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调用一些WindowsAPI可以实现此需求
public partial class ShellWindow : Window
{
[DllImport("user32.dll", EntryPoint = "GetWindowLong")]
public static extern int GetWindowLong(IntPtr hwnd, int nIndex);
[DllImport("user32.dll", EntryPoint = "SetWindowLong")]
public static extern int SetWindowLong(IntPtr hMenu, int nIndex, int dwNewLong);
[DllImport("user32.dll")]
private static extern int SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags);
private bool m_IsHide;
public ShellWindow()
{
IsHide = false;
InitializeComponent();
}
private void ShellWindow_OnClosed(object sender, EventArgs e)
{
var dataContext = DataContext as WindowViewModelBase;
this.Owner.PreviewMouseLeftButtonUp -= Owner_PreviewMouseLeftButtonUp;
this.Owner.PreviewMouseMove -= Owner_PreviewMouseMove;
dataContext?.OnWindowClosed();
}
protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
if (IsHide)
{
this.Hide();
e.Cancel = true;
}
else
{
base.OnClosing(e);
}
}
private void ShellWindow_OnLoaded(object sender, RoutedEventArgs e)
{
if (this.ResizeMode == ResizeMode.CanResize ||
this.ResizeMode == ResizeMode.CanResizeWithGrip)
{
IntPtr windowHandle = new WindowInteropHelper(this).Handle;
HwndSource windowSource = HwndSource.FromHwnd(windowHandle);
windowSource.AddHook(WndProc);
DisableMaxmizebox(true);//Shielding automatically maximize when drag the window to the edge of the screen
}
}
class NativeMethods
{
public const int WM_NCHITTEST = 0x84;
public const int HTCAPTION = 2;
public const int HTLEFT = 10;
public const int HTRIGHT = 11;
public const int HTTOP = 12;
public const int HTTOPLEFT = 13;
public const int HTTOPRIGHT = 14;
public const int HTBOTTOM = 15;
public const int HTBOTTOMLEFT = 16;
public const int HTBOTTOMRIGHT = 17;
}
public bool bResizeFlag = false;
private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
int GripSize = 16;
int BorderSize = 7;
ShellWindow win = (ShellWindow)System.Windows.Interop.HwndSource.FromHwnd(hwnd).RootVisual;
if(win == null)
{
return IntPtr.Zero;
}
if (msg == NativeMethods.WM_NCHITTEST)
{
int x = lParam.ToInt32() << 16 >> 16, y = lParam.ToInt32() >> 16;
Point pos = win.PointFromScreen(new Point(x, y));
//bottom
if (pos.X > GripSize &&
pos.X < win.ActualWidth - GripSize &&
pos.Y >= win.ActualHeight - BorderSize)
{
handled = true;
//return (IntPtr)NativeMethods.HTBOTTOM;
}
//Right
if (pos.Y > GripSize &&
pos.X > win.ActualWidth - BorderSize &&
pos.Y < win.ActualHeight - GripSize)
{
handled = true;
//return (IntPtr)NativeMethods.HTRIGHT;
}
// Top, Left, Right, Corners, Etc.
