public override void Abort()
{
_preferredPlacements = null;
CurrentEditor.ReleaseMouseCapture();
CurrentAdorner = null;
Target = null;
MouseIsDown = false;
IsDrawing = false;
CurrentStatus = DefaultStatusText;
}
private void RemoveRingAdorner()
{
if (_currentAdorner != null)
{
var layer = AdornerLayer.GetAdornerLayer(CurrentEditor);
layer.Remove(_currentAdorner);
_currentAdorner.MouseLeftButtonDown -= _currentAdorner_MouseLeftButtonDown;
_currentAdorner.MouseLeftButtonUp -= _currentAdorner_MouseLeftButtonUp;
_currentAdorner.PreviewKeyDown -= CurrentAdorner_KeyDown;
_currentAdorner.MouseMove -= _currentAdorner_MouseMove;
_currentAdorner = null;
}
}
protected override void OnDetaching()
{
CurrentAdorner = null;
CurrentEditor.MouseLeftButtonDown -= CurrentEditor_MouseLeftButtonDown;
CurrentEditor.MouseMove -= CurrentEditor_MouseMove;
CurrentEditor.MouseLeftButtonUp -= CurrentEditor_MouseLeftButtonUp;
CurrentEditor.PreviewKeyDown -= CurrentEditor_KeyDown;
CurrentEditor = null;
if (_parent != null)
{
_parent.MouseLeftButtonDown -= CurrentEditor_MouseLeftButtonDown;
}
_parent = null;
}
private void CurrentEditor_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (MouseIsDown)
{
if (_preferredPlacements != null)
{
List<NewAtomPlacement> newAtomPlacements = new List<NewAtomPlacement>();
FillExistingAtoms(_preferredPlacements, newAtomPlacements, CurrentEditor);
EditViewModel.DrawRing(newAtomPlacements, false);
}
}
CurrentEditor.ReleaseMouseCapture();
CurrentAdorner = null;
Target = null;
MouseIsDown = false;
IsDrawing = false;
CurrentStatus = DefaultStatusText;
}
private void CurrentEditor_MouseMove(object sender, MouseEventArgs e)
{
CurrentPoint = e.GetPosition(CurrentEditor);
//check to see whether we've dragged off the target first
if (MouseIsDown & IsDrawing)
{
CurrentStatus = "Drag along arrow to size ring: [Esc] to cancel";
double xamlBondSize = EditViewModel.Model.XamlBondLength;
if (Target != null & GetTargetedVisual(e) != Target) //dragging off a bond or atom
{
//first, work out how far we've dragged the mouse
switch (Target)
{
case AtomVisual av:
RingSize = GetRingSize(av, CurrentPoint, xamlBondSize);
IdentifyPlacements(av.ParentAtom, xamlBondSize, out _preferredPlacements, RingSize);
if (_preferredPlacements != null)
{
Vector parallelToBV =
GetProjection(av.ParentAtom.BalancingVector(), av.Position, CurrentPoint);
Point endPoint = av.Position + parallelToBV;
CurrentAdorner = new NRingAdorner(CurrentEditor, EditViewModel.EditBondThickness,
_preferredPlacements, av.Position, endPoint);
}
break;
case BondVisual bv:
RingSize = GetRingSizeFromEdge(bv, CurrentPoint);
Vector perpToBV =
GetProjection(bv.ParentBond.BondVector.Perpendicular(), bv.ParentBond.MidPoint, CurrentPoint);
IdentifyPlacements(bv.ParentBond, out _preferredPlacements, RingSize, perpToBV);
if (_preferredPlacements != null)
{
Vector? perpToAV = bv.ParentBond.GetUncrowdedSideVector();
if (perpToAV != null)
{
var parentBondMidPoint = bv.ParentBond.MidPoint;
Vector parallelToPerp =
GetProjection(perpToAV.Value, parentBondMidPoint, CurrentPoint);
Point endPoint = parentBondMidPoint + parallelToPerp;
CurrentAdorner = new NRingAdorner(CurrentEditor, EditViewModel.EditBondThickness,
_preferredPlacements,
parentBondMidPoint, endPoint);
}
else
{
CurrentAdorner = null;
}
}
else
{
CurrentAdorner = null;
}
break;
}
}
else if (Target == null) //dragging in empty space
{
RingSize = GetRingSize(FirstPoint, CurrentPoint, xamlBondSize);
_preferredPlacements = MarkOutAtoms(FirstPoint, CurrentPoint - FirstPoint,
xamlBondSize, RingSize);
CurrentAdorner = new NRingAdorner(CurrentEditor, EditViewModel.EditBondThickness,
_preferredPlacements, FirstPoint, CurrentPoint);
}
else
{
switch (CurrentEditor.ActiveVisual)
{
case AtomVisual av:
CurrentStatus = "Drag from atom to size ring.";
break;
case BondVisual bv:
CurrentStatus = "Drag from bond to size ring.";
break;
default:
CurrentStatus = DefaultStatusText;
break;
}
}
}
}