private bool AssignActiveControlInternal(Control value)
{
Debug.Assert(value == null || (value.ParentInternal != null &&
this == value.ParentInternal.GetContainerControlInternal()));
if (activeControl != value)
{
// cpb: #7318
#if FALSE
if (activeControl != null)
{
AxHost.Container cont = FindAxContainer();
if (cont != null)
{
cont.OnOldActiveControl(activeControl, value);
}
}
#endif
activeControl = value;
UpdateFocusedControl();
if (activeControl == value)
{
// cpb: #7318
#if FALSE
AxHost.Container cont = FindAxContainer();
if (cont != null)
{
cont.OnNewActiveControl(value);
}
#endif
Form form = FindFormInternal();
if (form != null)
{
form.UpdateDefaultButton();
}
}
}
return(activeControl == value);
}
private bool SetActiveControl(Control value)
{
if (activeControl == value)
{
return(true);
}
activeControl = value;
if (!validating && unvalidatedControl == null)
{
// Set the unvalidatedControl to outermost active control.
// Start with the focused control.
unvalidatedControl = focusedControl;
while (true)
{
ContainerControl c = unvalidatedControl as ContainerControl;
if (c == null || c.activeControl == null)
{
break;
}
unvalidatedControl = c.activeControl;
}
}
// Go through the hierarchy, doing the leave and enter events, as we change active control.
Control currentFocusedControl = focusedControl;
ReDo:
while (activeControl != currentFocusedControl)
{
if (currentFocusedControl == null || IsParent(currentFocusedControl, activeControl))
{
Control currentActiveControl = activeControl;
while (true)
{
Control parent = currentActiveControl.Parent;
// Find which is lower in the hierarchy (which comes first), the active Control or the focused Control.
// Set the focus to this if validated.
if (parent == this || parent == currentFocusedControl)
{
Control prevFocusedControl = focusedControl = currentFocusedControl;
ValidateEnter(currentActiveControl);
if (focusedControl != prevFocusedControl)
{
currentFocusedControl = focusedControl;
}
else
{
currentFocusedControl = currentActiveControl;
try
{
currentFocusedControl.DoEnter();
}
catch (Exception e)
{
Application.OnThreadException(e);
}
}
goto ReDo;
}
currentActiveControl = currentActiveControl.Parent;
}
}
// Find innermost focused container.
ContainerControl innerMostFocusedContainer = this;
while (innerMostFocusedContainer.focusedControl is ContainerControl)
{
innerMostFocusedContainer = innerMostFocusedContainer.focusedControl as ContainerControl;
}
// Reset the focusedControl and activeControl of the innermost container.
Control highestResetControl = null;
if (innerMostFocusedContainer.focusedControl == null)
{
// The container has the focus set.
currentFocusedControl = innerMostFocusedContainer;
if (innerMostFocusedContainer.Parent != null)
{
// Remove the active control and focused control of this containers container.
ContainerControl parentContainer = innerMostFocusedContainer.Parent.GetContainerControl() as ContainerControl;
highestResetControl = parentContainer;
if (parentContainer != null && parentContainer != this)
{
parentContainer.activeControl = null;
parentContainer.focusedControl = null;
}
}
}
else
{
// There is a focused control of the innermost container.
currentFocusedControl = innerMostFocusedContainer.focusedControl;
highestResetControl = innerMostFocusedContainer;
if (innerMostFocusedContainer != this)
{
innerMostFocusedContainer.focusedControl = null;
if (innerMostFocusedContainer.Parent == null || !(innerMostFocusedContainer.Parent is MdiClient))
{
innerMostFocusedContainer.activeControl = null;
}
}
}
// Do all the leave events up the hierarchy.
do
{
Control prevFocusedControl = currentFocusedControl;
if (currentFocusedControl != null)
{
currentFocusedControl = currentFocusedControl.Parent;
}
if (currentFocusedControl == this)
{
currentFocusedControl = null;
}
if (prevFocusedControl != null)
{
try
{
prevFocusedControl.DoLeave();
}
catch (Exception e)
{
Application.OnThreadException(e);
}
}
}while (currentFocusedControl != null && currentFocusedControl != highestResetControl && !IsParent(currentFocusedControl, activeControl));
}
focusedControl = activeControl;
if (activeControl != null)
{
ValidateEnter(activeControl);
}
if (activeControl == value)
{
Form form = FindForm();
if (form != null)
{
form.UpdateDefaultButton();
}
}
return(activeControl == value);
}
