//=========================================================================================
/// <summary>
/// Chooses the current widget that is to be in focus. Picks the first widget that has the
/// 'DefaultFocus' flag set to true, or if that fails the first focusable widget.
/// </summary>
//=========================================================================================
private void ChooseFocusWidget()
{
// Lock the objects list:
m_data.Lock();
// Clear the current focus widget:
m_focus_widget = null;
// Run through the list of widgets and try to find a default focus one:
Dictionary<int,GuiWidget>.Enumerator e = m_data.Objects.GetEnumerator();
while ( e.MoveNext() )
{
// See if this is a default focus widget:
if ( e.Current.Value.DefaultFocus )
{
// Found our focus widget: set
m_focus_widget = e.Current.Value;
// Call the gained focus event:
m_focus_widget.OnFocusGained();
// Abort search
m_data.Unlock(); return;
}
}
// Ok: run through the list of widgets that can have focus and try to pick one
e = m_data.Objects.GetEnumerator();
while ( e.MoveNext() )
{
// See if this is a default focus widget:
if ( e.Current.Value.CanFocus )
{
// Found our focus widget: set
m_focus_widget = e.Current.Value;
// Call the gained focus event:
m_focus_widget.OnFocusGained();
// Abort search
m_data.Unlock(); return;
}
}
// Unlock the objects list:
m_data.Unlock();
}
//=========================================================================================
/// <summary>
/// Makes focus shift in the direction specified if allowed.
/// </summary>
//=========================================================================================
public void TraverseFocus( FocusTraversalDirection direction )
{
// See if there is a focus widget: we can do nowt if there is none
if ( m_focus_widget != null )
{
// Ok: see what direction we have to move in
switch ( direction )
{
// Move focus to the left:
case FocusTraversalDirection.LEFT:
{
// Try to find the next widget to focus on:
GuiWidget next_focus_widget = m_search.FindByName( m_focus_widget.LeftWidget );
// If found then switch focus:
if ( next_focus_widget != null )
{
// Switch focus:
m_focus_widget.OnFocusLost(); m_focus_widget = next_focus_widget;
// Call focus gained on new widget:
m_focus_widget.OnFocusGained();
}
} break;
case FocusTraversalDirection.RIGHT:
{
// Try to find the next widget to focus on:
GuiWidget next_focus_widget = m_search.FindByName( m_focus_widget.RightWidget );
// If found then switch focus:
if ( next_focus_widget != null )
{
// Switch focus:
m_focus_widget.OnFocusLost(); m_focus_widget = next_focus_widget;
// Call focus gained on new widget:
m_focus_widget.OnFocusGained();
}
} break;
case FocusTraversalDirection.ABOVE:
{
// Try to find the next widget to focus on:
GuiWidget next_focus_widget = m_search.FindByName( m_focus_widget.AboveWidget );
// If found then switch focus:
if ( next_focus_widget != null )
{
// Switch focus:
m_focus_widget.OnFocusLost(); m_focus_widget = next_focus_widget;
// Call focus gained on new widget:
m_focus_widget.OnFocusGained();
}
} break;
case FocusTraversalDirection.BELOW:
{
// Try to find the next widget to focus on:
GuiWidget next_focus_widget = m_search.FindByName( m_focus_widget.BelowWidget );
// If found then switch focus:
if ( next_focus_widget != null )
{
// Switch focus:
m_focus_widget.OnFocusLost(); m_focus_widget = next_focus_widget;
// Call focus gained on new widget:
m_focus_widget.OnFocusGained();
}
} break;
} // end switch ( direction )
}
}
