/// <summary>
/// Do a one setup of the ports
/// </summary>
private void SetupInitialPortViewModels()
{
foreach (var item in nodeLogic.InPorts)
{
PortViewModel inportViewModel = SubscribePortEvents(item);
InPorts.Add(inportViewModel);
}
foreach (var item in nodeLogic.OutPorts)
{
PortViewModel outportViewModel = SubscribePortEvents(item);
OutPorts.Add(outportViewModel);
}
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
// We only entertain port clicking when the current state is idle,
// or when it is already having a connector being established.
if (currentState != State.None && (currentState != State.Connection))
{
return(false);
}
var portModel = portViewModel.PortModel;
var workspaceViewModel = owningWorkspace.DynamoViewModel.CurrentSpaceViewModel;
if (this.currentState != State.Connection) // Not in a connection attempt...
{
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Index;
var mode = DynamoModel.MakeConnectionCommand.Mode.Begin;
var command = new DynamoModel.MakeConnectionCommand(nodeId, portIndex, portModel.PortType, mode);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
if (null != owningWorkspace.activeConnector)
{
this.currentState = State.Connection;
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
owningWorkspace.IsCursorForced = false;
}
}
else // Attempt to complete the connection
{
// Check if connection is valid
if (owningWorkspace.CheckActiveConnectorCompatibility(portViewModel))
{
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Index;
var mode = DynamoModel.MakeConnectionCommand.Mode.End;
var command = new DynamoModel.MakeConnectionCommand(nodeId,
portIndex, portModel.PortType, mode);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
owningWorkspace.CurrentCursor = null;
owningWorkspace.IsCursorForced = false;
this.currentState = State.None;
}
}
return(true);
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
// We only entertain port clicking when the current state is idle,
// or when it is already having a connector being established.
if (currentState != State.None && (currentState != State.Connection))
{
return(false);
}
PortModel portModel = portViewModel.PortModel;
DynamoViewModel dynamoViewModel = dynSettings.Controller.DynamoViewModel;
WorkspaceViewModel workspaceViewModel = dynamoViewModel.CurrentSpaceViewModel;
if (this.currentState != State.Connection) // Not in a connection attempt...
{
PortType portType = PortType.INPUT;
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Owner.GetPortIndex(portModel, out portType);
dynamoViewModel.ExecuteCommand(new DynCmd.MakeConnectionCommand(
nodeId, portIndex, portType, DynCmd.MakeConnectionCommand.Mode.Begin));
if (owningWorkspace.IsConnecting)
{
this.currentState = State.Connection;
}
}
else // Attempt to complete the connection
{
PortType portType = PortType.INPUT;
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Owner.GetPortIndex(portModel, out portType);
dynamoViewModel.ExecuteCommand(new DynCmd.MakeConnectionCommand(
nodeId, portIndex, portType, DynCmd.MakeConnectionCommand.Mode.End));
this.currentState = State.None;
}
return(true);
}
private void OnMouseRelease(object sender, MouseButtonEventArgs e)
{
if (e == null) return; // in certain bizarre cases, e can be null
this.snappedPort = null;
var wvm = (DataContext as WorkspaceViewModel);
if (wvm == null) return;
wvm.HandleMouseRelease(workBench, e);
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
this.snappedPort = null;
bool mouseMessageHandled = false;
// If we are currently connecting and there is an active
// connector, redraw it to match the new mouse coordinates.
if (ViewModel.IsSnapping)
{
if (ViewModel.portViewModel != null)
{
if (ViewModel.CheckActiveConnectorCompatibility(ViewModel.portViewModel))
{
mouseMessageHandled = true;
ViewModel.HandleMouseMove(workBench, ViewModel.portViewModel.Center);
}
}
else
ViewModel.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
}
if (ViewModel.IsInIdleState)
{
// Find the dependency object directly under the mouse
// cursor, then see if it represents a port. If it does,
// then determine its type, we would like to show the
// "ArcRemoving" cursor when the mouse is over an out port.
