WPF换肤之四：界面设计和代码设计分离
说起WPF来，除了总所周知的图形处理核心的变化外，和Winform比起来，还有一个巨大的变革，那就是真正意义上做到了界面设计和代码设计的分离。这样可以让美工和程序分开进行，而不是糅合在一块，这样做的好处当然也是显而易见的：提高了开发效率。
原先的设计方式
在我们之前设计的代码中，每当添加一个新的窗体的时候，我总是会在这个新的窗体的XAML文件中加入如下的代码，以便使样式能够应用上去：
<Window x:Class="WpfApplication1.MsgWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TestWindow" Height="391" Width="418" WindowStyle="None" AllowsTransparency="True" Background="Transparent" OpacityMask="White" ResizeMode="NoResize" PreviewMouseMove="ResetCursor" WindowStartupLocation="CenterScreen">
<Grid Background="Transparent">
<Border BorderThickness="5" BorderBrush="DarkGreen" CornerRadius="10,10,10,10" MouseMove="DisplayResizeCursor" PreviewMouseDown="Resize" Name="top">
<Border.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#eee"/>
</LinearGradientBrush>
</Border.Background>
<Grid>
<!--这里放置UIElement.-->
</Grid>
</Border>
</Grid>
</Window>
然后，在后台中，为了使窗体能够在最大化时不遮蔽任务栏，拖拉窗体边缘能够改变窗口大小，点按窗体可以实现拖拉的时候，在后台加入了如下的代码：
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.Windows.Interop;
using System.Diagnostics;
using System.Runtime.InteropServices; namespace WpfApplication1
{
/// <summary>
/// Interaction logic for TestWindow.xaml
/// </summary>
public partial class MsgWindow : Window
{
private const int WM_SYSCOMMAND = 0x112;
private HwndSource hs;
IntPtr retInt = IntPtr.Zero; public MsgWindow()
{
InitializeComponent();
this.SourceInitialized += new EventHandler(WSInitialized);
} void WSInitialized(object sender, EventArgs e)
{
hs = PresentationSource.FromVisual(this) as HwndSource;
hs.AddHook(new HwndSourceHook(WndProc));
} public double relativeClip = ; public enum ResizeDirection
{
Left = ,
Right = ,
Top = ,
TopLeft = ,
TopRight = ,
Bottom = ,
BottomLeft = ,
BottomRight = ,
} [DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam); private void ResizeWindow(ResizeDirection direction)
{
SendMessage(hs.Handle, WM_SYSCOMMAND, (IntPtr)( + direction), IntPtr.Zero);
} private void ResetCursor(object sender, MouseEventArgs e)
{
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
this.Cursor = Cursors.Arrow;
}
} private void Resize(object sender, MouseButtonEventArgs e)
{
Border clickedBorder = sender as Border; Point pos = Mouse.GetPosition(this);
double x = pos.X;
double y = pos.Y;
double w = this.ActualWidth;
double h = this.ActualHeight; if (x <= relativeClip & y <= relativeClip) // left top
{
this.Cursor = Cursors.SizeNWSE;
ResizeWindow(ResizeDirection.TopLeft);
}
if (x >= w - relativeClip & y <= relativeClip) //right top
{
this.Cursor = Cursors.SizeNESW;
ResizeWindow(ResizeDirection.TopRight);
} if (x >= w - relativeClip & y >= h - relativeClip) //bottom right
{
this.Cursor = Cursors.SizeNWSE;
ResizeWindow(ResizeDirection.BottomRight);
} if (x <= relativeClip & y >= h - relativeClip) // bottom left
{
this.Cursor = Cursors.SizeNESW;
ResizeWindow(ResizeDirection.BottomLeft);
} if ((x >= relativeClip & x <= w - relativeClip) & y <= relativeClip) //top
