/// <summary>
/// Gets rectangle of the arrow text
/// </summary>
/// <param name="g">GraphicsPath</param>
/// <param name="style">Style of the arrow</param>
/// <param name="textStyle">Style of the arrow text</param>
/// <param name="points">Arrow's point collection</param>
/// <param name="textColor">Text color</param>
/// <param name="segmentCount">Arrow segments count</param>
/// <param name="text">Arrow's text itself</param>
/// <param name="textFont">Arrow's text font</param>
/// <param name="rect">Bounding rect</param>
/// <param name="a">Text's rotation angle to be returned</param>
/// <returns>Arrow text's rectangle</returns>
private RectangleF getTextRect(Graphics g , ArrowStyle style, ArrowTextStyle textStyle, PointCollection points , Color textColor ,int segmentCount ,
string text , Font textFont , RectangleF rect , ref float a )
{
// DrawString crashes with a too small PageScale
if (g.PageScale < 0.01) return RectangleF.Empty;
System.Drawing.Brush brText = new System.Drawing.SolidBrush(textColor);
StringFormat sf = StringFormat.GenericDefault;
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Far;
float x =0 , y = 0;
a = 0;
ArrowUtils au = new ArrowUtils(style,points );
System.Drawing.SizeF textSize = g.MeasureString(text, textFont);
if (textStyle == ArrowTextStyle.Rotate)
{
// Find the segment near which the text will be drawn
int pt = points.Count / 2 - 1;
int jump = 1;
int ptBest = pt;
float r = 0, rBest = 0;
if (style != ArrowStyle.Bezier)
{
if (style == ArrowStyle.Cascading ||
(style == ArrowStyle.Polyline && segmentCount % 2 == 1))
{
do
{
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
points[pt], points[pt + 1], ref a, ref r);
if (r > rBest)
{
rBest = r;
ptBest = pt;
}
pt = pt + jump;
jump = -Math.Sign(jump) * (Math.Abs(jump) + 1);
if(pt < 0 || pt >= points.Count - 1)
break;
}
while(textSize.Width > r);
pt = ptBest;
x = (points[pt].X + points[pt + 1].X) / 2;
y = (points[pt].Y + points[pt + 1].Y) / 2;
}
else
{
pt = pt + 1;
x = points[pt].X;
y = points[pt].Y;
}
}
else
{
if(segmentCount % 2 == 1)
{
pt = (pt + 1) / 4;
PointF ptMid = ArrowUtils.GetBezierPt(points, pt, 0.5f);
x = ptMid.X;
y = ptMid.Y;
}
else
{
pt = (pt + 1) / 4;
PointF ptMid = points[(pt + 1) * 3];
x = ptMid.X;
y = ptMid.Y;
}
}
// Find out the angle
if (style != ArrowStyle.Bezier)
{
if( style == ArrowStyle.Cascading ||
(style == ArrowStyle.Polyline && segmentCount % 2 == 1))
{
PointF pt1 = points[pt];
PointF pt2 = points[pt + 1];
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
else
{
float r1 = 0, a1 = 0;
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
points[pt - 1], points[pt], ref a, ref r);
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
points[pt], points[pt + 1], ref a1, ref r1);
a = (a + a1) / 2;
}
}
else
{
if (segmentCount % 2 == 1)
{
PointF pt1 = ArrowUtils.GetBezierPt(points, pt, 0.45f);
PointF pt2 = ArrowUtils.GetBezierPt(points, pt, 0.55f);
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
else
{
PointF pt1 = ArrowUtils.GetBezierPt(points, pt, 0.95f);
PointF pt2 = ArrowUtils.GetBezierPt(points, pt + 1, 0.05f);
MindFusion.Geometry.Geometry2D.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
}
a = 180 - a;
if (a > 90 && a < 270)
a -= 180;
}
else if (textStyle == ArrowTextStyle.Center)
{
if(points.Count % 2 == 1)
{
x = points[points.Count / 2].X;
y = points[points.Count / 2].Y;
}
else
{
x = points[points.Count / 2 - 1].X + points[points.Count / 2].X;
y = points[points.Count / 2 - 1].Y + points[points.Count / 2].Y;
x /= 2;
y /= 2;
}
//g.DrawString(text, textFont, brText, new PointF(x, y), sf);
}
else if (textStyle == ArrowTextStyle.OverLongestSegment)
{
// find the center point of longest segment
int longest = au.getLongestSegment();
PointF center = au.getSegmentCenter(longest);
// see how much space the text requires
StringFormat cf = m_FlowChart.TextFormat;
SizeF size = g.MeasureString(text, textFont);
size.Width += ArrowUtils.getMillimeter(m_FlowChart.MeasureUnit);
size.Height += ArrowUtils.getMillimeter(m_FlowChart.MeasureUnit);
}
brText.Dispose();
RectangleF rc = new RectangleF(x - textSize.Width/2 ,y - textSize.Height/2,textSize.Width, textSize.Height);
return rc;
}
