[英]Hosting WPF UserControl in Win32 application using HwndSource
我需要通過Handle在其他窗口中托管我的WPF UserControl。 我試過使用HwndSource:
var userControl = new MyUserControl();
var parameters = new HwndSourceParameters();
parameters.WindowStyle = 0x10000000 | 0x40000000;
parameters.SetPosition(5, 5);
parameters.SetSize(300, 300);
parameters.ParentWindow = parentWindowHwnd;
var src = new HwndSource(parameters);
src.RootVisual = userControl;
但在這種情況下,箭頭和標簽鍵不起作用。
如果我使用ElementHost一切正常:
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
var userControl = new UserControl1();
var elementHost = new ElementHost();
elementHost.Child = userControl;
elementHost.Left = 5;
elementHost.Top = 5;
elementHost.Width = 300;
elementHost.Height = 300;
SetParent(elementHost.Handle, parentWindowHwnd);
如何使用HwndSource獲得完整功能?
當您使用HwndSource時,您必須為Windows消息注冊處理程序。
這可以通過電話來完成:
src.AddHook(this.messageHook);
鈎子必須檢查wm_getdlgcode消息。
private IntPtr messageHook(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam, ref bool handled)
{
switch (msg)
{
case WmGetDlgCode:
{
handled = true;
return (IntPtr)(DlgcWantChars | DlgcWantTab | DlgcWantArrows | DlgcWantAllKeys);
}
}
return IntPtr.Zero;
}
通過Dlgc_WantChars,Dlgc_WantTab,Dlgc_WantArrows和Dlgc_WantAllKeys返回您需要的內容。
檢查此消息和代碼: http : //msdn.microsoft.com/en-us/library/windows/desktop/ms645425(v = vs.85).aspx
private const int WmGetDlgCode = 0x0087;
private const int DlgcWantChars = 0x0080;
private const int DlgcWantTab = 0x0002;
private const int DlgcWantAllKeys = 0x0004;
private const int DlgcWantArrows = 0x0001;
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