{
this.Cursor = Cursors.SizeNS;
ResizeWindow(ResizeDirection.Top);
} if (x >= w - relativeClip & (y >= relativeClip & y <= h - relativeClip)) //right
{
this.Cursor = Cursors.SizeWE;
ResizeWindow(ResizeDirection.Right);
} if ((x >= relativeClip & x <= w - relativeClip) & y > h - relativeClip) //bottom
{
this.Cursor = Cursors.SizeNS;
ResizeWindow(ResizeDirection.Bottom);
} if (x <= relativeClip & (y <= h - relativeClip & y >= relativeClip)) //left
{
this.Cursor = Cursors.SizeWE;
ResizeWindow(ResizeDirection.Left);
}
} private void DisplayResizeCursor(object sender, MouseEventArgs e)
{
Border clickBorder = sender as Border; Point pos = Mouse.GetPosition(this);
double x = pos.X;
double y = pos.Y;
double w= this.ActualWidth;
double h= this.ActualHeight; this.label1.Content = x + "--" + y; if (x <= relativeClip & y <= relativeClip) // left top
{
this.Cursor = Cursors.SizeNWSE;
}
if (x >= w - relativeClip & y <= relativeClip) //right top
{
this.Cursor = Cursors.SizeNESW;
} if (x >= w - relativeClip & y >= h - relativeClip) //bottom right
{
this.Cursor = Cursors.SizeNWSE;
} if (x <= relativeClip & y >= h - relativeClip) // bottom left
{
this.Cursor = Cursors.SizeNESW;
} if ((x >= relativeClip & x <= w - relativeClip) & y <= relativeClip) //top
{
this.Cursor = Cursors.SizeNS;
} if (x >= w - relativeClip & (y >= relativeClip & y <= h - relativeClip)) //right
{
this.Cursor = Cursors.SizeWE;
} if ((x >= relativeClip & x <= w - relativeClip) & y > h - relativeClip) //bottom
{
this.Cursor = Cursors.SizeNS;
} if (x <= relativeClip & (y <= h - relativeClip & y >= relativeClip)) //left
{
this.Cursor = Cursors.SizeWE;
}
} private void button1_Click(object sender, RoutedEventArgs e)
{
this.WindowState = (this.WindowState == WindowState.Normal ? WindowState.Maximized : WindowState.Normal);
}
#region 这一部分用于最大化时不遮蔽任务栏
private static void WmGetMinMaxInfo(System.IntPtr hwnd, System.IntPtr lParam)
{ MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO)); // Adjust the maximized size and position to fit the work area of the correct monitor
int MONITOR_DEFAULTTONEAREST = 0x00000002;
System.IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST); if (monitor != System.IntPtr.Zero)
{ MONITORINFO monitorInfo = new MONITORINFO();
GetMonitorInfo(monitor, monitorInfo);
RECT rcWorkArea = monitorInfo.rcWork;
RECT rcMonitorArea = monitorInfo.rcMonitor;
mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = Math.Abs(rcWorkArea.right - rcWorkArea.left);
mmi.ptMaxSize.y = Math.Abs(rcWorkArea.bottom - rcWorkArea.top);
} Marshal.StructureToPtr(mmi, lParam, true);
} /// <summary>
/// POINT aka POINTAPI
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
/// <summary>
/// x coordinate of point.
/// </summary>
public int x;
/// <summary>
/// y coordinate of point.
/// </summary>
public int y; /// <summary>
/// Construct a point of coordinates (x,y).
