//TODO:Test it
private XElement SerializeState(WorkflowScrollViewer scrollViewer)
{
using (var stream = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(WorkflowScrollViewer));
serializer.Serialize(stream, scrollViewer);
stream.Position = 0;
// using (XmlReader reader = XmlReader.Create(stream))
// {
return(XElement.Load(stream));
// }
}
}
/// <summary>
/// Caches the current changes to the specified workflow.
/// </summary>
/// <param name="workflow">The workflow.</param>
public void CacheWorkflow(WorkflowScrollViewer scrollViewer)
{
if (scrollViewer == null)
{
return;
}
var doc = new XDocument();
using (XmlWriter writer = doc.CreateWriter())
{
XmlSerializer serializer = new XmlSerializer(typeof(WorkflowScrollViewer));
serializer.Serialize(writer, scrollViewer);
}
scrollViewer.ActiveWorkflow.SetAppState(APP_NAME, doc.Root, Guid.Empty);
}
/// <summary>
/// Loads a workflow instance
/// </summary>
/// <param name="fileName">path to .flo file. If null, create new temporary Workflow.</param>
public void LoadWorkflow(string fileName = null)
{
TabItem tabItem = new TabItem();
Brush unselectedBrush = new SolidColorBrush(ColorBackground);
tabItem.Background = unselectedBrush;
string headerName = "";
logger.Info("Creating new workflow object");
var workflow = new Workflow();
if (fileName != null)
{
try
{
workflow.TryLoad(fileName);
var elem = workflow.GetAppState(APP_NAME, Guid.Empty);
using (var reader = elem.CreateReader())
{
reader.ReadStartElement();
XmlSerializer serializer = new XmlSerializer(typeof(WorkflowScrollViewer));
tabItem.Content = serializer.Deserialize(reader);
headerName = ((WorkflowScrollViewer)tabItem.Content).XmlTabHeader;
void OnSelectionChanged(object obj, SelectionChangedEventArgs e)
{
if (e.AddedItems.Contains(tabItem))
{
TabControl.SelectionChanged -= OnSelectionChanged;
// Update Xml provided values pertaining to layout based on when
// the application idles after unpacking all of the controls
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
new Action(() =>
{
// Run first configuration pass
((WorkflowScrollViewer)tabItem.Content).OnConfigureLayout();
// Schedule rendering lines after the first pass layout adjustment is finished
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
new Action(() =>
{
((WorkflowScrollViewer)tabItem.Content).OnConfigureLayout();
}));
}));
}
}
TabControl.SelectionChanged += OnSelectionChanged;
}
((WorkflowScrollViewer)tabItem.Content).ActiveWorkflow = workflow;
}
catch (Exception e)
{
var msg = $"Could not load workflow: {e.Message}";
if (e.InnerException != null)
{
msg += " " + e.InnerException.Message;
}
Logger.Log(Severity.ERROR, LogCategory.APP, msg);
MessageBox.Show(msg, "", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
else
{
workflow.SetAsNew();
workflow.Title = $"Workflow {TabControl.Items.Count + 1}";
headerName = workflow.Title;
var content = new WorkflowScrollViewer();
content.ActiveWorkflow = workflow;
tabItem.Content = content;
}
TabControl.SelectionChanged += (obj, e) =>
{
if (e.AddedItems.Contains(tabItem))
{
tabItem.Background = Brushes.White;
}
else
{
tabItem.Background = unselectedBrush;
}
};
tabItem.Header = new TabHeader(headerName, tabItem, OnTabClosed);
TabControl.Items.Add(tabItem);
TabControl.SelectedItem = tabItem;
UpdateLayout();
}