/// <summary>
/// Calculates the bounds with respect to rotation angle and horizontal/vertical alignment.
/// </summary>
/// <param name="bounds">The size of the object to calculate bounds for.</param>
/// <param name="angle">The rotation angle (degrees).</param>
/// <param name="horizontalAlignment">The horizontal alignment.</param>
/// <param name="verticalAlignment">The vertical alignment.</param>
/// <returns>A minimum bounding rectangle.</returns>
public static OxyRect GetBounds(this OxySize bounds, double angle, HorizontalAlignment horizontalAlignment, VerticalAlignment verticalAlignment)
{
var u = horizontalAlignment == HorizontalAlignment.Left ? 0 : horizontalAlignment == HorizontalAlignment.Center ? 0.5 : 1;
var v = verticalAlignment == VerticalAlignment.Top ? 0 : verticalAlignment == VerticalAlignment.Middle ? 0.5 : 1;
var origin = new ScreenVector(u * bounds.Width, v * bounds.Height);
if (angle == 0)
{
return(new OxyRect(-origin.X, -origin.Y, bounds.Width, bounds.Height));
}
// the corners of the rectangle
var p0 = new ScreenVector(0, 0) - origin;
var p1 = new ScreenVector(bounds.Width, 0) - origin;
var p2 = new ScreenVector(bounds.Width, bounds.Height) - origin;
var p3 = new ScreenVector(0, bounds.Height) - origin;
var theta = angle * Math.PI / 180.0;
var costh = Math.Cos(theta);
var sinth = Math.Sin(theta);
Func <ScreenVector, ScreenVector> rotate = p => new ScreenVector((costh * p.X) - (sinth * p.Y), (sinth * p.X) + (costh * p.Y));
var q0 = rotate(p0);
var q1 = rotate(p1);
var q2 = rotate(p2);
var q3 = rotate(p3);
var x = Math.Min(Math.Min(q0.X, q1.X), Math.Min(q2.X, q3.X));
var y = Math.Min(Math.Min(q0.Y, q1.Y), Math.Min(q2.Y, q3.Y));
var w = Math.Max(Math.Max(q0.X - x, q1.X - x), Math.Max(q2.X - x, q3.X - x));
var h = Math.Max(Math.Max(q0.Y - y, q1.Y - y), Math.Max(q2.Y - y, q3.Y - y));
return(new OxyRect(x, y, w, h));
}
/// <summary>
/// Gets the polygon outline of the specified rotated and aligned box.
/// </summary>
/// <param name="size">The size of the box.</param>
/// <param name="origin">The origin of the box.</param>
/// <param name="angle">The rotation angle of the box.</param>
/// <param name="horizontalAlignment">The horizontal alignment of the box.</param>
/// <param name="verticalAlignment">The vertical alignment of the box.</param>
/// <returns>A sequence of points defining the polygon outline of the box.</returns>
public static IEnumerable <ScreenPoint> GetPolygon(this OxySize size, ScreenPoint origin, double angle, HorizontalAlignment horizontalAlignment, VerticalAlignment verticalAlignment)
{
var u = horizontalAlignment == HorizontalAlignment.Left ? 0 : horizontalAlignment == HorizontalAlignment.Center ? 0.5 : 1;
var v = verticalAlignment == VerticalAlignment.Top ? 0 : verticalAlignment == VerticalAlignment.Middle ? 0.5 : 1;
var offset = new ScreenVector(u * size.Width, v * size.Height);
// the corners of the rectangle
var p0 = new ScreenVector(0, 0) - offset;
var p1 = new ScreenVector(size.Width, 0) - offset;
var p2 = new ScreenVector(size.Width, size.Height) - offset;
var p3 = new ScreenVector(0, size.Height) - offset;
if (angle != 0)
{
var theta = angle * Math.PI / 180.0;
var costh = Math.Cos(theta);
var sinth = Math.Sin(theta);
Func <ScreenVector, ScreenVector> rotate = p => new ScreenVector((costh * p.X) - (sinth * p.Y), (sinth * p.X) + (costh * p.Y));
p0 = rotate(p0);
p1 = rotate(p1);
p2 = rotate(p2);
p3 = rotate(p3);
}
yield return(origin + p0);
yield return(origin + p1);
yield return(origin + p2);
yield return(origin + p3);
}
/// <summary>
/// Calculates the maximum size of the specified axes.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <param name="axesOfPositionTier">
/// The axes of position tier.