/// </summary>
public POINT(int x, int y)
{
this.x = x;
this.y = y;
}
} /// <summary>
/// 窗体大小信息
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct MINMAXINFO
{
public POINT ptReserved;
public POINT ptMaxSize;
public POINT ptMaxPosition;
public POINT ptMinTrackSize;
public POINT ptMaxTrackSize;
};
/// <summary> Win32 </summary>
[StructLayout(LayoutKind.Sequential, Pack = )]
public struct RECT
{
/// <summary> Win32 </summary>
public int left;
/// <summary> Win32 </summary>
public int top;
/// <summary> Win32 </summary>
public int right;
/// <summary> Win32 </summary>
public int bottom; /// <summary> Win32 </summary>
public static readonly RECT Empty = new RECT(); /// <summary> Win32 </summary>
public int Width
{
get { return Math.Abs(right - left); } // Abs needed for BIDI OS
}
/// <summary> Win32 </summary>
public int Height
{
get { return bottom - top; }
} /// <summary> Win32 </summary>
public RECT(int left, int top, int right, int bottom)
{
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
} /// <summary> Win32 </summary>
public RECT(RECT rcSrc)
{
this.left = rcSrc.left;
this.top = rcSrc.top;
this.right = rcSrc.right;
this.bottom = rcSrc.bottom;
} /// <summary> Win32 </summary>
public bool IsEmpty
{
get
{
// BUGBUG : On Bidi OS (hebrew arabic) left > right
return left >= right || top >= bottom;
}
}
/// <summary> Return a user friendly representation of this struct </summary>
public override string ToString()
{
if (this == RECT.Empty) { return "RECT {Empty}"; }
return "RECT { left : " + left + " / top : " + top + " / right : " + right + " / bottom : " + bottom + " }";
} /// <summary> Determine if 2 RECT are equal (deep compare) </summary>
public override bool Equals(object obj)
{
if (!(obj is Rect)) { return false; }
return (this == (RECT)obj);
} /// <summary>Return the HashCode for this struct (not garanteed to be unique)</summary>
public override int GetHashCode()
{
return left.GetHashCode() + top.GetHashCode() + right.GetHashCode() + bottom.GetHashCode();
} /// <summary> Determine if 2 RECT are equal (deep compare)</summary>
public static bool operator ==(RECT rect1, RECT rect2)
{
return (rect1.left == rect2.left && rect1.top == rect2.top && rect1.right == rect2.right && rect1.bottom == rect2.bottom);
} /// <summary> Determine if 2 RECT are different(deep compare)</summary>
public static bool operator !=(RECT rect1, RECT rect2)
{
return !(rect1 == rect2);
}
} [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class MONITORINFO
{
/// <summary>
/// </summary>
public int cbSize = Marshal.SizeOf(typeof(MONITORINFO)); /// <summary>
/// </summary>
public RECT rcMonitor = new RECT(); /// <summary>
/// </summary>
public RECT rcWork = new RECT(); /// <summary>
/// </summary>
public int dwFlags = ;
} [DllImport("user32")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi); [DllImport("User32")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
#endregion private void MyMacClass_SourceInitialized(object sender, EventArgs e)
{
hs = PresentationSource.FromVisual((Visual)sender) as HwndSource;
hs.AddHook(new HwndSourceHook(WndProc));
} private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 0x0024:/* WM_GETMINMAXINFO */
WmGetMinMaxInfo(hwnd, lParam);
handled = true;
break;
default: break;
}
return (System.IntPtr);
} }
}
如果按照上面的设计，那么每加入一个新的窗体，都要重复上面的两个步骤的话，加入一个工程中需要加入的新窗体特别多，估计这种操作足以让一个正常人疯掉了。并且假如以后border的颜色要修改，那得修改多少页面啊~~~
改进的设计方式
所以，为了便于设计和维护，实现所谓的UI和代码分析，让我们提出一个假设的方案来：
首先，所有的公共样式放到一个样式文件中，所有新加的窗体都能共享这个公共的样式文件。
其次，所有的公共事件（窗体最大化，最小化，关闭等），都放到一个公共的基类中，所有新加的窗体只要继承该基类，即可继承系统公用的事件操作。
那么，本着这个假设，我们开始来进行。
