/// <summary>
        /// Delegate called when the mouse move on the working canvas.
        /// </summary>
        /// <param name="pSender">The event sender.</param>
        /// <param name="pEventArgs">The event arguments.</param>
        private void OnWorkingCanvasMouseMove(object pSender, MouseEventArgs pEventArgs)
        {
            if (pEventArgs.LeftButton == MouseButtonState.Pressed)
            {
                // Create a path according to the source and the end.
                this.ConnectingLine.To = pEventArgs.GetPosition(this.WorkingCanvas);

                // Updating the cursor.
                this.mTargetConnector = this.TryHitInputConnector();
                if (this.mTargetConnector != null)
                {
                    PortViewModel lTargetViewModel = this.mTargetConnector.ParentPort.Content as PortViewModel;
                    PortViewModel lSourceViewModel = this.mSourceConnector.ParentPort.Content as PortViewModel;
                    if (lSourceViewModel.CanBeConnectedTo(lTargetViewModel))
                    {
                        this.WorkingCanvas.Cursor = Cursors.Cross;
                    }
                    else
                    {
                        this.WorkingCanvas.Cursor = Cursors.No;
                        this.mTargetConnector     = null;
                    }
                }
                else
                {
                    this.WorkingCanvas.Cursor = Cursors.Cross;
                }
            }
        }
示例#2
0
        /// <summary>
        /// This method is called when a mouse button up occured on the adorner.
        /// </summary>
        /// <param name="pEventArgs">The event arguments</param>
        protected override void OnMouseUp(MouseButtonEventArgs pEventArgs)
        {
            // Release the mouse capture.
            if (this.IsMouseCaptured)
            {
                this.ReleaseMouseCapture();
            }

            // Getting the position.
            Point lHitPoint = pEventArgs.GetPosition(this);

            AdornerLayeredCanvas lParentCanvas = this.AdornedElement as AdornerLayeredCanvas;

            if (lParentCanvas != null)
            {
                // Remove the adorner.
                AdornerLayer lLayer = lParentCanvas.AdornerLayer;
                if (lLayer != null)
                {
                    lLayer.Remove(this);
                }

                // Hitting the target connector.
                InputConnector lTargetConnector = lParentCanvas.HitControl <InputConnector>(lHitPoint);
                if (lTargetConnector != null)
                {
                    GraphViewModel lGraphViewModel = lParentCanvas.DataContext as GraphViewModel;
                    if (lGraphViewModel != null)
                    {
                        PortViewModel lTargetViewModel = lTargetConnector.ParentPort.Content as PortViewModel;
                        PortViewModel lSourceViewModel = this.mSourceConnector.ParentPort.Content as PortViewModel;
                        if (lTargetViewModel != null && lSourceViewModel.CanBeConnectedTo(lTargetViewModel))
                        {
                            ConnectionViewModel lConnectionViewModel = new ConnectionViewModel();
                            lConnectionViewModel.Output = lSourceViewModel;
                            lConnectionViewModel.Input  = lTargetViewModel;
                            lGraphViewModel.AddConnection(lConnectionViewModel);
                        }
                    }
                }
            }
        }