1 files changed, 190 insertions, 3 deletions

diff --git a/src/GraphicObjects/Docker.cs b/src/GraphicObjects/Docker.cs
index 57b49390..3b66eb7e 100644
--- a/src/GraphicObjects/Docker.cs
+++ b/src/GraphicObjects/Docker.cs
@@ -26,17 +26,45 @@
 using System;
 using System.Xml.Serialization;
 using System.ComponentModel;
+using Crow.IML;
 
 namespace Crow
 {
 	public class Docker : Group
 	{
+		static Instantiator instStack, instSplit, instSpacer;
 		#region CTOR
+		static Docker () {
+			instStack = Instantiator.CreateFromImlFragment(@"<GenericStack Background='Blue' AllowDrop='true' DragEnter='onStackDragEnter'/>");
+			instSplit = Instantiator.CreateFromImlFragment(@"<Splitter/>");
+			instSpacer = Instantiator.CreateFromImlFragment(@"<GraphicObject Background='Red' IsEnabled='false'/>");
+		}
 		public Docker () : base ()
 		{
 		}
 		#endregion
 
+		GenericStack rootStack = null;
+
+		public override void AddChild (GraphicObject g)
+		{
+			DockWindow dw = g as DockWindow;
+			if (dw == null)
+				throw new Exception ("Docker accept only DockWindow as child");
+			
+			base.AddChild (g);
+
+			dw.LogicalParent = this;
+		}
+		public override void RemoveChild (GraphicObject child)
+		{
+			child.LogicalParent = null;
+
+
+			base.RemoveChild (child);
+		}
+
+		GenericStack mainStack = null;
 		int dockingThreshold;
 
 		[XmlAttributeAttribute][DefaultValue(10)]
@@ -51,17 +79,176 @@ namespace Crow
 			}
 		}
 
+		bool showDockingTarget = false;
+		Alignment dockingDirection = Alignment.Center;
+		int dockingDiv = 5;
+
 		public override void onMouseMove (object sender, MouseMoveEventArgs e)
 		{			
 			if (CurrentInterface.DragAndDropOperation?.DragSource as DockWindow != null) {
 				DockWindow dw = CurrentInterface.DragAndDropOperation?.DragSource as DockWindow;
-				if (CurrentInterface.DragAndDropOperation.DragSource.Parent == this && !dw.IsDocked) 
-					dw.MoveAndResize (e.XDelta, e.YDelta);				
-			}
+				if (CurrentInterface.DragAndDropOperation.DragSource.Parent == this && !dw.IsDocked)
+					dw.MoveAndResize (e.XDelta, e.YDelta);
 
+				Rectangle r = ClientRectangle;
+				int vTreshold = r.Height / dockingDiv;
+				int hTreshold = r.Width / dockingDiv;
+
+
+				bool showDock = true;
+
+				if (dw.Slot.Left < hTreshold)
+					dockingDirection = Alignment.Left;
+				else if (dw.Slot.Right > r.Right - hTreshold)
+					dockingDirection = Alignment.Right;
+				else if (dw.Slot.Top < vTreshold)
+					dockingDirection = Alignment.Top;
+				else if (dw.Slot.Bottom > r.Bottom - vTreshold)
+					dockingDirection = Alignment.Bottom;
+				else {
+					dockingDirection = Alignment.Center;
+					showDock = false;
+				}
+
+				showDockingTarget = showDock;
+
+				RegisterForGraphicUpdate ();
+
+				//System.Diagnostics.Debug.WriteLine ("Dock: {0}", dockingDirection);
+			} else
+				showDockingTarget = false;
 
