WPF自定義窗體改變大小

本文轉載自查看原文 2012-11-26 15:58 4232 .net點滴/ 大小/ 窗體/ 自定義/ WPF

前台代碼：

后台代碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Runtime.InteropServices;
using System.Windows.Interop;

namespace SimpleZigBee
{
     /// <summary>
     /// 鼠標方向
     /// </summary>
     public enum ResizeDirection
    {
         /// <summary>
         /// 左
         /// </summary>
        Left = 1,
         /// <summary>
         /// 右
         /// </summary>
        Right = 2,
         /// <summary>
         /// 上
         /// </summary>
        Top = 3,
         /// <summary>
         /// 左上
         /// </summary>
        TopLeft = 4,
         /// <summary>
         /// 右上
         /// </summary>
        TopRight = 5,
         /// <summary>
         /// 下
         /// </summary>
        Bottom = 6,
         /// <summary>
         /// 左下
         /// </summary>
        BottomLeft = 7,
         /// <summary>
         /// 右下
         /// </summary>
        BottomRight = 8,
    }
     /// <summary>
     /// Window1.xaml 的交互邏輯
     /// </summary>
     public partial class Window1 : Window
    {
         private HwndSource _HwndSource;
         private const int WM_SYSCOMMAND = 0x112;
        [DllImport( " user32.dll ", CharSet = CharSet.Auto)]
         private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

         private Dictionary<ResizeDirection, Cursor> cursors = new Dictionary<ResizeDirection, Cursor>
        {
            {ResizeDirection.Top, Cursors.SizeNS},
            {ResizeDirection.Bottom, Cursors.SizeNS},
            {ResizeDirection.Left, Cursors.SizeWE},
            {ResizeDirection.Right, Cursors.SizeWE},
            {ResizeDirection.TopLeft, Cursors.SizeNWSE},
            {ResizeDirection.BottomRight, Cursors.SizeNWSE},
            {ResizeDirection.TopRight, Cursors.SizeNESW},
            {ResizeDirection.BottomLeft, Cursors.SizeNESW}
        };

         public Window1()
        {
            InitializeComponent();

             this.SourceInitialized += delegate( object sender, EventArgs e)
            {
                 this._HwndSource = PresentationSource.FromVisual((Visual)sender) as HwndSource;
            };

             this.MouseMove += new MouseEventHandler(Window_MouseMove);
        }

         void Window_MouseMove( object sender, MouseEventArgs e)
        {
             if (Mouse.LeftButton != MouseButtonState.Pressed)
            {
                FrameworkElement element = e.OriginalSource as FrameworkElement;
                 if (element != null && !element.Name.Contains( " Resize ")) this.Cursor = Cursors.Arrow;
            }
        }

         private void ResizePressed( object sender, MouseEventArgs e)
        {
            FrameworkElement element = sender as FrameworkElement;
            ResizeDirection direction = (ResizeDirection)Enum.Parse( typeof(ResizeDirection), element.Name.Replace( " Resize ", ""));

             this.Cursor = cursors[direction];
             if (e.LeftButton == MouseButtonState.Pressed) ResizeWindow(direction);
        }

         private void ResizeWindow(ResizeDirection direction)
        {
            SendMessage(_HwndSource.Handle, WM_SYSCOMMAND, (IntPtr)( 61440 + direction), IntPtr.Zero);
        }
    }
}

另CodeProject中有已經封裝好的類庫（有相應源碼下載）： http://www.codeproject.com/Articles/23138/WPF-Window-Resizing

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