我希望能够在 Windows 任务栏顶部执行镜头放大。到目前为止，由于任务栏将始终在我的窗口顶部打开，因此我未能成功实现此功能。Windows 内置放大镜能够做到这一点，所以我希望它确实是可能的。
我附上了两个屏幕截图，显示了 Windows 内置放大镜以及它如何放大任务栏以及我的应用程序将如何在任务栏下方呈现。
Windows 内置放大镜：
我的应用程序：
有什么方法可以让我的应用程序在任务栏上方呈现，从而放大任务栏？
<Window x:Class="WpfNativeTesting.MagnificationWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfNativeTesting"
mc:Ignorable="d"
Title="MagnificationWindow"
Height="400"
Width="400"
WindowStyle="None"
ResizeMode="NoResize"
AllowsTransparency="true"
ShowInTaskbar="False"
Topmost="True">
<Grid x:Name="ContainerGrid">
<Grid x:Name="MagnificationGrid" />
</Grid>
</Window>
public partial class MagnificationWindow : Window
{
private IntPtr HWnd;
private IntPtr HWndMag;
private bool MagnificationInitialized = false;
private DispatcherTimer Timer = new DispatcherTimer();
private RECT MagWindowRect = new RECT();
private bool IsColorEffectSet = false;
private float magnification = 1.0f;
public float Magnification
{
get { return magnification; }
set
{
if (value < 1.0f)
{
value = 1.0f;
}
if (HWndMag != null)
{
if (magnification != value)
{
magnification = value;
Transformation matrix = new Transformation(magnification);
NativeMethods.MagSetWindowTransform(HWndMag, ref matrix);
}
}
}
}
public MagnificationWindow()
{
InitializeComponent();
Loaded += MagnificationWindow_Loaded;
Show();
}
private void MagnificationWindow_Loaded(object sender, RoutedEventArgs e)
{
HWnd = new WindowInteropHelper(this).Handle;
var exStyle = NativeMethods.GetWindowLong(HWnd, NativeMethods.GWL_EXSTYLE);
exStyle |= (int)ExtendedWindowStyles.WS_EX_TOPMOST | (int)ExtendedWindowStyles.WS_EX_LAYERED | (int)ExtendedWindowStyles.WS_EX_TRANSPARENT;
NativeMethods.SetWindowLong(HWnd, NativeMethods.GWL_EXSTYLE, exStyle);
var style = NativeMethods.GetWindowLong(HWnd, NativeMethods.GWL_STYLE);
style |= (int)WindowStyles.WS_CAPTION | (int)WindowStyles.WS_SYSMENU;
NativeMethods.SetWindowLong(HWnd, NativeMethods.GWL_STYLE, exStyle);
MagnificationInitialized = NativeMethods.MagInitialize();
if (MagnificationInitialized)
{
SetupMagnifier();
Timer.Interval = TimeSpan.FromMilliseconds(NativeMethods.USER_TIMER_MINIMUM);
Timer.Tick += Timer_Tick;
Timer.Start();
}
}
protected override void OnClosing(CancelEventArgs e)
{
base.OnClosing(e);
RemoveMagnifier();
}
private void Timer_Tick(object sender, EventArgs e)
{
UpdateMaginifier();
}
private void SetupMagnifier()
{
var hInst = NativeMethods.GetModuleHandle(null);
NativeMethods.GetClientRect(HWnd, ref MagWindowRect);
HWndMag = NativeMethods.CreateWindow((int)ExtendedWindowStyles.WS_EX_STATICEDGE, NativeMethods.WC_MAGNIFIER,
"MagnificationWindow", (int)WindowStyles.WS_CHILD | (int)MagnifierStyle.MS_SHOWMAGNIFIEDCURSOR | (int)WindowStyles.WS_VISIBLE,
MagWindowRect.left, MagWindowRect.top, MagWindowRect.right, MagWindowRect.bottom, HWnd, IntPtr.Zero, hInst, IntPtr.Zero);
NativeMethods.MagShowSystemCursor(false);
if (HWndMag == IntPtr.Zero)
{
return;
}
var matrix = new Transformation(Magnification);
NativeMethods.MagSetWindowTransform(HWndMag, ref matrix);
}
private void UpdateMaginifier()
{
if (!MagnificationInitialized || HWndMag == IntPtr.Zero)
{
return;
}
POINT mousePoint = new POINT();
RECT sourceRect = new RECT();
NativeMethods.GetCursorPos(ref mousePoint);
int width = (int)((MagWindowRect.right - MagWindowRect.left) / Magnification);
int height = (int)((MagWindowRect.bottom - MagWindowRect.top) / Magnification);
sourceRect.left = mousePoint.x - width / 2;
sourceRect.top = mousePoint.y - height / 2;
NativeMethods.MagSetWindowSource(HWndMag, sourceRect);
POINT mouse = new POINT();
NativeMethods.GetCursorPos(ref mouse);
NativeMethods.SetWindowPos(HWnd, NativeMethods.HWND_TOPMOST, mouse.x - (int)(magnification * width / 2), mouse.y - (int)(magnification * height / 2), width, height,
(int)SetWindowPosFlags.SWP_NOACTIVATE |
(int)SetWindowPosFlags.SWP_NOSIZE);
NativeMethods.InvalidateRect(HWndMag, IntPtr.Zero, true);
}
public void RemoveMagnifier()
{
if (MagnificationInitialized)
{
NativeMethods.MagUninitialize();
MagnificationInitialized = false;
}
}
// ...
}