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1.0beta

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liufei
2021-04-13 15:26:19 +08:00
parent cc399e2ef7
commit 5f38782623
26 changed files with 1778 additions and 1787 deletions
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88
Util/MouseUtilities.cs
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@@ -1,58 +1,56 @@
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Media;
namespace WPF.JoshSmith.Controls.Utilities
{
/// <summary>
/// Provides access to the mouse location by calling unmanaged code.
/// </summary>
/// <remarks>
/// This class was written by Dan Crevier (Microsoft).
/// http://blogs.msdn.com/llobo/archive/2006/09/06/Scrolling-Scrollviewer-on-Mouse-Drag-at-the-boundaries.aspx
/// </remarks>
public class MouseUtilities
{
[StructLayout( LayoutKind.Sequential )]
private struct Win32Point
{
public Int32 X;
public Int32 Y;
};
/// <summary>
/// Provides access to the mouse location by calling unmanaged code.
/// </summary>
/// <remarks>
/// This class was written by Dan Crevier (Microsoft).
/// http://blogs.msdn.com/llobo/archive/2006/09/06/Scrolling-Scrollviewer-on-Mouse-Drag-at-the-boundaries.aspx
/// </remarks>
public class MouseUtilities
{
[StructLayout(LayoutKind.Sequential)]
private struct Win32Point
{
public Int32 X;
public Int32 Y;
};
[DllImport( "user32.dll" )]
private static extern bool GetCursorPos( ref Win32Point pt );
[DllImport("user32.dll")]
private static extern bool GetCursorPos(ref Win32Point pt);
[DllImport( "user32.dll" )]
private static extern bool ScreenToClient( IntPtr hwnd, ref Win32Point pt );
[DllImport("user32.dll")]
private static extern bool ScreenToClient(IntPtr hwnd, ref Win32Point pt);
/// <summary>
/// Returns the mouse cursor location. This method is necessary during
/// a drag-drop operation because the WPF mechanisms for retrieving the
/// cursor coordinates are unreliable.
/// </summary>
/// <param name="relativeTo">The Visual to which the mouse coordinates will be relative.</param>
public static Point GetMousePosition( Visual relativeTo )
{
Win32Point mouse = new Win32Point();
GetCursorPos( ref mouse );
/// <summary>
/// Returns the mouse cursor location. This method is necessary during
/// a drag-drop operation because the WPF mechanisms for retrieving the
/// cursor coordinates are unreliable.
/// </summary>
/// <param name="relativeTo">The Visual to which the mouse coordinates will be relative.</param>
public static Point GetMousePosition(Visual relativeTo)
{
Win32Point mouse = new Win32Point();
GetCursorPos(ref mouse);
// Using PointFromScreen instead of Dan Crevier's code (commented out below)
// is a bug fix created by William J. Roberts. Read his comments about the fix
// here: http://www.codeproject.com/useritems/ListViewDragDropManager.asp?msg=1911611#xx1911611xx
return relativeTo.PointFromScreen( new Point( (double)mouse.X, (double)mouse.Y ) );
// Using PointFromScreen instead of Dan Crevier's code (commented out below)
// is a bug fix created by William J. Roberts. Read his comments about the fix
// here: http://www.codeproject.com/useritems/ListViewDragDropManager.asp?msg=1911611#xx1911611xx
return relativeTo.PointFromScreen(new Point((double)mouse.X, (double)mouse.Y));
#region Commented Out
//System.Windows.Interop.HwndSource presentationSource =
// (System.Windows.Interop.HwndSource)PresentationSource.FromVisual( relativeTo );
//ScreenToClient( presentationSource.Handle, ref mouse );
//GeneralTransform transform = relativeTo.TransformToAncestor( presentationSource.RootVisual );
//Point offset = transform.Transform( new Point( 0, 0 ) );
//return new Point( mouse.X - offset.X, mouse.Y - offset.Y );
#endregion // Commented Out
}
}
#region Commented Out
//System.Windows.Interop.HwndSource presentationSource =
// (System.Windows.Interop.HwndSource)PresentationSource.FromVisual( relativeTo );
//ScreenToClient( presentationSource.Handle, ref mouse );
//GeneralTransform transform = relativeTo.TransformToAncestor( presentationSource.RootVisual );
//Point offset = transform.Transform( new Point( 0, 0 ) );
//return new Point( mouse.X - offset.X, mouse.Y - offset.Y );
#endregion // Commented Out
}
}
}