public bool OnMnemonic(ref MSG msg, ModifierKeys modifiers)
{
switch (msg.message)
{
case 260:
case 262:
case 263:
string key = new string((char)(int)msg.wParam, 1);
if (key.Length > 0)
{
IntPtr hwnd = new WindowInteropHelper(Window).Owner;
if (hwnd == IntPtr.Zero)
{
var fromVisual = (HwndSource)PresentationSource.FromVisual(Application.Current.MainWindow);
if (fromVisual != null)
{
hwnd = fromVisual.Handle;
}
}
if (hwnd != IntPtr.Zero)
{
HwndSource hwndSource = HwndSource.FromHwnd(hwnd);
if (hwndSource != null && AccessKeyManager.IsKeyRegistered(hwndSource, key))
{
AccessKeyManager.ProcessKey(hwndSource, key, false);
return(true);
}
}
}
break;
}
return(false);
}
public void AccessKeyManagerTest()
{
SimpleButtonBase b = new SimpleButtonBase();
Assert.IsFalse(AccessKeyManager.IsKeyRegistered(null, "1"), "Before");
b.Content = "_1";
Assert.IsFalse(AccessKeyManager.IsKeyRegistered(null, "1"), "After");
}
/// <summary>
/// This is overridden to pass hot keys on to the contained user control.
/// </summary>
/// <param name="m">The message to pre-process</param>
/// <returns>True if the message was handled, false if not</returns>
/// <remarks>When a WPF user control is hosted in a docked tool window, the hot keys no longer work.
/// This works around the problem by manually seeing if the control makes use of the hot key, and if
/// it does, processing it here.</remarks>
protected override bool PreProcessMessage(ref System.Windows.Forms.Message m)
{
if (m.Msg == 0x0100 /* WM_KEYDOWN */)
{
System.Windows.Forms.Keys keyCode = (System.Windows.Forms.Keys)m.WParam &
System.Windows.Forms.Keys.KeyCode;
if (keyCode == System.Windows.Forms.Keys.F1)
{
ApplicationCommands.Help.Execute(null, (UserControl)base.Content);
return(true);
}
}
if (m.Msg == 0x0104 /* WM_SYSKEYDOWN */)
{
if (Keyboard.IsKeyDown(Key.LeftAlt) || Keyboard.IsKeyDown(Key.RightAlt))
{
// Cache a copy of the scope on first use
if (scope == null && base.Content != null)
{
// Get the scope for handling hot keys. The key used here doesn't matter. We're just
// getting the scope to use.
AccessKeyPressedEventArgs e = new AccessKeyPressedEventArgs("X");
((UserControl)base.Content).RaiseEvent(e);
scope = e.Scope;
}
string key = ((char)m.WParam).ToString();
// See if the hot key is registered for the control. If so, handle it. Ignore anything
// that isn't 'A' to 'Z'
if (scope != null && key[0] >= 'A' && key[0] <= 'Z' && AccessKeyManager.IsKeyRegistered(scope, key))
{
AccessKeyManager.ProcessKey(scope, key, false);
return(true);
}
}
}
return(base.PreProcessMessage(ref m));
}
bool System.Windows.Interop.IKeyboardInputSink.OnMnemonic(ref MSG msg, ModifierKeys modifiers)
{
switch (msg.message)
{
case 262:
case 263:
{
string str = new string((char)((int)msg.wParam), 1);
if (str == null || str.Length <= 0)
{
break;
}
IntPtr owner = (new WindowInteropHelper(this.Window)).Owner;
HwndSource hwndSource = HwndSource.FromHwnd(owner);
if (hwndSource == null || !AccessKeyManager.IsKeyRegistered(hwndSource, str))
{
break;
}
AccessKeyManager.ProcessKey(hwndSource, str, false);
return(true);
}
}
return(false);
}