public void AddNewShape(Point position)
{
switch (this.Mode)
{
case Mode.Select:
Select select = new Select(position);
this.shapes.Add(select);
break;
case Mode.FreeHand:
FreeLine freeLine = new FreeLine(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(freeLine);
break;
case Mode.Line:
Line line = new Line(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(line);
break;
case Mode.Rectangle:
Rectangle rectangle = new Rectangle(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(rectangle);
break;
case Mode.Square:
Square square = new Square(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(square);
break;
case Mode.Ellipse:
Ellipse ellipse = new Ellipse(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(ellipse);
break;
case Mode.Circle:
Circle circle = new Circle(position, this.Colour);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(circle);
break;
case Mode.Polygon:
Polygon polygon = new Polygon(position, this.Colour);
Line line1 = new Line(position, this.Colour);
polygon.addLine(line1);
this.undoStack.Push(new List <Shape>(this.shapes));
this.shapes.Add(polygon);
break;
}
this.Invalidate(); // Update the canvas
}
public void AddToCurrentShape(Point position)
{
if (this.shapes.Count == 0)
{
return;
}
Shape shape = this.shapes.Last();
if (shape is Select)
{
Select select = (Select)shape;
select.EndPoint = position;
}
else if (shape is FreeLine)
{
FreeLine freeLine = (FreeLine)shape;
freeLine.Points.Add(position);
}
else if (shape is Line)
{
Line line = (Line)shape;
line.EndPoint = position;
}
else if (shape is Rectangle)
{
Rectangle rectangle = (Rectangle)shape;
rectangle.EndPoint = position;
}
else if (shape is Square)
{
Square square = (Square)shape;
square.EndPoint = position;
}
else if (shape is Ellipse)
{
Ellipse ellipse = (Ellipse)shape;
ellipse.EndPoint = position;
}
else if (shape is Circle)
{
Circle circle = (Circle)shape;
circle.EndPoint = position;
}
else if (shape is Polygon)
{
Polygon polygon = (Polygon)shape;
polygon.getCurrentLine().EndPoint = position;
}
this.Invalidate(); // Update the canvas
}
public static bool FreeLineIntersectsSelect(FreeLine freeLine, Select select)
{
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(select.StartPoint.X, select.StartPoint.Y, select.Width, select.Height);
for (int i = 1; i < freeLine.Points.Count; i++)
{
if (LineIntersectsRect(freeLine.Points.ElementAt(i - 1), freeLine.Points.ElementAt(i), rect))
{
return(true);
}
}
return(false);
}
