/// <summary>
/// Exports the specified plot model to a stream.
/// </summary>
/// <param name="model">The plot model.</param>
/// <param name="stream">The stream to write to.</param>
/// <param name="width">The width of the export image.</param>
/// <param name="height">The height of the exported image.</param>
/// <param name="background">The background.</param>
public static void Export(IPlotModel model, Stream stream, double width, double height, OxyColor background)
{
var canvas = new Canvas { Width = width, Height = height };
if (background.IsVisible())
{
canvas.Background = background.ToBrush();
}
canvas.Measure(new Size(width, height));
canvas.Arrange(new Rect(0, 0, width, height));
var rc = new SilverlightRenderContext(canvas);
model.Update(true);
model.Render(rc, width, height);
canvas.UpdateLayout();
var image = canvas.ToImage();
image.WriteToStream(stream);
}
/// <summary>
/// Gets the cached brush.
/// </summary>
/// <param name="fill">The fill color.</param>
/// <returns>A <see cref="Brush" />.</returns>
private Brush GetCachedBrush(OxyColor fill)
{
Brush brush;
if (this.brushes.TryGetValue(fill, out brush))
{
return brush;
}
return this.brushes[fill] = fill.ToBrush();
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The p.</param>
/// <param name="text">The text.</param>
/// <param name="fill">The fill color.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">Size of the font.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="rotate">The rotation angle.</param>
/// <param name="halign">The horizontal alignment.</param>
/// <param name="valign">The vertical alignment.</param>
/// <param name="maxSize">The maximum size of the text.</param>
public override void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily,
double fontSize,
double fontWeight,
double rotate,
HorizontalAlignment halign,
VerticalAlignment valign,
OxySize? maxSize)
{
if (text == null)
{
return;
}
var fontStyle = fontWeight < 700 ? FontStyle.Regular : FontStyle.Bold;
using (var font = CreateFont(fontFamily, fontSize, fontStyle))
{
this.stringFormat.Alignment = StringAlignment.Near;
this.stringFormat.LineAlignment = StringAlignment.Near;
var size = this.g.MeasureString(text, font, int.MaxValue, this.stringFormat);
if (maxSize != null)
{
if (size.Width > maxSize.Value.Width)
{
size.Width = (float)maxSize.Value.Width;
}
if (size.Height > maxSize.Value.Height)
{
size.Height = (float)maxSize.Value.Height;
}
}
float dx = 0;
if (halign == HorizontalAlignment.Center)
{
dx = -size.Width / 2;
}
if (halign == HorizontalAlignment.Right)
{
dx = -size.Width;
}
float dy = 0;
this.stringFormat.LineAlignment = StringAlignment.Near;
if (valign == VerticalAlignment.Middle)
{
dy = -size.Height / 2;
}
if (valign == VerticalAlignment.Bottom)
{
dy = -size.Height;
}
var graphicsState = this.g.Save();
this.g.TranslateTransform((float)p.X, (float)p.Y);
var layoutRectangle = new RectangleF(0, 0, size.Width, size.Height);
if (Math.Abs(rotate) > double.Epsilon)
{
this.g.RotateTransform((float)rotate);
layoutRectangle.Height += (float)(fontSize / 18.0);
}
this.g.TranslateTransform(dx, dy);
this.g.DrawString(text, font, fill.ToBrush(), layoutRectangle, this.stringFormat);
this.g.Restore(graphicsState);
}
}
/// <summary>
/// Draws the rectangle.
/// </summary>
/// <param name="rect">The rectangle.</param>
/// <param name="fill">The fill color.</param>
/// <param name="stroke">The stroke color.</param>
/// <param name="thickness">The stroke thickness.</param>
public override void DrawRectangle(OxyRect rect, OxyColor fill, OxyColor stroke, double thickness)
{
if (fill.IsVisible())
{
this.g.FillRectangle(
fill.ToBrush(), (float)rect.Left, (float)rect.Top, (float)rect.Width, (float)rect.Height);
}
if (stroke.IsInvisible() || thickness <= 0)
{
return;
}
using (var pen = this.CreatePen(stroke, thickness))
{
this.g.DrawRectangle(pen, (float)rect.Left, (float)rect.Top, (float)rect.Width, (float)rect.Height);
}
}
/// <summary>
/// Draws the polygon from the specified points. The polygon can have stroke and/or fill.
