（十九）c#Winform自定义控件-停靠窗体

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。

开源地址：

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目录

准备工作

这是一个可停靠在指定位置或停靠在某个控件旁边的无焦点窗体，市区焦点会关闭

开始

添加一个form，命名为frmanchor，实现接口imessagefilter

有2个构造函数

 1    #region 构造函数
 2         /// <summary>
 3         /// 功能描述:构造函数
 4         /// 作　　者:hzh
 5         /// 创建日期:2019-02-27 11:49:08
 6         /// 任务编号:pos
 7         /// </summary>
 8         /// <param name="parentcontrol">父控件</param>
 9         /// <param name="childcontrol">子控件</param>
10         /// <param name="deviation">偏移</param>
11         public frmanchor(control parentcontrol, control childcontrol, point? deviation = null)
12         {
13             m_parentcontrol = parentcontrol;
14             initializecomponent();
15             this.size = childcontrol.size;
16             this.handlecreated += frmdownboard_handlecreated;
17             this.handledestroyed += frmdownboard_handledestroyed;
18             this.controls.add(childcontrol);
19             childcontrol.dock = dockstyle.fill;
20             point p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
21             int intx = 0;
22             int inty = 0;
23             if (p.y + parentcontrol.height + childcontrol.height > screen.primaryscreen.bounds.height)
24             {
25                 inty = p.y - childcontrol.height - 1;
26                 blndown = false;
27             }
28             else
29             {
30                 inty = p.y + parentcontrol.height + 1;
31                 blndown = true;
32             }
33 
34             if (p.x + childcontrol.width > screen.primaryscreen.bounds.width)
35             {
36                 intx = screen.primaryscreen.bounds.width - childcontrol.width;
37 
38             }
39             else
40             {
41                 intx = p.x;
42             }
43             if (deviation.hasvalue)
44             {
45                 intx += deviation.value.x;
46                 inty += deviation.value.y;
47             }
48             this.location = new point(intx, inty);
49         }
50 
51         public frmanchor(control parentcontrol, size size, point? deviation = null)
52         {
53             m_parentcontrol = parentcontrol;
54             initializecomponent();
55             this.size = size;
56             this.handlecreated += frmdownboard_handlecreated;
57             this.handledestroyed += frmdownboard_handledestroyed;
58 
59             point p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
60             int intx = 0;
61             int inty = 0;
62             if (p.y + parentcontrol.height + size.height > screen.primaryscreen.bounds.height)
63             {
64                 inty = p.y - size.height - 1;
65                 blndown = false;
66             }
67             else
68             {
69                 inty = p.y + parentcontrol.height + 1;
70                 blndown = true;
71             }
72 
73             if (p.x + size.width > screen.primaryscreen.bounds.width)
74             {
75                 intx = screen.primaryscreen.bounds.width - size.width;
76 
77             }
78             else
79             {
80                 intx = p.x;
81             }
82             if (deviation.hasvalue)
83             {
84                 intx += deviation.value.x;
85                 inty += deviation.value.y;
86             }
87             this.location = new point(intx, inty);
88         }
89 
90         #endregion

消息筛选器处理一下

private void frmdownboard_handledestroyed(object sender, eventargs e)
        {
            application.removemessagefilter(this);
        }

        private void frmdownboard_handlecreated(object sender, eventargs e)
        {
            application.addmessagefilter(this);
        }

 public bool prefiltermessage(ref message m)
        {
            if (m.msg != 0x0201 || this.visible == false)
                return false;
            var pt = this.pointtoclient(mouseposition);
            this.visible = this.clientrectangle.contains(pt);
            return false;
        }

无焦点处理

 1   #region 无焦点窗体
 2 
 3         [system.runtime.interopservices.dllimport("user32.dll")]
 4         private extern static intptr setactivewindow(intptr handle);
 5         private const int wm_activate = 0x006;
 6         private const int wm_activateapp = 0x01c;
 7         private const int wm_ncactivate = 0x086;
 8         private const int wa_inactive = 0;
 9         private const int wm_mouseactivate = 0x21;
10         private const int ma_noactivate = 3;
11         protected override void wndproc(ref message m)
12         {
13             if (m.msg == wm_mouseactivate)
14             {
15                 m.result = new intptr(ma_noactivate);
16                 return;
17             }
18             else if (m.msg == wm_ncactivate)
19             {
20                 if (((int)m.wparam & 0xffff) != wa_inactive)
21                 {
22                     if (m.lparam != intptr.zero)
23                     {
24                         setactivewindow(m.lparam);
25                     }
26                     else
27                     {
28                         setactivewindow(intptr.zero);
29                     }
30                 }
31             }
32             base.wndproc(ref m);
33         }
34 
35         #endregion

