C# Form窗体的功能操作,无边框窗体的移动，无边框窗体的尺寸缩放,保存和恢复窗体的尺寸和坐标信息

/// 

/// 此类用于实现一些可用于Form窗体的功能操作
/// 
class FormTool
{

    //using System.Runtime.InteropServices;  
    [DllImport("user32.dll")]
    public static extern bool ReleaseCapture();
    [DllImport("user32.dll")]
    public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

    # region  无边框窗体的移动

    // 在Form的MouseDown(object sender, MouseEventArgs e)事件中调用此函数，可控制窗体移动
    public static void MouseDown_MoveForm(Form form)
    {
        //常量  
        int WM_SYSCOMMAND = 0x0112;

        //窗体移动  
        int SC_MOVE = 0xF010;
        int HTCAPTION = 0x0002;

        ReleaseCapture();
        SendMessage(form.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);

        saveFormInfo(form);        // 保存界面信息
    }

    # endregion


    # region  无边框窗体的尺寸缩放

    public static int formResizeMode = 0;       // 此处指定窗体尺寸修改的模式

    // 在Form的MouseDown(object sender, MouseEventArgs e)事件中调用此函数，可调整窗体大小
    public static void MouseDown_ResizeForm(Form form)
    {
        //常量
        int WM_SYSCOMMAND = 0x0112;

        ////改变窗体大小
        //int WMSZ_LEFT = 0xF001;
        //int WMSZ_RIGHT = 0xF002;
        //int WMSZ_TOP = 0xF003;
        //int WMSZ_TOPLEFT = 0xF004;
        //int WMSZ_TOPRIGHT = 0xF005;
        //int WMSZ_BOTTOM = 0xF006;
        //int WMSZ_BOTTOMLEFT = 0xF007;
        //int WMSZ_BOTTOMRIGHT = 0xF008;

        if (formResizeMode == 0) return;    // 若无缩放模式，则返回

        ReleaseCapture();
        SendMessage(form.Handle, WM_SYSCOMMAND, formResizeMode, 0);
        //SendMessage(form.Handle, WM_SYSCOMMAND, WMSZ_BOTTOM, 0);
        //SendMessage(this.Handle, WM_SYSCOMMAND, WMSZ_TOP, 0);
    }



    // 在处于最前端的控件的MouseMove事件中调用此函数，根据鼠标位置设置对应的缩放模式

    public static void MouseMove(object sender, MouseEventArgs e)
    {
        Control ctrl = (Control)sender;             // 获取鼠标处的控件
        Rectangle client = ctrl.ClientRectangle;    // 获取控件尺寸

        setSizeMode(client, new Point(e.X, e.Y), 10);   // 根据鼠标在区域client中的位置设置缩放模式
        //MessageBox.Show("鼠标坐标:" + e.X + "," + e.Y + " 窗体尺寸" + client.Width + "," + client.Height);
    }

    // 根据坐标 x,y 在rect上的位置控制尺寸调节模式
    private static void setSizeMode(Rectangle R, Point P, int W)
    {
        formResizeMode = getSizeMode(R, P, W);
    }

    // 根据坐标 x,y 在rect上的位置控制尺寸调节模式
    private static int getSizeMode(Rectangle R, Point P, int W)
    {
        //改变窗体大小相关参数
        int WMSZ_LEFT = 0xF001;
        int WMSZ_RIGHT = 0xF002;
        int WMSZ_TOP = 0xF003;
        int WMSZ_TOPLEFT = 0xF004;
        int WMSZ_TOPRIGHT = 0xF005;
        int WMSZ_BOTTOM = 0xF006;
        int WMSZ_BOTTOMLEFT = 0xF007;
        int WMSZ_BOTTOMRIGHT = 0xF008;

        // 中间区域
        Rectangle main = new Rectangle(R.Left + W, R.Top + W, R.Width - 2 * W, R.Height - 2 * W);
        if (main.Contains(P)) return 0;

        // 左侧区域
        Rectangle LeftRect = new Rectangle(R.Left + W, R.Top + W, W, R.Height - 2 * W);
        if (LeftRect.Contains(P)) return WMSZ_LEFT;

        // 右侧区域
        Rectangle RightRect = new Rectangle(R.Right - W, R.Top + W, W, R.Height - 2 * W);
        if (RightRect.Contains(P)) return WMSZ_RIGHT;