private RectangleF getTextRect(Graphics g, ArrowStyle style, ArrowTextStyle textStyle, PointCollection points, Color textColor, int segmentCount,
string text, Font textFont, RectangleF rect, ref float a)
{
// DrawString crashes with a too small PageScale
if (g.PageScale < 0.01)
{
return(RectangleF.Empty);
}
System.Drawing.Brush brText = new System.Drawing.SolidBrush(textColor);
StringFormat sf = StringFormat.GenericDefault;
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Far;
float x = 0, y = 0;
a = 0;
ArrowUtils au = new ArrowUtils(style, points);
System.Drawing.SizeF textSize = g.MeasureString(text, textFont);
if (textStyle == ArrowTextStyle.Rotate)
{
// Find the segment near which the text will be drawn
int pt = points.Count / 2 - 1;
int jump = 1;
int ptBest = pt;
float r = 0, rBest = 0;
if (style != ArrowStyle.Bezier)
{
if (style == ArrowStyle.Cascading ||
(style == ArrowStyle.Polyline && segmentCount % 2 == 1))
{
do
{
MindFusion.Diagramming.Export.Convert.DekartToPolar(
points[pt], points[pt + 1], ref a, ref r);
if (r > rBest)
{
rBest = r;
ptBest = pt;
}
pt = pt + jump;
jump = -Math.Sign(jump) * (Math.Abs(jump) + 1);
if (pt < 0 || pt >= points.Count - 1)
{
break;
}
}while(textSize.Width > r);
pt = ptBest;
x = (points[pt].X + points[pt + 1].X) / 2;
y = (points[pt].Y + points[pt + 1].Y) / 2;
}
else
{
pt = pt + 1;
x = points[pt].X;
y = points[pt].Y;
}
}
else
{
if (segmentCount % 2 == 1)
{
pt = (pt + 1) / 4;
PointF ptMid = ArrowUtils.GetBezierPt(points, pt, 0.5f);
x = ptMid.X;
y = ptMid.Y;
}
else
{
pt = (pt + 1) / 4;
PointF ptMid = points[(pt + 1) * 3];
x = ptMid.X;
y = ptMid.Y;
}
}
// Find out the angle
if (style != ArrowStyle.Bezier)
{
if (style == ArrowStyle.Cascading ||
(style == ArrowStyle.Polyline && segmentCount % 2 == 1))
{
PointF pt1 = points[pt];
PointF pt2 = points[pt + 1];
MindFusion.Diagramming.Export.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
else
{
float r1 = 0, a1 = 0;
MindFusion.Diagramming.Export.Convert.DekartToPolar(
points[pt - 1], points[pt], ref a, ref r);
MindFusion.Diagramming.Export.Convert.DekartToPolar(
points[pt], points[pt + 1], ref a1, ref r1);
a = (a + a1) / 2;
}
}
else
{
if (segmentCount % 2 == 1)
{
PointF pt1 = ArrowUtils.GetBezierPt(points, pt, 0.45f);
PointF pt2 = ArrowUtils.GetBezierPt(points, pt, 0.55f);
MindFusion.Diagramming.Export.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
else
{
PointF pt1 = ArrowUtils.GetBezierPt(points, pt, 0.95f);
PointF pt2 = ArrowUtils.GetBezierPt(points, pt + 1, 0.05f);
MindFusion.Diagramming.Export.Convert.DekartToPolar(
pt1, pt2, ref a, ref r);
}
}
a = 180 - a;
if (a > 90 && a < 270)
{
a -= 180;
}
// Draw the text
/*
*
*
* GraphicsState state = g.Save();
*
* g.TranslateTransform(x, y);
* g.RotateTransform(a);
* g.TranslateTransform(-x, -y);
* g.DrawString(text, textFont, brText, new PointF(x, y), sf);
*
* g.Restore(state);
*/
}
else if (textStyle == ArrowTextStyle.Center)
{
if (points.Count % 2 == 1)
{
x = points[points.Count / 2].X;
y = points[points.Count / 2].Y;
}
else
{
x = points[points.Count / 2 - 1].X + points[points.Count / 2].X;
y = points[points.Count / 2 - 1].Y + points[points.Count / 2].Y;
x /= 2;
y /= 2;
}
//g.DrawString(text, textFont, brText, new PointF(x, y), sf);
}
else if (textStyle == ArrowTextStyle.OverLongestSegment)
{
// find the center point of longest segment
int longest = au.getLongestSegment();
PointF center = au.getSegmentCenter(longest);
// see how much space the text requires
StringFormat cf = new StringFormat();
cf.Alignment = StringAlignment.Center;
cf.LineAlignment = StringAlignment.Center;
SizeF size = g.MeasureString(text, textFont);
size.Width += ArrowUtils.getMillimeter(pChart.MeasureUnit);
size.Height += ArrowUtils.getMillimeter(pChart.MeasureUnit);
// fill using the background brush
/*
*
*
* System.Drawing.Brush brush = pChart.BackBrush.CreateGDIBrush(rect);
* g.FillRectangle(brush, center.X - size.Width / 2,
* center.Y - size.Height /2, size.Width, size.Height);
* brush.Dispose();
*
* // draw the text
* g.DrawString(text, textFont, brText, center, cf);
*/
}
brText.Dispose();
RectangleF rc = new RectangleF(x - textSize.Width / 2, y - textSize.Height / 2, textSize.Width, textSize.Height);
return(rc);
}