private bool TryToMergeWire(float x, float y, Pin pin)
{
float scaledX = (x - translate.X) / zoom;
float scaledY = (y - translate.Y) / zoom;
// find wire that contains touch point
Wire wireToMerge = null;
Pin startToMerge = null;
Pin endToMerge = null;
// try to merge wire Pin to current element Pin
foreach (var pair in Elements.Where(_ => _.Value is Wire))
{
var wire = pair.Value as Wire;
bool startBounds = wire.StartBounds.Contains(scaledX, scaledY) == true;
bool endBounds = wire.EndBounds.Contains(scaledX, scaledY) == true;
bool wireBounds = wire.WireBounds.Contains(scaledX, scaledY) == true;
// check for wire start pin
// exlude if wire start is same as pin to merge
if (startBounds == true && wire.Start != pin)
{
wireToMerge = wire;
startToMerge = wire.Start;
break;
}
// check for wire end pin
// exlude if wire end is same as pin to merge
if (endBounds == true && wire.End != pin)
{
wireToMerge = wire;
endToMerge = wire.End;
break;
}
}
// merge wire start
if (wireToMerge != null && startToMerge != null && startToMerge.Parent == null)
{
MergeWireStart(wireToMerge, startToMerge, pin);
// if pin is wire end than wire is removed
if (pin == wireToMerge.End)
{
Element value;
Elements.TryRemove(wireToMerge.Id, out value);
wireToMerge.Start.Wires.Remove(wireToMerge);
wireToMerge.End.Wires.Remove(wireToMerge);
//Console.WriteLine ("TryToMergeWire: pin==wireToMerge.End, Pin.Id {0} Remove wireToMerge.Id", pin.Id, wireToMerge.Id);
}
// check for other end Wires connections to be merged
UpdateMergedPinWires(pin, wireToMerge, startToMerge);
// if merged start does not have any connected wires than need to be removed
if (startToMerge.Wires.Count == 0)
{
Element value;
Elements.TryRemove(startToMerge.Id, out value);
//Console.WriteLine ("TryToMergeWire: startToMerge.Wires.Count==0, Pin.Id {0} Remove startToMerge.Id", pin.Id, startToMerge.Id);
}
// if pin does not have any connected wires than need to be removed
if (pin.Wires.Count == 0)
{
Element value;
Elements.TryRemove(pin.Id, out value);
//Console.WriteLine ("TryToMergeWire: pin.Wires.Count==0, Pin.Id {0} Remove pin.Id", pin.Id);
}
// otherwise update all wires connected to pin
else
{
UpdateWires(pin.Wires, 0f, 0f);
}
ResetStartAndEndPin();
return(true);
}
// merge wire end
if (wireToMerge != null && endToMerge != null && endToMerge.Parent == null)
{
MergeWireEnd(wireToMerge, endToMerge, pin);
// if pin is wire start than wire is removed
if (pin == wireToMerge.Start)
{
Element value;
Elements.TryRemove(wireToMerge.Id, out value);
wireToMerge.Start.Wires.Remove(wireToMerge);
wireToMerge.End.Wires.Remove(wireToMerge);
//Console.WriteLine ("TryToMergeWire: pin==wireToMerge.Start, Pin.Id {0} Remove wireToMerge.Id", pin.Id, wireToMerge.Id);
}
// check for other end Wires connections to be merged
UpdateMergedPinWires(pin, wireToMerge, endToMerge);
// if merged end does not have any connected wires than need to be removed
if (endToMerge.Wires.Count == 0)
{
Element value;
Elements.TryRemove(endToMerge.Id, out value);
//Console.WriteLine ("TryToMergeWire: endToMerge.Wires.Count==0, Pin.Id {0} Remove endToMerge.Id", pin.Id, endToMerge.Id);
}
// if pin does not have any connected wires than need to be removed
if (pin.Wires.Count == 0)
{
Element value;
Elements.TryRemove(pin.Id, out value);
//Console.WriteLine ("TryToMergeWire: pin.Wires.Count==0, Pin.Id {0} Remove pin.Id", pin.Id);
}
// otherwise update all wires connected to pin
else
{
UpdateWires(pin.Wires, 0f, 0f);
}
ResetStartAndEndPin();
return(true);
}
return(false);
}
public void HandleOneInputDown(float x, float y)
{
float scaledX = (x - translate.X) / zoom;
float scaledY = (y - translate.Y) / zoom;
bool haveWire = false;
bool havePin = false;