/// </param>
/// <returns>
/// The maximum size.
/// </returns>
private static double MaxSizeOfPositionTier(IRenderContext rc, IEnumerable <Axis> axesOfPositionTier)
{
double maxSizeOfPositionTier = 0;
foreach (var axis in axesOfPositionTier)
{
OxySize size = axis.Measure(rc);
if (axis.IsHorizontal())
{
if (size.Height > maxSizeOfPositionTier)
{
maxSizeOfPositionTier = size.Height;
}
}
else
{
if (size.Width > maxSizeOfPositionTier)
{
maxSizeOfPositionTier = size.Width;
}
}
}
return(maxSizeOfPositionTier);
}
/// <summary>
/// Draws or measures text containing sub- and superscript.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="pt">The point.</param>
/// <param name="text">The text.</param>
/// <param name="textColor">Color of the text.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">The font size.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="angle">The angle.</param>
/// <param name="ha">The horizontal alignment.</param>
/// <param name="va">The vertical alignment.</param>
/// <param name="maxsize">The maximum size of the text.</param>
/// <param name="measure">Measure the size of the text if set to <c>true</c>.</param>
/// <returns>The size of the text.</returns>
/// <example>Subscript: H_{2}O
/// Superscript: E=mc^{2}
/// Both: A^{2}_{i,j}</example>
public static OxySize DrawMathText(
this IRenderContext rc,
ScreenPoint pt,
string text,
OxyColor textColor,
string fontFamily,
double fontSize,
double fontWeight,
double angle,
HorizontalAlignment ha,
VerticalAlignment va,
OxySize? maxsize,
bool measure)
{
if (string.IsNullOrEmpty(text))
{
return OxySize.Empty;
}
if (text.Contains("^{") || text.Contains("_{"))
{
double x = pt.X;
double y = pt.Y;
// Measure
var size = InternalDrawMathText(rc, x, y, text, textColor, fontFamily, fontSize, fontWeight, true, angle);
switch (ha)
{
case HorizontalAlignment.Right:
x -= size.Width;
break;
case HorizontalAlignment.Center:
x -= size.Width * 0.5;
break;
}
switch (va)
{
case VerticalAlignment.Bottom:
y -= size.Height;
break;
case VerticalAlignment.Middle:
y -= size.Height * 0.5;
break;
}
InternalDrawMathText(rc, x, y, text, textColor, fontFamily, fontSize, fontWeight, false, angle);
return measure ? size : OxySize.Empty;
}
rc.DrawText(pt, text, textColor, fontFamily, fontSize, fontWeight, angle, ha, va, maxsize);
if (measure)
{
return rc.MeasureText(text, fontFamily, fontSize, fontWeight);
}
return OxySize.Empty;
}
/// <summary>
/// Gets the coordinates of the (rotated) background rectangle.
/// </summary>
/// <param name="position">
/// The position.
/// </param>
/// <param name="size">
/// The size.
/// </param>
/// <param name="padding">
/// The padding.
/// </param>
/// <param name="rotation">
/// The rotation.
/// </param>
/// <param name="horizontalAlignment">
/// The horizontal alignment.
/// </param>
/// <param name="verticalAlignment">
/// The vertical alignment.
/// </param>
/// <returns>
/// The background rectangle coordinates.
