private void AddLineAfterVerticleDeletion(Line lineOne, Line lineTwo, int deletedVerticleId)
{
List <int> verticlesIds = new List <int>
{
lineOne.VerticleOneId == deletedVerticleId ? lineOne.VerticleTwoId : lineOne.VerticleOneId,
lineTwo.VerticleOneId == deletedVerticleId ? lineTwo.VerticleTwoId : lineTwo.VerticleOneId
};
Verticle verticleOne = _verticles.FirstOrDefault(v => v.Id == verticlesIds[0]);
Verticle verticleTwo = _verticles.FirstOrDefault(v => v.Id == verticlesIds[1]);
_lines.Add(DrawLine(verticleOne, verticleTwo));
}
private void MoveVerticle(object sender, MouseEventArgs e)
{
if (_isMovingVerticleSet)
{
// usuwanie wierzchołka i linii
canvas.Children.Remove(_movingVerticle.Rectangle);
int verticleId = _movingVerticle.Id;
List <Line> linesToDelete = new List <Line>(_lines.Where(l => l.VerticleOneId == verticleId || l.VerticleTwoId == verticleId));
List <int> verticlesIds = new List <int>();
foreach (var line in linesToDelete)
{
foreach (var rectangle in line.rectangles)
{
canvas.Children.Remove(rectangle);
}
verticlesIds.Add(line.VerticleOneId == verticleId ? line.VerticleTwoId : line.VerticleOneId);
_lines.Remove(line);
}
// -------------
// nowy punkt wierzchołka
Point p = Mouse.GetPosition((Canvas)sender);
int x = (int)p.X;
int y = (int)p.Y;
Rectangle newRectangle = SetPixel(x, y, VerticleSize, true);
newRectangle.ContextMenu = _verticleContextMenu;
newRectangle.MouseLeftButtonDown += LeftButtonDownVerticle;
newRectangle.MouseLeftButtonUp += LeftButtonUpVerticle;
_movingVerticle.SetNewRectangle(x, y, newRectangle);
// --------------------
// przerysowanie linii
foreach (var verId in verticlesIds)
{
Verticle ver = _verticles.FirstOrDefault(v => v.Id == verId);
_lines.Add(DrawLine(ver, _movingVerticle));
}
//--------------------------------
}
}
private void LineHelper(object sender, MouseEventArgs e)
{
if (_verticles.Count == 0)
{
return;
}
ClearHelpingLine();
Point p = Mouse.GetPosition((Canvas)sender);
int x = (int)p.X;
int y = (int)p.Y;
Verticle extraVerticle = new Verticle(int.MaxValue, x, y);
Verticle lastVerticle = _verticles.LastOrDefault();
_helpingLine = DrawLine(lastVerticle, extraVerticle);
}
private void LeftButtonDownVerticle(object sender, MouseButtonEventArgs e)
{
if (_isMovingVerticleSet)
{
_movingVerticle = null;
_isMovingVerticleSet = false;
return;
}
Rectangle rectangle = sender as Rectangle;
if (rectangle != null)
{
_movingVerticle = _verticles.FirstOrDefault(v => Equals(v.Rectangle, rectangle));
_isMovingVerticleSet = true;
}
}
private void DeleteLine(Verticle verticle)
{
int verticleId = verticle.Id;
List <Line> linesToDelete = new List <Line>(_lines.Where(l => l.VerticleOneId == verticleId || l.VerticleTwoId == verticleId));
foreach (var line in linesToDelete)
{
foreach (var rectangle in line.rectangles)
{
canvas.Children.Remove(rectangle);
}
_lines.Remove(line);
}
if (linesToDelete.Count == 2)
{
AddLineAfterVerticleDeletion(linesToDelete[0], linesToDelete[1], verticleId);
}
}
private void DeleteVerticle(object sender, RoutedEventArgs routedEventArgs)
{
if (_polygonMade && _verticles.Count < 3)
{
return;
}
MenuItem mi = sender as MenuItem;
if (mi != null)
{
Rectangle rc = ((ContextMenu)mi.Parent).PlacementTarget as Rectangle;
canvas.Children.Remove(rc);
Verticle verticle = _verticles.FirstOrDefault(v => Equals(v.Rectangle, rc));
DeleteLine(verticle);
_verticles.Remove(verticle);
}
}
private void EndDrawingPolygon(object sender, RoutedEventArgs routedEventArgs)
{
if (_verticles.Count < 3)
{
return;
}
_polygonMade = true;
canvas.MouseLeftButtonDown -= SetVerticle;
canvas.MouseMove -= LineHelper;
canvas.MouseLeftButtonDown += LeftButtonDownPolygon;
canvas.MouseLeftButtonUp += LeftButtonUpPolygon;
foreach (var ver in _verticles)
{
ver.Rectangle.MouseLeftButtonDown += LeftButtonDownVerticle;
ver.Rectangle.MouseLeftButtonUp += LeftButtonUpVerticle;
}
_verticles.FirstOrDefault(v => v.Id == 0).Rectangle.ContextMenu = _verticleContextMenu;
ClearHelpingLine();
MenuItem mi = sender as MenuItem;
if (mi != null)
{
Rectangle rc = ((ContextMenu)mi.Parent).PlacementTarget as Rectangle;
Verticle endVerticle = _verticles.FirstOrDefault(v => Equals(v.Rectangle, rc));
Verticle lastVerticle = _verticles.LastOrDefault();
_lines.Add(DrawLine(lastVerticle, endVerticle));
}
canvas.MouseMove += MoveVerticle;
}
private Line DrawLine(Verticle v1, Verticle v2)
{
int x1 = v1.X;
int x2 = v2.X;
int y1 = v1.Y;
int y2 = v2.Y;
List <Rectangle> listOfRectangles = new List <Rectangle>();
int d, dx, dy, ai, bi, xi, yi;
int x = x1, y = y1;
// ustalenie kierunku rysowania
if (x1 < x2)
{
xi = 1;
dx = x2 - x1;
}
else
{
xi = -1;
dx = x1 - x2;
}
// ustalenie kierunku rysowania
if (y1 < y2)
{
yi = 1;
dy = y2 - y1;
}
else
{
yi = -1;
dy = y1 - y2;
}
// pierwszy piksel
listOfRectangles.Add(SetPixel(x, y, LinePointSize));
// oś wiodąca OX
if (dx > dy)
{
ai = (dy - dx) * 2;
bi = dy * 2;
d = bi - dx;
// pętla po kolejnych x
while (x != x2)
{
// test współczynnika
if (d >= 0)
{
x += xi;
y += yi;
d += ai;
}
else
{
d += bi;
x += xi;
}
listOfRectangles.Add(SetPixel(x, y, LinePointSize));
}
}
// oś wiodąca OY
else
{
ai = (dx - dy) * 2;
bi = dx * 2;
d = bi - dy;
// pętla po kolejnych y
while (y != y2)
{
// test współczynnika
if (d >= 0)
{
x += xi;
y += yi;
d += ai;
}
else
{
d += bi;
y += yi;
}
listOfRectangles.Add(SetPixel(x, y, LinePointSize));
}
}
return(new Line(v1.Id, v2.Id, listOfRectangles));
}
private void LeftButtonUpVerticle(object sender, MouseButtonEventArgs e)
{
_movingVerticle = null;
_isMovingVerticleSet = false;
}