static GraphicsPath CreateRectGraphicPath(float x, float y, float w, float h)
{
var _path = new GraphicsPath();
_path.StartFigure();
_path.AddRectangle(new RectangleF(x, y, w, h));
_path.CloseFigure();
return _path;
}
//----------------------------
public override void ReEvaluateComputeValue(ref ReEvaluateArgs args)
{
var myspec = this.spec;
this.fillColor = myspec.ActualColor;
this.strokeColor = myspec.StrokeColor;
this.ActualX = ConvertToPx(myspec.X, ref args);
this.ActualY = ConvertToPx(myspec.Y, ref args);
this.ActualRadius = ConvertToPx(myspec.Radius, ref args);
this.ActualStrokeWidth = ConvertToPx(myspec.StrokeWidth, ref args);
//create new path
if (this.IsPathValid) { return; }
ClearCachePath();
myCachedPath = new GraphicsPath();
myCachedPath.StartFigure();
myCachedPath.AddEllipse(this.ActualX - this.ActualRadius, this.ActualY - this.ActualRadius, 2 * this.ActualRadius, 2 * ActualRadius);
myCachedPath.CloseFigure();
ValidatePath();
}
/// <summary>
/// Creates a rounded rectangle using the specified corner radius
/// </summary>
/// <param name="rect">Rectangle to round</param>
/// <param name="nwRadius">Radius of the north east corner</param>
/// <param name="neRadius">Radius of the north west corner</param>
/// <param name="seRadius">Radius of the south east corner</param>
/// <param name="swRadius">Radius of the south west corner</param>
/// <returns>GraphicsPath with the lines of the rounded rectangle ready to be painted</returns>
public static GraphicsPath GetRoundRect(RectangleF rect, float nwRadius, float neRadius, float seRadius, float swRadius)
{
// NW-----NE
// | |
// | |
// SW-----SE
var path = new GraphicsPath();
nwRadius *= 2;
neRadius *= 2;
seRadius *= 2;
swRadius *= 2;
//NW ---- NE
path.AddLine(rect.X + nwRadius, rect.Y, rect.Right - neRadius, rect.Y);
//NE Arc
if (neRadius > 0f)
{
path.AddArc(
RectangleF.FromLTRB(rect.Right - neRadius, rect.Top, rect.Right, rect.Top + neRadius),
-90, 90);
}
// NE
// |
// SE
path.AddLine(rect.Right, rect.Top + neRadius, rect.Right, rect.Bottom - seRadius);
//SE Arc
if (seRadius > 0f)
{
path.AddArc(
RectangleF.FromLTRB(rect.Right - seRadius, rect.Bottom - seRadius, rect.Right, rect.Bottom),
0, 90);
}
// SW --- SE
path.AddLine(rect.Right - seRadius, rect.Bottom, rect.Left + swRadius, rect.Bottom);
//SW Arc
if (swRadius > 0f)
{
path.AddArc(
RectangleF.FromLTRB(rect.Left, rect.Bottom - swRadius, rect.Left + swRadius, rect.Bottom),
90, 90);
}
// NW
// |
// SW
path.AddLine(rect.Left, rect.Bottom - swRadius, rect.Left, rect.Top + nwRadius);
//NW Arc
if (nwRadius > 0f)
{
path.AddArc(
RectangleF.FromLTRB(rect.Left, rect.Top, rect.Left + nwRadius, rect.Top + nwRadius),
180, 90);
}
path.CloseFigure();
return path;
}
static GraphicsPath CreateRoundRectGraphicPath(float x, float y, float w, float h, float c_rx, float c_ry)
{
var _path = new GraphicsPath();
var arcBounds = new RectangleF();
var lineStart = new PointF();
var lineEnd = new PointF();
var width = w;
var height = h;
var rx = c_rx * 2;
var ry = c_ry * 2;
// Start
_path.StartFigure();
// Add first arc
arcBounds.Location = new PointF(x, y);
arcBounds.Width = rx;
arcBounds.Height = ry;
_path.AddArc(arcBounds, 180, 90);
// Add first line
lineStart.X = Math.Min(x + rx, x + width * 0.5f);
lineStart.Y = y;
lineEnd.X = Math.Max(x + width - rx, x + width * 0.5f);
lineEnd.Y = lineStart.Y;
_path.AddLine(lineStart, lineEnd);
// Add second arc
arcBounds.Location = new PointF(x + width - rx, y);
_path.AddArc(arcBounds, 270, 90);
// Add second line
lineStart.X = x + width;
lineStart.Y = Math.Min(y + ry, y + height * 0.5f);
lineEnd.X = lineStart.X;
lineEnd.Y = Math.Max(y + height - ry, y + height * 0.5f);
_path.AddLine(lineStart, lineEnd);
// Add third arc
arcBounds.Location = new PointF(x + width - rx, y + height - ry);
_path.AddArc(arcBounds, 0, 90);
// Add third line
lineStart.X = Math.Max(x + width - rx, x + width * 0.5f);
lineStart.Y = y + height;
lineEnd.X = Math.Min(x + rx, x + width * 0.5f);
lineEnd.Y = lineStart.Y;
_path.AddLine(lineStart, lineEnd);
// Add third arc
arcBounds.Location = new PointF(x, y + height - ry);
_path.AddArc(arcBounds, 90, 90);
// Add fourth line
lineStart.X = x;
lineStart.Y = Math.Max(y + height - ry, y + height * 0.5f);
lineEnd.X = lineStart.X;
lineEnd.Y = Math.Min(y + ry, y + height * 0.5f);
_path.AddLine(lineStart, lineEnd);
// Close
_path.CloseFigure();
return _path;
}
