private void DrawIcon(Vertex v1, Vertex v2)
{
BitmapSource source = null;
if (v1.NextConstraint == Vertex.SideConstraint.Horizontal)
{
source = Constants.HorizontalImage as BitmapSource;
}
else if (v1.NextConstraint == Vertex.SideConstraint.Vertical)
{
source = Constants.VerticalImage as BitmapSource;
}
else if (v1.Constraint == Vertex.VertexConstraint.Angle || v2.Constraint == Vertex.VertexConstraint.Angle)
{
source = Constants.AngleImage as BitmapSource;
}
else
{
return;
}
int stride = source.PixelWidth * (source.Format.BitsPerPixel / 8);
byte[] data = new byte[stride * source.PixelHeight];
source.CopyPixels(data, stride, 0);
int X;
int Y;
if (v1.Constraint == Vertex.VertexConstraint.Angle)
{
double d1 = v1.Prev.ToPoint().DistanceToPoint(v1.ToPoint());
double d2 = v1.ToPoint().DistanceToPoint(v2.ToPoint());
if (d2 < d1)
{
X = (int)((2 * v1.X + v2.X) / 3 - source.Width / 2);
Y = (int)((2 * v1.Y + v2.Y) / 3 - source.Height / 2);
}
else
{
var vec = Point.Subtract(v2.ToPoint(), v1.ToPoint()) * 1 / 3 * d1 / d2;
X = (int)(v1.X + vec.X - source.Width / 2);
Y = (int)(v1.Y + vec.Y - source.Height / 2);
}
}
else if (v2.Constraint == Vertex.VertexConstraint.Angle)
{
double d1 = v1.ToPoint().DistanceToPoint(v2.ToPoint());
double d2 = v2.ToPoint().DistanceToPoint(v2.Next.ToPoint());
if (d1 < d2)
{
X = (int)((v1.X + 2 * v2.X) / 3 - source.Width / 2);
Y = (int)((v1.Y + 2 * v2.Y) / 3 - source.Height / 2);
}
else
{
var vec = Point.Subtract(v1.ToPoint(), v2.ToPoint()) * 1 / 3 * d2 / d1;
X = (int)(v2.X + vec.X - source.Width / 2);
Y = (int)(v2.Y + vec.Y - source.Height / 2);
}
}
else
{
X = (int)((v1.X + v2.X - source.Width) / 2);
Y = (int)((v1.Y + v2.Y - source.Height) / 2);
}
if (X < 0)
{
X = 0;
}
if (Y < 0)
{
Y = 0;
}
if (X > BitmapWidth - source.PixelWidth)
{
X = BitmapWidth - source.PixelWidth;
}
if (Y > BitmapHeight - source.PixelHeight)
{
Y = BitmapHeight - source.PixelHeight;
}
bitmap.WritePixels(new Int32Rect(X, Y, source.PixelWidth, source.PixelHeight), data, stride, 0);
}
private void Canvas_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
var p = e.GetPosition(Canvas);
if (!drawMode)
{
foreach (var polygon in polygons)
{
Vertex clickedVertex = polygon.GetClickedVertex(p);
if (clickedVertex != null)
{
currentPolygon = polygon;
ContextMenu menu = new ContextMenu();
menu.Items.Add(new MenuItem()
{
Header = "Remove vertex",
Command = removeCommand,
CommandParameter = clickedVertex
});
if (clickedVertex.Constraint == Vertex.VertexConstraint.None)
{
menu.Items.Add(new MenuItem()
{
Header = "Add angle constraint",
Command = angleCommand,
CommandParameter = clickedVertex
});
}
else
{
menu.Items.Add(new MenuItem()
{
Header = "Clear constraint",
Command = clearVertexCommand,
CommandParameter = clickedVertex
});
}
menu.Margin = new Thickness(p.X, p.Y, 0, 0);
menu.IsOpen = true;
}
else
{
Vertex clickedSideFirstVertex = polygon.GetClickedSideFirstVertex(p);
if (clickedSideFirstVertex != null)
{
currentPolygon = polygon;
ContextMenu menu = new ContextMenu();
if (clickedSideFirstVertex.NextConstraint == Vertex.SideConstraint.None)
{
menu.Items.Add(new MenuItem()
{
Header = "Add horizontal constraint",
Command = horizontalCommand,
CommandParameter = clickedSideFirstVertex
});
menu.Items.Add(new MenuItem()
{
Header = "Add vertical constraint",
Command = verticalCommand,
CommandParameter = clickedSideFirstVertex
});
}
else
{
menu.Items.Add(new MenuItem()
{
Header = "Clear constraint",
Command = clearSideCommand,
CommandParameter = clickedSideFirstVertex
});
}
menu.Margin = new Thickness(p.X, p.Y, 0, 0);
menu.IsOpen = true;
}
}
}
}
}
