private bool CollisionDetection(ElementContentItem dragItem, ElementContentItem otherItem)
{
Rect dragRect = GetItemRect(dragItem);
Rect otherRect = GetItemRect(otherItem);
return(dragRect.IntersectsWith(otherRect));
}
private void Workbench_MouseMove(object sender, MouseEventArgs e)
{
Point mousePos = e.GetPosition(null);
Vector diff = mousePos - _MouseStartPoint;
if (_DragStartedItem != null && e.LeftButton == MouseButtonState.Pressed)
{
double newX = _ItemStartPoint.X + diff.X;
double newY = _ItemStartPoint.Y + diff.Y;
Point newPt = ClipPoint(new Point(newX, newY));
Canvas.SetLeft(_DragStartedItem, newPt.X);
Canvas.SetTop(_DragStartedItem, newPt.Y);
foreach (UIElement uiElement in Workbench.Children)
{
if (uiElement is ElementContentItem && uiElement != _DragStartedItem)
{
ElementContentItem elementItem = uiElement as ElementContentItem;
elementItem.Collision = CollisionDetection(elementItem, mousePos);
}
}
SolidColorBrush brush = new SolidColorBrush();
brush.Color = InRecycleBin(mousePos) ? Color.FromArgb(0x55, 0xFF, 0, 0) : Colors.Transparent;
RecycleBin.Background = brush;
}
}
private void BringToFront(ElementContentItem item)
{
foreach (UIElement control in Workbench.Children)
{
Canvas.SetZIndex(control, 0);
}
Canvas.SetZIndex(item, 1);
}
private void Element_MouseDown(object sender, MouseEventArgs e)
{
var item = e.Source as ElementContentItem;
if (item != null)
{
_MouseStartPoint = e.GetPosition(null);
_ItemStartPoint = new Point(Canvas.GetLeft(item), Canvas.GetTop(item));
BringToFront(item);
_DragStartedItem = item;
}
}
private ElementContentItem CreateItem(double x, double y, Element element)
{
ElementContentItem item = new ElementContentItem();
Canvas.SetLeft(item, x);
Canvas.SetTop(item, y);
item.Template = (ControlTemplate)Workbench.Resources["ElementItemTemplate"];
item.Element = element;
item.MouseDown += Element_MouseDown;
item.MouseDoubleClick += Element_MouseDoubleClick;
item.AllowDrop = true;
return(item);
}
private void ElementContentItem_MouseDown(object sender, MouseButtonEventArgs e)
{
var item = sender as ElementContentItem;
if (item != null && e.ChangedButton == MouseButton.Left)
{
Point p = item.TranslatePoint(new Point(0, 0), Workbench);
_DragNew = true;
_DragStartedItem = CreateItem(p.X, p.Y, item.Element);
Workbench.Children.Add(_DragStartedItem);
_MouseStartPoint = e.GetPosition(null);
_ItemStartPoint = new Point(Canvas.GetLeft(_DragStartedItem), Canvas.GetTop(_DragStartedItem));
BringToFront(_DragStartedItem);
}
}
private void BringToFront(ElementContentItem item)
{
foreach (UIElement control in Workbench.Children)
{
Canvas.SetZIndex(control, 0);
}
Canvas.SetZIndex(item, 1);
}
private bool CollisionDetection(ElementContentItem dragItem, ElementContentItem otherItem)
{
Rect dragRect = GetItemRect(dragItem);
Rect otherRect = GetItemRect(otherItem);
return dragRect.IntersectsWith(otherRect);
}
private Rect GetItemRect(ElementContentItem item)
{
return(new Rect(Canvas.GetLeft(item), Canvas.GetTop(item), item.ActualWidth, item.ActualHeight));
}
private ElementContentItem CreateItem( double x, double y, Element element)
{
ElementContentItem item = new ElementContentItem();
Canvas.SetLeft(item, x);
Canvas.SetTop(item, y);
item.Template = (ControlTemplate) Workbench.Resources["ElementItemTemplate"];
item.Element = element;
item.MouseDown += Element_MouseDown;
item.MouseDoubleClick += Element_MouseDoubleClick;
item.AllowDrop = true;
return item;
}
private bool CollisionDetection(ElementContentItem item, Point point)
{
Rect itemRect = GetItemRect(item);
return(itemRect.Contains(point));
}
private void ElementContentItem_MouseDown(object sender, MouseButtonEventArgs e)
{
var item = sender as ElementContentItem;
if (item != null && e.ChangedButton == MouseButton.Left)
{
Point p = item.TranslatePoint(new Point(0, 0), Workbench);
_DragNew = true;
_DragStartedItem = CreateItem(p.X, p.Y, item.Element);
Workbench.Children.Add(_DragStartedItem);
_MouseStartPoint = e.GetPosition(null);
_ItemStartPoint = new Point(Canvas.GetLeft(_DragStartedItem), Canvas.GetTop(_DragStartedItem));
BringToFront(_DragStartedItem);
}
}
private void Workbench_MouseUp(object sender, MouseButtonEventArgs e)
{
Console.WriteLine("Workbench_MouseUp called");
if (_DragStartedItem != null)
{
var item = _DragStartedItem;
Point mousePos = e.GetPosition(null);
if (InRecycleBin(mousePos))
{
// Recycle element
var anim = new DoubleAnimation
{
To = 0,
Duration = TimeSpan.FromMilliseconds(100),
FillBehavior = FillBehavior.Stop
};
