private bool DoLayout(Text text, Polygon polygon, LayoutOptions options)
{
// Initialize internal variables
_text = text;
_polygon = polygon;
_options = options;
_bounds = _polygon.Bounds;
_fits = false;
// Build the h-lines according to the layout settings
BuildLines();
// Find out the starting line and the total number
// of lines needed to layout the text.
_totalLines = 1;
_startLine = FirstLine(_totalLines);
if (GetHLines(_totalLines).Count == 0)
return false;
do
{
// Check if the text fits within the h-lines
// in the range [_startLine, _startLine + _totalLines)
int iword = 0;
PointList hLine = null;
for (int i = _startLine; i < _startLine + _totalLines; i++)
{
hLine = GetHLines(_totalLines)[i] as PointList;
for (int j = 0; j < hLine.Count; j += 2)
{
PointF pt1 = hLine[j];
PointF pt2 = hLine[j + 1];
RectangleF rc = new RectangleF(
pt1.X, pt1.Y, pt2.X - pt1.X, pt2.Y - pt1.Y);
bool newLine = false;
iword = FitTextInRect(iword, rc, ref newLine);
if (newLine)
break;
if (iword >= _text.Words.Count)
{
_fits = true;
return true;
}
}
}
// If the text does not fit, increase the total
// number of lines and recalculate the starting
// line depending on v-alignment.
_totalLines++;
if (_totalLines > GetHLines(_totalLines).Count)
{
_totalLines--;
return false;
}
_startLine = FirstLine(_totalLines);
ArrayList hLines = GetHLines(_totalLines);
if (_startLine + _totalLines > hLines.Count)
{
ArrayList hLines2 = GetHLines(_totalLines + 1);
if (_totalLines > hLines2.Count)
{
// The text would not fit in the
// polygon, so use all of the available
// space to layout as much text as possible
_totalLines = Math.Max(hLines.Count, hLines2.Count);
_startLine = 0;
return false;
}
}
}
while ((_startLine = FirstLine(_totalLines)) != -1);
return false;
}
public bool LayoutInEllipse(Text text,
RectangleF bounds, LayoutOptions options)
{
return DoLayout(text, new Polygon(bounds, 25), options);
}
/// <summary>
/// Layouts text inside polygonal area.
/// </summary>
public bool LayoutInPolygon(Text text,
PointF[] polygon, LayoutOptions options)
{
if (polygon == null)
return false;
if (polygon.Length < 3)
return false;
if (text == null || text.RawText.Length == 0)
return true;
return DoLayout(text, new Polygon(new PointList(polygon)), options);
}
public bool LayoutInRectangle(Text text,
RectangleF rectangle, LayoutOptions options)
{
return DoLayout(text, new Polygon(rectangle), options);
}