/// <summary>
/// Loads the view contained in the viewitem and
/// brings up the record associated with it.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public bool LoadViewItem(ViewItem item)
{
bool load_ok = true;
try
{
if (_view != null && _view != item.View && item.View != null)
{
/* need to swap views. Push current view
* onto the back stack, and clear the
* forward stack.*/
_view.Hide();
_back_viewstack.Push(_view);
_forward_viewstack.Clear();
_parent_form.BackButton.Enabled = true;
_parent_form.ForwardButton.Enabled = false;
}
if (item.View != null)
{
_view = item.View;
_activeform = _view.ViewedForm;
_view.Show(item);
}
}
catch (System.Exception ex)
{
_last_error = ex;
_errors.Add(ex);
load_ok = false;
}
return(load_ok);
}
/// <summary>
/// Moves to the previous view
/// on the back viewstack.
/// </summary>
/// <returns></returns>
public bool MovePrevView()
{
bool prev_ok = true;
try
{
if (_back_viewstack.Peek() != null)
{
/* hide current view and push it onto the
* forward view stack */
_view.Hide();
if (_view.AllowsForwardNavigation)
{
_forward_viewstack.Push(_view);
_parent_form.ForwardButton.Enabled = true;
}
else
{
_parent_form.ForwardButton.Enabled = false;
}
/*pop previous view off the back stack and
* show it */
_view = (Viewing.View)_back_viewstack.Pop();
_view.Show();
/*may need to switch app states... */
//if(_app_state == ApplicationState.Disposition)
// SwitchAppState(ApplicationStates.CallActive);
/*finally, update the navigation buttons */
if (_back_viewstack.Count == 0)
{
_parent_form.BackButton.Enabled = false;
}
else
{
_parent_form.BackButton.Enabled = true;
}
_activeform = _view.ViewedForm;
}
else
{
prev_ok = false;
}
}
catch (System.Exception ex)
{
_last_error = ex;
_errors.Add(ex);
prev_ok = false;
}
return(prev_ok);
}
/// <summary>
/// Loads the view with the default item
/// onto the screen.
/// </summary>
/// <param name="view"></param>
/// <returns></returns>
public bool LoadView(Viewing.View view)
{
if ((_view != null) && (_view != view))
{
_view.Hide();
_back_viewstack.Push(_view);
_parent_form.BackButton.Enabled = true;
_parent_form.ForwardButton.Enabled = false;
}
_view = view;
_activeform = _view.ViewedForm;
_view.Show();
return(true);
}
/// <summary>
/// Moves to the next view on the
/// forward stack.
/// </summary>
/// <returns></returns>
public bool MoveNextView()
{
bool next_ok = true;
try
{
if (_forward_viewstack.Peek() != null)
{
/* hide current view and push it onto the back stack */
_view.Hide();
_back_viewstack.Push(_view);
/* pop the next view off the forward stack and load it */
_view = (Viewing.View)_forward_viewstack.Pop();
_view.Show();
/* if there's nothing left in the forward stack,
* disable the "next" button.*/
if (_forward_viewstack.Count == 0)
{
_parent_form.ForwardButton.Enabled = false;
}
else
{
_parent_form.ForwardButton.Enabled = true;
}
_parent_form.BackButton.Enabled = true;
_activeform = _view.ViewedForm;
}
else
{
next_ok = false;
}
}
catch (System.Exception ex)
{
_last_error = ex;
_errors.Add(ex);
next_ok = false;
}
return(next_ok);
}