/// </returns>
private static IList <ScreenPoint> GetTextBounds(
ScreenPoint position,
OxySize size,
OxyThickness padding,
double rotation,
HorizontalTextAlign horizontalAlignment,
VerticalTextAlign verticalAlignment)
{
double left, right, top, bottom;
switch (horizontalAlignment)
{
case HorizontalTextAlign.Center:
left = -size.Width * 0.5;
right = -left;
break;
case HorizontalTextAlign.Right:
left = -size.Width;
right = 0;
break;
default:
left = 0;
right = size.Width;
break;
}
switch (verticalAlignment)
{
case VerticalTextAlign.Middle:
top = -size.Height * 0.5;
bottom = -top;
break;
case VerticalTextAlign.Bottom:
top = -size.Height;
bottom = 0;
break;
default:
top = 0;
bottom = size.Height;
break;
}
double cost = Math.Cos(rotation / 180 * Math.PI);
double sint = Math.Sin(rotation / 180 * Math.PI);
var u = new ScreenVector(cost, sint);
var v = new ScreenVector(-sint, cost);
var polygon = new ScreenPoint[4];
polygon[0] = position + u * (left - padding.Left) + v * (top - padding.Top);
polygon[1] = position + u * (right + padding.Right) + v * (top - padding.Top);
polygon[2] = position + u * (right + padding.Right) + v * (bottom + padding.Bottom);
polygon[3] = position + u * (left - padding.Left) + v * (bottom + padding.Bottom);
return(polygon);
}
/// <summary>
/// Measures the size of the title and subtitle.
/// </summary>
/// <param name="rc">
/// The rendering context.
/// </param>
/// <returns>
/// Size of the titles.
/// </returns>
private OxySize MeasureTitles(IRenderContext rc)
{
OxySize size1 = rc.MeasureText(this.Title, this.ActualTitleFont, this.TitleFontSize, this.TitleFontWeight);
OxySize size2 = rc.MeasureText(
this.Subtitle, this.SubtitleFont ?? this.ActualSubtitleFont, this.SubtitleFontSize, this.SubtitleFontWeight);
double height = size1.Height + size2.Height;
double width = Math.Max(size1.Width, size2.Width);
return(new OxySize(width, height));
}
public OxySize MeasureText(string text, string fontFamily = "",
double fontSize = 10, double fontWeight = 500)
{
FontDescription desc = new FontDescription();
OxySize size = new OxySize();
int width, height;
desc.Family = fontFamily;
desc.Size = Pango.Units.FromPixels ((int) fontSize);
desc.Weight = PangoWeightFromDouble (fontWeight);
layout.FontDescription = desc;
layout.SetMarkup (GLib.Markup.EscapeText (text));
layout.GetPixelSize (out width, out height);
size.Width = (double) width;
size.Height = (double) height;
return size;
}
/// <summary>
/// Renders the title and subtitle.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
private void RenderTitle(IRenderContext rc)
{
OxySize size1 = rc.MeasureText(this.Title, this.ActualTitleFont, this.TitleFontSize, this.TitleFontWeight);
rc.MeasureText(
this.Subtitle, this.SubtitleFont ?? this.ActualSubtitleFont, this.SubtitleFontSize, this.SubtitleFontWeight);
// double height = size1.Height + size2.Height;
// double dy = (TitleArea.Top+TitleArea.Bottom-height)*0.5;
double dy = this.TitleArea.Top;
double dx = (this.TitleArea.Left + this.TitleArea.Right) * 0.5;
if (!string.IsNullOrEmpty(this.Title))
{
rc.DrawMathText(
new ScreenPoint(dx, dy),
this.Title,
this.TitleColor ?? this.TextColor,
this.ActualTitleFont,
this.TitleFontSize,
this.TitleFontWeight,
0,
HorizontalAlignment.Center,
VerticalAlignment.Top);
dy += size1.Height;
}
if (!string.IsNullOrEmpty(this.Subtitle))
{
rc.DrawMathText(
new ScreenPoint(dx, dy),
this.Subtitle,
this.SubtitleColor ?? this.TextColor,
this.ActualSubtitleFont,
this.SubtitleFontSize,
this.SubtitleFontWeight,
0,
HorizontalAlignment.Center,
VerticalAlignment.Top);
}
}
/// <summary>
/// The measure string.
/// </summary>
/// <param name="faceName">
/// The font face name.
