WPF 自定义最大化及还原按钮，支持双击标题栏空白处的最大化及还原处理
App.xaml代码：
MainWindow.xaml代码:
MainWindow.xaml.cs代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;
namespace WpfToolbar
{
///
/// MainWindow.xaml 的交互逻辑
///
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
WindowsFullScreenHelper.SetWindowFullScrreng(this);
}
private void bdMin_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.WindowState = WindowState.Minimized;
}
bool isExcuted = false;//点击最大化按钮时，阻止被StateChanged事件再次调用
private void bdMax_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
isExcuted = true;
if (this.WindowState == System.Windows.WindowState.Normal)
{
this.imgMax.Source = new BitmapImage(new Uri("Image/recover2.png", UriKind.Relative));
this.WindowState = System.Windows.WindowState.Maximized;
}
else
{
this.imgMax.Source = new BitmapImage(new Uri("Image/max2.png", UriKind.Relative));
this.WindowState = System.Windows.WindowState.Normal;
}
isExcuted = false;
}
private void bdClose_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.Close();
}
private void Window_StateChanged(object sender, EventArgs e)
{
if (!isExcuted)
{
if (this.WindowState == System.Windows.WindowState.Normal)
{
this.imgMax.Source = new BitmapImage(new Uri("Image/max2.png", UriKind.Relative));
this.WindowState = System.Windows.WindowState.Normal;
}
else if (this.WindowState == WindowState.Maximized)
{
this.imgMax.Source = new BitmapImage(new Uri("Image/recover2.png", UriKind.Relative));
this.WindowState = System.Windows.WindowState.Maximized;
}
}
}
}
}
WindowsFullScreenHelper类代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows;
using System.Windows.Interop;
namespace WpfToolbar
{
public class WindowsFullScreenHelper
{
private static Window movewin;
public static void SetWindowFullScrreng(Window wpfWindow)
{
movewin = wpfWindow;
if (wpfWindow == null)
{
return;
}
if (wpfWindow.WindowState == WindowState.Maximized)
{
wpfWindow.WindowState = WindowState.Normal;
wpfWindow.Loaded += delegate { wpfWindow.WindowState = WindowState.Maximized; };
}
wpfWindow.SourceInitialized += delegate
{
IntPtr handle = (new WindowInteropHelper(wpfWindow)).Handle;
HwndSource source = HwndSource.FromHwnd(handle);
if (source != null)
{
source.AddHook(WindowProc);
}
};
}
private static IntPtr WindowProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 0x0024:
WmGetMinMaxInfo(hwnd, lParam);
// handled = true;
break;
}
return (IntPtr)0;
}
private static void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)
{
var 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;
IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
if (monitor != IntPtr.Zero)
{
var 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);
}
[DllImport("user32")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
///
///
///
[DllImport("User32")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
#region Nested type: MINMAXINFO
[StructLayout(LayoutKind.Sequential)]
internal struct MINMAXINFO
{
public POINT ptReserved;
public POINT ptMaxSize;
public POINT ptMaxPosition;
public POINT ptMinTrackSize;
public POINT ptMaxTrackSize;
};
#endregion
#region Nested type: MONITORINFO
///
///
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
internal class MONITORINFO
{
///
///
public int cbSize = Marshal.SizeOf(typeof(MONITORINFO));
///
///
public RECT rcMonitor;
///
///
public RECT rcWork;
///
///
public int dwFlags;
}
#endregion
#region Nested type: POINT
///
/// POINT aka POINTAPI
///
[StructLayout(LayoutKind.Sequential)]
internal struct POINT
{
///
/// x coordinate of point.
///
public int x;
///
/// y coordinate of point.
///
public int y;
///
/// Construct a point of coordinates (x,y).
///
public POINT(int x, int y)
{
this.x = x;
this.y = y;
}
}
#endregion
#region Nested type: RECT
/// Win32
[StructLayout(LayoutKind.Sequential, Pack = 0)]
internal struct RECT
{
/// Win32
public int left;
/// Win32
public int top;
/// Win32
public int right;
/// Win32
public int bottom;
/// Win32
public static readonly RECT Empty;
/// Win32
public int Width
{
get { return Math.Abs(right - left); } // Abs needed for BIDI OS
}
/// Win32
public int Height
{
get { return bottom - top; }
}
/// Win32
public RECT(int left, int top, int right, int bottom)
{
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
}
/// Win32
public RECT(RECT rcSrc)
{
left = rcSrc.left;
top = rcSrc.top;
right = rcSrc.right;
bottom = rcSrc.bottom;
}
/// Win32
public bool IsEmpty
{
get
{
// BUGBUG : On Bidi OS (hebrew arabic) left > right
return left >= right || top >= bottom;
}
}
/// Return a user friendly representation of this struct
public override string ToString()
{
if (this == Empty)
{
return "RECT {Empty}";
}
return "RECT { left : " + left + " / top : " + top + " / right : " + right + " / bottom : " + bottom +
" }";
}
/// Determine if 2 RECT are equal (deep compare)
public override bool Equals(object obj)
{
if (!(obj is System.Windows.Rect))
{
return false;
}
return (this == (RECT)obj);
}
/// Return the HashCode for this struct (not garanteed to be unique)
public override int GetHashCode()
{
return left.GetHashCode() + top.GetHashCode() + right.GetHashCode() + bottom.GetHashCode();
}
/// Determine if 2 RECT are equal (deep compare)
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);
}
/// Determine if 2 RECT are different(deep compare)
public static bool operator !=(RECT rect1, RECT rect2)
{
return !(rect1 == rect2);
}
}
#endregion
}
}