static string RenderRectangle(XIR.Rect rectangle)
{
var base64 = string.Empty;
var size = new CGSize(rectangle.Width, rectangle.Height);
var origin = new CGPoint(rectangle.X, rectangle.Y);
// We want the absolute values of the size
var workSize = new CGSize(Math.Abs(size.Width), Math.Abs(size.Height));
// This is our scale factor for output
var dstSize = new CGSize(100, 100);
// Define our Height label variables
var numHeightLabelBounds = CGSize.Empty;
var heightLabelBounds = CGSize.Empty;
var heightBounds = CGSize.Empty;
// Obtain our label lines and bounding boxes of the labels
var numHeightLine = GetLabel(string.Format("{0:0.########}", size.Height), out numHeightLabelBounds);
var heightLine = GetSubLabel("Height", out heightLabelBounds);
heightBounds.Width = NMath.Max(numHeightLabelBounds.Width, heightLabelBounds.Width);
heightBounds.Height = NMath.Max(numHeightLabelBounds.Height, heightLabelBounds.Height);
// Define our Width label variables
var numWidthLabelBounds = CGSize.Empty;
var widthLabelBounds = CGSize.Empty;
var widthBounds = CGSize.Empty;
// Obtain our label lines and bound boxes of the labels
var numWidthLine = GetLabel(string.Format("{0:0.########}", size.Width), out numWidthLabelBounds);
var widthLine = GetSubLabel("Width", out widthLabelBounds);
widthBounds.Width = NMath.Max(numWidthLabelBounds.Width, widthLabelBounds.Width);
widthBounds.Height = NMath.Max(numWidthLabelBounds.Height, widthLabelBounds.Height);
// Define our Width label variables
var originLabelBounds = CGSize.Empty;
var xyLabelBounds = CGSize.Empty;
var originBounds = CGSize.Empty;
// Obtain our label lines and bound boxes of the labels
var originLine = GetLabel(string.Format("({0:0.########}, {1:0.########})", origin.X, origin.Y), out originLabelBounds);
var xyLine = GetSubLabel("x, y", out xyLabelBounds);
originBounds.Width = NMath.Max(originLabelBounds.Width, xyLabelBounds.Width);
originBounds.Height = NMath.Max(originLabelBounds.Height, xyLabelBounds.Height);
// Calculate our scale based on our destination size
var ratio = 1f;
if (!workSize.IsEmpty)
{
if (workSize.Width > workSize.Height)
{
ratio = (float)workSize.Height / (float)workSize.Width;
dstSize.Height = (int)(dstSize.Height * ratio);
}
else
{
ratio = (float)workSize.Width / (float)workSize.Height;
dstSize.Width = (int)(dstSize.Width * ratio);
}
// Make sure we at least have something to draw if the values are very small
dstSize.Width = NMath.Max(dstSize.Width, 4f);
dstSize.Height = NMath.Max(dstSize.Height, 4f);
}
else
{
dstSize = CGSize.Empty;
}
// Define graphic element sizes and offsets
var lineWidth = 2;
var capSize = 8f;
var vCapIndent = 3f;
var separationSpace = 2f;
var dotSize = new CGSize(6, 6);
var extraBoundingSpaceWidth = (widthBounds.Width + separationSpace) * 2;
var extraBoundingSpaceHeight = (heightBounds.Height + separationSpace) * 2;
int width = (int)(dstSize.Width + lineWidth + capSize + vCapIndent + extraBoundingSpaceWidth);
int height = (int)(dstSize.Height + lineWidth + capSize + extraBoundingSpaceHeight + originBounds.Height * 2);
var bytesPerRow = 4 * width;
using (var context = new CGBitmapContext(
IntPtr.Zero, width, height,
8, bytesPerRow, CGColorSpace.CreateDeviceRGB(),
CGImageAlphaInfo.PremultipliedFirst))
{
// Clear the context with our background color
