HResult INiIsolationClient.PreProcessMessage(ref NiMessage message, out PreProcessMessageResult preProcessMessageResult)
{
preProcessMessageResult = 0;
try
{
var result = HResult.False;
var target = FindTarget(message.HWnd);
if (target != null)
{
Message msg = message;
result = target.PreProcessMessage(ref msg) ? HResult.OK : HResult.False;
message = msg;
if (ControlStubs.ControlGetState2(target, ControlStubs.STATE2_INPUTKEY))
{
preProcessMessageResult |= PreProcessMessageResult.IsInputKey;
}
if (ControlStubs.ControlGetState2(target, ControlStubs.STATE2_INPUTCHAR))
{
preProcessMessageResult |= PreProcessMessageResult.IsInputChar;
}
}
return(result);
}
catch (Exception ex)
{
return(ErrorUtil.GetHResult(ex));
}
}
protected override void Select(bool directed, bool forward)
{
if (_select > 0)
{
return;
}
_select++;
try
{
// We were the target of select next control. Forward the
// call to the isolation client which does its search. If it
// matches a control, we need to make ourselves active.
if (ErrorUtil.ThrowOnFailure(_window.SelectNextControl(!directed || forward)))
{
base.Select(directed, forward);
return;
}
// If the client wasn't able to select something, we continue the
// search from here. One small detail is that SelectNextControl
// does not match itself. When it would match an IsolationClient,
// this would mean that the search does not go into the
// IsolationHost. We specifically match this case by first doing
// a non-wrapping search and matching the root for IsolationClient.
// If that matches, we allow the IsolationClient to continue
// the search upwards. Otherwise, we continue the search
// from the root as usual.
var root = ControlUtil.GetRoot(this);
if (root.SelectNextControl(this, !directed || forward, true, true, !(root is NiIsolationClient)))
{
return;
}
if (root is NiIsolationClient)
{
ControlStubs.ControlSelect(root, directed, forward);
}
}
finally
{
_select--;
}
}
public override bool PreProcessMessage(ref Message msg)
{
NiMessage message = msg;
PreProcessMessageResult preProcessMessageResult;
bool processed = ErrorUtil.ThrowOnFailure(_window.PreProcessMessage(ref message, out preProcessMessageResult));
msg = message;
ControlStubs.ControlSetState2(
this,
ControlStubs.STATE2_INPUTKEY,
(preProcessMessageResult & PreProcessMessageResult.IsInputKey) != 0
);
ControlStubs.ControlSetState2(
this,
ControlStubs.STATE2_INPUTCHAR,
(preProcessMessageResult & PreProcessMessageResult.IsInputChar) != 0
);
return(processed);
}
HResult INiIsolationClient.PreviewKeyDown(Keys keyData)
{
try
{
var result = HResult.False;
var target = FindTarget(NativeMethods.GetFocus());
if (target != null)
{
var e = new PreviewKeyDownEventArgs(keyData);
ControlStubs.ControlOnPreviewKeyDown(target, e);
result = e.IsInputKey ? HResult.OK : HResult.False;
}
return(result);
}
catch (Exception ex)
{
return(ErrorUtil.GetHResult(ex));
}
}