/// </param>
/// <param name="height">
/// The height.
/// </param>
/// <param name="weight">
/// The weight.
/// </param>
/// <param name="str">
/// The string.
/// </param>
/// <returns>
/// The size of the rendered string.
/// </returns>
public static OxySize MeasureString(string faceName, int height, int weight, string str)
{
var lines = Regex.Split(str, "\r\n");
OxySize result = new OxySize(0, 0);
foreach (var line in lines)
{
var hfont = CreateFont(height, 0, 0, 0, weight, 0, 0, 0, 0, 0, 0, 0, 0, faceName);
var hdc = GetDC(IntPtr.Zero);
var oldobj = SelectObject(hdc, hfont);
var temp = GetTextExtent(hdc, line);
SelectObject(hdc, oldobj);
DeleteObject(hfont);
DeleteDC(hdc);
var lineSpacing = temp.Height / 3.0;
result.Height += temp.Height + lineSpacing;
result.Width = Math.Max(temp.Width * 1.28, result.Width);
}
return(result);
}
public void RenderTitle(string title, string subtitle)
{
OxySize size1 = rc.MeasureText(title, plot.TitleFont, plot.TitleFontSize, plot.TitleFontWeight);
OxySize size2 = rc.MeasureText(subtitle, plot.TitleFont, plot.TitleFontSize, plot.TitleFontWeight);
double height = size1.Height + size2.Height;
double dy = (plot.AxisMargins.Top - height) * 0.5;
double dx = (plot.Bounds.Left + plot.Bounds.Right) * 0.5;
if (!String.IsNullOrEmpty(title))
{
rc.DrawText(
new ScreenPoint(dx, dy), title, plot.TextColor,
plot.TitleFont, plot.TitleFontSize, plot.TitleFontWeight,
0,
HorizontalTextAlign.Center, VerticalTextAlign.Top);
}
if (!String.IsNullOrEmpty(subtitle))
{
rc.DrawText(new ScreenPoint(dx, dy + size1.Height), subtitle, plot.TextColor,
plot.TitleFont, plot.SubtitleFontSize, plot.SubtitleFontWeight, 0,
HorizontalTextAlign.Center, VerticalTextAlign.Top);
}
}
/// <summary>
/// Renders the axis title.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
/// <param name="titlePosition">
/// The title position.
/// </param>
private void RenderAxisTitle(Axis axis, double titlePosition)
{
bool isHorizontal = axis.IsHorizontal();
OxySize?maxSize = null;
if (axis.ClipTitle)
{
// Calculate the title clipping dimensions
double screenLength = isHorizontal
? Math.Abs(axis.ScreenMax.X - axis.ScreenMin.X)
: Math.Abs(axis.ScreenMax.Y - axis.ScreenMin.Y);
maxSize = new OxySize(screenLength * axis.TitleClippingLength, double.MaxValue);
}
double angle = -90;
var halign = HorizontalAlignment.Center;
var valign = VerticalAlignment.Top;
var lpt = this.GetAxisTitlePositionAndAlignment(axis, titlePosition, ref angle, ref halign, ref valign);
this.rc.SetToolTip(axis.ToolTip);
this.rc.DrawMathText(
lpt,
axis.ActualTitle,
axis.ActualTitleColor,
axis.ActualTitleFont,
axis.ActualTitleFontSize,
axis.ActualTitleFontWeight,
angle,
halign,
valign,
maxSize);
this.rc.SetToolTip(null);
}
/// <summary>
/// Draws text.
/// </summary>
/// <param name="p">The position.</param>
/// <param name="text">The text.</param>
/// <param name="fill">The text color.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">Size of the font (in device independent units, 1/96 inch).</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 (in device independent units, 1/96 inch).</param>
public void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily = null,
double fontSize = 10,
double fontWeight = 500,
double rotate = 0,
HorizontalAlignment halign = HorizontalAlignment.Left,
VerticalAlignment valign = VerticalAlignment.Top,
OxySize? maxSize = null)
{
}
/// <summary>
/// Gets the rectangle of the legend box.