context.SetFillColor(BackgroundColor.CGColor);
context.FillRect(new CGRect(0, 0, width, height));
// Setup our matrices so our 0,0 is top left corner. Just makes it easier to layout
context.ConcatCTM(context.GetCTM().Invert());
var matrix = new CGAffineTransform(
1, 0, 0, -1, 0, height);
context.ConcatCTM(matrix);
context.SetStrokeColor(pen.CGColor);
context.SetFillColor(pen.CGColor);
context.SetLineWidth(lineWidth);
context.SaveState();
// We need to offset the drawing of our size segment rulers leaving room for labels
var xOffSet = heightBounds.Width;
var yOffset = ((height + originBounds.Height * 2) - extraBoundingSpaceHeight) / 2f - dstSize.Height / 2f;
context.TranslateCTM(xOffSet, yOffset);
context.AddEllipseInRect(new CGRect(vCapIndent - dotSize.Width / 2f, vCapIndent - dotSize.Height / 2f, dotSize.Width, dotSize.Height));
context.FillPath();
context.AddRect(new CGRect(vCapIndent, vCapIndent, dstSize.Width, dstSize.Height));
context.StrokePath();
context.RestoreState();
// Setup our text matrix
var textMatrix = new CGAffineTransform(
1, 0, 0, -1, 0, 0);
context.TextMatrix = textMatrix;
// Draw the Origin labels
context.TextPosition = new CGPoint((xOffSet + vCapIndent) - originLabelBounds.Width / 2, originLabelBounds.Height);
originLine.Draw(context);
context.TextPosition = new CGPoint((xOffSet + vCapIndent) - xyLabelBounds.Width / 2, originLabelBounds.Height * 2);
xyLine.Draw(context);
// Draw the Height label
var heightCenter = yOffset + ((dstSize.Height / 2) + ((vCapIndent + lineWidth) * 2));
context.TextPosition = new CGPoint(heightBounds.Width / 2 - numHeightLabelBounds.Width / 2, heightCenter - heightBounds.Height / 2f);
numHeightLine.Draw(context);
context.TextPosition = new CGPoint(heightBounds.Width / 2 - heightLabelBounds.Width / 2, heightCenter + heightBounds.Height / 2f);
heightLine.Draw(context);
// Draw the Width label
var widthOffsetX = heightBounds.Width + ((dstSize.Width / 2) - ((lineWidth + vCapIndent) * 2));// xOffSet - vCapIndent - lineWidth + dstSize.Width / 2f;
context.TextPosition = new CGPoint(widthOffsetX + (widthBounds.Width / 2 - numWidthLabelBounds.Width / 2), height - widthBounds.Height - 2f);
numWidthLine.Draw(context);
context.TextPosition = new CGPoint(widthOffsetX + (widthBounds.Width / 2 - widthLabelBounds.Width / 2), height - widthLabelBounds.Height / 2f);
widthLine.Draw(context);
// Get rid of our lines
numHeightLine.Dispose();
heightLine.Dispose();
numWidthLine.Dispose();
widthLine.Dispose();
originLine.Dispose();
xyLine.Dispose();
// Convert to base64 for display
var bitmap = new NSBitmapImageRep(context.ToImage());
var data = bitmap.RepresentationUsingTypeProperties(NSBitmapImageFileType.Png);
base64 = data.GetBase64EncodedString(NSDataBase64EncodingOptions.None);
}
return(String.Format(
"<figure>" +
"<figcatpion>" +
"Rectangle: " +
"<span class='var'>X</span> = <span class='value'>{0:0.########}</span>, " +
"<span class='var'>Y</span> = <span class='value'>{1:0.########}</span>, " +
"<span class='var'>Width</span> = <span class='value'>{2:0.########}</span>, " +
"<span class='var'>Height</span> = <span class='value'>{3:0.########}</span>" +
"</figcaption>" +
"<img width='{4}' height='{5}' src='data:image/png;base64,{6}' />" +
"</figure>",
origin.X, origin.Y,
size.Width, size.Height,
(int)width,
(int)height,
base64
));
}
