private void updateViewBounds()
{
try
{
this.updateGraphBounds();
if (fViewBounds == null)
{
fViewBounds = fGraphBounds;
return;
}
ArborPoint vLT = fGraphBounds.LeftTop.sub(fViewBounds.LeftTop).mul(Mag);
ArborPoint vRB = fGraphBounds.RightBottom.sub(fViewBounds.RightBottom).mul(Mag);
double aX = vLT.magnitude() * this.fScreenWidth;
double aY = vRB.magnitude() * this.fScreenHeight;
if (aX > 1 || aY > 1)
{
ArborPoint nbLT = fViewBounds.LeftTop.add(vLT);
ArborPoint nbRB = fViewBounds.RightBottom.add(vRB);
fViewBounds = new PSBounds(nbLT, nbRB);
}
}
catch (Exception ex)
{
Debug.WriteLine("ArborSystem.updateViewBounds(): " + ex.Message);
}
}
private void updateGraphBounds()
{
ArborPoint lt = new ArborPoint(-1, -1);
ArborPoint rb = new ArborPoint(1, 1);
foreach (ArborNode node in this.fNodes)
{
ArborPoint pt = node.Pt;
if (pt.exploded())
{
continue;
}
if (pt.X < lt.X)
{
lt.X = pt.X;
}
if (pt.Y < lt.Y)
{
lt.Y = pt.Y;
}
if (pt.X > rb.X)
{
rb.X = pt.X;
}
if (pt.Y > rb.Y)
{
rb.Y = pt.Y;
}
}
lt.X -= 1.2;
lt.Y -= 1.2;
rb.X += 1.2;
rb.Y += 1.2;
ArborPoint sz = rb.sub(lt);
ArborPoint cent = lt.add(sz.div(2));
ArborPoint d = new ArborPoint(Math.Max(sz.X, 4.0), Math.Max(sz.Y, 4.0)).div(2);
this.fGraphBounds = new PSBounds(cent.sub(d), cent.add(d));
}