/**
* public static void ProcessToolAndTrashDragDrop
* Implements proper constraints on deletion by dragging blocks into the Toolbox or Trash, then performs the
* appropriate deletion operation.
* @param[in] originalParent - The Parent of the block being dragged
* @param[in] _eleBlock - The block being dragged
*/
public static void ProcessDeleteDragDrop(Panel originalParent, QueryBlockBase _eleBlock)
{
if (originalParent is DesignerPanel)
{
if (_eleBlock.GetType().BaseType.Name == "InitialBlockBase")
{
queryStarted = false;
if (_eleBlock.IsFirstBlock)
{
originalParent.Children.RemoveRange(0, originalParent.Children.Count);
return;
}
else
{
int index = originalParent.Children.IndexOf(_eleBlock);
originalParent.Children.RemoveRange(originalParent.Children.IndexOf(_eleBlock), originalParent.Children.Count - originalParent.Children.IndexOf(_eleBlock));
}
}
//Refactor the following using inheritence/polymorphism
if (_eleBlock.GetType().Name.EndsWith("NestBlock"))
{
queryStarted = true;
originalParent.Children.RemoveRange(originalParent.Children.IndexOf(_eleBlock), originalParent.Children.Count - originalParent.Children.IndexOf(_eleBlock));
}
originalParent.Children.Remove(_eleBlock);
}
}
/**
* public static void ProcessDesignerDragDrop
* Processes all constraints currently applied to the DesignerPanel and executes the appropriate
* drag + drop operation. Called from the Designer_Drop handler in MainWindow.xaml.cs. Returns no values.
* @param[in] _panel - The panel that fired the drop event handler.
* @param[in] _element - The QueryBlockBase type UIElement that is the target of the drag/drop operation
**/
public static void ProcessDesignerDragDrop(Panel _panel, Panel originalParent, QueryBlockBase _element)
{
Type blockType = _element.GetType();
var newBlock = (QueryBlockBase)Activator.CreateInstance(blockType);
newBlock.StartPoint = _element.StartPoint;
newBlock.EnableInput();
bool isInitial = newBlock.GetType().BaseType.Name == "InitialBlockBase";
if (!queryStarted)
{
if (isInitial)
{
if (_panel.Children.Count == 0)
{
newBlock.IsFirstBlock = true;
}
queryStarted = true;
_panel.Children.Add(newBlock);
}
else
{
Application.Current.Resources["ErrorOutput"] = "Please use a Green block (Select/Update/Add Etc.) to begin a Query.";
ErrorPopUp newInitialBlockError = new ErrorPopUp();
newInitialBlockError.ShowDialog();
}
}
else if (queryStarted)
{
if (originalParent is DesignerPanel == false)
{
if (!isInitial)
{
if (queryStarted)
{
if (newBlock.GetType().Name.EndsWith("NestBlock"))
{
queryStarted = false;
}
_panel.Children.Add(newBlock);
}
}
else
{
Application.Current.Resources["ErrorOutput"] = "Red blocks can only be used to commence a Query or SubQuery.";
ErrorPopUp newInvalidInitialBlockError = new ErrorPopUp();
newInvalidInitialBlockError.ShowDialog();
}
}
}
}