public static void FillEllipsis(CGContext context, RectangleF rect, CGColor color, float lineWidth)
{
context.SaveState();
context.SetFillColor(color);
context.AddEllipseInRect(rect);
context.FillPath();
context.RestoreState();
}
public static void FillRect(CGContext context, RectangleF rect, CGColor color)
{
context.SaveState();
context.AddRect(rect);
context.Clip();
context.SetFillColor(color);
context.FillRect(rect);
context.RestoreState();
}
public static void DrawEllipsis(CGContext context, RectangleF rect, CGColor color, float lineWidth)
{
context.SaveState();
context.SetStrokeColor(color);
context.SetLineWidth(lineWidth);
context.AddEllipseInRect(rect);
context.StrokePath();
context.RestoreState();
}
public static void DrawRect(CGContext context, RectangleF rect, CGColor color, float lineWidth)
{
context.SaveState();
context.AddRect(rect);
context.Clip();
context.SetLineWidth(lineWidth);
context.SetStrokeColor(color);
context.StrokeRect(rect);
context.RestoreState();
}
internal static void Draw (CGContext ctx, GradientInfo gradient)
{
ctx.SaveState ();
ctx.Clip ();
using (var cg = new CGGradient (Util.DeviceRGBColorSpace, gradient.Colors.ToArray (), gradient.Stops.ToArray ())) {
if (gradient.Linear)
ctx.DrawLinearGradient (cg, gradient.Start, gradient.End, CGGradientDrawingOptions.DrawsBeforeStartLocation | CGGradientDrawingOptions.DrawsAfterEndLocation);
else
ctx.DrawRadialGradient (cg, gradient.Start, gradient.StartRadius, gradient.End, gradient.EndRadius, CGGradientDrawingOptions.DrawsBeforeStartLocation | CGGradientDrawingOptions.DrawsAfterEndLocation);
}
ctx.RestoreState ();
}
public static float MeasureStringWidth(CGContext context, string text, string fontName, float fontSize)
{
if (string.IsNullOrEmpty(text))
return 0;
context.SaveState();
PointF pos = context.TextPosition;
context.SelectFont(fontName, fontSize, CGTextEncoding.MacRoman);
context.TextMatrix = CGAffineTransform.MakeScale(1.0f, -1.0f);
//context.TranslateCTM(0, 20);
context.ScaleCTM(1, -1);
context.SetTextDrawingMode(CGTextDrawingMode.Invisible);
context.ShowTextAtPoint(pos.X, pos.Y, text);
PointF pos2 = context.TextPosition;
context.RestoreState();
return pos2.X - pos.X;
}
public static void DrawLine(CGContext context, List<PointF> points, CGColor color, float lineWidth, bool closePath, bool dashed)
{
if (points == null)
throw new NullReferenceException();
if (points.Count == 0)
throw new ArgumentException("The line must have at least one point.");
context.SaveState();
context.SetStrokeColor(color);
context.SetLineWidth(lineWidth);
context.MoveTo(points[0].X, points[0].Y);
for(int a = 1; a < points.Count; a++)
context.AddLineToPoint(points[a].X, points[a].Y);
if (dashed)
context.SetLineDash(0, new float[2] { 1, 2 }, 2);
if (closePath)
context.ClosePath();
context.StrokePath();
context.RestoreState();
}
public static void DrawText(CGContext context, string text, string fontName, float fontSize, float translateHeight, float x, float y)
{
context.SaveState();
context.SelectFont(fontName, fontSize, CGTextEncoding.MacRoman);
context.SetTextDrawingMode(CGTextDrawingMode.Fill);
context.SetFillColor(new CGColor(1, 1));
context.SetStrokeColor(new CGColor(1.0f, 1.0f));
//context.AddRect(rectText);
//context.Clip();
context.TextMatrix = CGAffineTransform.MakeScale(1.0f, -1.0f);
context.TranslateCTM(0, translateHeight);
context.ScaleCTM(1, -1);
context.ShowTextAtPoint(x, y, text);
context.RestoreState();
}
public static void DrawTextInRect(CGContext context, RectangleF rect, string text, string fontName, float fontSize, NSColor fontColor)
{
context.SaveState();
NSString str = new NSString(text);
var dict = new NSMutableDictionary();
dict.Add(NSAttributedString.ForegroundColorAttributeName, fontColor);
dict.Add(NSAttributedString.FontAttributeName, NSFont.FromFontName(fontName, fontSize));
str.DrawString(rect, dict);
context.RestoreState();
}
