Ejemplo n.º 1
0
        /// <summary>
        /// Detect and show path when dragging
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void OnDragDelta_DetectPath(object sender, DragDeltaEventArgs e)
        {
            AdornerDataThumb <ModelItem, Connector> thumb = sender as AdornerDataThumb <ModelItem, Connector>;
            Point     currentPoint = thumb.Data.Position + new Vector(e.HorizontalChange, e.VerticalChange);
            Connector target       = HitTest(thumb, currentPoint);
            ModelItem item         = thumb.AdornedParent;
            Canvas    canvas       = item.ContainerCanvas;

#if DEBUG_ON
            // test value
            System.Console.WriteLine("{0} Dragging - connItem {1} ", System.DateTime.Now.Millisecond, drawingConn);
#endif
            if (drawingConn == null)
            {
                // create new connection
                drawingConn = new ConnectionItem();
                // get current connection type
                Window         w        = Window.GetWindow(canvas);
                ConnectionType connType = (ConnectionType)(w.FindName("CurrentConnectionType") as ComboBox).SelectedIndex;
                drawingConn.ContentObject.Type   = connType.ToString();
                drawingConn.ContentObject.Source = thumb.Data;  // bind source here
                Diagram diagram = Project.Current.Children.FindByCanvas(canvas);
                diagram.Children.Add(drawingConn.ContentObject);
            }
            if ((drawingConn.ContentObject.Sink = target) != null)
            {
                drawingConn.UpdatePath();
            }
            else
            {
                drawingConn.UpdatePath(drawingConn.ContentObject.SinkPosition = currentPoint);
            }
            drawingConn.Draw();
            e.Handled = true;
        }
Ejemplo n.º 2
0
        private AdornerDataThumb <ModelItem, Connector> GetConnectorThumb(Connector conn)
        {
            AdornerDataThumb <ModelItem, Connector> thumb = new AdornerDataThumb <ModelItem, Connector>(AdornedElement as ModelItem, conn);

            thumb.Style          = FindResource("ConnectorStyle_" + conn.Type.ToString()) as Style;
            thumb.DragDelta     += OnDragDelta_DetectPath;
            thumb.DragCompleted += OnDragCompleted_Connect;
            return(thumb);
        }
Ejemplo n.º 3
0
        /// <summary>
        /// Do hit test, if the target is a thumb (another connector), then return it
        /// </summary>
        /// <param name="hitPoint"></param>
        /// <returns></returns>
        private static Connector HitTest(AdornerDataThumb <ModelItem, Connector> thumb, Point hitPoint)
        {
            ModelItem elem = thumb.AdornedParent; Canvas canvas = elem.ContainerCanvas; HitTestResult hitRes = VisualTreeHelper.HitTest(canvas, hitPoint); DependencyObject hitObj = null;
            Model     model = elem.ContentObject; ModelItem res = null;

            if (hitRes != null)
            {
                hitObj = hitRes.VisualHit;
            }
            while (hitObj != null && hitObj != canvas && (res = hitObj as ModelItem) == null)
            {
                hitObj = VisualTreeHelper.GetParent(hitObj);
            }
#if DEBUG_ON
            // test value
            System.Console.WriteLine("{0} hitObj {1} ", System.DateTime.Now.Millisecond, hitObj.GetType());
#endif
            // test fails
            if (res == null || res == elem)
            {
                return(null);
            }
            // spilit the rectangle into four areas with two line: y=-h/w*x+h, y=h/w*x
            double        width = res.Size.Width, height = res.Size.Height;
            Vector        relativeVector = hitPoint - res.Position;
            double        y1 = relativeVector.X * height / width, y2 = -y1 + height;
            ConnectorType type = ConnectorType.Center;
            // now calculate which connector is that
            if (relativeVector.Y < y1 && relativeVector.Y < y2)
            {
                type = ConnectorType.Top;
            }
            else if (relativeVector.Y > y1 && relativeVector.Y < y2)
            {
                type = ConnectorType.Left;
            }
            else if (relativeVector.Y > y1 && relativeVector.Y > y2)
            {
                type = ConnectorType.Bottom;
            }
            else if (relativeVector.Y < y1 && relativeVector.Y > y2)
            {
                type = ConnectorType.Right;
            }
#if DEBUG_ON
            // test value
            System.Console.WriteLine("{0} Connector.Type {1} width {2} height {3}", System.DateTime.Now.Millisecond, type.ToString(), width, height);
#endif
            return(res.ContentObject.GetConnector(type));
        }
Ejemplo n.º 4
0
        /// <summary>
        /// When drag is completed, i.e. mouse up
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void OnDragCompleted_Connect(object sender, DragCompletedEventArgs e)
        {
            AdornerDataThumb <ModelItem, Connector> thumb = sender as AdornerDataThumb <ModelItem, Connector>;
            Point     currentPoint = thumb.Data.Position + new Vector(e.HorizontalChange, e.VerticalChange);
            Connector target       = HitTest(thumb, currentPoint);
            ModelItem item         = thumb.AdornedParent;
            Canvas    canvas       = item.ContainerCanvas;

#if DEBUG_ON
            // test value
            System.Console.WriteLine("{0} DragCompleted - connItem {1} ", System.DateTime.Now.Millisecond, drawingConn);
#endif
            if (drawingConn != null)
            {
                // if target is empty, cancel the connection
                if (drawingConn.ContentObject.Sink == null)
                {
                    Diagram diagram = Project.Current.Children.FindByCanvas(canvas);
                    diagram.Children.Remove(drawingConn.ContentObject);
                }
                drawingConn = null;
            }
            e.Handled = true;
        }