/// </summary>
/// <param name="points">The points.</param>
/// <param name="fill">The fill color.</param>
/// <param name="stroke">The stroke color.</param>
/// <param name="thickness">The stroke thickness.</param>
/// <param name="dashArray">The dash array.</param>
/// <param name="lineJoin">The line join type.</param>
/// <param name="aliased">if set to <c>true</c> the shape will be aliased.</param>
public override void DrawPolygon(
IList<ScreenPoint> points,
OxyColor fill,
OxyColor stroke,
double thickness,
double[] dashArray,
OxyPlot.LineJoin lineJoin,
bool aliased)
{
if (points.Count < 2)
{
return;
}
this.g.SmoothingMode = aliased ? SmoothingMode.None : SmoothingMode.HighQuality;
var pts = this.ToPoints(points);
if (fill.IsVisible())
{
this.g.FillPolygon(fill.ToBrush(), pts);
}
if (stroke.IsInvisible() || thickness <= 0)
{
return;
}
using (var pen = this.CreatePen(stroke, thickness))
{
if (dashArray != null)
{
pen.DashPattern = this.ToFloatArray(dashArray);
}
switch (lineJoin)
{
case OxyPlot.LineJoin.Round:
pen.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
break;
case OxyPlot.LineJoin.Bevel:
pen.LineJoin = System.Drawing.Drawing2D.LineJoin.Bevel;
break;
// The default LineJoin is Miter
}
this.g.DrawPolygon(pen, pts);
}
}
/// <summary>
/// Gets the cached brush.
/// </summary>
/// <param name="fill">The fill color.</param>
/// <returns>A <see cref="Brush" />.</returns>
private Brush GetCachedBrush(OxyColor fill)
{
// TODO: cache
return fill.ToBrush();
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The p.</param>
/// <param name="text">The text.</param>
/// <param name="fill">The fill color.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">Size of the font.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="rotate">The rotation angle.</param>
/// <param name="halign">The horizontal alignment.</param>
/// <param name="valign">The vertical alignment.</param>
/// <param name="maxSize">The maximum size of the text.</param>
public override void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily,
double fontSize,
double fontWeight,
double rotate,
HorizontalAlignment halign,
VerticalAlignment valign,
OxySize? maxSize)
{
var fs = FontStyle.Regular;
if (fontWeight >= 700)
{
fs = FontStyle.Bold;
}
using (var font = new Font(fontFamily, (float)fontSize * FontsizeFactor, fs))
{
using (var sf = new StringFormat { Alignment = StringAlignment.Near })
{
var size = this.g.MeasureString(text, font);
if (maxSize != null)
{
if (size.Width > maxSize.Value.Width)
{
size.Width = (float)maxSize.Value.Width;
}
if (size.Height > maxSize.Value.Height)
{
size.Height = (float)maxSize.Value.Height;
}
}
float dx = 0;
if (halign == HorizontalAlignment.Center)
{
dx = -size.Width / 2;
}
if (halign == HorizontalAlignment.Right)
{
dx = -size.Width;
}
float dy = 0;
sf.LineAlignment = StringAlignment.Near;
if (valign == VerticalAlignment.Middle)
{
dy = -size.Height / 2;
}
if (valign == VerticalAlignment.Bottom)
{
dy = -size.Height;
}
this.g.TranslateTransform((float)p.X, (float)p.Y);
if (Math.Abs(rotate) > double.Epsilon)
{
this.g.RotateTransform((float)rotate);
}
this.g.TranslateTransform(dx, dy);
var layoutRectangle = new RectangleF(0, 0, size.Width + 0.1f, size.Height + 0.1f);
this.g.DrawString(text, font, fill.ToBrush(), layoutRectangle, sf);
this.g.ResetTransform();
}
}
}