// update previous position
previousX = scaledX;
previousY = scaledY;
// set pan start position
SetPanStart(x, y);
// check for wires
// - if no current element selected
// - if have start pin to split wires
if (currentElement == null)
{
haveWire = HitTestWire(scaledX, scaledY, true);
}
else if (currentElement != null && (startPin != null && endPin == null))
{
haveWire = HitTestWire(scaledX, scaledY, false);
}
// check for current element pins
if (currentElement != null && currentElement.ShowPins == true &&
!(currentElement is Pin) &&
(startPin == null || endPin == null) &&
haveWire == false)
{
havePin = HitTestPin(scaledX, scaledY);
}
if (startPin != null && endPin != null &&
havePin == true && haveWire == false)
{
Snapshot();
InsertWire(startPin, endPin, false);
}
else if (havePin == false && haveWire == true)
{
// split wire
if (startPin != null && endPin == null)
{
Snapshot();
// deselect current wire
SetWireSelection(currentWire, false, null);
// split current wire
SplitWire(currentWire, scaledX, scaledY, true);
}
}
else if (havePin == false && haveWire == false)
{
bool haveElement = HitTestElement(scaledX, scaledY);
// reset current element and start&end pins
// if current element is not present and do not have start pin
if (haveElement == false && !(startPin != null && endPin == null))
{
ResetStartAndEndPin();
currentElement = null;
}
else if (haveElement == false && startPin != null && endPin == null)
{
Snapshot();
// create standalone pin
var pin = InsertPin(scaledX, scaledY, false);
InsertWire(startPin, pin, false);
// reset previous start pin
startPin.IsSelected = false;
// set new start pin
startPin = pin;
startPin.IsSelected = true;
currentElement = pin;
}
// reset start and end pins if have new element selected
// and start and end pin has beed already connected
else if (haveElement == true && startPin != null && endPin != null)
{
ResetStartAndEndPin();
}
}
}
private bool TryToDetachWire(float x, float y)
{
float scaledX = (x - translate.X) / zoom;
float scaledY = (y - translate.Y) / zoom;
// find wire that contains touch point
Wire wireToDetach = null;
Pin startToDetach = null;
Pin endToDetach = null;
// try to detach wire Pin from current element
foreach (var pair in Elements.Where(_ => _.Value is Wire))
{
var wire = pair.Value as Wire;
bool startBounds = wire.StartBounds.Contains(scaledX, scaledY) == true;
bool endBounds = wire.EndBounds.Contains(scaledX, scaledY) == true;
bool wireBounds = wire.WireBounds.Contains(scaledX, scaledY) == true;
// check for wire start pin
if (startBounds == true)
{
wireToDetach = wire;
startToDetach = wire.Start;
break;
}
// check for wire end pin
if (endBounds == true)
{
wireToDetach = wire;
endToDetach = wire.End;
break;
}
}
// detach wire start
if (wireToDetach != null && startToDetach != null && startToDetach.Parent != null)
{
// create standalone pin
var pin = InsertPin(scaledX, scaledY, false);
// set detached wire start to standalone pin
SwapWireStart(wireToDetach, startToDetach, pin);
// reset start pin
startToDetach.IsSelected = false;
// set standalone pin as current element
currentElement = pin;
currentElement.ShowPins = true;
UpdateWires(pin.Wires, 0f, 0f);
ResetStartAndEndPin();
return(true);
}
// detach wire end
if (wireToDetach != null && endToDetach != null && endToDetach.Parent != null)
{
// create standalone pin
var pin = InsertPin(scaledX, scaledY, false);
// set detached wire end to standalone pin
SwapWireEnd(wireToDetach, endToDetach, pin);
// reset start pin
endToDetach.IsSelected = false;
// set standalone pin as current element
currentElement = pin;
currentElement.ShowPins = true;
UpdateWires(pin.Wires, 0f, 0f);
ResetStartAndEndPin();
return(true);
}
return(false);
}