wpf HwndHost MouseMove事件在前一个元素MouseLeave事件之前
我们有一个Wpf应用程序,其中有一个Hwndhost元素,用于通过DirectX呈现3d内容。我们向客户端公开一个“Panel”接口,其中包含MouseEnter和MouseLeave事件。对于Hwndhost“面板”,由于win32没有WM_MouseEnter事件,因此当我们第一次向Hwndhost.WndProc接收WM_MOUSEMOVE事件时,我们模拟了一个MouseEnter事件。此外,对于HwndHost,我们通过TrackMouseEvent()请求WM_MOUSELEAVE事件,该事件模拟“panel”界面上的MOUSELEAVE事件 问题在于,当用户非常快速地将鼠标移动到HwndHost面板或从HwndHost面板移动鼠标时,我们会从鼠标移动到的面板接收enter事件,然后再接收鼠标移动到的面板的leave事件。如果源面板和目标面板都是wpf元素,则不会发生这种情况,仅当涉及hwndhost元素时。此外,如果这些HwndHost元素中有两个相邻,则会发生相同的行为,因此看起来win32没有按照消息发生的顺序发送消息 有人知道解决这个问题的方法吗?如果有办法让Win32按事件发生的顺序发送事件,那就太好了 下面是一个示例应用程序,它解决了将消息打印到调试器输出窗口的问题:wpf HwndHost MouseMove事件在前一个元素MouseLeave事件之前,wpf,mousemove,mouseenter,mouseleave,hwndhost,Wpf,Mousemove,Mouseenter,Mouseleave,Hwndhost,我们有一个Wpf应用程序,其中有一个Hwndhost元素,用于通过DirectX呈现3d内容。我们向客户端公开一个“Panel”接口,其中包含MouseEnter和MouseLeave事件。对于Hwndhost“面板”,由于win32没有WM_MouseEnter事件,因此当我们第一次向Hwndhost.WndProc接收WM_MOUSEMOVE事件时,我们模拟了一个MouseEnter事件。此外,对于HwndHost,我们通过TrackMouseEvent()请求WM_MOUSELEAVE事件
// App.xaml.cs
using System;
using System.Windows;
using System.Runtime.InteropServices;
namespace WpfHostingWin32Control
{
public partial class App : Application
{
[DllImport("comctl32.dll", EntryPoint = "InitCommonControls", CharSet = CharSet.Auto)]
public static extern void InitCommonControls();
private void ApplicationStartup(object sender, StartupEventArgs args)
{
InitCommonControls();
HostWindow host = new HostWindow();
host.InitializeComponent();
}
}
}
// App.xaml
<Application x:Class="WpfHostingWin32Control.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml"
Startup="ApplicationStartup">
</Application>
// HostWindow.xaml.cs
using System;
using System.Windows;
using System.Windows.Input;
namespace WpfHostingWin32Control
{
public partial class HostWindow : Window
{
WpfHostingWin32Control.ControlHost ctrlHost;
public HostWindow()
{
InitializeComponent();
txtbox1.MouseEnter += MouseEnterHandler;
txtbox1.MouseLeave += MouseLeaveHandler;
}
void MouseEnterHandler(object sender, MouseEventArgs e)
{
System.Diagnostics.Debug.WriteLine("Wpf MouseEnter");
}
void MouseLeaveHandler(object sender, MouseEventArgs e)
{
System.Diagnostics.Debug.WriteLine("Wpf MouseLeave");
}
private void On_UIReady(object sender, EventArgs e)
{
ctrlHost = new ControlHost(600, 600);
ControlHostElement.Child = ctrlHost;
}
}
}
// HostWindow.xaml
<Window x:Class="WpfHostingWin32Control.HostWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Name="mainWindow"
Width="1250"
Height="700"
Background="LightGreen"
Loaded="On_UIReady">
<StackPanel Margin="20" Orientation="Horizontal">
<Border Name="ControlHostElement" Width="600" Height="600"/>
<TextBox Margin="5,0,0,0" x:Name="txtbox1" Width="600" Height="600"/>
</StackPanel>
</Window>
// ControlHost.cs
using System;
using System.Windows;
using System.Windows.Interop;
using System.Runtime.InteropServices;
namespace WpfHostingWin32Control
{
public class ControlHost : HwndHost
{
IntPtr hwndHost;
int hostHeight, hostWidth;
bool m_MouseHasEntered;
public ControlHost(double height, double width)
{
hostHeight = (int)height;
hostWidth = (int)width;
}
protected override HandleRef BuildWindowCore(HandleRef hwndParent)
{
hwndHost = IntPtr.Zero;
hwndHost = CreateWindowEx(0, "listbox", "",WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 0,
hostWidth, hostHeight, hwndParent.Handle, IntPtr.Zero, IntPtr.Zero, 0);
return new HandleRef(this, hwndHost);
}
protected override IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case WM_MOUSEMOVE:
{
if (m_MouseHasEntered == false)
{
RequestMouesLeaveNotification();
m_MouseHasEntered = true;
System.Diagnostics.Debug.WriteLine("WM_MOUSEMOVE/ENTER");
}
}
break;
case WM_MOUSELEAVE:
{
m_MouseHasEntered = false;
System.Diagnostics.Debug.WriteLine("WM_MOUSELEAVE");
}
break;
