C# WinForms：当父窗体最小化时，如何防止子窗体最小化？

Question

我正在创建一个 C# WinForms MDI 应用程序。 我有一个主窗体，其中包含其他 4 个 forms。 我希望能够将子 forms 移到父窗体之外（它们的 FormBorderStyle 值设置为相当大的工具栏，以便单独的 windows 不会出现在每个子窗口的任务栏上）。 我可以通过对主表单使用以下代码来完成此操作：

    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 Prototype
    {
       public partial class MdiParent : Form
       {
           private FastEyeControl m_ControlForm;
           private FastEyeLogWindow m_LogForm;
           private FastEyeConfiguration m_ConfigurationForm;
           private ROCOrderWindow m_OrderLogForm;

           public MdiParent()
           {
               InitializeComponent();

               m_ControlForm       = new FastEyeControl();
               m_LogForm           = new FastEyeLogWindow();
               m_ConfigurationForm = new FastEyeConfiguration();
               m_OrderLogForm      = new ROCOrderWindow();
           }

           private void MdiParent_Load(object sender, EventArgs e)
           {
               m_ControlForm.Show(this);
               m_LogForm.Show(this);
               m_ConfigurationForm.Show(this);
               m_OrderLogForm.Show(this);
           }
        }
    }

但是，当我最小化父表单时，所有子 forms 也会被最小化（如预期的那样）。 无论如何，当父 window 最小化时，是否有任何子 forms 被最小化？ 基本上，如果需要，我希望用户能够调整单个子 forms 的大小并将其移动到父窗体之外（例如取消停靠 Visual Studio.NET 中的工具栏并将其放置在另一个监视器中）。 谢谢你的帮助！

Answer 1

我认为您将不得不从拥有/父级/mdi windows 中移出，而必须将它们全部设为无主顶级 windows，彼此“平行”。 然后编写自己的逻辑，将一个 window 对接到另一个 window。

Answer 2

您实际上还没有创建 MDI 应用程序，也没有设置子窗体的 MdiParent 属性。 应该清晰可见，您可以将子窗体移动到主窗体的范围之外。

您通过使用 Show(owner) 重载让他们拥有 windows。 这意味着它们将始终位于主 window 之上。 当您最小化主 window 时，也会被最小化。

只需调用 Show() 方法（无参数）。

Answer 3

好的，我开始工作了：

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;
using System.Diagnostics;

namespace Prototype
{
    public partial class MdiParent : Form
    {
        private FastEyeControl m_ControlForm;
        private FastEyeLogWindow m_LogForm;
        private FastEyeConfiguration m_ConfigurationForm;
        private ROCOrderWindow m_OrderLogForm;

        private Point m_ControlFormLocation;
        private Point m_LogFormLocation;
        private Point m_ConfigurationFormLocation;
        private Point m_OrderLogFormLocation;

        public MdiParent()
        {
            InitializeComponent();

            m_ControlForm       = new FastEyeControl();
            m_LogForm           = new FastEyeLogWindow();
            m_ConfigurationForm = new FastEyeConfiguration();
            m_OrderLogForm      = new ROCOrderWindow();

            m_ControlFormLocation = new Point(0, 25);
            m_LogFormLocation = new Point(0, 405);
            m_ConfigurationFormLocation = new Point(550, 25);
            m_OrderLogFormLocation = new Point(0, 630);
        }

        private void MdiParent_Load(object sender, EventArgs e)
        {
            DockForm(m_ControlForm, m_ControlFormLocation);
            DockForm(m_LogForm, m_LogFormLocation);
            DockForm(m_ConfigurationForm, m_ConfigurationFormLocation);
            DockForm(m_OrderLogForm, m_OrderLogFormLocation);
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void DockForm(Form form, Point location)
        {
            form.TopLevel = false;
            form.Location = location;

            if (! this.Controls.Contains(form))
            {
                this.Controls.Add(form);
            }

            form.Visible = true;
        }

        private void UndockForm(Form form)
        {
            if (this.Controls.Contains(form))
            {
                this.Controls.Remove(form);
            }

            form.TopLevel = true;
            form.Visible = true;
        }

        private void DockOrUndockForm(Form form, Point location)
        {
            if (this.Controls.Contains(form))
            {
                UndockForm(form);
            }
            else
            {
                DockForm(form, location);
            }
        }

        private void ToggleDockingOrDockForm(Form form, Point location)
        {
            if (form.Visible)
            {
                DockOrUndockForm(form, location);
            }
            else
            {
                DockForm(form, location);
            }
        }

        private void fastEyeControlToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToggleDockingOrDockForm(m_ControlForm, m_ControlFormLocation);
        }

        private void fastEyeLogToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToggleDockingOrDockForm(m_LogForm, m_LogFormLocation);
        }

        private void fastEyeConfigurationToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToggleDockingOrDockForm(m_ConfigurationForm, m_ConfigurationFormLocation);
        }

        private void rOCOrderLogToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToggleDockingOrDockForm(m_OrderLogForm, m_OrderLogFormLocation);
        }
    }
}

这段代码安全吗？