WPF学习笔记“窗口”二:入门

　　制作自定义窗口

　　

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        AllowsTransparency="True" Background="{x:Null}" WindowStyle="None"
        x:Name="WindowName">
    <Grid>
        <Border>
            <Border.CornerRadius>
                <CornerRadius TopLeft="20" TopRight="20" BottomLeft="20" BottomRight="20"></CornerRadius>
            </Border.CornerRadius>
            <Border.Background>
                <LinearGradientBrush>
                    <GradientStop Offset="0" Color="Red"></GradientStop>
                    <GradientStop Offset="1" Color="Black"></GradientStop>
                    <GradientStop Offset="0.5" Color="Azure"></GradientStop>
                </LinearGradientBrush>
            </Border.Background>
            <Button Content="Button" Height="23" Name="button1" Width="75" Click="button1_Click" />
        </Border>
    </Grid>
</Window>

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.Navigation;
using System.Windows.Shapes;
using System.Windows.Interop;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        protected override void OnSourceInitialized( EventArgs e)
        {

            base.OnSourceInitialized(e);  
            HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;
            if (hwndSource.IsDisposed == true)
            {
                hwndSource.AddHook(new HwndSourceHook(this.WndProc));
            }
            else
            {
               
            }

        }

        private const int WM_NCHITTEST = 0x0084;
        private readonly int agWidth = 12; //拐角宽度   
        private readonly int bThickness = 4; // 边框宽度   
        private Point mousePoint = new Point(); //鼠标坐标   

        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {

            switch (msg)
            {
                case WM_NCHITTEST:
                    this.mousePoint.X = (lParam.ToInt32() & 0xFFFF);
                    this.mousePoint.Y = (lParam.ToInt32() >> 16);


                    // 窗口左上角   
                    if (this.mousePoint.Y - this.Top <= this.agWidth
                       && this.mousePoint.X - this.Left <= this.agWidth)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTTOPLEFT);
                    }
                    // 窗口左下角       
                    else if (this.ActualHeight + this.Top - this.mousePoint.Y <= this.agWidth
                       && this.mousePoint.X - this.Left <= this.agWidth)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTBOTTOMLEFT);
                    }
                    // 窗口右上角   
                    else if (this.mousePoint.Y - this.Top <= this.agWidth
                       && this.ActualWidth + this.Left - this.mousePoint.X <= this.agWidth)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTTOPRIGHT);
                    }
                    // 窗口右下角   
                    else if (this.ActualWidth + this.Left - this.mousePoint.X <= this.agWidth
                       && this.ActualHeight + this.Top - this.mousePoint.Y <= this.agWidth)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTBOTTOMRIGHT);
                    }
                    // 窗口左侧   
                    else if (this.mousePoint.X - this.Left <= this.bThickness)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTLEFT);
                    }
                    // 窗口右侧   
                    else if (this.ActualWidth + this.Left - this.mousePoint.X <= this.bThickness)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTRIGHT);
                    }
                    // 窗口上方   
                    else if (this.mousePoint.Y - this.Top <= this.bThickness)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTTOP);
                    }
                    // 窗口下方   
                    else if (this.ActualHeight + this.Top - this.mousePoint.Y <= this.bThickness)
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTBOTTOM);
                    }
                    else // 窗口移动   
                    {
                        handled = true;
                        return new IntPtr((int)HitTest.HTCAPTION);
                    }
            }
            return IntPtr.Zero;   

        }
        public static Int32 GET_X_LPARAM(int lParam)
        {

            return (lParam & 0xffff);

        }
        public static Int32 GET_Y_LPARAM(int lParam)
        {

            return (lParam >> 16);

        }
        public enum HitTest
        {

            HTERROR = -2,

            HTTRANSPARENT = -1,

            HTNOWHERE = 0,

            HTCLIENT = 1,

            HTCAPTION = 2,

            HTSYSMENU = 3,

            HTGROWBOX = 4,

            HTSIZE = HTGROWBOX,

            HTMENU = 5,

            HTHSCROLL = 6,

            HTVSCROLL = 7,

            HTMINBUTTON = 8,

            HTMAXBUTTON = 9,

            HTLEFT = 10,

            HTRIGHT = 11,

            HTTOP = 12,

            HTTOPLEFT = 13,

            HTTOPRIGHT = 14,

            HTBOTTOM = 15,

            HTBOTTOMLEFT = 16,

            HTBOTTOMRIGHT = 17,

            HTBORDER = 18,

            HTREDUCE = HTMINBUTTON,

            HTZOOM = HTMAXBUTTON,

            HTSIZEFIRST = HTLEFT,

            HTSIZELAST = HTBOTTOMRIGHT,

            HTOBJECT = 19,

            HTCLOSE = 20,

            HTHELP = 21,

        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            
        }
    }
}