        // 顶部区域
        Rectangle TopRect = new Rectangle(R.Left + W, R.Top, R.Width - 2 * W, W);
        if (TopRect.Contains(P)) return WMSZ_TOP;

        // 底部区域
        Rectangle BottomRect = new Rectangle(R.Left + W, R.Bottom - W, R.Width - 2 * W, W);
        if (BottomRect.Contains(P)) return WMSZ_BOTTOM;

        // 左上区域
        Rectangle TOPLEFT = new Rectangle(R.Left, R.Top, W, W);
        if (TOPLEFT.Contains(P)) return WMSZ_TOPLEFT;

        // 右上区域
        Rectangle TOPRIGHT = new Rectangle(R.Right - W, R.Top, W, W);
        if (TOPRIGHT.Contains(P)) return WMSZ_TOPRIGHT;

        // 左下区域
        Rectangle BOTTOMLEFT = new Rectangle(R.Left, R.Bottom - W, W, W);
        if (BOTTOMLEFT.Contains(P)) return WMSZ_BOTTOMLEFT;

        // 右下区域
        Rectangle BOTTOMRIGHT = new Rectangle(R.Right - W, R.Bottom - W, W, W);
        if (BOTTOMRIGHT.Contains(P)) return WMSZ_BOTTOMRIGHT;

        return 0;
    }

    # endregion


    # region 保存和恢复窗体的尺寸和坐标信息

    // 保存窗体属性信息到注册表中
    public static void saveFormInfo(Form form)
    {
        if (form == null) return;

        String formKey = form.Text; // 获取窗体名称
        Point P = form.Location;    // 获取窗体form的坐标位置

        string formInfo = form.Width + "_" + form.Height + "_" + P.X + "_" + P.Y;

        // 保存窗体信息到注册表
        Tool.RegistrySave(@"Scimence\TaskManager\Set\FormInfo", formKey, formInfo);
    }

    // 从注册表中获取信息并设置窗体属性
    public static void RestoreFormInfo(Form form)
    {
        if (form == null) return;

        String formKey = form.Text; // 获取窗体名称

        // 获取信息
        string formInfo = Tool.RegistryStrValue(@"Scimence\TaskManager\Set\FormInfo", formKey);
        if (formInfo.Equals("")) saveFormInfo(form);
        else
        {
            string[] info = formInfo.Split('_');
            form.Width = Tool.toInt(info[0], form.Width);
            form.Height = Tool.toInt(info[1], form.Height);

            int x = Tool.toInt(info[2], form.Location.X);
            int y = Tool.toInt(info[3], form.Location.Y);
            form.Location = new Point(x, y);
        }
    }

    # endregion


    #region 控制窗体在桌面边缘区域的自动隐藏

    private static Dictionary DeactivateTimer = new Dictionary();
    private static Timer getTimer(String formKey)
    {
        Timer timer;
        if (DeactivateTimer.ContainsKey(formKey)) timer = DeactivateTimer[formKey];
        else
        {
            timer = new Timer();
            DeactivateTimer.Add(formKey, timer);
        }

        return timer;
    }

    // 
    private void FloatMenu_Deactivate(object sender, EventArgs e)
    {
        MessageBox.Show("FloatMenu_Deactivate");
    }

    // 控制窗体在桌面边缘的隐藏
    public static void BorderHide(Form form)
    {
        if (form == null) return;

        String formKey = form.Text; // 获取窗体名称
        getTimer(formKey);

        // 判定窗体form在桌面中的位置隐藏逻辑
        //if

    }

    //SystemInformation.WorkingArea.Width

    #endregion


    #region 控制Form2在Form1的下方停靠

    // 记录Form的停靠信息
    public static Dictionary dockFormInfo = new Dictionary();

    // 设置Form2停靠于Form1的下方
    public static void setDock(Form form1, Form form2)
    {
        Rectangle Rect1 = form1.ClientRectangle;
        Rectangle Rect2 = form2.ClientRectangle;

        if (Math.Abs(Rect1.Bottom - Rect2.Bottom) < 10 && Math.Abs(Rect1.Left - Rect2.Left) < 30)
        {

        }
    }


    #endregion

    // 设置form2自动显示在form1的两边
    public static void AutoLocation_OnSide(Form form1, Form form2)
    {
        int x = form1.Location.X + form1.Width + 10;
        if (x > SystemInformation.WorkingArea.Width - form2.Width) x = form1.Location.X - form2.Width - 10;
        form2.Location = new Point(x, form1.Location.Y);
    }
}