private void DrawGrid(IBrush brush, IDrawingContextImpl context)
{
for (var i = 0; i <= Cols; i++)
{
for (var j = 0; j <= Rows; j++)
{
context.DrawLine(new ImmutablePen(brush), new Point(i * Resolution, 0), new Point(i * Resolution, Height));
context.DrawLine(new ImmutablePen(brush), new Point(0, j * Resolution), new Point(Width, j * Resolution));
}
}
}
public override void Render(IDrawingContextImpl context)
{
context.Transform = Transform;
context.DrawLine(Pen, P1, P2);
}
public void DrawLine(Location from, Location to)
{
drawingContext.DrawLine(from, to);
}
/// <summary> /// Draws a line. /// </summary> /// <param name="pen">The stroke pen.</param> /// <param name="p1">The first point of the line.</param> /// <param name="p2">The second point of the line.</param> public void DrawLine(Pen pen, Point p1, Point p2) => _impl.DrawLine(pen, p1, p2);
/// <summary>
/// Draws the <see cref="TextDecoration"/> at given origin.
/// </summary>
/// <param name="drawingContext">The drawing context.</param>
/// <param name="textDecoration">The text decoration.</param>
/// <param name="origin">The origin.</param>
private void DrawTextDecoration(IDrawingContextImpl drawingContext, ImmutableTextDecoration textDecoration, Point origin)
{
var textFormat = Style.TextFormat;
var fontMetrics = Style.TextFormat.FontMetrics;
var thickness = textDecoration.Pen?.Thickness ?? 1.0;
switch (textDecoration.PenThicknessUnit)
{
case TextDecorationUnit.FontRecommended:
switch (textDecoration.Location)
{
case TextDecorationLocation.Underline:
thickness = fontMetrics.UnderlineThickness;
break;
case TextDecorationLocation.Strikethrough:
thickness = fontMetrics.StrikethroughThickness;
break;
}
break;
case TextDecorationUnit.FontRenderingEmSize:
thickness = textFormat.FontRenderingEmSize * thickness;
break;
}
switch (textDecoration.Location)
{
case TextDecorationLocation.Overline:
origin += new Point(0, textFormat.FontMetrics.Ascent);
break;
case TextDecorationLocation.Strikethrough:
origin += new Point(0, -textFormat.FontMetrics.StrikethroughPosition);
break;
case TextDecorationLocation.Underline:
origin += new Point(0, -textFormat.FontMetrics.UnderlinePosition);
break;
}
switch (textDecoration.PenOffsetUnit)
{
case TextDecorationUnit.FontRenderingEmSize:
origin += new Point(0, textDecoration.PenOffset * textFormat.FontRenderingEmSize);
break;
case TextDecorationUnit.Pixel:
origin += new Point(0, textDecoration.PenOffset);
break;
}
var pen = new ImmutablePen(
textDecoration.Pen?.Brush ?? Style.Foreground.ToImmutable(),
thickness,
textDecoration.Pen?.DashStyle?.ToImmutable(),
textDecoration.Pen?.LineCap ?? default,
textDecoration.Pen?.LineJoin ?? PenLineJoin.Miter,
textDecoration.Pen?.MiterLimit ?? 10.0);
drawingContext.DrawLine(pen, origin, origin + new Point(GlyphRun.Bounds.Width, 0));
}