Point mouse = e.GetPosition((UIElement)sender);
var dependencyObject = ElementUnderMouseCursor(mouse);
PortViewModel pvm = PortFromHitTestResult(dependencyObject);
if (null != pvm && (pvm.PortType == PortType.Input))
this.Cursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
else
this.Cursor = null;
}
// If selection is going to be dragged and ctrl is pressed.
if (ViewModel.IsDragging && Keyboard.Modifiers == ModifierKeys.Control)
{
var currentMousePosition = e.GetPosition(null);
// Set initialMousePosition here, so that we can use it in OnDragOver.
initialMousePosition = e.GetPosition(WorkspaceElements);
// Check that current mouse position is far enough from start position.
var canDrag =
(Math.Abs(currentMousePosition.X - startMousePosition.X) >
SystemParameters.MinimumHorizontalDragDistance) &&
(Math.Abs(currentMousePosition.Y - startMousePosition.Y) >
SystemParameters.MinimumVerticalDragDistance) &&
e.OriginalSource is DragCanvas;
if (canDrag)
{
DragAndDrop(e.GetPosition(WorkspaceElements));
mouseMessageHandled = true;
}
}
if (!mouseMessageHandled)
{
ViewModel.HandleMouseMove(workBench, e);
}
}
private void OnMouseRelease(object sender, MouseButtonEventArgs e)
{
if (e == null) return; // in certain bizarre cases, e can be null
snappedPort = null;
if (ViewModel == null) return;
// check IsInIdleState and IsPanning before finishing an action with HandleMouseRelease
var returnToSearch = (ViewModel.IsInIdleState || ViewModel.IsPanning)
&& e.ChangedButton == MouseButton.Right && Keyboard.Modifiers == ModifierKeys.Control;
ViewModel.HandleMouseRelease(workBench, e);
if (returnToSearch)
{
ViewModel.DynamoViewModel.SearchViewModel.OnRequestFocusSearch();
// do not open context menu in this case
e.Handled = true;
}
}
private void OnMouseRelease(object sender, MouseButtonEventArgs e)
{
if (e == null) return; // in certain bizarre cases, e can be null
snappedPort = null;
if (ViewModel == null) return;
// check IsInIdleState and IsPanning before finishing an action with HandleMouseRelease
var returnToSearch = (ViewModel.IsInIdleState || ViewModel.IsPanning)
&& e.ChangedButton == MouseButton.Right && Keyboard.Modifiers == ModifierKeys.Control;
ViewModel.HandleMouseRelease(workBench, e);
ContextMenuPopup.IsOpen = false;
if (returnToSearch)
{
ViewModel.DynamoViewModel.SearchViewModel.OnRequestFocusSearch();
}
else if (e.ChangedButton == MouseButton.Right && e.OriginalSource == zoomBorder)
{
// open if workspace is right-clicked itself
// (not node, note, not buttons from viewControlPanel such as zoom, pan and so on)
ContextMenuPopup.IsOpen = true;
}
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
// We only entertain port clicking when the current state is idle,
// or when it is already having a connector being established.
if (currentState != State.None && (currentState != State.Connection))
{
return(false);
}
var portModel = portViewModel.PortModel;
var workspaceViewModel = owningWorkspace.DynamoViewModel.CurrentSpaceViewModel;
if (this.currentState != State.Connection) // Not in a connection attempt...
{
if (Keyboard.Modifiers == ModifierKeys.Alt &&
portViewModel.NodeAutoCompleteCommand.CanExecute(portViewModel))
{
portViewModel.NodeAutoCompleteCommand.Execute(portViewModel);
this.currentState = State.Connection;
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
owningWorkspace.IsCursorForced = false;
Timestamp = DateTime.Now;
return(true);
}
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Index;
var mode = DynamoModel.MakeConnectionCommand.Mode.Begin;
if (Keyboard.Modifiers == ModifierKeys.Shift) //if shift key is down, handle multiple wire reconnections
{
multipleConnections = true;
mode = DynamoModel.MakeConnectionCommand.Mode.BeginShiftReconnections;
}
else if (Keyboard.Modifiers == ModifierKeys.Control)
{
// If the control key is held down, check if there is a need to duplicate connections
mode = DynamoModel.MakeConnectionCommand.Mode.BeginDuplicateConnection;
}
var command = new DynamoModel.MakeConnectionCommand(nodeId, portIndex, portModel.PortType, mode);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
if (null != owningWorkspace.FirstActiveConnector)
{
this.currentState = State.Connection;
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
owningWorkspace.IsCursorForced = false;
}
}
else // Attempt to complete the connection
{
// Check if connection is valid
if (owningWorkspace.CheckActiveConnectorCompatibility(portViewModel))
{
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Index;
var mode = DynamoModel.MakeConnectionCommand.Mode.End;
this.currentState = State.None;
owningWorkspace.CurrentCursor = null;
if (multipleConnections)
{
mode = DynamoModel.MakeConnectionCommand.Mode.EndShiftReconnections;
}
else if (Keyboard.Modifiers == ModifierKeys.Control) // If the control key is held down
{
mode = DynamoModel.MakeConnectionCommand.Mode.BeginCreateConnections;
this.currentState = State.Connection; // Start a new connection
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect); // Reassign the cursor
}
var command = new DynamoModel.MakeConnectionCommand(nodeId,
portIndex, portModel.PortType, mode);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
multipleConnections = false;
owningWorkspace.IsCursorForced = false;
}
}
return(true);
}
/// <summary>
/// Unsubscribe port events.
