public LineBoxesContext(CustomRenderBox owner)
{
//set owner element if we want to preserver linebox ***
_owner = owner;
_context = LayoutTools.BorrowList(out _lineboxes);
_sharedLineBoxContextListContext = LayoutTools.BorrowList(out _sharedLineBoxContexts);
}
public void AdjustVerticalAlignment()
{
using (LayoutTools.BorrowList(out List <IAbstractRect> expandables))
{
LinkedListNode <IAbstractRect> node = _linkList.First;
while (node != null)
{
IAbstractRect r = node.Value;
if (!r.HasSpecificHeight)
{
//expand to full fit
r.SetLocationAndSize(r.Left, r.MarginTop, r.Width, LineHeight - (r.MarginTop + r.MarginBottom));
}
else
{
//has specific height
switch (r.VerticalAlignment)
{
case VerticalAlignment.Top:
r.SetLocation(r.Left, r.MarginTop);
break;
case VerticalAlignment.Bottom:
{
int diff = LineHeight - (r.Height + r.MarginTop);
if (diff > 0)
{
r.SetLocation(r.Left, r.Top + diff);
}
}
break;
case VerticalAlignment.Middle:
{
int diff = LineHeight - (r.Height + r.MarginTop);
if (diff > 0)
{
r.SetLocation(r.Left, r.Top + (diff / 2));
}
}
break;
}
}
node = node.Next;//**
}
}
}
public void AdjustHorizontalAlignment(int limitW)
{
//line, and spread data inside this line
//expand...
using (LayoutTools.BorrowList(out List <IAbstractRect> expandables))
using (LayoutTools.BorrowList(out List <IAbstractRect> middleAlignments))
using (LayoutTools.BorrowList(out List <IAbstractRect> rigthAlignments))
{
LinkedListNode <IAbstractRect> node = _linkList.First;
if (_maxRight < limitW)
{
while (node != null)
{
IAbstractRect r = node.Value;
if (!r.HasSpecificWidth)
{
//expand candidate
expandables.Add(r);
}
node = node.Next;//**
}
int count = expandables.Count;
if (count > 0)
{
int availableLen = limitW - _maxRight;
int avg = availableLen / count;
for (int i = 0; i < count; ++i)
{
IAbstractRect exp = expandables[i];
exp.SetSize(exp.Width + avg, exp.Height);
}
}
}
//-----------------------
//now distribute the remaining width to expandable elements
//do horizontal alignment again if we have some change
node = _linkList.First;
int x_pos = 0;
int total_right_align_w = 0;
int total_middle_align_w = 0;
int node_no = 0;
RectUIAlignment latestAlignment = RectUIAlignment.Begin;
while (node != null)
{
IAbstractRect r = node.Value;
switch (r.HorizontalAlignment)
{
case RectUIAlignment.Begin:
{
x_pos += r.MarginLeft;
r.SetLocation(x_pos, r.Top); //same y pos
x_pos += r.Width + r.MarginRight;
}
break;
case RectUIAlignment.Middle:
{
middleAlignments.Add(r);
total_middle_align_w += r.Width + r.MarginLeft + r.MarginRight;
}
break;
case RectUIAlignment.End:
{
rigthAlignments.Add(r);
total_right_align_w += r.Width + r.MarginLeft + r.MarginRight;
}
break;
}
if (node_no > 0 && latestAlignment != r.HorizontalAlignment)
{
_mixedHorizontalAlignment = true;
}
latestAlignment = r.HorizontalAlignment;
node = node.Next;//**
node_no++;
}
//-----------------------
if (rigthAlignments.Count > 0)
{
AlignLeftToRight(rigthAlignments, limitW - total_right_align_w);
}
if (middleAlignments.Count > 0)
{
AlignLeftToRight(middleAlignments, (limitW - total_middle_align_w) / 2);
}
}
}