void DrawGeometry(Graphics graphics, PolarTransform transform, Color color, Geometry geometry, double thickness)
{
if (graphics == null ||
geometry == null)
{
return;
}
GeometrySegmentator geometrySegmentator = new GeometrySegmentator(geometry);
GeometryTransformer geometrySegmentatorPolarTransformer = new GeometryTransformer(geometrySegmentator, transform);
graphics.DrawGeometry(color, geometrySegmentatorPolarTransformer, thickness);
}
void FillGeometry(Graphics graphics, PolarTransform transform, Color color, Geometry geometry)
{
if (graphics == null ||
geometry == null)
{
return;
}
GeometrySegmentator geometrySegmentator = new GeometrySegmentator(geometry);
GeometryTransformer geometrySegmentatorPolarTransformer = new GeometryTransformer(geometrySegmentator, transform);
graphics.FillGeometry(color, geometrySegmentatorPolarTransformer);
}
Tuple <Geometry, double> CreateCurveTransformedTextGeometry(string text)
{
double baseOffset;
Font font = CurveTransformedText_Font;
GraphicsPath textPath = new GraphicsPath();
textPath.AddString(text, font.FontFamily, FontStyle.Regular, font.Size * 96 / 72, Point.Zero, StringFormat.GenericTypographic);
if (TextUpperBaseLine)
{
baseOffset = 0;
textPath.Transform(Matrix4.CreateTranslation(0, -FontAscentInPixels - 3));
}
else
{
baseOffset = -textPath.Bounds.Y + 2;
textPath.Transform(Matrix4.CreateTranslation(0, baseOffset));
}
FlattenCurveGeometry curvedTextPath = new FlattenCurveGeometry(textPath);
if (TextUpperBaseLine)
{
curvedTextPath.ApproximationScale = 2.0;
}
else
{
curvedTextPath.ApproximationScale = 5.0;
}
GeometrySegmentator segmentedCurvedTextPath = new GeometrySegmentator(curvedTextPath);
//segmentedCurvedTextPath.ApproximationScale = 3.0;
return(new Tuple <Geometry, double>(segmentedCurvedTextPath, baseOffset));
}
protected override void OnPaint(GUI.PaintEventArgs e)
{
base.OnPaint(e);
Graphics graphics = e.Graphics;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
PolarTransform polarTransform = new PolarTransform();
polarTransform.FullCircle = -600;
polarTransform.BaseScale = -1;
polarTransform.SetBaseOffset(0, m_BaseYSlider.Value);
polarTransform.SetTranslation(ClientWidth / 2.0, ClientHeight / 2.0 - 30.0);
polarTransform.Spiral = m_SpiralSlider.Value;
// Draw Background
RectangleGeometry borderGeometry = new RectangleGeometry(0, 0, m_TextBox.Width, m_TextBox.Height);
// Just for little optimization
GeometrySegmentator borderGeometrySegmentator = new GeometrySegmentator(borderGeometry);
GeometryTransformer borderGeometrySegmentatorPolarTransformer = new GeometryTransformer(borderGeometrySegmentator, polarTransform);
graphics.FillGeometry(Color.WhiteSmoke, borderGeometrySegmentatorPolarTransformer);
// Selection
if (m_TextBox.HasSelectionAndVisible)
{
RectangleGeometry selectionGeometry = new RectangleGeometry(m_TextBox.SelectionBounds
// Just to prevent some artefacts
- new PointI(0, 1) + new SizeI(0, 2));
FillGeometry(graphics, polarTransform, m_TextBox.SelectionColor, selectionGeometry);
}
// Caret
if (m_TextBox.IsCaretVisible)
{
RectangleGeometry caretGeometry = new RectangleGeometry(m_TextBox.CaretBounds);
FillGeometry(graphics, polarTransform, Color.Black, caretGeometry);
}
// Draw Border
graphics.DrawGeometry(Color.DodgerBlue, borderGeometrySegmentatorPolarTransformer, 2);
// Text
Font font = m_TextBox.Font;
GraphicsPath textGeometry = new GraphicsPath();
textGeometry.AddString(
m_TextBox.Text,
font.FontFamily, font.Style, font.Size * 96.0 / 72.0, new Point(4, 1), StringFormat.GenericTypographic);
FlattenCurveGeometry textFlattenGeometry = new FlattenCurveGeometry(textGeometry);
// Need for clip text
Geometry clippedTextFlattenGeometry = new FlattenCurveGeometry(
new CombinedGeometry(textFlattenGeometry, new RectangleGeometry(1, 1, m_TextBox.Width - 2, m_TextBox.Height - 2), CombinedGeometry.CombineMode.And));
FillGeometry(graphics, polarTransform, m_TextBox.TextColor, clippedTextFlattenGeometry);
}