}
handled = false;
return IntPtr.Zero;
}
private void RequestMouesLeaveNotification()
{
var tme = new TRACKMOUSEEVENT()
{
cbSize = (uint)Marshal.SizeOf(typeof(TRACKMOUSEEVENT)),
dwFlags = TME_LEAVE,
hwndTrack = hwndHost,
dwHoverTime = 0
};
if (!TrackMouseEvent(out tme))
System.Diagnostics.Debug.WriteLine("TrackMouseEvent failed!");
}
protected override void DestroyWindowCore(HandleRef hwnd)
{
DestroyWindow(hwnd.Handle);
}
//PInvoke declarations
[DllImport("user32.dll", EntryPoint = "CreateWindowEx", CharSet = CharSet.Unicode)]
internal static extern IntPtr CreateWindowEx(int dwExStyle,
string lpszClassName,
string lpszWindowName,
int style,
int x, int y,
int width, int height,
IntPtr hwndParent,
IntPtr hMenu,
IntPtr hInst,
[MarshalAs(UnmanagedType.AsAny)] object pvParam);
[DllImport("user32.dll", EntryPoint = "DestroyWindow", CharSet = CharSet.Unicode)]
internal static extern bool DestroyWindow(IntPtr hwnd);
private const int WM_MOUSEMOVE = 0x0200;
private const int WM_MOUSELEAVE = 0x02A3;
private const int TME_LEAVE = 0x00000002;
private const int WS_CHILD = 0x40000000;
private const int WS_VISIBLE = 0x10000000;
private const int WS_BORDER = 0x00800000;
[StructLayout(LayoutKind.Sequential)]
private struct TRACKMOUSEEVENT
{
public uint cbSize;
public uint dwFlags;
public IntPtr hwndTrack;
public uint dwHoverTime;
}
[DllImport("user32.dll")]
private static extern bool TrackMouseEvent(out TRACKMOUSEEVENT tme);
}
}
//App.xaml.cs
使用制度;
使用System.Windows;
使用System.Runtime.InteropServices;
命名空间WpfHostingWin32Control
{
公共部分类应用程序:应用程序
{
[DllImport(“comctl32.dll”,EntryPoint=“InitCommonControls”,CharSet=CharSet.Auto)]
public static extern void InitCommonControls();
私有void应用程序启动(对象发送方、StartupEventArgs args args)
{
InitCommonControls();
HostWindow主机=新的HostWindow();
host.InitializeComponent();
}
}
}
//App.xaml
//HostWindow.xaml.cs
使用制度;
使用System.Windows;
使用System.Windows.Input;
命名空间WpfHostingWin32Control
{
公共部分类主机窗口:窗口
{
WpfHostingWin32Control.ControlHost ctrlHost;
公共主机窗口()
{
初始化组件();
txtbox1.MouseEnter+=MouseEnterHandler;
txtbox1.MouseLeave+=MouseLeaveHandler;
}
void MouseEnterHandler(对象发送器,MouseEventArgs e)
{
系统、诊断、调试、写入线(“Wpf鼠标器”);
}
void MouseLeaveHandler(对象发送器,MouseEventArgs e)
{
系统。诊断。调试。写线(“Wpf MouseLeave”);
}
_UIReady上的私有无效(对象发送方,事件参数e)
{
ctrlHost=新的控制主机(600600);
ControlHostElement.Child=ctrlHost;
}
}
}
//HostWindow.xaml
//ControlHost.cs
使用制度;
使用System.Windows;
使用System.Windows.Interop;
使用System.Runtime.InteropServices;
命名空间WpfHostingWin32Control
{
公共类控制主机:HwndHost
{
IntPtr-hwndHost;
int主机高度,主机宽度;
布尔m_鼠心;
公共控制主机(双高、双宽)
{
主机高度=(int)高度;
主机宽度=(int)宽度;
}
受保护的覆盖HandleRef BuildWindowCore(HandleRef hwndParent)
{
hwndHost=IntPtr.Zero;
hwndHost=CreateWindowEx(0,“listbox”,“”,WS|u子项| WS|u可见| WS|u边框,0,0,
hostWidth、hostHeight、hwndpresent.Handle、IntPtr.Zero、IntPtr.Zero、0);
返回新的HandleRef(此,hwndHost);
}
受保护的覆盖IntPtr WndProc(IntPtr hwnd、int msg、IntPtr wParam、IntPtr lParam、ref bool HANDED)
{
开关(msg)
{
案例WM_MOUSEMOVE:
{
if(m_MouseHasEntered==false)
{
RequestMouesLeaveNotification();
m_MouseHasEntered=真;
System.Diagnostics.Debug.WriteLine(“WM_MOUSEMOVE/ENTER”);
}
}
打破
案例WM_MOUSELEAVE:
{
m_MouseHasEntered=假;
系统、诊断、调试、写线(“WM_MOUSELEAVE”);
}
打破
}
已处理=错误;
返回IntPtr.Zero;
}
私有void RequestMouesLeaveNotification()
{
var tme=new TRACKMOUSEEVENT()
{
cbSize=(uint)Marshal.SizeOf(typeof(TRACKMOUSEEVENT)),
dwFlags=TME_离开,
HwnTrack=hwndHost,
dwHoverTime=0
};
如果(!TrackMouseeEvent(输出tme))
System.Diagnostics.Debug.WriteLine(“TrackMouseeEvent失败!”);
}
WindowCore的受保护覆盖(HandleRef hwnd)
{
车窗(带把手);
}
//平沃克宣言
[DllImport(“user32.dll”,EntryPoint=“CreateWindowEx”,CharSet=CharSet.Unicode)]
内部静态外部IntPtr CreateWindowEx(int dwExStyle,
字符串lpszClassName,
字符串lpszWindowName,
int风格,
int x,int y,
整数宽度,整数高度,
IntPtr hwndParent,
国际华努,
IntPtr hInst,