/// <summary>
/// Creates a configuration tree item (level0) for this state
/// </summary>
/// <param name="state">parent. can't be null</param>
public StateConfigVm(StateVm state)
: base(state.ParentWindowVm)
{
State = state;
TreeLevel = 0;
IsFixed = state.Model.StateStations.Any(ss => ss.Blocks.Any());
ContentsList.CollectionChanged += ContentsList_CollectionChanged;
}
/// <summary>
/// Create a temporary state just for drag and drop
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="parentWindowVm"></param>
/// <returns></returns>
public static StateVm CreateTemp(double x, double y, FpcWindowVm parentWindowVm)
{
var vm = new StateVm
{
InitializingPhase = true,
ParentWindowVm = parentWindowVm,
Width = 1,
Height = 1,
Location = new Vector(x, y),
//since model is null, StateType will be Temp
};
return vm;
}
public ConnectorVm(Model.Connector model, StateVm start, StateVm end, DataServices.ConnectorDataService connectorDataService, bool isLoose = false)
{
Model = model;
Start = start;
End = end;
IsLoose = isLoose;
DeleteCommand = new Commands.Command(o =>
{
if(Model != null)
connectorDataService.DeleteModel(Model);
if (ConnectorRemoved != null)
ConnectorRemoved();
});
}
/// <summary>
/// Sets FocusedState to the specified state and do the following actions:
/// <para>Place the state into FpcWindowVm if it's not placed yet, Otherwise start dragging the state</para>
/// <para>Start drawing a connector if 'connector' is selected from menu bar</para>
/// </summary>
/// <param name="state"></param>
/// <param name="pos_drawingArea">location of mouse relative to drawing area</param>
/// <param name="pos_firstChild">location of mouse relative to first child of state</param>
/// <param name="pos_state">location of mouse relative to state</param>
public void MouseClicksState(StateVm state, Point pos_drawingArea, Point pos_firstChild, Point pos_state)
{
FocusedState = state;
//place the newly created state which was dragging
if (state == _newDraggingStateVm)
{
state.PlaceInFpc();
_newDraggingStateVm = null;
ToolSelection = true;
}
else
{
_initialDragPoint = pos_state;
//connector is dragging
if (ToolConnector)
{
RemoveHalfDrawnConnector();
//create a temporary state and attach it to the end of connector
var end = StateVm.CreateTemp(pos_drawingArea.X, pos_drawingArea.Y, this);
DragTarget = end;
States.Add(end);
Connectors.Add(new ConnectorVm(null, state, end, fpcDataService.connectorDataService, true));
RelativeDragPoint = new Point(0, 0);
}
//state is dragging
else
{
DragTarget = state;
RelativeDragPoint = pos_firstChild;
}
}
}
/// <summary>
/// Disconnects the dragging connector from the specified state
/// <para>Exits if no connector is being dragged</para>
/// <remarks>
/// By 'dragging connector', we mean dragging state with StateType=Temp which holds the end of the connector
/// </remarks>
/// </summary>
/// <param name="state">Target state as the end state for the connector</param>
public void MouseLeavesState(StateVm state)
{
//find the drag target (temp state)
var dt = DragTarget as StateVm;
if (dt == null) return;
if (dt.StateType != StateType.Temp) return;
//find the connector that is being dragged
var conn = Connectors.FirstOrDefault(x => x.End == dt);
if (conn != null)
{
//make the connector loose again
conn.IsLoose = true;
_connectorDropTargetStateVm = null;
}
}
/// <summary>
/// Connects the dragging connector to the specified state
/// <para>Exits if no connector is being dragged</para>
/// <remarks>
/// By 'dragging connector', we mean dragging state with StateType=Temp which holds the end of the connector
/// </remarks>
/// </summary>
/// <param name="state">Target state as the end state for the connector</param>
public void MouseEntersState(StateVm state)
{
//find the drag target (temp state)
var dt = DragTarget as StateVm;
if (dt == null) return;
if (dt.StateType != StateType.Temp) return;
//find the connector that is being dragged
var conn = Connectors.FirstOrDefault(x => x.End == dt);
if (conn != null)
{
//if not making a loop or repeating an existing connector
if (state != conn.Start && !Connectors.Any(x => x.End == state && x.Start == conn.Start))
{
//mark the connector to be attached
conn.IsLoose = false;
_connectorDropTargetStateVm = state;
}
}
}
/// <summary>
/// Adds a state to this fpc (both model and viewModel) and stick it to mouse
/// </summary>
private void addStateByTool()
{
var stateModel = new Model.State
{
StateType = StateType.Mid,
X = -50,
Y = -20,
FPC = Model,
};
this.Model.States.Add(stateModel);
_newDraggingStateVm = new StateVm(stateModel, this, false)
{
Opacity = 0.4d,
};
_newDraggingStateVm.Config = new StateConfigVm(_newDraggingStateVm);
this.States.Add(_newDraggingStateVm);
DragTarget = _newDraggingStateVm;
RelativeDragPoint = new Point(50, 20);
}
/// <summary>
/// Removes the current dotted line (an incomplete connector)
/// </summary>
public void RemoveHalfDrawnConnector()
{
var conn = Connectors.Where(x => x.End.StateType == StateType.Temp).FirstOrDefault();
if (conn == null) return;
States.Remove(conn.End);
Connectors.Remove(conn);
_connectorDropTargetStateVm = null;
}