C# 获取WPF中窗口的实际位置
如何获取WPF窗口的真实位置(以像素为单位)C# 获取WPF中窗口的实际位置,c#,wpf,C#,Wpf,如何获取WPF窗口的真实位置(以像素为单位) this.PointFromScreen(新点(0,0))不会给出屏幕上的实际位置。我想这与缩放有关,但在我的例子中,我需要屏幕上的“真实”位置 我想你想要PointFromScreen将屏幕坐标转换为Visual的坐标系 var window = new Window(); Point screenCoordinates = window.PointToScreen(new Point(0,0)); 我有这段代码,但老实说,我不记得是否至少使用
this.PointFromScreen(新点(0,0))当我使用150%的DPI作为字体时,代码>不会给出屏幕上的实际位置。我想这与缩放有关,但在我的例子中,我需要屏幕上的“真实”位置 我想你想要PointFromScreen
将屏幕坐标转换为Visual
的坐标系
var window = new Window();
Point screenCoordinates = window.PointToScreen(new Point(0,0));
我有这段代码,但老实说,我不记得是否至少使用过一次。我相信它应该“体面地”工作
顺便说一句,我想知道你为什么需要类似的信息
[StructLayout(LayoutKind.Sequential)]
private struct POINT
{
public int X;
public int Y;
}
/// <summary>
/// The ClientToScreen function converts the client-area coordinates of a specified point to screen coordinates.
/// </summary>
/// <param name="hWnd">Handle to the window whose client area is used for the conversion.</param>
/// <param name="pt">Pointer to a POINT structure that contains the client coordinates to be converted. The new screen coordinates are copied into this structure if the function succeeds.</param>
/// <returns>If the function succeeds, the return value is nonzero.</returns>
[DllImport("User32", EntryPoint = "ClientToScreen", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool ClientToScreen(
IntPtr hWnd,
ref POINT pt);
/// <summary>
/// Code for getting screen relative Position in WPF
/// </summary>
/// <param name="point">The source point to be trasnformed</param>
/// <param name="relativeTo">The Visual object used as reference</param>
/// <returns>The screen-relative point obtained by the trasformation</returns>
/// <remarks>
/// http://blogs.msdn.com/llobo/archive/2006/05/02/Code-for-getting-screen-relative-Position-in-WPF.aspx
/// One of the common customer queries that we see on the forums
/// is to get the screen relative position of a point.
/// Currently we do not provide an API which allows this functionality.
/// However, Nick Kramer came up with this code on the forum
/// and it works great for LTR (left to right) systems.
/// Following is the code for getting the screen relative position.
/// </remarks>
[EnvironmentPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
public static Point? TransformToScreen(
Point point,
Visual relativeTo)
{
// Translate the point from the visual to the root.
var hwndSource = PresentationSource.FromVisual(relativeTo) as HwndSource;
if (hwndSource == null)
return null;
var root = hwndSource.RootVisual;
// Transform the point from the root to client coordinates.
var transformToRoot = relativeTo.TransformToAncestor(root);
var pointRoot = transformToRoot.Transform(point);
var m = Matrix.Identity;
var transform = VisualTreeHelper.GetTransform(root);
if (transform != null)
{
m = Matrix.Multiply(m, transform.Value);
}
// Convert from “device-independent pixels” into pixels.
var offset = VisualTreeHelper.GetOffset(root);
m.Translate(offset.X, offset.Y);
var pointClient = m.Transform(pointRoot);
pointClient = hwndSource.CompositionTarget.TransformToDevice.Transform(pointClient);
var pointClientPixels = new POINT();
pointClientPixels.X = (0 < pointClient.X)
? (int)(pointClient.X + 0.5)
: (int)(pointClient.X - 0.5);
pointClientPixels.Y = (0 < pointClient.Y)
? (int)(pointClient.Y + 0.5)
: (int)(pointClient.Y - 0.5);
// Transform the point into screen coordinates.
var pointScreenPixels = pointClientPixels;
if (ClientToScreen(
hwndSource.Handle,
ref pointScreenPixels))
{
return new Point(
pointScreenPixels.X,
pointScreenPixels.Y);
}
else
{
return new Point();
}
}
[StructLayout(LayoutKind.Sequential)]
私有结构点
{
公共int X;
公共智力;
}
///
///ClientToScreen函数将指定点的客户端区域坐标转换为屏幕坐标。
///
///其客户端区域用于转换的窗口的句柄。
///指向包含要转换的客户端坐标的点结构的指针。如果函数成功,新的屏幕坐标将复制到此结构中。
///如果函数成功,则返回值为非零。
[DllImport(“User32”,EntryPoint=“ClientToScreen”,SetLastError=true,ExactSpelling=true,CharSet=CharSet.Auto)]
[返回:Marshallas(UnmanagedType.Bool)]
专用静态外部布尔客户端到屏幕(
IntPtr hWnd,
参考点(pt);
///
///获取WPF中屏幕相对位置的代码
///
///要传输的源点
///用作参考的可视对象
///通过转换获得的屏幕相对点
///
/// http://blogs.msdn.com/llobo/archive/2006/05/02/Code-for-getting-screen-relative-Position-in-WPF.aspx
///我们在论坛上看到的常见客户查询之一
///是获取屏幕上某一点的相对位置。
///目前,我们没有提供允许此功能的API。
///然而,Nick Kramer在论坛上提出了这个代码
///它对LTR(从左到右)系统非常有效。
///下面是获取屏幕相对位置的代码。
///
[EnvironmentPermissionAttribute(SecurityAction.LinkDemand,Unrestricted=true)]
公共静态点?转换屏幕(
点,点,
视觉相对论
{
//将点从视觉坐标系转换为根坐标系。
var hwndSource=PresentationSource.FromVisual(relativeTo)作为hwndSource;
if(hwndSource==null)
返回null;
var root=hwndSource.RootVisual;
//将点从根坐标转换为客户坐标。
var transformToRoot=相对于变压器电容器(根);
var pointRoot=transformToRoot.Transform(点);
var m=矩阵恒等式;
var transform=VisualTreeHelper.GetTransform(根);
如果(转换!=null)
{
m=矩阵乘法(m,变换值);
}
//将“设备独立像素”转换为像素。
var offset=visualtreeheloper.GetOffset(根);
m、 平移(偏移量X,偏移量Y);
var pointClient=m.Transform(pointRoot);
pointClient=hwndSource.CompositionTarget.TransformToDevice.Transform(pointClient);
var pointClientPixels=新点();
pointClientPixels.X=(0
另外,如果您打算全部使用“我更改了DPI”,我会问您的应用程序是什么?您的“DPI感知”是什么意思?默认情况下WPF DPI不知道吗?