/// </summary>
/// <param name="item">The PortViewModel.</param>
/// <returns></returns>
private PortViewModel UnSubscribePortEvents(PortViewModel item)
{
item.MouseEnter -= OnRectangleMouseEnter;
item.MouseLeave -= OnRectangleMouseLeave;
item.MouseLeftButtonDown -= OnMouseLeftButtonDown;
return item;
}
/// <summary>
/// Handles the port snapping on Mouse Enter.
/// </summary>
/// <param name="portViewModel">The port view model.</param>
/// <param name="eventType">Type of the event.</param>
private void nodeViewModel_SnapInputEvent(PortViewModel portViewModel)
{
switch (portViewModel.EventType)
{
case PortEventType.MouseEnter:
IsSnapping = this.CheckActiveConnectorCompatibility(portViewModel);
this.portViewModel = portViewModel;
break;
case PortEventType.MouseLeave:
IsSnapping = this.CheckActiveConnectorCompatibility(portViewModel, false);
this.portViewModel = portViewModel;
break;
case PortEventType.MouseLeftButtonDown:
//If the connector is not active, then the state is changed to None. otherwise, the connector state is connection and
//is not deleted from the view.
this.portViewModel = portViewModel;
if (this.CheckActiveConnectorCompatibility(portViewModel))
{
this.HandlePortClicked(portViewModel);
}
else
{
this.CancelActiveState();
}
break;
default:
IsSnapping = this.CheckActiveConnectorCompatibility(portViewModel);
this.portViewModel = portViewModel;
break;
}
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
// We only entertain port clicking when the current state is idle,
// or when it is already having a connector being established.
if (currentState != State.None && (currentState != State.Connection))
return false;
PortModel portModel = portViewModel.PortModel;
DynamoViewModel dynamoViewModel = dynSettings.Controller.DynamoViewModel;
WorkspaceViewModel workspaceViewModel = dynamoViewModel.CurrentSpaceViewModel;
if (this.currentState != State.Connection) // Not in a connection attempt...
{
PortType portType = PortType.INPUT;
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Owner.GetPortIndexAndType(portModel, out portType);
dynamoViewModel.ExecuteCommand(new DynCmd.MakeConnectionCommand(
nodeId, portIndex, portType, DynCmd.MakeConnectionCommand.Mode.Begin));
if (null != owningWorkspace.activeConnector)
{
this.currentState = State.Connection;
owningWorkspace.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
owningWorkspace.IsCursorForced = false;
}
}
else // Attempt to complete the connection
{
// Check if connection is valid
if (owningWorkspace.CheckActiveConnectorCompatibility(portViewModel))
{
PortType portType = PortType.INPUT;
Guid nodeId = portModel.Owner.GUID;
int portIndex = portModel.Owner.GetPortIndexAndType(portModel, out portType);
dynamoViewModel.ExecuteCommand(new DynCmd.MakeConnectionCommand(
nodeId, portIndex, portType, DynCmd.MakeConnectionCommand.Mode.End));
owningWorkspace.CurrentCursor = null;
owningWorkspace.IsCursorForced = false;
this.currentState = State.None;
}
}
return true;
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
return stateMachine.HandlePortClicked(portViewModel);
}
internal bool CheckActiveConnectorCompatibility(PortViewModel portVM)
{
// Check if required ports exist
if (this.activeConnector == null || portVM == null)
return false;
PortModel srcPortM = this.activeConnector.ActiveStartPort;
PortModel desPortM = portVM.PortModel;
// No self connection
// No start to start or end or end connection
if (srcPortM.Owner != desPortM.Owner && srcPortM.PortType != desPortM.PortType)
{
// Change cursor to show compatible port connection
CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcAdding);
return true;
}
else
{
// Change cursor to show not compatible
CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
return false;
}
}
internal bool CheckActiveConnectorCompatibility(PortViewModel portVM,bool isSnapping = true)
{
// Check if required ports exist
if (this.activeConnector == null || portVM == null)
return false;
//By default the ports will be in snapping mode. But if the connection is not completed,
//then on mouse leave, the cursor should be pointed as arcselect instead of arcadd.
