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 }
用处及效果
用处：弹出菜单，文本框弹出键盘等
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