu] = new frmanchor(lbl, panel, point);
439 m_lstanchors[menu].formclosing += ucnavigationmenu_formclosing;
440 m_lstanchors[menu].show();
441 m_lstanchors[menu].size = new size(size.width, height);
442 }
443 }
444
445 }
446
447 /// <summary>
448 /// handles the formclosing event of the ucnavigationmenu control.
449 /// </summary>
450 /// <param name="sender">the source of the event.</param>
451 /// <param name="e">the <see cref="formclosingeventargs"/> instance containing the event data.</param>
452 void ucnavigationmenu_formclosing(object sender, formclosingeventargs e)
453 {
454 frmanchor frm = sender as frmanchor;
455 if (m_lstanchors.containsvalue(frm))
456 {
457 foreach (var item in m_lstanchors)
458 {
459 if (item.value == frm)
460 {
461 m_lstanchors.remove(item.key);
462 return;
463 }
464 }
465 }
466 }
467
468 /// <summary>
469 /// handles the paint event of the panel control.
470 /// </summary>
471 /// <param name="sender">the source of the event.</param>
472 /// <param name="e">the <see cref="painteventargs"/> instance containing the event data.</param>
473 void panel_paint(object sender, painteventargs e)
474 {
475 e.graphics.setgdihigh();
476 rectangle rect = new rectangle(0, 0, e.cliprectangle.width - 1, e.cliprectangle.height - 1);
477 var path = rect.createroundedrectanglepath(2);
478 e.graphics.drawpath(new pen(new solidbrush(linecolors.light)), path);
479 }
480
481
482
483 /// <summary>
484 /// gets the size of the items.
485 /// </summary>
486 /// <param name="items">the items.</param>
487 /// <returns>size.</returns>
488 private size getitemssize(navigationmenuitem[] items)
489 {
490 size size = size.empty;
491 if (items != null && items.length > 0)
492 {
493 using (var g = this.creategraphics())
494 {
495 foreach (navigationmenuitem item in items)
496 {
497 var s = g.measurestring(item.text, font);
498 if (s.width + 25 > size.width)
499 {
500 size.width = (int)s.width + 25;
501 }
502 if (s.height + 10 > size.height)
503 {
504 size.height = (int)s.height + 10;
505 }
506 }
507 }
508 }
509 return size;
510 }
511
512
513 /// <summary>
514 /// handles the paint event of the lbl control.
515 /// </summary>
516 /// <param name="sender">the source of the event.</param>
517 /// <param name="e">the <see cref="painteventargs"/> instance containing the event data.</param>
518 void lbl_paint(object sender, painteventargs e)
519 {
520 label lbl = sender as label;
521 if (lbl.tag != null)
522 {
523 var menu = (navigationmenuitem)lbl.tag;
524 e.graphics.setgdihigh();
525 if (menu.parentitem == null)//顶级节点支持图标和角标
526 {
527 if (menu.showtip)
528 {
529 if (!string.isnullorempty(menu.tiptext))
530 {
531 var rect = new rectangle(lbl.width - 25, lbl.height / 2 - 10, 20, 20);
532 var path = rect.createroundedrectanglepath(5);
533 e.graphics.fillpath(new solidbrush(tipcolor), path);
534 e.graphics.drawstring(menu.tiptext, new font("微软雅黑", 8f), new solidbrush(color.white), rect, new stringformat() { alignment = stringalignment.center, linealignment = stringalignment.center });
535 }
536 else
537 {
538 e.graphics.fillellipse(new solidbrush(tipcolor), new rectangle(lbl.width - 20, lbl.height / 2 - 10, 10, 10));
539 }
540 }
541 if (menu.icon != null)
542 {
543 e.graphics.drawimage(menu.icon, new rectangle(1, (lbl.height - 25) / 2, 25, 25), 0, 0, menu.icon.width, menu.icon.height, graphicsunit.pixel);
544 }
545 }
546 if (menu.parentitem != null && menu.items != null && menu.items.length > 0)
547 {
548 controlhelper.painttriangle(e.graphics, new solidbrush(this.backcolor), new point(lbl.width - 11, (lbl.height - 5) / 2), 5, graphdirection.rightward);
549 }
550 }
551 }
552 }
553 }
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