protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
pe.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
pe.Graphics.Clear(BackColor);
if (BackgroundImage != null)
{
var desiredAspect = (double)Width / (double)Height;
var actualAspect = (double)BackgroundImage.Width / (double)BackgroundImage.Height;
int x, y, w, h;
switch (BackgroundImageLayout)
{
case ImageLayout.Stretch:
if (actualAspect > desiredAspect)
{
x = -(int)(Width / actualAspect / 2) + Width / 2;
w = (int)(Width / actualAspect);
h = Height;
y = 0;
}
else
{
y = -(int)(Height * actualAspect / 2) + Height / 2;
h = (int)(Height * actualAspect);
w = Width;
x = 0;
}
break;
case ImageLayout.Zoom:
if (actualAspect > desiredAspect)
{
w = Width;
h = (int)(Height * desiredAspect / actualAspect);;
}
else
{
w = (int)(Width * actualAspect / desiredAspect);
h = Height;
}
x = (Width - w) / 2;
y = (Height - h) / 2;
break;
default: // TODO - more image layouts
if (actualAspect > desiredAspect)
{
x = -(int)(Width / actualAspect / 2) + Width / 2;
w = (int)(Width / actualAspect);
h = Height;
y = 0;
}
else
{
y = -(int)(Height * actualAspect / 2) + Height / 2;
h = (int)(Height * actualAspect);
w = Width;
x = 0;
}
break;
}
pe.Graphics.DrawImage(backgroundImage, x, y, w, h);
}
if (Galaxy.Current != null)
{
var drawsize = StarSystemDrawSize;
var whitePen = new Pen(Color.White);
// draw star systems
var avgx = (Galaxy.Current.StarSystemLocations.Min(l => l.Location.X) + Galaxy.Current.StarSystemLocations.Max(l => l.Location.X)) / 2f;
var avgy = (Galaxy.Current.StarSystemLocations.Min(l => l.Location.Y) + Galaxy.Current.StarSystemLocations.Max(l => l.Location.Y)) / 2f;
foreach (var ssl in Galaxy.Current.StarSystemLocations)
{
// where will we draw the star system?
var x = ssl.Location.X; // - minx;
var y = ssl.Location.Y; // - miny;
//var x = (int)Math.Round(((float)p.X - Width / 2f - drawsize / 2f) / drawsize);
var drawx = (x - avgx) * drawsize + Width / 2f;
var drawy = (y - avgy) * drawsize + Height / 2f;
// find star system
var sys = ssl.Item;
// draw it if possible
if (Mode != null)
{
Mode.Draw(sys, pe.Graphics, new PointF(drawx, drawy), drawsize);
}
// draw selection reticule
if (sys == SelectedStarSystem)
{
pe.Graphics.DrawRectangle(whitePen, drawx - drawsize / 2f - 1, drawy - drawsize / 2f - 1, drawsize + 2, drawsize + 2);
}
}
// draw warp points
// TODO - draw warp points using draw mode? maybe draw blockaded warp points in red?
if (warpGraph == null)
{
ComputeWarpPointConnectivity();
}
foreach (var ssl in warpGraph)
{
var startPos = new PointF
(
(ssl.Location.X - avgx) * drawsize + Width / 2f,
(ssl.Location.Y - avgy) * drawsize + Height / 2f
);
foreach (var target in warpGraph.GetExits(ssl))
{
if (target == null)
{
continue; // TODO - draw short line guessing where warp point might lead based on its location in the system? if in center, make something up?
}
var endPos = new PointF
(
(target.Location.X - avgx) * drawsize + Width / 2f,
(target.Location.Y - avgy) * drawsize + Height / 2f
);
// overlapping systems or same system
if (startPos == endPos)
{
continue;
}
// push the ends out past the system circles
var dx = endPos.X - startPos.X;
var dy = endPos.Y - startPos.Y;
var length = Math.Max(Math.Abs(dx), Math.Abs(dy));
var ndx = dx / length * drawsize / 2f;
var ndy = dy / length * drawsize / 2f;
var realStartPos = new PointF(startPos.X + ndx, startPos.Y + ndy);
var realEndPos = new PointF(endPos.X - ndx, endPos.Y - ndy);
// draw line
pe.Graphics.DrawLine(Pens.Gray, realStartPos, realEndPos);
if (!warpGraph.GetExits(target).Contains(ssl))
{
// one way warp point, so draw an arrow
var angle = startPos.AngleTo(endPos);
var radians = Math.PI * angle / 180d;
var realMidPos = new PointF((realStartPos.X + realEndPos.X) / 2f, (realStartPos.Y + realEndPos.Y) / 2f);
var adx1 = -(float)Math.Cos(radians + Math.PI / 6d) * drawsize / 2f;
var ady1 = -(float)Math.Sin(radians + Math.PI / 6d) * drawsize / 2f;
var arrowEndPos1 = new PointF(realMidPos.X + adx1, realMidPos.Y + ady1);
var adx2 = -(float)Math.Cos(radians - Math.PI / 6d) * drawsize / 2f;
var ady2 = -(float)Math.Sin(radians - Math.PI / 6d) * drawsize / 2f;
var arrowEndPos2 = new PointF(realMidPos.X + adx2, realMidPos.Y + ady2);
pe.Graphics.DrawLine(whitePen, realMidPos, arrowEndPos1);
pe.Graphics.DrawLine(whitePen, realMidPos, arrowEndPos2);
}
}
}
}
}