//HTBOTTOMRIGHT
if (pos.X > win.ActualWidth - GripSize &&
pos.X <= win.ActualWidth &&
pos.Y <=win.ActualHeight &&
pos.Y >= win.ActualHeight - GripSize)
{
handled = true;
win.SetEvent(win.PointToScreen(pos));
win.bResizeFlag = true;
return IntPtr.Zero;
//return (IntPtr)NativeMethods.HTBOTTOMRIGHT;
}
}
return IntPtr.Zero;
}
private void DisableMaxmizebox(bool isDisable)
{
int GWL_STYLE = -16;
int WS_MAXIMIZEBOX = 0x00010000;
int SWP_NOSIZE = 0x0001;
int SWP_NOMOVE = 0x0002;
int SWP_FRAMECHANGED = 0x0020;
int WS_CLIPSIBLINGS = 0x04000000;
IntPtr handle = new WindowInteropHelper(this).Handle;
int nStyle = GetWindowLong(handle, GWL_STYLE);
if (isDisable)
{
nStyle &= ~(WS_MAXIMIZEBOX);
}
else
{
nStyle |= WS_MAXIMIZEBOX;
}
SetWindowLong(handle, GWL_STYLE, nStyle);
SetWindowPos(handle, IntPtr.Zero, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_FRAMECHANGED);
}
private void ShellWindow_OnKeyDown(object sender, KeyEventArgs e)
{
if (e.Key != Key.Escape)
{
e.Handled = false;
return;
}
this.Close();
e.Handled = true;
}
Point pos = new Point();
private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
this.Focus();
}
bool bAllowDragMoveFlag = false;
public void SetEvent(Point cur)
{
pos = cur;
this.Owner.PreviewMouseMove -= Owner_PreviewMouseMove;
this.Owner.PreviewMouseMove += Owner_PreviewMouseMove;
this.Owner.PreviewMouseLeftButtonUp -= Owner_PreviewMouseLeftButtonUp;
this.Owner.PreviewMouseLeftButtonUp += Owner_PreviewMouseLeftButtonUp;
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
pos = e.GetPosition(this);
if (pos.Y >= 0 && pos.Y <= 70)
{
this.Owner.PreviewMouseMove -= Owner_PreviewMouseMove;
this.Owner.PreviewMouseMove += Owner_PreviewMouseMove;
this.Owner.PreviewMouseLeftButtonUp -= Owner_PreviewMouseLeftButtonUp;
this.Owner.PreviewMouseLeftButtonUp += Owner_PreviewMouseLeftButtonUp;
bAllowDragMoveFlag = true;
}
else
{
bAllowDragMoveFlag = false;
}
pos = this.PointToScreen(pos);
}
private void Owner_PreviewMouseLeftButtonUp(object sender, System.Windows.Input.MouseEventArgs e)
{
this.Owner.PreviewMouseLeftButtonUp -= Owner_PreviewMouseLeftButtonUp;
this.Owner.PreviewMouseMove -= Owner_PreviewMouseMove;
bResizeFlag = false;
}
private void Owner_PreviewMouseMove(object sender, MouseEventArgs e)
{
if(e.LeftButton == MouseButtonState.Pressed)
{
if (bAllowDragMoveFlag)
{
Point cur = e.GetPosition(this.Owner);
cur = this.Owner.PointToScreen(cur);
cur = this.PointFromScreen(cur);
MoveWindow(e, cur);
return;
}
if (bResizeFlag)
{
Point cur = e.GetPosition(this.Owner);
cur = this.Owner.PointToScreen(cur);
cur = this.PointFromScreen(cur);
ReSizeWindow(e, cur);
}
}
}
private void ReSizeWindow(MouseEventArgs e, Point cur)
{
try {
if (e.LeftButton == MouseButtonState.Pressed)
{
if (bResizeFlag)
{
cur = this.PointToScreen(cur);
double x = cur.X - pos.X;
double y = cur.Y - pos.Y;
this.Width = this.ActualWidth + x;
this.Height = this.ActualHeight + y;
}
else
{
cur = this.PointToScreen(cur);
}
pos = cur;
}
else
{
cur = this.PointToScreen(cur);
pos = cur;
}
}
catch(Exception ex)
{
Console.WriteLine(ex.StackTrace);
}
}
private void MoveWindow(MouseEventArgs e,Point cur)
{
try {
if (e.LeftButton == MouseButtonState.Pressed)
{
if (bAllowDragMoveFlag)
{
cur = this.PointToScreen(cur);
double x = cur.X - pos.X;
double y = cur.Y - pos.Y;
if (this.Left + x >= -this.ActualWidth + 100 && this.Top + y >= -49)
{
this.Left += x;
this.Top += y;
}
}
else
{
cur = this.PointToScreen(cur);
}
pos = cur;
}
else
{
cur = this.PointToScreen(cur);
pos = cur;
}
}
catch(Exception ex)
{
Console.WriteLine(ex.StackTrace);
}
}
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
Point cur = e.GetPosition(this);
if (bAllowDragMoveFlag)
{
MoveWindow(e, cur);
return;
}
if(bResizeFlag)
{
ReSizeWindow(e, cur);
}
}
protected virtual void OnMouseMove(MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
/// MoveWindow(e);
}
protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
bAllowDragMoveFlag = false;
bResizeFlag = false;
this.Owner.PreviewMouseLeftButtonUp -= Owner_PreviewMouseLeftButtonUp;
this.Owner.PreviewMouseMove -= Owner_PreviewMouseMove;
base.OnPreviewMouseUp(e);
}
public bool IsHide { set; get; }
}