protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
UpdateOriginalLocation(e.Location);
var element = FindElementAtOriginal(originalLocation);
if ((e.Button & MouseButtons.Left) != 0)
{
leftMouseButton = false;
if (_command == CommandMode.ScaleView)
{
_command = CommandMode.Edit;
return;
}
if (_command == CommandMode.MarqueSelection)
{
_command = CommandMode.Edit;
HandleSelection();
Refresh();
return;
}
if (_command == CommandMode.MoveSelection)
{
_command = CommandMode.Edit;
return;
}
if (_command == CommandMode.Wiring && _tempWire != null)
{
if (_tempWire.From != null && element is SocketIn @socketIn)
{
Connect(_tempWire.From, @socketIn);
}
if (_tempWire.To != null && element is SocketOut @socketOut)
{
Connect(@socketOut, _tempWire.To);
}
_tempWire = null;
_command = CommandMode.Edit;
Refresh();
return;
}
}
if ((e.Button & MouseButtons.Right) != 0)
{
rightMouseButton = false;
if (_command == CommandMode.ScaleView)
{
_command = CommandMode.Edit;
return;
}
}
if ((e.Button & MouseButtons.Middle) != 0)
{
if (_command == CommandMode.TranslateView)
{
_command = CommandMode.Edit;
return;
}
}
if (!dragging)
{
return;
}
try {
Point currentLocation;
PointF transformed_location;
if (abortDrag)
{
transformed_location = originalLocation;
var points = new PointF[] { originalLocation };
transformation.TransformPoints(points);
currentLocation = new Point((int)points[0].X, (int)points[0].Y);
}
else
{
currentLocation = e.Location;
var points = new PointF[] { currentLocation };
inverse_transformation.TransformPoints(points);
transformed_location = points[0];
}
switch (_command)
{
case CommandMode.MarqueSelection:
this.Invalidate();
return;
case CommandMode.ScaleView:
return;
case CommandMode.TranslateView:
return;
default:
case CommandMode.Edit:
break;
}
} finally {
dragging = false;
_command = CommandMode.Edit;
base.OnMouseUp(e);
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
this.Focus();
UpdateOriginalLocation(e.Location);
var element = FindElementAtOriginal(originalLocation);
if ((e.Button & MouseButtons.Left) != 0)
{
leftMouseButton = true;
if (_command == CommandMode.Edit)
{
if (element == null && Control.ModifierKeys != Keys.Shift)
{
SetNodeSelected(false);
Refresh();
}
if (element is AbstractNode abstractNode)
{
if (Control.ModifierKeys != Keys.Shift && !abstractNode.Selected)
{
SetNodeSelected(false);
}
if (Control.ModifierKeys == Keys.Shift)
{
abstractNode.Selected = !abstractNode.Selected;
}
else
{
abstractNode.Selected = true;
}
HandleSelection();
Refresh();
}
}
if (leftMouseButton && rightMouseButton)
{
_command = CommandMode.ScaleView;
return;
}
if (element == null)
{
_command = CommandMode.MarqueSelection;
return;
}
if (element is Wire wire)
{
_command = CommandMode.Wiring;
var from = wire.From.Pivot;
var to = wire.To.Pivot;
var fromDistance = Utils.Distance(from, originalLocation);
var toDistance = Utils.Distance(to, originalLocation);
if (fromDistance < toDistance)
{
_tempWire = new Wire {
From = null, To = wire.To
};
Disconnect(wire);
}
else
{
_tempWire = new Wire {
From = wire.From, To = null
};
Disconnect(wire);
}
}
if (element is SocketIn socketIn)
{
_command = CommandMode.Wiring;
if (socketIn.Hub || !socketIn.IsConnected())
{
_tempWire = new Wire {
From = null, To = socketIn
};
}
else
{
Wire connection = socketIn.GetAllConnections()[0];
_tempWire = new Wire {
From = connection.From, To = null
};
Disconnect(connection);
}
return;
}
if (element is SocketOut socketOut)
{
_command = CommandMode.Wiring;
_tempWire = new Wire {
From = socketOut
};
return;
}
if (element is AbstractNode node)
{
if (node.GetBoundsArea(originalLocation) == NodeBoundsArea.HEADER)
{
_command = CommandMode.MoveSelection;
BringNodeToFront(node);
}
else
{
// rest of node
}
}
}
if ((e.Button & MouseButtons.Right) != 0)
{
rightMouseButton = true;
if (leftMouseButton && rightMouseButton)
{
_command = CommandMode.ScaleView;
return;
}
if (_command == CommandMode.Edit && FindElementAtMousePoint(e.Location) == null)
{
rightMouseButton = false;
OpenContextMenu(e.Location);
return;
}
}
if (e.Button == MouseButtons.Middle)
{
_command = CommandMode.TranslateView;
}
var points = new[] { originalLocation };
transformation.TransformPoints(points);
originalMouseLocation = this.PointToScreen(new Point((int)points[0].X, (int)points[0].Y));
}