//Gets the most upperleft and bottomright coordinates of shapes in a group recursively
public XYXY GetGroupXYHW()
{
XYXY xyhw = new XYXY();
foreach (Composite c in groupitems)
{
if (c.type != "Group")
{
if (xyhw.sx != 746746)
{
xyhw.sx = MainPage.ReturnSmallest(xyhw.sx, c.x);
}
else
{
xyhw.sx = c.x;
}
if (xyhw.sy != 746746)
{
xyhw.sy = MainPage.ReturnSmallest(xyhw.sy, c.y);
}
else
{
xyhw.sy = c.y;
}
if (xyhw.ex != 746746)
{
xyhw.ex = MainPage.ReturnLargest(xyhw.ex, c.x + c.width);
}
else
{
xyhw.ex = c.x + c.width;
}
if (xyhw.ey != 746746)
{
xyhw.ey = MainPage.ReturnLargest(xyhw.ey, c.y + c.height);
}
else
{
xyhw.ey = c.y + c.height;
}
}
else
{
XYXY rxyhw = c.GetGroupXYHW();
if (xyhw.sx != 746746)
{
xyhw.sx = MainPage.ReturnSmallest(xyhw.sx, c.x);
}
else
{
xyhw.sx = c.x;
}
if (xyhw.sy != 746746)
{
xyhw.sy = MainPage.ReturnSmallest(xyhw.sy, c.y);
}
else
{
xyhw.sy = c.y;
}
if (xyhw.ex != 746746)
{
xyhw.ex = MainPage.ReturnLargest(xyhw.ex, c.x + c.width);
}
else
{
xyhw.ex = c.x + c.width;
}
if (xyhw.ey != 746746)
{
xyhw.ey = MainPage.ReturnLargest(xyhw.ey, c.y + c.height);
}
else
{
xyhw.ey = c.y + c.height;
}
}
}
return(xyhw);
}
//Update after undo/redo or changes made
public void Update(bool change)
{
//true means that an actual change has been made and needs to be stored in the history
if (change)
{
timeindex++;;
if (history.timeline.Count >= timeindex)
{
history.timeline.RemoveRange(timeindex, history.timeline.Count - timeindex);
}
history.timeline.Add(new Snapshot(group.Copy(), itemcount));
}
//false means that the history needs to be read and written to the paintsurface
else
{
group = history.timeline[timeindex].composite.Copy();
itemcount = history.timeline[timeindex].itemcount;
paintSurface.Children.Clear();
List <Composite> tosurface = history.timeline[timeindex].composite.Concatenate();
foreach (Composite c in tosurface)
{
if (c.type != "Group")
{
Strategy strategy = DrawEllipse.getInstance();
if (c.type == "Rectangle")
{
strategy = DrawRectangle.getInstance();
}
foreach (Ornament o in c.ornaments)
{
switch (o.position)
{
case "top":
strategy = new UpperOrnamentDecorator(strategy, o.ornament);
break;
case "bottom":
strategy = new LowerOrnamentDecorator(strategy, o.ornament);
break;
case "left":
strategy = new LeftOrnamentDecorator(strategy, o.ornament);
break;
case "right":
strategy = new RightOrnamentDecorator(strategy, o.ornament);
break;
}
}
DrawPackage drawpackage = new DrawPackage();
drawpackage.x = c.x;
drawpackage.y = c.y;
drawpackage.height = c.height;
drawpackage.width = c.width;
drawpackage.id = c.id;
drawpackage.paintSurface = paintSurface;
Context context = new Context(strategy);
context.drawpackage = drawpackage;
Shape shape = context.Draw();
SolidColorBrush brush = new SolidColorBrush();
if (IsSelected(c))
{
brush.Color = Colors.DarkSlateGray;
}
else
{
brush.Color = Colors.SlateGray;
}
shape.Fill = brush;
shape.PointerPressed += mouseDown;
shape.PointerMoved += mouseMove;
shape.PointerReleased += mouseUp;
shape.PointerWheelChanged += mouseScroll;
paintSurface.Children.Add(shape);
}
else
{
Strategy strategy = DrawEllipse.getInstance();
foreach (Ornament o in c.ornaments)
{
switch (o.position)
{
case "top":
strategy = new UpperOrnamentDecorator(strategy, o.ornament);
break;
case "bottom":
strategy = new LowerOrnamentDecorator(strategy, o.ornament);
break;
case "left":
strategy = new LeftOrnamentDecorator(strategy, o.ornament);
break;
case "right":
strategy = new RightOrnamentDecorator(strategy, o.ornament);
break;
}
}
DrawPackage drawpackage = new DrawPackage();
XYXY xyxy = c.GetGroupXYHW();
drawpackage.x = xyxy.sx;
drawpackage.y = xyxy.sy;
drawpackage.height = xyxy.ey - xyxy.sy;
drawpackage.width = xyxy.ex - xyxy.sx;
drawpackage.id = c.id;
drawpackage.paintSurface = paintSurface;
Context context = new Context(strategy);
context.drawpackage = drawpackage;
Shape shape = context.Draw();
}
}
}
}