首先，对于公共样式，我们需要添加一个“资源词典”的页面，用来设计公共样式：
添加完成后，会看到如下XAML：
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> </ResourceDictionary>
下面我们在这个文件中添加样式：
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="MyOwnerDrawnWindow.Resource_Dictionaries.MyTheme"
>
<!-- Border defining the frame of the Window -->
<Style x:Key="MywindowBorder" TargetType="Border">
<Setter Property="CornerRadius" Value="10, 10, 10, 10" />
<Setter Property="BorderBrush" Value="DarkGreen"></Setter>
<Setter Property="BorderThickness" Value="5" />
<Setter Property="HorizontalAlignment" Value="Stretch"></Setter>
<Setter Property="VerticalAlignment" Value="Stretch"></Setter>
<Setter Property="Background" Value="#ababab"></Setter>
</Style>
<ControlTemplate x:Key="MyWindowTemplate" TargetType="{x:Type Window}">
<Grid>
<Border x:Name="MyBorder" Style="{StaticResource MywindowBorder}" >
<Border.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#eee"/>
</LinearGradientBrush>
</Border.Background>
<!--这一句很重要，主要用于放置界面元素，和asp.net中的masterpage有点像-->
<AdornerDecorator>
<ContentPresenter />
</AdornerDecorator>
</Border>
</Grid>
</ControlTemplate>
<!-- My Window Style -->
<Style x:Key="MyWindowStyle" TargetType="Window">
<Setter Property="Background" Value="Transparent" />
<Setter Property="WindowStyle" Value="None" />
<Setter Property="AllowsTransparency" Value="True" />
<Setter Property="Template" Value="{StaticResource MyWindowTemplate}" />
</Style>
</ResourceDictionary>
好了，这就是我们的样式文件，接下来我们需要处理这个样式中的Border事件，让其支持鼠标左键拖拉功能。
新建一个类，命名为MyThemeClass.cs，让其继承自Window基类。在MyThemeClass类中，我们主要处理两个内容，一个是支持鼠标左键拖拉以便改变窗体大小，另一个是使窗体不遮蔽任务栏。
具体代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Interop;
using System.Runtime.InteropServices;
using System.Windows.Controls;
using System.Windows.Input;
namespace MyOwnerDrawnWindow
{
public class MyThemeClass:Window
{
private const int WM_SYSCOMMAND = 0x112;
public const int WM_LBUTTONUP = 0x0202;
private HwndSource hs;
IntPtr retInt = IntPtr.Zero;
public double relativeClip = ;
public MyThemeClass()
{
this.Loaded += delegate
{
InitializeEvent();
};
this.SourceInitialized +=new EventHandler(MyMacClass_SourceInitialized);
}
private void MyMacClass_SourceInitialized(object sender, EventArgs e)
{
hs = PresentationSource.FromVisual((Visual)sender) as HwndSource;
hs.AddHook(new HwndSourceHook(WndProc));
}
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 0x0024:/* WM_GETMINMAXINFO */
WmGetMinMaxInfo(hwnd, lParam);
handled = true;
break;
default: break;
}
return (System.IntPtr);
}
#region 这一部分用于最大化时不遮蔽任务栏
private static void WmGetMinMaxInfo(System.IntPtr hwnd, System.IntPtr lParam)
{
MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
// Adjust the maximized size and position to fit the work area of the correct monitor
int MONITOR_DEFAULTTONEAREST = 0x00000002;
System.IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
if (monitor != System.IntPtr.Zero)
{
MONITORINFO monitorInfo = new MONITORINFO();
GetMonitorInfo(monitor, monitorInfo);
RECT rcWorkArea = monitorInfo.rcWork;
RECT rcMonitorArea = monitorInfo.rcMonitor;
mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = Math.Abs(rcWorkArea.right - rcWorkArea.left);
mmi.ptMaxSize.y = Math.Abs(rcWorkArea.bottom - rcWorkArea.top);
}
Marshal.StructureToPtr(mmi, lParam, true);
}
/// <summary>
/// POINT aka POINTAPI
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
/// <summary>
/// x coordinate of point.
/// </summary>
public int x;
/// <summary>
/// y coordinate of point.
/// </summary>
public int y;
/// <summary>
/// Construct a point of coordinates (x,y).