/// </summary>
/// <param name="legendSize">Size of the legend box.</param>
/// <returns>A rectangle.</returns>
private OxyRect GetLegendRectangle(OxySize legendSize)
{
double top = 0;
double left = 0;
if (this.LegendPlacement == LegendPlacement.Outside)
{
switch (this.LegendPosition)
{
case LegendPosition.LeftTop:
case LegendPosition.LeftMiddle:
case LegendPosition.LeftBottom:
left = this.PlotAndAxisArea.Left - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.RightTop:
case LegendPosition.RightMiddle:
case LegendPosition.RightBottom:
left = this.PlotAndAxisArea.Right + this.LegendMargin;
break;
case LegendPosition.TopLeft:
case LegendPosition.TopCenter:
case LegendPosition.TopRight:
top = this.PlotAndAxisArea.Top - legendSize.Height - this.LegendMargin;
break;
case LegendPosition.BottomLeft:
case LegendPosition.BottomCenter:
case LegendPosition.BottomRight:
top = this.PlotAndAxisArea.Bottom + this.LegendMargin;
break;
}
switch (this.LegendPosition)
{
case LegendPosition.TopLeft:
case LegendPosition.BottomLeft:
left = this.PlotArea.Left;
break;
case LegendPosition.TopRight:
case LegendPosition.BottomRight:
left = this.PlotArea.Right - legendSize.Width;
break;
case LegendPosition.LeftTop:
case LegendPosition.RightTop:
top = this.PlotArea.Top;
break;
case LegendPosition.LeftBottom:
case LegendPosition.RightBottom:
top = this.PlotArea.Bottom - legendSize.Height;
break;
case LegendPosition.LeftMiddle:
case LegendPosition.RightMiddle:
top = (this.PlotArea.Top + this.PlotArea.Bottom - legendSize.Height) * 0.5;
break;
case LegendPosition.TopCenter:
case LegendPosition.BottomCenter:
left = (this.PlotArea.Left + this.PlotArea.Right - legendSize.Width) * 0.5;
break;
}
}
else
{
switch (this.LegendPosition)
{
case LegendPosition.LeftTop:
case LegendPosition.LeftMiddle:
case LegendPosition.LeftBottom:
left = this.PlotArea.Left + this.LegendMargin;
break;
case LegendPosition.RightTop:
case LegendPosition.RightMiddle:
case LegendPosition.RightBottom:
left = this.PlotArea.Right - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.TopLeft:
case LegendPosition.TopCenter:
case LegendPosition.TopRight:
top = this.PlotArea.Top + this.LegendMargin;
break;
case LegendPosition.BottomLeft:
case LegendPosition.BottomCenter:
case LegendPosition.BottomRight:
top = this.PlotArea.Bottom - legendSize.Height - this.LegendMargin;
break;
}
switch (this.LegendPosition)
{
case LegendPosition.TopLeft:
case LegendPosition.BottomLeft:
left = this.PlotArea.Left + this.LegendMargin;
break;
case LegendPosition.TopRight:
case LegendPosition.BottomRight:
left = this.PlotArea.Right - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.LeftTop:
case LegendPosition.RightTop:
top = this.PlotArea.Top + this.LegendMargin;
break;
case LegendPosition.LeftBottom:
case LegendPosition.RightBottom:
top = this.PlotArea.Bottom - legendSize.Height - this.LegendMargin;
break;
case LegendPosition.LeftMiddle:
case LegendPosition.RightMiddle:
top = (this.PlotArea.Top + this.PlotArea.Bottom - legendSize.Height) * 0.5;
break;
case LegendPosition.TopCenter:
case LegendPosition.BottomCenter:
left = (this.PlotArea.Left + this.PlotArea.Right - legendSize.Width) * 0.5;
break;
}
}
return new OxyRect(left, top, legendSize.Width, legendSize.Height);
}
/// <summary>
/// Renders the legend for the specified series.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="s">The series.</param>
/// <param name="rect">The position and size of the legend.</param>