anim.Completed += (s, a) =>
{
Workbench.Children.Remove(item);
};
item.BeginAnimation(UIElement.OpacityProperty, anim);
}
else
{
foreach (UIElement uiElement in Workbench.Children)
{
if (uiElement is ElementContentItem && uiElement != item)
{
ElementContentItem elementItem = uiElement as ElementContentItem;
if (CollisionDetection(elementItem, mousePos))
{
// Find center point between two elements
Rect dragItemRect = GetItemRect(item);
Rect otherItemRect = GetItemRect(elementItem);
Point dragItemCenter = GetCenterPoint(dragItemRect);
Point otherItemCenter = GetCenterPoint(otherItemRect);
Rect bothItemsRect = new Rect(dragItemCenter, otherItemCenter);
Point centerPoint = GetCenterPoint(bothItemsRect);
// Do expirement
ElementDatabase.ExperimentResult result = _ElementDatabase.DoExperiment(item.Element, elementItem.Element);
// Provide feedback for success
if (result.Success)
{
// Remove items from workbench
Workbench.Children.Remove(elementItem);
Workbench.Children.Remove(item);
// Add results back
AddElements(centerPoint.X, centerPoint.Y, result.ElementsCreated);
}
// Break out of the foreach (...) so we don't process
break;
}
}
}
}
// Reset borders
foreach (UIElement uiElement in Workbench.Children)
{
if (uiElement is ElementContentItem)
{
(uiElement as ElementContentItem).Collision = false;
}
}
// Reset RecycleBin background
RecycleBin.Background = new SolidColorBrush(Colors.Transparent);
// Done dragging
Point toolboxOrigin = Toolbox.TranslatePoint(new Point(0, 0), Workbench);
Rect toolboxBounds = new Rect(toolboxOrigin.X, toolboxOrigin.Y, Toolbox.ActualWidth, Toolbox.ActualHeight);
if (_DragNew && !!toolboxBounds.Contains(mousePos))
{
Workbench.Children.Remove(_DragStartedItem);
}
_DragNew = false;
_DragStartedItem = null;
}
}
private bool CollisionDetection(ElementContentItem item, Point point)
{
Rect itemRect = GetItemRect(item);
return itemRect.Contains(point);
}
private void Workbench_MouseUp(object sender, MouseButtonEventArgs e)
{
Console.WriteLine("Workbench_MouseUp called");
if (_DragStartedItem != null)
{
var item = _DragStartedItem;
Point mousePos = e.GetPosition(null);
if (InRecycleBin(mousePos))
{
// Recycle element
var anim = new DoubleAnimation
{
To = 0,
Duration = TimeSpan.FromMilliseconds(100),
FillBehavior = FillBehavior.Stop
};
anim.Completed += (s, a) =>
{
Workbench.Children.Remove(item);
};
item.BeginAnimation(UIElement.OpacityProperty, anim);
}
else
{
foreach (UIElement uiElement in Workbench.Children)
{
if (uiElement is ElementContentItem && uiElement != item)
{
ElementContentItem elementItem = uiElement as ElementContentItem;
if (CollisionDetection(elementItem, mousePos))
{
// Find center point between two elements
Rect dragItemRect = GetItemRect(item);
Rect otherItemRect = GetItemRect(elementItem);
Point dragItemCenter = GetCenterPoint(dragItemRect);
Point otherItemCenter = GetCenterPoint(otherItemRect);
Rect bothItemsRect = new Rect(dragItemCenter, otherItemCenter);
Point centerPoint = GetCenterPoint(bothItemsRect);
// Do expirement
ElementDatabase.ExperimentResult result = _ElementDatabase.DoExperiment(item.Element, elementItem.Element);
// Provide feedback for success
if (result.Success)
{
// Remove items from workbench
Workbench.Children.Remove(elementItem);
Workbench.Children.Remove(item);
// Add results back
AddElements(centerPoint.X, centerPoint.Y, result.ElementsCreated);
}
// Break out of the foreach (...) so we don't process
break;
}
}
}
}
// Reset borders
foreach (UIElement uiElement in Workbench.Children)
{
if (uiElement is ElementContentItem)
{
(uiElement as ElementContentItem).Collision = false;
}
}
// Reset RecycleBin background
RecycleBin.Background = new SolidColorBrush(Colors.Transparent);
// Done dragging
Point toolboxOrigin = Toolbox.TranslatePoint(new Point(0, 0), Workbench);
Rect toolboxBounds = new Rect(toolboxOrigin.X, toolboxOrigin.Y, Toolbox.ActualWidth, Toolbox.ActualHeight);
if (_DragNew && !!toolboxBounds.Contains(mousePos))
{
Workbench.Children.Remove(_DragStartedItem);
}
_DragNew = false;
_DragStartedItem = null;
}
}
private Rect GetItemRect(ElementContentItem item)
{
return new Rect(Canvas.GetLeft(item), Canvas.GetTop(item), item.ActualWidth, item.ActualHeight);
}
private void Element_MouseDown(object sender, MouseEventArgs e)
{
var item = e.Source as ElementContentItem;
if (item != null)
{
_MouseStartPoint = e.GetPosition(null);
_ItemStartPoint = new Point(Canvas.GetLeft(item), Canvas.GetTop(item));
BringToFront(item);
_DragStartedItem = item;
}
}