void OnEditorClosing(object sender, EventArgs e)
{
if (this.expressionEditorInstance != null)
{
//these events are expected to be unregistered during lost focus event, but
//we are unregistering them during unload just in case. Ideally we want to
//do this in the CloseExpressionEditor method
this.expressionEditorInstance.LostAggregateFocus -= new EventHandler(OnEditorLostAggregateFocus);
this.expressionEditorInstance.Closing -= new EventHandler(OnEditorClosing);
this.expressionEditorInstance = null;
}
Border boarder = this.hostControl.Parent as Border;
if (boarder != null)
{
boarder.Child = null;
}
this.hostControl = null;
this.editorName = null;
}
void OnEditorLoaded(object sender, RoutedEventArgs e)
{
if (!this.isEditorLoaded)
{
// If the service exists, create an expression editor and add it to the grid - else switch to the textbox data template
if (this.expressionEditorService != null)
{
Border border = (Border)sender;
// Get the references and variables in scope
AssemblyContextControlItem assemblies = (AssemblyContextControlItem)this.Context.Items.GetValue(typeof(AssemblyContextControlItem));
List<ModelItem> declaredVariables = VisualBasicEditor.GetVariablesInScope(this.OwnerActivity);
ImportedNamespaceContextItem importedNamespaces = this.Context.Items.GetValue<ImportedNamespaceContextItem>();
importedNamespaces.EnsureInitialized(this.Context);
//if the expression text is empty and the expression type is set, then we initialize the text to prompt text
if (String.Equals(this.ExpressionText, string.Empty, StringComparison.OrdinalIgnoreCase) && this.ExpressionType != null)
{
this.Text = TypeToPromptTextConverter.GetPromptText(this.ExpressionType);
}
//this is a hack
this.blockWidth = Math.Max(this.ActualWidth - 8, 0); //8 is the margin
if (this.HasErrors)
{
this.blockWidth = Math.Max(this.blockWidth - 16, 0); //give 16 for error icon
}
try
{
if (this.ExpressionType != null)
{
this.expressionEditorInstance = this.expressionEditorService.CreateExpressionEditor(assemblies, importedNamespaces, declaredVariables, this.Text, this.ExpressionType, new Size(this.blockWidth, this.blockHeight));
}
else
{
this.expressionEditorInstance = this.expressionEditorService.CreateExpressionEditor(assemblies, importedNamespaces, declaredVariables, this.Text, new Size(this.blockWidth, this.blockHeight));
}
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
}
if (this.expressionEditorInstance != null)
{
try
{
this.expressionEditorInstance.VerticalScrollBarVisibility = this.VerticalScrollBarVisibility;
this.expressionEditorInstance.HorizontalScrollBarVisibility = this.HorizontalScrollBarVisibility;
this.expressionEditorInstance.AcceptsReturn = this.AcceptsReturn;
this.expressionEditorInstance.AcceptsTab = this.AcceptsTab;
// Add the expression editor to the text panel, at column 1
this.hostControl = this.expressionEditorInstance.HostControl;
// Subscribe to this event to change scrollbar visibility on the fly for auto, and to resize the hostable editor
// as necessary
this.expressionEditorInstance.LostAggregateFocus += new EventHandler(OnEditorLostAggregateFocus);
this.expressionEditorInstance.Closing += new EventHandler(OnEditorClosing);
// Set up Hostable Editor properties
this.expressionEditorInstance.MinLines = this.MinLines;
this.expressionEditorInstance.MaxLines = this.MaxLines;
this.expressionEditorInstance.HostControl.Style = (Style)FindResource("editorStyle");
border.Child = this.hostControl;
this.expressionEditorInstance.Focus();
}
catch (KeyNotFoundException ex)
{
Debug.Fail("Unable to find editor with the following editor name: " + this.editorName, ex.Message);
}
}
}
if (this.expressionEditorInstance == null)
{
this.ContentTemplate = (DataTemplate)FindResource("textbox");
}
this.PerfProvider.WorkflowDesignerExpressionEditorLoaded();
this.isEditorLoaded = true;
}
}
