///////////////////////////////////////////////////////////////////////////////
// NAME
// CalculateCoordinates
// ARGUMENTS
// grfx - pointer to Device Context
// DESCRIPTION
// Caluclate the coordinates for the entire tree
// RETURN VALUE
// none
//
public void CalculateCoordinates(Graphics grfx)
{
InitCoordinates();
if (m_Root == null)
{
return; // nothing to calculate
}
// adjust graphics
grfx.PageUnit = GraphicsUnit.Millimeter;
grfx.PageScale = .01f;
// Calculate height for each level
m_Root.CalculateMaxHeight(this, grfx);
// Calculate vertical position for root and all daughters
m_Root.CalculateYCoordinate(InitialYCoord, this, grfx);
// Calculate horizontal position for root and all daughters
#if DoTrace
Console.WriteLine("Beginning calculations");
#endif
m_iHorizontalOffset = InitialXCoord;
m_Root.CalculateXCoordinate(this, grfx, 0);
if (UseRightToLeft)
{
UseRightToLeftOrientation();
}
}
///////////////////////////////////////////////////////////////////////////////
// NAME
// CalculateXCoordinate
// ARGUMENTS
// pTree - pointer to tree this node is in
// pDC - pointer to the device context
// iMaxColWidth - maximum width of the current column
// DESCRIPTION
// Determine the X-axis coordinate for this node
// It assumes that the width of this and all other nodes have
// already been established.
// It also assumes that higher branching nodes are not wider than the
// total width of their daughters (which may not always be true...)
// RETURN VALUE
// The X-axis coordinate at the mid-point of this node
//
public int CalculateXCoordinate(LingTreeTree Tree, Graphics grfx, int iMaxColWidth)
{
XMid = 0;
// Determine the width for this node
CalculateWidth(Tree, grfx);
if (Daughter != null)
{ // is a non-terminal node
LingTreeNode NextDaughter = Daughter.Sister;
if (NextDaughter != null)
{ // node branches
if (iMaxColWidth < m_iWidth)
{
iMaxColWidth = m_iWidth; // remember widest node in the column
}
}
else
{ // only one daughter, so could be in a column
if (iMaxColWidth < Width)
{
iMaxColWidth = Width; // remember widest node in the column
}
}
int iLeftMost = Daughter.CalculateXCoordinate(Tree, grfx,
iMaxColWidth);
int iRightMost = iLeftMost;
while (NextDaughter != null)
{ // calculate coordinates for other daughters
iRightMost = NextDaughter.CalculateXCoordinate(Tree, grfx,
iMaxColWidth);
NextDaughter = NextDaughter.Sister;
}
// take mid point between first & last daughter
XMid = (iLeftMost + iRightMost) / 2;
if (iRightMost > iLeftMost)
{
if (m_iWidth > (iRightMost - iLeftMost))
{
int iAdjust = (m_iWidth - (iRightMost - iLeftMost)) / 2;
m_iXMid += iAdjust;
NextDaughter = Daughter;
while (NextDaughter != null)
{
NextDaughter.AdjustXValues(Tree, iAdjust);
NextDaughter = NextDaughter.Sister;
}
}
}
}
else
{ // is a terminal node
if (iMaxColWidth < Width)
{
iMaxColWidth = Width; // this might be the widest node in the column
}
XMid = (int)Tree.HorizontalOffset + // Offset from last terminal node plus
iMaxColWidth / 2; // half the width of this column
Tree.HorizontalOffset = XMid + // have a new offset for next terminal node
Tree.HorizontalGap + // gap between terminal nodes plus
iMaxColWidth / 2; // half the width of the widest node in this column
}
XCoord = XMid - Width / 2; // adjust for width of this node
int iEnd = XCoord + Width;
if (Triangle)
{
iEnd += Tree.HorizontalGap / 2;
}
if (iEnd > Tree.XSize)
{
Tree.XSize = iEnd; // Keep track of total width for scrolling
}
#if DoTrace
Console.WriteLine("{0}\tXSize = {1},\tWidth = {2},\tXCoord = {3},\tYCoord = {4}, \tXMid = {4}", Content, Tree.XSize, Width, XCoord, YCoord, XMid);
#endif
return(XMid);
}