/// </summary>
public POINT(int x, int y)
{
this.x = x;
this.y = y;
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MINMAXINFO
{
public POINT ptReserved;
public POINT ptMaxSize;
public POINT ptMaxPosition;
public POINT ptMinTrackSize;
public POINT ptMaxTrackSize;
};
[StructLayout(LayoutKind.Sequential, Pack = )]
public struct RECT
{
/// <summary> Win32 </summary>
public int left;
/// <summary> Win32 </summary>
public int top;
/// <summary> Win32 </summary>
public int right;
/// <summary> Win32 </summary>
public int bottom;
/// <summary> Win32 </summary>
public static readonly RECT Empty = new RECT();
/// <summary> Win32 </summary>
public int Width
{
get { return Math.Abs(right - left); } // Abs needed for BIDI OS
}
/// <summary> Win32 </summary>
public int Height
{
get { return bottom - top; }
}
/// <summary> Win32 </summary>
public RECT(int left, int top, int right, int bottom)
{
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
}
/// <summary> Win32 </summary>
public RECT(RECT rcSrc)
{
this.left = rcSrc.left;
this.top = rcSrc.top;
this.right = rcSrc.right;
this.bottom = rcSrc.bottom;
}
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class MONITORINFO
{
/// <summary>
/// </summary>
public int cbSize = Marshal.SizeOf(typeof(MONITORINFO));
/// <summary>
/// </summary>
public RECT rcMonitor = new RECT();
/// <summary>
/// </summary>
public RECT rcWork = new RECT();
/// <summary>
/// </summary>
public int dwFlags = ;
}
[DllImport("user32")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
[DllImport("User32")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
#endregion
#region 这一部分是四个边加上四个角
public enum ResizeDirection
{
Left = ,
Right = ,
Top = ,
TopLeft = ,
TopRight = ,
Bottom = ,
BottomLeft = ,
BottomRight = ,
}
#endregion
#region 用于改变窗体大小
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
private void ResizeWindow(ResizeDirection direction)
{
SendMessage(hs.Handle, WM_SYSCOMMAND, (IntPtr)( + direction), IntPtr.Zero);
}
#endregion
#region 为元素注册事件
private void InitializeEvent()
{
ControlTemplate baseWindowTemplate = (ControlTemplate)App.Current.Resources["MyWindowTemplate"];
Border borderClip = (Border)baseWindowTemplate.FindName("MyBorder", this);
borderClip.MouseMove += delegate
{
DisplayResizeCursor(null,null);
};
borderClip.PreviewMouseDown += delegate
{
Resize(null,null);
};
borderClip.MouseLeftButtonDown += delegate
{
DragMove();
};
this.PreviewMouseMove += delegate
{
ResetCursor(null,null);
};
}
#endregion
#region 重写的DragMove，以便解决利用系统自带的DragMove出现Exception的情况
public new void DragMove()
{
if (this.WindowState == WindowState.Normal)
{
SendMessage(hs.Handle, WM_SYSCOMMAND, (IntPtr)0xf012, IntPtr.Zero);
SendMessage(hs.Handle, WM_LBUTTONUP, IntPtr.Zero, IntPtr.Zero);
}
}
#endregion
#region 显示拖拉鼠标形状
private void DisplayResizeCursor(object sender, MouseEventArgs e)
{
Point pos = Mouse.GetPosition(this);
double x = pos.X;
double y = pos.Y;
double w = this.ActualWidth; //注意这个地方使用ActualWidth,才能够实时显示宽度变化
double h = this.ActualHeight;
if (x <= relativeClip & y <= relativeClip) // left top
{
this.Cursor = Cursors.SizeNWSE;
}
if (x >= w - relativeClip & y <= relativeClip) //right top
{
this.Cursor = Cursors.SizeNESW;
}
if (x >= w - relativeClip & y >= h - relativeClip) //bottom right
