例如，我有以下代码，因此用户可以拖动标题栏来移动窗口，也可以双击以最大化它。
private void moveRectangle_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
if (Mouse.LeftButton == MouseButtonState.Pressed) DragMove();
if (e.ClickCount == 2) WindowState = (WindowState == WindowState.Normal) ? WindowState.Maximized : WindowState.Normal;
}
然后我有了这个代码，因此可以拖动窗口边框来调整它的大小。
protected void resizeRectangle_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
Rectangle rectangle = (Rectangle)sender;
switch (rectangle.Name)
{
case "TopSide":
Cursor = Cursors.SizeNS;
ResizeWindow(ResizeDirection.Top);
if (e.ClickCount == 2)
{
//Maximize window height here?
}
break;
//Et cetera...
}
}
但我还想让用户双击顶部或底部边框，使窗口的高度最大化。我无法使用'Screen.PrimaryScreen.Bounds.Height'或类似的东西。 究竟能做到什么？
答案 0 :(得分：0)
我想你不能使用Screen.PrimaryScreen.Bounds.Height，因为它不包括任务栏的大小。
好的，所以准备这个答案因为它有点长。但是，这将根据桌面的可用大小为您提供真正的最大化（即最大化按钮可以产生这种效果）。
基本上这里发生的是当windows想要调整窗口大小（或最小/最大）时，它会向窗口询问有关窗口大小限制的一些信息。我们在这里做的是给它你想要的约束（在Y上最大化，保持相同的X，不要改变宽度）。
<Window x:Class="BindingTest.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" x:Name="self" DataContext="{Binding ElementName=self}">
<Grid>
<Button Click="ButtonClick">
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<DataTrigger Binding="{Binding EnableSkinnyMode}" Value="True">
<Setter Property="Content" Value="Disable Skinny Mode "></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding EnableSkinnyMode}" Value="False">
<Setter Property="Content" Value="Enable Skinny Mode "></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</Grid>
</Window>
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Windows;
namespace BindingTest
{
public partial class MainWindow : IDisposable, INotifyPropertyChanged
{
public bool EnableSkinnyMode
{
get { return enableSkinnyMode; }
set
{
if (value == enableSkinnyMode) return;
enableSkinnyMode = value;
OnPropertyChanged("EnableSkinnyMode");
}
}
private bool enableSkinnyMode;
public MainWindow()
{
InitializeComponent();
this.SourceInitialized += win_SourceInitialized;
}
private void ButtonClick(object sender, RoutedEventArgs e)
{
EnableSkinnyMode = EnableSkinnyMode == false;
}
private void win_SourceInitialized(object sender, EventArgs e)
{
System.IntPtr handle = (new System.Windows.Interop.WindowInteropHelper(this)).Handle;
System.Windows.Interop.HwndSource.FromHwnd(handle).AddHook(WindowProc);
}
private System.IntPtr WindowProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 0x0024:/* WM_GETMINMAXINFO */
if (EnableSkinnyMode)
{
WindowInteropHelper.WmGetMinMaxInfo(this, hwnd, lParam);
handled = true;
}
break;
}
return (System.IntPtr)0;
}
public void Dispose()
{
this.SourceInitialized -= win_SourceInitialized;
System.IntPtr handle = (new System.Windows.Interop.WindowInteropHelper(this)).Handle;
System.Windows.Interop.HwndSource.FromHwnd(handle).RemoveHook(WindowProc);
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
public class WindowInteropHelper
{
[DllImport("user32")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
[DllImport("User32")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
public static void WmGetMinMaxInfo(Window window, 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 = (int)window.Left;
//mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = (int)window.Width;
//mmi.ptMaxSize.x = Math.Abs(rcWorkArea.right - rcWorkArea.left);
mmi.ptMaxSize.y = Math.Abs(rcWorkArea.bottom - rcWorkArea.top);
mmi.ptMinTrackSize.x = (int)window.MinWidth;
mmi.ptMinTrackSize.y = (int)window.MinHeight;
}
Marshal.StructureToPtr(mmi, lParam, true);
}
#region InteropStructs
[StructLayout(LayoutKind.Sequential)]
public struct MINMAXINFO
{
public POINT ptReserved;
public POINT ptMaxSize;
public POINT ptMaxPosition;
public POINT ptMinTrackSize;
public POINT ptMaxTrackSize;
};
[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, 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 = 0;
}
[StructLayout(LayoutKind.Sequential, Pack = 0)]
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);
}
}
#endregion
}
}