public virtual void AddChild(SpaceGraphItem _item)
{
_item.m_parent = this;
if (m_children == null)
{
m_children = new List <SpaceGraphItem>();
}
m_children.Add(_item);
}
//=========================================================================================
//
// Space graph map:
// simple arrangment method: No squarification. Children are arranged
// alternately horizontally and vertically.
//
//=========================================================================================
//-----------------------------------------------------------------------------------------
void Simple_DrawChildren(Graphics _graphics, SpaceGraphItem parent, UInt32 flags)
{
//throw (new NotImplementedException());
Rectangle rc = parent.TmiGetRectangle();
bool horizontal = (flags == 0);
int width = horizontal ? rc.Width : rc.Height;
if (width < 0)
{
return;
}
double fBegin = horizontal ? rc.Left : rc.Top;
int veryEnd = horizontal ? rc.Right : rc.Bottom;
int i = 0;
for ( ; i < parent.TmiGetChildrenCount(); i++)
{
double fraction = (double)(parent.TmiGetChild(i).TmiGetSize()) / parent.TmiGetSize();
double fEnd = fBegin + fraction * width;
bool lastChild = (i == parent.TmiGetChildrenCount() - 1 || parent.TmiGetChild(i + 1).TmiGetSize() == 0);
if (lastChild)
{
fEnd = veryEnd;
}
int begin = (int)fBegin;
int end = (int)fEnd;
Rectangle rcChild = new Rectangle();
if (horizontal)
{
rcChild.X = begin;
rcChild.Width = end - begin;
rcChild.Y = rc.Top;
rcChild.Height = rc.Height;
}
else
{
rcChild.Y = begin;
rcChild.Height = end - begin;
rcChild.X = rc.Left;
rcChild.Width = rc.Width;
}
RecurseDrawGraph(_graphics, parent.TmiGetChild(i), rcChild, false, (uint)(flags == 0 ? 1 : 0));
if (lastChild)
{
i++;
break;
}
fBegin = fEnd;
}
if (i < parent.TmiGetChildrenCount())
{
parent.TmiGetChild(i).TmiSetRectangle(Rectangle.FromLTRB(-1, -1, -1, -1));
}
}
//-----------------------------------------------------------------------------------------
void SequoiaView_DrawChildren(Graphics _graphics, SpaceGraphItem parent, UInt32 flags)
{
// Rest rectangle to fill
Rectangle remaining = parent.TmiGetRectangle();
// Size of rest rectangle
UInt32 remainingSize = parent.TmiGetSize();
// Scale factor
double sizePerSquarePixel = (double)parent.TmiGetSize() / remaining.Width / remaining.Height;
// First child for next row
int head = 0;
// At least one child left
while (head < parent.TmiGetChildrenCount())
{
// How we divide the remaining rectangle
bool horizontal = (remaining.Width >= remaining.Height);
// Height of the new row
int height = horizontal ? remaining.Height : remaining.Width;
// Square of height in size scale for ratio formula
double hh = (height * height) * sizePerSquarePixel;
// Row will be made up of child(rowBegin)...child(rowEnd - 1)
int rowBegin = head;
int rowEnd = head;
// Worst ratio so far
double worst = double.MaxValue;
// Maximum size of children in row
UInt32 rmax = parent.TmiGetChild(rowBegin).TmiGetSize();
// Sum of sizes of children in row
UInt32 sum = 0;
// This condition will hold at least once.
while (rowEnd < parent.TmiGetChildrenCount())
{
// We check a virtual row made up of child(rowBegin)...child(rowEnd) here.
// Minimum size of child in virtual row
UInt32 rmin = parent.TmiGetChild(rowEnd).TmiGetSize();
// If sizes of the rest of the children is zero, we add all of them
if (rmin == 0)
{
rowEnd = parent.TmiGetChildrenCount();
break;
}
// Calculate the worst ratio in virtual row.
// Formula taken from the "Squarified Tree maps" paper.
// (http://http://www.win.tue.nl/~vanwijk/)
double ss = ((double)sum + rmin) * ((double)sum + rmin);
double ratio1 = hh * rmax / ss;
double ratio2 = ss / hh / rmin;
double nextWorst = Math.Max(ratio1, ratio2);
// Will the ratio get worse?
if (nextWorst > worst)
{
// Yes. Don't take the virtual row, but the
// real row (child(rowBegin)..child(rowEnd - 1))
// made so far.
break;
}
// Here we have decided to add child(rowEnd) to the row.
sum += rmin;
rowEnd++;
worst = nextWorst;
}
// Row will be made up of child(rowBegin)...child(rowEnd - 1).
// sum is the size of the row.
// Width of row
int width = (horizontal ? remaining.Width : remaining.Height);
if (sum < remainingSize)
{
width = (int)((double)sum / remainingSize * width);
}
// else: use up the whole width
// width may be 0 here.
// Build the rectangles of children.
Rectangle rc = remaining;
double fBegin;
if (horizontal)
{
rc.Width = width;
fBegin = remaining.Top;
}
else
{
rc.Height = width;
fBegin = remaining.Left;
}
// Now put the children into their places
for (int i = rowBegin; i < rowEnd; i++)
{
int begin = (int)fBegin;
double fraction = (double)(parent.TmiGetChild(i).TmiGetSize()) / sum;
double fEnd = fBegin + fraction * height;
int end = (int)fEnd;
bool lastChild = (i == rowEnd - 1 || parent.TmiGetChild(i + 1).TmiGetSize() == 0);
if (lastChild)
{
// Use up the whole height
end = (horizontal ? remaining.Top + height : remaining.Left + height);
}
if (horizontal)
{
rc.Y = begin;
rc.Height = end - begin;
}
else
{
rc.X = begin;
rc.Width = end - begin;
}
RecurseDrawGraph(_graphics, parent.TmiGetChild(i), rc, false, 0);
if (lastChild)
{
break;
}
fBegin = fEnd;
}
// Put the next row into the rest of the rectangle
if (horizontal)
{
remaining.X += width;
remaining.Width -= width;
}
else
{
remaining.Y += width;
remaining.Height -= width;
}
remainingSize -= sum;
head += (rowEnd - rowBegin);
if (remaining.Width <= 0 || remaining.Height <= 0)
{
if (head < parent.TmiGetChildrenCount())
{
parent.TmiGetChild(head).TmiSetRectangle(Rectangle.FromLTRB(-1, -1, -1, -1));
}
break;
}
}
}