 			base.onMouseMove (sender, e);
 		}
+		protected override void onDragEnter (object sender, DragDropEventArgs e)
+		{
+			base.onDragEnter (sender, e);
+		}
+		void onStackDragEnter (object sender, DragDropEventArgs e)
+		{
+			base.onDragEnter (sender, e);
+
+			mainStack = sender as GenericStack;
+		}
+		protected override void onDraw (Cairo.Context gr)
+		{
+			gr.Save ();
+
+			Rectangle rBack = new Rectangle (Slot.Size);
+
+			Background.SetAsSource (gr, rBack);
+			CairoHelpers.CairoRectangle (gr, rBack, CornerRadius);
+			gr.Fill ();
+
+			if (ClipToClientRect) {
+				//clip to client zone
+				CairoHelpers.CairoRectangle (gr, ClientRectangle, CornerRadius);
+				gr.Clip ();
+			}
+
+			lock (Children) {
+				foreach (GraphicObject g in Children) {
+					if (CurrentInterface.DragAndDropOperation?.DragSource == g)
+						continue;
+					g.Paint (ref gr);
+				}
+			}
+
+			if (showDockingTarget) {
+				Rectangle r;
+				if (mainStack == null)
+					r = ClientRectangle;
+				else
+					r = mainStack.ClientRectangle;
+				
+				switch (dockingDirection) {
+				case Alignment.Top:
+					gr.Rectangle (r.Left, r.Top, r.Width, r.Height / dockingDiv);
+					break;
+				case Alignment.Bottom:
+					gr.Rectangle (r.Left, r.Bottom - r.Height / dockingDiv, r.Width, r.Height / dockingDiv);
+					break;
+				case Alignment.Left:
+					gr.Rectangle (r.Left, r.Top, r.Width / dockingDiv, r.Height);
+					break;
+				case Alignment.Right:
+					gr.Rectangle (r.Right - r.Width / dockingDiv, r.Top, r.Width / dockingDiv, r.Height);
+					break;
+				}
+				gr.LineWidth = 1;
+				gr.SetSourceRGBA (0.4, 0.4, 0.9, 0.4);
+				gr.FillPreserve ();
+				gr.SetSourceRGBA (0.9, 0.9, 1.0, 0.8);
+				gr.Stroke ();
+			}
+
+			if (CurrentInterface.DragAndDropOperation != null)
+				CurrentInterface.DragAndDropOperation.DragSource.Paint (ref gr);
+
+
+			gr.Restore ();	
+		}
+
+		public void Dock(DockWindow dw){
+			if (dockingDirection == Alignment.Center)
+				return;
+			lock (CurrentInterface.UpdateMutex) {
+
+				Splitter splitter = instSplit.CreateInstance<Splitter> (CurrentInterface);
+
+				dw.Resizable = false;
+				dw.Left = dw.Top = 0;
+				this.RemoveChild (dw);
+
+				Rectangle r;
+				if (mainStack == null) {
+					mainStack = instStack.CreateInstance<GenericStack> (CurrentInterface);
+					this.AddChild (mainStack);
+					this.putWidgetOnBottom (mainStack);
+					r = ClientRectangle;
+				} else
+					r = mainStack.ClientRectangle;				
+				 
+				int vTreshold = r.Height / dockingDiv;
+				int hTreshold = r.Width / dockingDiv;
+
+				switch (dockingDirection) {
+				case Alignment.Top:						
+					dw.Width = Measure.Stretched;
+					mainStack.Orientation = Orientation.Vertical;
+					mainStack.AddChild (dw);
+					mainStack.AddChild (splitter);
+					//mainStack.AddChild (instSpacer.CreateInstance (CurrentInterface));
+					break;
+				case Alignment.Bottom:
+					dw.Width = Measure.Stretched;
+					mainStack.Orientation = Orientation.Vertical;
+					//mainStack.AddChild (instSpacer.CreateInstance (CurrentInterface));
+					mainStack.AddChild (splitter);
+					mainStack.AddChild (dw);
+					break;
+				case Alignment.Left:
+					dw.Height = Measure.Stretched;
+					mainStack.Orientation = Orientation.Horizontal;
+					mainStack.AddChild (dw);
+					mainStack.AddChild (splitter);
+					//mainStack.AddChild (instSpacer.CreateInstance (CurrentInterface));
+					break;
+				case Alignment.Right:
+					dw.Height = Measure.Stretched;
+					mainStack.Orientation = Orientation.Horizontal;
+					//mainStack.AddChild (instSpacer.CreateInstance (CurrentInterface));
+					mainStack.AddChild (splitter);
+					mainStack.AddChild (dw);
+					break;
+				}
+
+			}
+		}
+		protected override void onDrop (object sender, DragDropEventArgs e)
+		{
+			base.onDrop (sender, e);
+		}
 	}
 }