private GLBaseControl mousedowninitialcontrol = null; // track where mouse down occurred
private bool SetFocus(GLBaseControl newfocus) // null to clear focus, true if focus taken
{
if (newfocus == currentfocus) // no action if the same
{
return(true);
}
if (newfocus != null)
{
if (newfocus.GiveFocusToParent && newfocus.Parent != null && newfocus.Parent.RejectFocus == false)
{
newfocus = newfocus.Parent; // see if we want to give it to parent
}
if (newfocus.RejectFocus) // if reject focus change when clicked, abort, do not change focus
{
return(false);
}
if (!newfocus.Enabled || !newfocus.Focusable) // if its not enabled or not focusable, change to no focus
{
//System.Diagnostics.Debug.WriteLine("Focus target not enabled/focusable " + newfocus.Name);
newfocus = null;
}
}
GLBaseControl oldfocus = currentfocus;
OnGlobalFocusChanged(oldfocus, newfocus);
// System.Diagnostics.Debug.WriteLine("Focus changed from '{0}' to '{1}' {2}", oldfocus?.Name, newfocus?.Name, Environment.StackTrace);
if (currentfocus != null) // if we have a focus, inform losing it, and cancel it
{
currentfocus.OnFocusChanged(FocusEvent.Deactive, newfocus);
for (var c = currentfocus.Parent; c != null; c = c.Parent) // inform change up and including the GLForm
{
c.OnFocusChanged(FocusEvent.ChildDeactive, newfocus);
if (c is GLForm)
{
break;
}
}
currentfocus = null;
}
if (newfocus != null) // if we have a new focus, set and tell it
{
currentfocus = newfocus;
currentfocus.OnFocusChanged(FocusEvent.Focused, oldfocus);
for (var c = currentfocus.Parent; c != null; c = c.Parent) // inform change up and including the GLForm
{
c.OnFocusChanged(FocusEvent.ChildFocused, currentfocus);
if (c is GLForm)
{
break;
}
}
}
return(true);
}