if (!isSnapping)
{
CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
return false;
}
PortModel srcPortM = this.activeConnector.ActiveStartPort;
PortModel desPortM = portVM.PortModel;
// No self connection
// No start to start or end or end connection
if (srcPortM.Owner != desPortM.Owner && srcPortM.PortType != desPortM.PortType)
{
// Change cursor to show compatible port connection
CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcAdding);
return true;
}
else
{
// Change cursor to show not compatible
CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
return false;
}
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
this.snappedPort = null;
bool mouseMessageHandled = false;
WorkspaceViewModel wvm = (DataContext as WorkspaceViewModel);
// If we are currently connecting and there is an active
// connector, redraw it to match the new mouse coordinates.
if (wvm.IsSnapping)
{
if (wvm.portViewModel != null)
{
if (wvm.CheckActiveConnectorCompatibility(wvm.portViewModel))
{
mouseMessageHandled = true;
wvm.HandleMouseMove(workBench, wvm.portViewModel.Center);
}
}
else
wvm.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
}
if (wvm.IsInIdleState)
{
// Find the dependency object directly under the mouse
// cursor, then see if it represents a port. If it does,
// then determine its type, we would like to show the
// "ArcRemoving" cursor when the mouse is over an out port.
Point mouse = e.GetPosition((UIElement)sender);
var dependencyObject = ElementUnderMouseCursor(mouse);
PortViewModel pvm = PortFromHitTestResult(dependencyObject);
if (null != pvm && (pvm.PortType == PortType.Input))
this.Cursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
else
this.Cursor = null;
}
if (false == mouseMessageHandled)
wvm.HandleMouseMove(workBench, e);
}
/// <summary>
/// Registers the port events.
/// </summary>
/// <param name="item">PortModel.</param>
/// <returns></returns>
private PortViewModel SubscribePortEvents(PortModel item)
{
PortViewModel portViewModel = new PortViewModel(this, item);
portViewModel.MouseEnter += OnRectangleMouseEnter;
portViewModel.MouseLeave += OnRectangleMouseLeave;
portViewModel.MouseLeftButtonDown += OnMouseLeftButtonDown;
return portViewModel;
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
this.snappedPort = null;
bool mouseMessageHandled = false;
WorkspaceViewModel wvm = (DataContext as WorkspaceViewModel);
var currentState = wvm.CurrentState;
switch (wvm.CurrentState)
{
// If we are currently connecting and there is an active
// connector, redraw it to match the new mouse coordinates.
case WorkspaceViewModel.StateMachine.State.Connection:
{
Point mouse = e.GetPosition((UIElement)sender);
this.snappedPort = GetSnappedPort(mouse);
// Check for nearby port to snap
if (this.snappedPort != null)
{
// Nearby port must be compatible for connection
if (wvm.CheckActiveConnectorCompatibility(this.snappedPort))
{
mouseMessageHandled = true;
wvm.HandleMouseMove(this.WorkBench, this.snappedPort.Center);
}
else
this.snappedPort = null; // remove non-compatible port
}
else
wvm.CurrentCursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
break;
}
case WorkspaceViewModel.StateMachine.State.None:
{
// Find the dependency object directly under the mouse
// cursor, then see if it represents a port. If it does,
// then determine its type, we would like to show the
// "ArcRemoving" cursor when the mouse is over an out port.
Point mouse = e.GetPosition((UIElement)sender);
var dependencyObject = ElementUnderMouseCursor(mouse);
PortViewModel pvm = PortFromHitTestResult(dependencyObject);
if (null != pvm && (pvm.PortType == PortType.INPUT))
this.Cursor = CursorLibrary.GetCursor(CursorSet.ArcSelect);
else
this.Cursor = null;
break;
}
}
if (false == mouseMessageHandled)
wvm.HandleMouseMove(this.WorkBench, e);
}
internal bool HandlePortClicked(PortViewModel portViewModel)
{
return(stateMachine.HandlePortClicked(portViewModel));
}
private void OnMouseRelease(object sender, MouseButtonEventArgs e)
{
this.snappedPort = null;
WorkspaceViewModel wvm = (DataContext as WorkspaceViewModel);
wvm.HandleMouseRelease(this.WorkBench, e);
}