private void ClearVariables()
{
Polygons.Clear();
ProgramMode = Mode.Pointer;
//Pointer Variables
IsDraggingOn = false;
CurrentDragObjectType = DragObjectType.Nothing;
DragStartingPoint = new Point();
DragPolygonId = -1;
DragObject = null;
//Drawing Variables
PolygonDrawing = false;
CurrentlyDrawingPolygon = null;
PolygonNumber = 0;
CurrentLine = null;
//Adding Relation Variables
RelationPolygonId = -1;
RelationSelectedEdge = null;
}
private bool ClearUnfinishedPolygon()
{
if (CurrentlyDrawingPolygon != null)
{
MessageBoxResult ans = MessageBox.Show("If you change mode during drawing,\n" +
"currently drawn polygon will be deleted!\n" +
"Do you want to continue drawing?", Globals.WindowName, MessageBoxButton.YesNo, MessageBoxImage.Question);
if (ans == MessageBoxResult.Yes)
{
return(false);
}
else
{
CurrentlyDrawingPolygon.DeleteDrawing();
CurrentLine?.DeleteDrawing();
CurrentLine = null;
CurrentlyDrawingPolygon = null;
PolygonDrawing = false;
}
}
return(true);
}
private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Canvas currentCanvas = sender as Canvas;
Point CurrentMousePosition = e.GetPosition(currentCanvas);
MyPoint p = new MyPoint(CurrentMousePosition.X, CurrentMousePosition.Y);
switch (ProgramMode)
{
case Mode.Pointer:
{
foreach (var pol in Polygons)
{
foreach (var edge in pol.Value.Edges)
{
//check if point hit
if (MyPoint.AreNear(edge.first, CurrentMousePosition, Globals.VerticleClickRadiusSize) == true)
{
CurrentDragObjectType = DragObjectType.Verticle;
IsDraggingOn = true;
DragPolygonId = pol.Key;
DragObject = edge.first;
return;
}
}
foreach (var edge in pol.Value.Edges)
{
//check if edge hit
if (edge.IsNearPoint(CurrentMousePosition, Globals.LineClickDistance) == true)
{
CurrentDragObjectType = DragObjectType.Edge;
IsDraggingOn = true;
DragPolygonId = pol.Key;
DragObject = edge;
DragStartingPoint = CurrentMousePosition;
return;
}
}
//check if inside Polygon
if (pol.Value.IsPointInside(CurrentMousePosition) == true)
{
CurrentDragObjectType = DragObjectType.Polygon;
IsDraggingOn = true;
DragPolygonId = pol.Key;
DragObject = pol.Value;
DragStartingPoint = CurrentMousePosition;
return;
}
}
CurrentDragObjectType = DragObjectType.Nothing;
}
break;
case Mode.Draw:
{
if (PolygonDrawing == false)
{
MyPolygon polygon = new MyPolygon(p, currentCanvas);
CurrentlyDrawingPolygon = polygon;
PolygonDrawing = true;
CurrentLine?.DeleteDrawing();
CurrentLine = Draw.SimpleEdge(CurrentMousePosition, CurrentMousePosition, currentCanvas);
}
else
{
var DrawResult = CurrentlyDrawingPolygon.AddVerticleAndDraw(p);
switch (DrawResult)
{
case PolygonDrawResult.DrawFinished:
CurrentLine.SetFirstPoint(CurrentMousePosition);
Polygons.Add(PolygonNumber, CurrentlyDrawingPolygon);
CurrentLine.DeleteDrawing();
PolygonDrawing = false;
CurrentlyDrawingPolygon = null;
PolygonNumber++;
break;
case PolygonDrawResult.NotEnoughEdges:
MessageBox.Show("Not enough edges to finish polygon", Globals.WindowName, MessageBoxButton.OK, MessageBoxImage.Warning);
break;
case PolygonDrawResult.DrawInProgress:
CurrentLine.SetFirstPoint(CurrentMousePosition);
break;
default:
break;
}
}
}
break;
case Mode.AddMiddleVerticle:
{
foreach (var pol in Polygons)
{
foreach (var edge in pol.Value.Edges)
{
//check if edge hit
if (edge.IsNearPoint(CurrentMousePosition, Globals.LineClickDistance) == true)
{
pol.Value.AddMiddleVerticleOnEdge(edge);
return;
}
}
}
}
break;
case Mode.AddEqualRelation:
case Mode.AddPerpendicularRelation:
{
RelationType relationType;
if (ProgramMode == Mode.AddEqualRelation)
{
relationType = RelationType.Equal;
}
else
{
relationType = RelationType.Perpendicular;
}
if (RelationPolygonId == -1)
{
foreach (var pol in Polygons)
{
foreach (var edge in pol.Value.Edges)
{
//check if edge hit
if (edge.relationType == RelationType.None)
{
if (edge.IsNearPoint(CurrentMousePosition, Globals.LineClickDistance) == true)
{
edge.SelectEdge();
RelationSelectedEdge = edge;
RelationPolygonId = pol.Key;
return;
}
}
}
}
}
else
{
foreach (var edge in Polygons[RelationPolygonId].Edges)
{
//check if edge hit
if (edge.relationType == RelationType.None)
{
if (edge.IsNearPoint(CurrentMousePosition, Globals.LineClickDistance) == true)
{
if (Object.ReferenceEquals(edge, RelationSelectedEdge) == false)
{
edge.relationEdge = RelationSelectedEdge;
RelationSelectedEdge.relationEdge = edge;
edge.relationType = relationType;
RelationSelectedEdge.relationType = relationType;
var result = Polygons[RelationPolygonId].ApplyRelationChanges(edge);
if (result == true)
{
edge.relationIcon = new RelationIcon(edge, relationType, RelationPolygonId, Polygons[RelationPolygonId], currentCanvas);
RelationSelectedEdge.relationIcon = new RelationIcon(RelationSelectedEdge, relationType, RelationPolygonId, Polygons[RelationPolygonId], currentCanvas);
}
else
{
edge.relationEdge = null;
RelationSelectedEdge.relationEdge = null;
edge.relationType = RelationType.None;
RelationSelectedEdge.relationType = RelationType.None;
}
}
RelationSelectedEdge.UnselectEdge();
RelationSelectedEdge = null;
RelationPolygonId = -1;
return;
}
}
}
}
}
break;
case Mode.DeleteVerticleOrRelation:
{
foreach (var pol in Polygons)
{
foreach (var edge in pol.Value.Edges)
{
//check if point hit
if (MyPoint.AreNear(edge.first, CurrentMousePosition, Globals.VerticleClickRadiusSize) == true)
{
if (Polygons[pol.Key].DeleteVerticle(edge.first) == true)
{
Polygons[pol.Key] = null;
Polygons.Remove(pol.Key);
}
return;
}
}
foreach (var edge in pol.Value.Edges)
{
//check if edge hit
if (edge.IsNearPoint(CurrentMousePosition, Globals.LineClickDistance) == true)
{
edge.DeleteRelation();
return;
}
}
}
}
break;
default:
break;
}
return;
}