（十九）c#Winform自定义控件-停靠窗体
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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
如果觉得写的还行，请点个 star 支持一下吧
欢迎前来交流探讨： 企鹅群568015492 idkey=6e08741ef16fe53bf0314c1c9e336c4f626047943a8b76bac062361bab6b4f8d">
目录
https://www.cnblogs.com/bfyx/p/11364884.html
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
#region 构造函数
/// <summary>
/// 功能描述:构造函数
/// 作 者:HZH
/// 创建日期:2019-02-27 11:49:08
/// 任务编号:POS
/// </summary>
/// <param name="parentControl">父控件</param>
/// <param name="childControl">子控件</param>
/// <param name="deviation">偏移</param>
public FrmAnchor(Control parentControl, Control childControl, Point? deviation = null)
{
m_parentControl = parentControl;
InitializeComponent();
this.Size = childControl.Size;
this.HandleCreated += FrmDownBoard_HandleCreated;
this.HandleDestroyed += FrmDownBoard_HandleDestroyed;
this.Controls.Add(childControl);
childControl.Dock = DockStyle.Fill;
Point p = parentControl.Parent.PointToScreen(parentControl.Location);
int intX = ;
int intY = ;
if (p.Y + parentControl.Height + childControl.Height > Screen.PrimaryScreen.Bounds.Height)
{
intY = p.Y - childControl.Height - ;
blnDown = false;
}
else
{
intY = p.Y + parentControl.Height + ;
blnDown = true;
} if (p.X + childControl.Width > Screen.PrimaryScreen.Bounds.Width)
{
intX = Screen.PrimaryScreen.Bounds.Width - childControl.Width; }
else
{
intX = p.X;
}
if (deviation.HasValue)
{
intX += deviation.Value.X;
intY += deviation.Value.Y;
}
this.Location = new Point(intX, intY);
} public FrmAnchor(Control parentControl, Size size, Point? deviation = null)
{
m_parentControl = parentControl;
InitializeComponent();
this.Size = size;
this.HandleCreated += FrmDownBoard_HandleCreated;
this.HandleDestroyed += FrmDownBoard_HandleDestroyed; Point p = parentControl.Parent.PointToScreen(parentControl.Location);
int intX = ;
int intY = ;
if (p.Y + parentControl.Height + size.Height > Screen.PrimaryScreen.Bounds.Height)
{
intY = p.Y - size.Height - ;
blnDown = false;
}
else
{
intY = p.Y + parentControl.Height + ;
blnDown = true;
} if (p.X + size.Width > Screen.PrimaryScreen.Bounds.Width)
{
intX = Screen.PrimaryScreen.Bounds.Width - size.Width; }
else
{
intX = p.X;
}
if (deviation.HasValue)
{
intX += deviation.Value.X;
intY += deviation.Value.Y;
}
this.Location = new Point(intX, intY);
} #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
#region 无焦点窗体
[System.Runtime.InteropServices.DllImport("user32.dll")]
private extern static IntPtr SetActiveWindow(IntPtr handle);
private const int WM_ACTIVATE = 0x006;
private const int WM_ACTIVATEAPP = 0x01C;
private const int WM_NCACTIVATE = 0x086;
private const int WA_INACTIVE = ;
private const int WM_MOUSEACTIVATE = 0x21;
private const int MA_NOACTIVATE = ;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_MOUSEACTIVATE)
{
m.Result = new IntPtr(MA_NOACTIVATE);
return;
}
else if (m.Msg == WM_NCACTIVATE)
{
if (((int)m.WParam & 0xFFFF) != WA_INACTIVE)
{
if (m.LParam != IntPtr.Zero)
{
SetActiveWindow(m.LParam);
}
else
{
SetActiveWindow(IntPtr.Zero);
}
}
}
base.WndProc(ref m);
}
#endregion
private void timer1_Tick(object sender, EventArgs e)
{
if (this.Owner != null)
{
Form frm = this.Owner as Form;
IntPtr _ptr = ControlHelper.GetForegroundWindow();
if (_ptr != frm.Handle)
{
this.Hide();
}
}
}
显示和关闭动画
private void FrmAnchor_VisibleChanged(object sender, EventArgs e)
{
timer1.Enabled = this.Visible;
if (Visible)
{
if (blnDown)
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_POSITIVE);
else
{
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_NEGATIVE);
}
}
else
{
if (blnDown)
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_NEGATIVE | ControlHelper.AW_HIDE);
else
{
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_POSITIVE | ControlHelper.AW_HIDE); }
}
}
再看一下完整代码
// 版权所有 黄正辉 交流群：568015492 QQ：623128629
// 文件名称：FrmAnchor.cs
// 创建日期：2019-08-15 16:04:24
// 功能描述：FrmAnchor
// 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms; namespace HZH_Controls.Forms
{
/// <summary>
/// 功能描述:停靠窗体
/// 作 者:HZH
/// 创建日期:2019-02-27 11:49:03
/// 任务编号:POS
/// </summary>
public partial class FrmAnchor : Form, IMessageFilter
{
Control m_parentControl = null;
private bool blnDown = true;
#region 构造函数
/// <summary>
/// 功能描述:构造函数
/// 作 者:HZH
/// 创建日期:2019-02-27 11:49:08
/// 任务编号:POS
/// </summary>
/// <param name="parentControl">父控件</param>
/// <param name="childControl">子控件</param>
/// <param name="deviation">偏移</param>
public FrmAnchor(Control parentControl, Control childControl, Point? deviation = null)