 1    private void timer1_tick(object sender, eventargs e)
 2         {
 3             if (this.owner != null)
 4             {
 5                 form frm = this.owner as form;
 6                 intptr _ptr = controlhelper.getforegroundwindow();
 7                 if (_ptr != frm.handle)
 8                 {
 9                     this.hide();
10                 }
11             }
12         }

显示和关闭动画

 1 private void frmanchor_visiblechanged(object sender, eventargs e)
 2         {
 3             timer1.enabled = this.visible;
 4             if (visible)
 5             {
 6                 if (blndown)
 7                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_positive);
 8                 else
 9                 {
10                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_negative);
11                 }
12             }
13             else
14             {
15                 if (blndown)
16                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_negative | controlhelper.aw_hide);
17                 else
18                 {
19                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_positive | controlhelper.aw_hide);
20 
21                 }
22             }
23         }

再看一下完整代码

  1 // 版权所有  黄正辉  交流群：568015492   qq：623128629
  2 // 文件名称：frmanchor.cs
  3 // 创建日期：2019-08-15 16:04:24
  4 // 功能描述：frmanchor
  5 // 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
  6 
  7 using system;
  8 using system.collections.generic;
  9 using system.componentmodel;
 10 using system.data;
 11 using system.drawing;
 12 using system.linq;
 13 using system.text;
 14 using system.windows.forms;
 15 
 16 namespace hzh_controls.forms
 17 {
 18     /// <summary>
 19     /// 功能描述:停靠窗体
 20     /// 作　　者:hzh
 21     /// 创建日期:2019-02-27 11:49:03
 22     /// 任务编号:pos
 23     /// </summary>
 24     public partial class frmanchor : form, imessagefilter
 25     {
 26         control m_parentcontrol = null;
 27         private bool blndown = true;
 28         #region 构造函数
 29         /// <summary>
 30         /// 功能描述:构造函数
 31         /// 作　　者:hzh
 32         /// 创建日期:2019-02-27 11:49:08
 33         /// 任务编号:pos
 34         /// </summary>
 35         /// <param name="parentcontrol">父控件</param>
 36         /// <param name="childcontrol">子控件</param>
 37         /// <param name="deviation">偏移</param>
 38         public frmanchor(control parentcontrol, control childcontrol, point? deviation = null)
 39         {
 40             m_parentcontrol = parentcontrol;
 41             initializecomponent();
 42             this.size = childcontrol.size;
 43             this.handlecreated += frmdownboard_handlecreated;
 44             this.handledestroyed += frmdownboard_handledestroyed;
 45             this.controls.add(childcontrol);
 46             childcontrol.dock = dockstyle.fill;
 47             point p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
 48             int intx = 0;
 49             int inty = 0;
 50             if (p.y + parentcontrol.height + childcontrol.height > screen.primaryscreen.bounds.height)
 51             {
 52                 inty = p.y - childcontrol.height - 1;
 53                 blndown = false;
 54             }
 55             else
 56             {
 57                 inty = p.y + parentcontrol.height + 1;
 58                 blndown = true;
 59             }
 60 
 61             if (p.x + childcontrol.width > screen.primaryscreen.bounds.width)
 62             {
 63                 intx = screen.primaryscreen.bounds.width - childcontrol.width;
 64 
 65             }
 66             else
 67             {
 68                 intx = p.x;
 69             }
 70             if (deviation.hasvalue)
 71             {
 72                 intx += deviation.value.x;
 73                 inty += deviation.value.y;
 74             }
 75             this.location = new point(intx, inty);
 76         }
 77 
 78         public frmanchor(control parentcontrol, size size, point? deviation = null)
 79         {
 80             m_parentcontrol = parentcontrol;
 81             initializecomponent();
 82             this.size = size;
 83             this.handlecreated += frmdownboard_handlecreated;
 84             this.handledestroyed += frmdownboard_handledestroyed;
 85 
 86             point p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
 87             int intx = 0;
 88             int inty = 0;
 89             if (p.y + parentcontrol.height + size.height > screen.primaryscreen.bounds.height)
 90             {
 91                 inty = p.y - size.height - 1;
 92                 blndown = false;
 93             }
 94             else
 95             {
 96                 inty = p.y + parentcontrol.height + 1;
 97                 blndown = true;
 98             }
 99 
100             if (p.x + size.width > screen.primaryscreen.bounds.width)
101             {
102                 intx = screen.primaryscreen.bounds.width - size.width;
103 
104             }
105             else
106             {
107                 intx = p.x;
108             }
109             if (deviation.hasvalue)
110             {
111                 intx += deviation.value.x;
112                 inty += deviation.value.y;
113             }
114             this.location = new point(intx, inty);
115         }
116 
117         #endregion
118 
119         private void frmdownboard_handledestroyed(object sender, eventargs e)
120         {
121             application.removemessagefilter(this);
122         }
123 
124         private void frmdownboard_handlecreated(object sender, eventargs e)
125         {
126             application.addmessagefilter(this);
127         }
128 
129         #region 无焦点窗体
130 
131         [system.runtime.interopservices.dllimport("user32.dll")]
132         private extern static intptr setactivewindow(intptr handle);
133         private const int wm_activate = 0x006;
134         private const int wm_activateapp = 0x01c;
135         private const int wm_ncactivate = 0x086;
136         private const int wa_inactive = 0;
137         private const int wm_mouseactivate = 0x21;
138         private const int ma_noactivate = 3;
139         protected override void wndproc(ref message m)
140         {
141             if (m.msg == wm_mouseactivate)
142             {
143                 m.result = new intptr(ma_noactivate);
144                 return;
145             }
146             else if (m.msg == wm_ncactivate)
147             {
148                 if (((int)m.wparam & 0xffff) != wa_inactive)
149                 {
150                     if (m.lparam != intptr.zero)
151                     {
152                         setactivewindow(m.lparam);
153                     }
154                     else
155                     {
156                         setactivewindow(intptr.zero);
157                     }
158                 }
159             }
160             base.wndproc(ref m);
161         }
162 
163         #endregion
164 
165         public bool prefiltermessage(ref message m)
166         {
167             if (m.msg != 0x0201 || this.visible == false)
168                 return false;
169             var pt = this.pointtoclient(mouseposition);
170             this.visible = this.clientrectangle.contains(pt);
171             return false;
172         }
173 
174         private void frmanchor_load(object sender, eventargs e)
175         {
176 
177         }
178 
179 
180         private void frmanchor_visiblechanged(object sender, eventargs e)
181         {
182             timer1.enabled = this.visible;
183             if (visible)
184             {
185                 if (blndown)
186                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_positive);
187                 else
188                 {
189                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_negative);
190                 }
191             }
192             else
193             {
194                 if (blndown)
195                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_negative | controlhelper.aw_hide);
196                 else
197                 {
198                     controlhelper.animatewindow(this.handle, 100, controlhelper.aw_ver_positive | controlhelper.aw_hide);
199 
200                 }
201             }
202         }
203 
204         private void timer1_tick(object sender, eventargs e)
205         {
206             if (this.owner != null)
207             {
208                 form frm = this.owner as form;
209                 intptr _ptr = controlhelper.getforegroundwindow();
210                 if (_ptr != frm.handle)
211                 {
212                     this.hide();
213                 }
214             }
215         }
216 
217     }
218 }