{
this.Cursor = Cursors.SizeNWSE;
}
if (x <= relativeClip & y >= h - relativeClip) // bottom left
{
this.Cursor = Cursors.SizeNESW;
}
if ((x >= relativeClip & x <= w - relativeClip) & y <= relativeClip) //top
{
this.Cursor = Cursors.SizeNS;
}
if (x >= w - relativeClip & (y >= relativeClip & y <= h - relativeClip)) //right
{
this.Cursor = Cursors.SizeWE;
}
if ((x >= relativeClip & x <= w - relativeClip) & y > h - relativeClip) //bottom
{
this.Cursor = Cursors.SizeNS;
}
if (x <= relativeClip & (y <= h - relativeClip & y >= relativeClip)) //left
{
this.Cursor = Cursors.SizeWE;
}
}
#endregion
#region 还原鼠标形状
private void ResetCursor(object sender, MouseEventArgs e)
{
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
this.Cursor = Cursors.Arrow;
}
}
#endregion
#region 判断区域，改变窗体大小
private void Resize(object sender, MouseButtonEventArgs e)
{
Point pos = Mouse.GetPosition(this);
double x = pos.X;
double y = pos.Y;
double w = this.ActualWidth;
double h = this.ActualHeight;
if (x <= relativeClip & y <= relativeClip) // left top
{
this.Cursor = Cursors.SizeNWSE;
ResizeWindow(ResizeDirection.TopLeft);
}
if (x >= w - relativeClip & y <= relativeClip) //right top
{
this.Cursor = Cursors.SizeNESW;
ResizeWindow(ResizeDirection.TopRight);
}
if (x >= w - relativeClip & y >= h - relativeClip) //bottom right
{
this.Cursor = Cursors.SizeNWSE;
ResizeWindow(ResizeDirection.BottomRight);
}
if (x <= relativeClip & y >= h - relativeClip) // bottom left
{
this.Cursor = Cursors.SizeNESW;
ResizeWindow(ResizeDirection.BottomLeft);
}
if ((x >= relativeClip & x <= w - relativeClip) & y <= relativeClip) //top
{
this.Cursor = Cursors.SizeNS;
ResizeWindow(ResizeDirection.Top);
}
if (x >= w - relativeClip & (y >= relativeClip & y <= h - relativeClip)) //right
{
this.Cursor = Cursors.SizeWE;
ResizeWindow(ResizeDirection.Right);
}
if ((x >= relativeClip & x <= w - relativeClip) & y > h - relativeClip) //bottom
{
this.Cursor = Cursors.SizeNS;
ResizeWindow(ResizeDirection.Bottom);
}
if (x <= relativeClip & (y <= h - relativeClip & y >= relativeClip)) //left
{
this.Cursor = Cursors.SizeWE;
ResizeWindow(ResizeDirection.Left);
}
}
#endregion
}
}
这样，我们的Theme和类就创建好了，那么，在主窗体中，我们该如何应用上去呢？当然，这个不是难事，并且异常简单：
首先，创建一个新的窗体Window1, 它需要继承自MyThemeClass类：
public partial class Window1 : MyThemeClass
然后再XAML中只需要修改两个地方，首先是添加入一个新的引用：
xmlns:src="clr-namespace:MyOwnerDrawnWindow"
添加完这个引用后，把<Window….></Window>修改成<src:MyThemeClass……></ MyThemeClass> 这样做的目的是防止由于继承基类的不同而造成XAML的识别错误。
最后，只需要添加这句Style="{StaticResource MyWindowStyle}" 就行了。 这样就算是添加完成了新的窗体，每一个新添加的窗体都按照这种方式添加即可，是不是简洁了许多？ 并且后期维护也简单多了。
<src:MyThemeClass x:Class="MyOwnerDrawnWindow.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:src="clr-namespace:MyOwnerDrawnWindow"
Title="Window1" Height="335" Width="706"
Style="{StaticResource MyWindowStyle}">
<Grid>
<!--这里放置你的UIElement-->
</Grid>
</src:MyThemeClass>
好了，最后一步就是讲Theme文件关联起来，在APP.xaml文件中添加对资源文件的引用即可：
<Application x:Class="MyOwnerDrawnWindow.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="Window1.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="MyTheme.xaml"></ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
这样运行起来以后，达到的预期的效果。
源码下载
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