public static void FillGradient(CGContext context, RectangleF rect, CGColor color1, CGColor color2, bool isHorizontal)
{
CGGradient gradientBackground;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
float[] locationListBackground = new float[] { 1.0f, 0.0f };
List<float> colorListBackground = new List<float>();
colorListBackground.AddRange(color1.Components);
colorListBackground.AddRange(color2.Components);
gradientBackground = new CGGradient(colorSpace, colorListBackground.ToArray(), locationListBackground);
context.SaveState();
context.AddRect(rect);
context.Clip();
//context.ScaleCTM(1, -1);
if(isHorizontal)
context.DrawLinearGradient(gradientBackground, new PointF(rect.X, rect.Y), new PointF(rect.X + rect.Width, rect.Y + rect.Height), CGGradientDrawingOptions.DrawsBeforeStartLocation);
else
context.DrawLinearGradient(gradientBackground, new PointF(0, 0), new PointF(0, rect.Height), CGGradientDrawingOptions.DrawsBeforeStartLocation);
context.RestoreState();
}
public static void EOFillPath(CGContext context, CGPath path, CGColor color)
{
context.SaveState();
context.SetFillColor(color);
context.AddPath(path);
context.EOFillPath();
context.RestoreState();
}
public static void StrokePath(CGContext context, CGPath path, float pathWidth, CGColor color)
{
context.SaveState();
context.SetLineWidth(pathWidth);
context.SetStrokeColor(color);
context.AddPath(path);
context.StrokePath();
context.RestoreState();
}
public static void DrawLine(CGContext context, PointF[] points, float lineWidth, CGColor color)
{
context.SaveState();
var path = new CGPath();
path.AddLines(points);
context.AddPath(path);
context.SetLineWidth(lineWidth);
context.SetStrokeColor(color);
context.StrokePath();
context.RestoreState();
}
internal static void Draw (CGContext ctx, object layout, double x, double y)
{
LayoutInfo li = (LayoutInfo)layout;
using (CTFrame frame = CreateFrame (li)) {
if (frame == null)
return;
CTLine ellipsis = null;
bool ellipsize = li.Width.HasValue && li.TextTrimming == TextTrimming.WordElipsis;
if (ellipsize)
ellipsis = new CTLine (CreateAttributedString (li, "..."));
float lineHeight = li.Font.Ascender - li.Font.Descender + li.Font.Leading;
ctx.SaveState ();
ctx.TextMatrix = CGAffineTransform.MakeScale (1f, -1f);
ctx.TranslateCTM ((float)x, (float)y + li.Font.Ascender);
foreach (var line in frame.GetLines ()) {
ctx.TextPosition = PointF.Empty;
if (ellipsize) // we need to create a new CTLine here because the framesetter already truncated the text for the line
new CTLine (CreateAttributedString (li, li.Text.Substring (line.StringRange.Location)))
.GetTruncatedLine (li.Width.Value, CTLineTruncation.End, ellipsis).Draw (ctx);
else
line.Draw (ctx);
ctx.TranslateCTM (0, lineHeight);
}
ctx.RestoreState ();
}
}
internal static void Draw(CGContext ctx, object layout, double x, double y)
{
LayoutInfo li = (LayoutInfo)layout;
if (li.Framesetter == null)
return;
CGPath path = new CGPath ();
path.AddRect (new RectangleF (0, 0, li.Width ?? float.MaxValue, li.Height ?? float.MaxValue));
CTFrame frame = li.Framesetter.GetFrame (new NSRange (0, li.Text.Length), path, null);
CTLine ellipsis = null;
bool ellipsize = li.Width.HasValue && li.TextTrimming == TextTrimming.WordElipsis;
if (ellipsize)
ellipsis = new CTLine (CreateAttributedString (li, "..."));
float lineHeight = layoutManager.DefaultLineHeightForFont (li.Font);
ctx.SaveState ();
ctx.TextMatrix = CGAffineTransform.MakeScale (1f, -1f);
ctx.TranslateCTM ((float)x, (float)y + li.Font.Ascender);
foreach (var line in frame.GetLines ()) {
ctx.TextPosition = PointF.Empty;
if (ellipsize) // we need to create a new CTLine here because the framesetter already truncated the text for the line
new CTLine (CreateAttributedString (li, li.Text.Substring (line.StringRange.Location)))
.GetTruncatedLine (li.Width.Value, CTLineTruncation.End, ellipsis).Draw (ctx);
else
line.Draw (ctx);
ctx.TranslateCTM (0, lineHeight);
}
ctx.RestoreState ();
}