 1 namespace hzh_controls.forms
 2 {
 3     partial class frmanchor
 4     {
 5         /// <summary>
 6         /// required designer variable.
 7         /// </summary>
 8         private system.componentmodel.icontainer components = null;
 9 
10         /// <summary>
11         /// clean up any resources being used.
12         /// </summary>
13         /// <param name="disposing">true if managed resources should be disposed; otherwise, 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 windows form designer generated code
24 
25         /// <summary>
26         /// required method for designer support - do not modify
27         /// the contents of this method with the code editor.
28         /// </summary>
29         private void initializecomponent()
30         {
31             this.components = new system.componentmodel.container();
32             system.componentmodel.componentresourcemanager resources = new system.componentmodel.componentresourcemanager(typeof(frmanchor));
33             this.timer1 = new system.windows.forms.timer(this.components);
34             this.suspendlayout();
35             // 
36             // timer1
37             // 
38             this.timer1.tick += new system.eventhandler(this.timer1_tick);
39             // 
40             // frmanchor
41             // 
42             this.autoscalemode = system.windows.forms.autoscalemode.none;
43             this.clientsize = new system.drawing.size(45, 48);
44             this.formborderstyle = system.windows.forms.formborderstyle.none;
45             this.icon = ((system.drawing.icon)(resources.getobject("$this.icon")));
46             this.name = "frmanchor";
47             this.showicon = false;
48             this.showintaskbar = false;
49             this.startposition = system.windows.forms.formstartposition.manual;
50             this.text = "frmanchor";
51             this.topmost = true;
52             this.load += new system.eventhandler(this.frmanchor_load);
53             this.visiblechanged += new system.eventhandler(this.frmanchor_visiblechanged);
54             this.resumelayout(false);
55 
56         }
57 
58         #endregion
59 
60         private system.windows.forms.timer timer1;
61     }
62 }

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