private void CompletionWindowOnWndProcMessage(ref Message m, HandledEventArgs args)
{
WindowMessage msg = m;
// Ensure that dialog keys get sent to the window
if (msg.Is(WindowMessageType.WM_GETDLGCODE))
{
switch (msg.WParamInt64Value)
{
case VirtualKey.VK_TAB:
case VirtualKey.VK_RETURN:
case VirtualKey.VK_ESCAPE:
case VirtualKey.VK_SPACE:
case VirtualKey.VK_LEFT:
case VirtualKey.VK_UP:
case VirtualKey.VK_RIGHT:
case VirtualKey.VK_DOWN:
{
// Tell Windows that we want to receive WM_KEYDOWN messages for dialog keys when the scrollbar is focused.
// ElementHost.EnableModelessKeyboardInterop() already handles this when all other elements are focused,
// but for some reason if the user clicks on the scrollbar or scrolls with the mouse wheel
// WM_KEYDOWN messages don't get sent.
args.Handled = true;
m.Result = new IntPtr(DialogCode.DLGC_WANTMESSAGE);
return;
}
}
}
// Ensure that focus is always on something that is listening for keyboard input
if (msg.Is(WindowMessageType.WM_MOUSEWHEEL))
{
_mouseWheelThrottle.Reset();
}
if (msg.Is(WindowMessageType.WM_LBUTTONDOWN) ||
msg.Is(WindowMessageType.WM_MBUTTONDOWN) ||
msg.Is(WindowMessageType.WM_RBUTTONDOWN))
{
_editor.Focus();
return;
}
if (msg.Is(WindowMessageType.WM_LBUTTONUP) ||
msg.Is(WindowMessageType.WM_MBUTTONUP) ||
msg.Is(WindowMessageType.WM_RBUTTONUP))
{
_editor.Focus();
return;
}
}