{
m_parentControl = parentControl;
InitializeComponent();
this.Size = childControl.Size;
this.HandleCreated += FrmDownBoard_HandleCreated;
this.HandleDestroyed += FrmDownBoard_HandleDestroyed;
this.Controls.Add(childControl);
childControl.Dock = DockStyle.Fill;
Point p = parentControl.Parent.PointToScreen(parentControl.Location);
int intX = ;
int intY = ;
if (p.Y + parentControl.Height + childControl.Height > Screen.PrimaryScreen.Bounds.Height)
{
intY = p.Y - childControl.Height - ;
blnDown = false;
}
else
{
intY = p.Y + parentControl.Height + ;
blnDown = true;
} if (p.X + childControl.Width > Screen.PrimaryScreen.Bounds.Width)
{
intX = Screen.PrimaryScreen.Bounds.Width - childControl.Width; }
else
{
intX = p.X;
}
if (deviation.HasValue)
{
intX += deviation.Value.X;
intY += deviation.Value.Y;
}
this.Location = new Point(intX, intY);
} public FrmAnchor(Control parentControl, Size size, Point? deviation = null)
{
m_parentControl = parentControl;
InitializeComponent();
this.Size = size;
this.HandleCreated += FrmDownBoard_HandleCreated;
this.HandleDestroyed += FrmDownBoard_HandleDestroyed; Point p = parentControl.Parent.PointToScreen(parentControl.Location);
int intX = ;
int intY = ;
if (p.Y + parentControl.Height + size.Height > Screen.PrimaryScreen.Bounds.Height)
{
intY = p.Y - size.Height - ;
blnDown = false;
}
else
{
intY = p.Y + parentControl.Height + ;
blnDown = true;
} if (p.X + size.Width > Screen.PrimaryScreen.Bounds.Width)
{
intX = Screen.PrimaryScreen.Bounds.Width - size.Width; }
else
{
intX = p.X;
}
if (deviation.HasValue)
{
intX += deviation.Value.X;
intY += deviation.Value.Y;
}
this.Location = new Point(intX, intY);
} #endregion private void FrmDownBoard_HandleDestroyed(object sender, EventArgs e)
{
Application.RemoveMessageFilter(this);
} private void FrmDownBoard_HandleCreated(object sender, EventArgs e)
{
Application.AddMessageFilter(this);
} #region 无焦点窗体 [System.Runtime.InteropServices.DllImport("user32.dll")]
private extern static IntPtr SetActiveWindow(IntPtr handle);
private const int WM_ACTIVATE = 0x006;
private const int WM_ACTIVATEAPP = 0x01C;
private const int WM_NCACTIVATE = 0x086;
private const int WA_INACTIVE = ;
private const int WM_MOUSEACTIVATE = 0x21;
private const int MA_NOACTIVATE = ;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_MOUSEACTIVATE)
{
m.Result = new IntPtr(MA_NOACTIVATE);
return;
}
else if (m.Msg == WM_NCACTIVATE)
{
if (((int)m.WParam & 0xFFFF) != WA_INACTIVE)
{
if (m.LParam != IntPtr.Zero)
{
SetActiveWindow(m.LParam);
}
else
{
SetActiveWindow(IntPtr.Zero);
}
}
}
base.WndProc(ref m);
} #endregion 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;
} private void FrmAnchor_Load(object sender, EventArgs e)
{ } private void FrmAnchor_VisibleChanged(object sender, EventArgs e)
{
timer1.Enabled = this.Visible;
if (Visible)
{
if (blnDown)
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_POSITIVE);
else
{
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_NEGATIVE);
}
}
else
{
if (blnDown)
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_NEGATIVE | ControlHelper.AW_HIDE);
else
{
ControlHelper.AnimateWindow(this.Handle, , ControlHelper.AW_VER_POSITIVE | ControlHelper.AW_HIDE); }
}
} private void timer1_Tick(object sender, EventArgs e)
{
if (this.Owner != null)
{
Form frm = this.Owner as Form;
IntPtr _ptr = ControlHelper.GetForegroundWindow();
if (_ptr != frm.Handle)
{
this.Hide();
}
}
} }
}
namespace HZH_Controls.Forms
{
partial class FrmAnchor
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region Windows Form Designer generated code /// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(FrmAnchor));
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// timer1
//
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// FrmAnchor
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.ClientSize = new System.Drawing.Size(, );
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.Name = "FrmAnchor";
this.ShowIcon = false;
this.ShowInTaskbar = false;
this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
this.Text = "FrmAnchor";
this.TopMost = true;
this.Load += new System.EventHandler(this.FrmAnchor_Load);
this.VisibleChanged += new System.EventHandler(this.FrmAnchor_VisibleChanged);
this.ResumeLayout(false); } #endregion private System.Windows.Forms.Timer timer1;
}
}
用处及效果
用处：弹出菜单，文本框弹出键盘等
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
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