WPF设计の自定义窗体

效果图如下：

 

实现思路： 

1.继承Window类

2.为自定义的CustomWindow类设计窗体样式（使用Blend很方便！）

3.为窗体增加最大最小化和关闭按钮，并实现鼠标拖拽改变窗体大小(使用Derek Bartram的WindowResizer.dll库) 

代码说明：

1.继承Window类

创建CustomWindow类，继承自System.Window 

public class CustomWindow : Window
{
    public CustomWindow()
    {
        // 加载样式
        InitializeStyle(); 

        // 加载事件委托
        this.Loaded += delegate { InitializeEvent(); };

        // 解决最大化覆盖任务栏问题
        this.SourceInitialized += new EventHandler(win_SourceInitialized);
    }
}

<src:CustomWindow
    x:Class="windowStyle1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:src="clr-namespace:windowStyle1"
    Title="CustomWindow" 
    Height="358" Width="649" AllowsTransparency="True" WindowStyle="None">

2.为自定义的CustomWindow类设计窗体样式

窗体样式的设计可以使用Expression Blend来进行可视化开发，非常方便

 

Blend会自动生成样式的xmal文件：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Luna">
   
    <ControlTemplate x:Key="WindowTemplateKey" TargetType="{x:Type Window}">
        <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
            <Grid>
                <AdornerDecorator>
                    <ContentPresenter/>
                </AdornerDecorator>
                <ResizeGrip x:Name="WindowResizeGrip" HorizontalAlignment="Right" VerticalAlignment="Bottom" IsTabStop="false" Visibility="Collapsed"/>
            </Grid>
        </Border>
        <ControlTemplate.Triggers>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="ResizeMode" Value="CanResizeWithGrip"/>
                    <Condition Property="WindowState" Value="Normal"/>
                </MultiTrigger.Conditions>
                <Setter Property="Visibility" TargetName="WindowResizeGrip" Value="Visible"/>
            </MultiTrigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

3.为窗体增加最大最小化和关闭按钮，并实现鼠标拖拽改变窗体大小 

按钮事件比较简单，通过分别为三个按钮添加Click事件即可

/// <summary>
/// 加载按钮事件委托
/// </summary>
private void InitializeEvent()
{
    ControlTemplate baseWindowTemplate = (ControlTemplate)App.Current.Resources["CustomWindowControlTemplate"];

    Button minBtn = (Button)baseWindowTemplate.FindName("btnMin", this);
    minBtn.Click += delegate
    {
        this.WindowState = WindowState.Minimized;
    };

    Button maxBtn = (Button)baseWindowTemplate.FindName("btnMax", this);
    maxBtn.Click += delegate
    {
        this.WindowState = (this.WindowState == WindowState.Normal ? WindowState.Maximized : WindowState.Normal);
    };

    Button closeBtn = (Button)baseWindowTemplate.FindName("btnClose", this);
    closeBtn.Click += delegate
    {
        this.Close();
    };

    Border tp = (Border)baseWindowTemplate.FindName("topborder", this);

    tp.MouseLeftButtonDown += delegate
    {
        this.DragMove();
    };
}

仅仅这样实现的话还不够，因为窗体最大化后会覆盖任务栏，这是我们不希望看到的，所以还必须通过WINDOW API的窗口句柄来定义最大化后的尺寸

/// <summary>
/// 重绘窗体大小
/// </summary>
void win_SourceInitialized(object sender, EventArgs e)
{
    System.IntPtr handle = (new WinInterop.WindowInteropHelper(this)).Handle;
    WinInterop.HwndSource.FromHwnd(handle).AddHook(new WinInterop.HwndSourceHook(WindowProc));
}
...
[DllImport("user32")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);

[DllImport("User32")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
...
private static System.IntPtr WindowProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled)
{
    switch (msg)
    {
        case 0x0024:
            WmGetMinMaxInfo(hwnd, lParam);
            handled = true;
            break;
    }
    return (System.IntPtr)0;
}

最后是实现用鼠标拖拽改变窗体大小

然后在Windows1这个CustomWindow类的实例中绘制左右及底部5个拖拽热区（矩形）

 

最后在Window1.xaml.cs中添加事件委托即可 

/// <summary>
/// 加载Resize委托
/// </summary>
public void InitializeResizeHandle()
{
    WindowResizer wr = new WindowResizer(this);
    wr.addResizerRight(right);
    wr.addResizerLeft(left);
    wr.addResizerDown(bottom);
    wr.addResizerLeftDown(leftbottom);
    wr.addResizerRightDown(rightbottom);
    //wr.addResizerUp(topSizeGrip);
    //wr.addResizerLeftUp(topLeftSizeGrip);
    //wr.addResizerRightUp(topRightSizeGrip);
}

 大功告成了！