private void RenderLegend(IRenderContext rc, Series.Series s, OxyRect rect)
{
var actualItemAlignment = this.LegendItemAlignment;
if (this.LegendOrientation == LegendOrientation.Horizontal)
{
// center/right alignment is not supported for horizontal orientation
actualItemAlignment = HorizontalAlignment.Left;
}
double x = rect.Left;
switch (actualItemAlignment)
{
case HorizontalAlignment.Center:
x = (rect.Left + rect.Right) / 2;
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
else
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
break;
case HorizontalAlignment.Right:
x = rect.Right;
// if (LegendSymbolPlacement == LegendSymbolPlacement.Right)
x -= this.LegendSymbolLength + this.LegendSymbolMargin;
break;
}
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x += this.LegendSymbolLength + this.LegendSymbolMargin;
}
double y = rect.Top;
var maxsize = new OxySize(Math.Max(rect.Width - this.LegendSymbolLength - this.LegendSymbolMargin, 0), rect.Height);
rc.SetToolTip(s.ToolTip);
var textSize = rc.DrawMathText(
new ScreenPoint(x, y),
s.Title,
this.LegendTextColor.GetActualColor(this.TextColor),
this.LegendFont ?? this.DefaultFont,
this.LegendFontSize,
this.LegendFontWeight,
0,
actualItemAlignment,
VerticalAlignment.Top,
maxsize,
true);
double x0 = x;
switch (actualItemAlignment)
{
case HorizontalAlignment.Center:
x0 = x - (textSize.Width * 0.5);
break;
case HorizontalAlignment.Right:
x0 = x - textSize.Width;
break;
}
var symbolRect =
new OxyRect(
this.LegendSymbolPlacement == LegendSymbolPlacement.Right
? x0 + textSize.Width + this.LegendSymbolMargin
: x0 - this.LegendSymbolMargin - this.LegendSymbolLength,
rect.Top,
this.LegendSymbolLength,
textSize.Height);
s.RenderLegend(rc, symbolRect);
rc.SetToolTip(null);
}
/// <summary>
/// Calculates the bounds with respect to rotation angle and horizontal/vertical alignment.
/// </summary>
/// <param name="bounds">The size of the object to calculate bounds for.</param>
/// <param name="angle">The rotation angle (degrees).</param>
/// <returns>A minimum bounding rectangle.</returns>
private static OxySize MeasureRotatedRectangleBound(OxySize bounds, double angle)
{
var oxyRect = bounds.GetBounds(angle, HorizontalAlignment.Center, VerticalAlignment.Middle);
return(new OxySize(oxyRect.Width, oxyRect.Height));
}
/// <summary>
/// Renders the axis title.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
/// <param name="titlePosition">
/// The title position.
/// </param>
private void RenderAxisTitle(Axis axis, double titlePosition)
{
bool isHorizontal = axis.IsHorizontal();
OxySize? maxSize = null;
if (axis.ClipTitle)
{
// Calculate the title clipping dimensions
double screenLength = isHorizontal
? Math.Abs(axis.ScreenMax.X - axis.ScreenMin.X)
: Math.Abs(axis.ScreenMax.Y - axis.ScreenMin.Y);
maxSize = new OxySize(screenLength * axis.TitleClippingLength, double.MaxValue);
}
double angle = -90;
var halign = HorizontalTextAlign.Center;
var valign = VerticalTextAlign.Top;
var lpt = this.GetAxisTitlePositionAndAlignment(axis, titlePosition, ref angle, ref halign, ref valign);
this.rc.SetToolTip(axis.ToolTip);
this.rc.DrawText(
lpt,
axis.ActualTitle,
axis.ActualTitleColor,
axis.ActualTitleFont,
axis.ActualTitleFontSize,
axis.ActualTitleFontWeight,
angle,
halign,
valign,
maxSize);
this.rc.SetToolTip(null);
}
/// <summary>
/// Draws the clipped text.
/// </summary>
/// <param name="rc">The rendering context.</param>
/// <param name="clippingRectangle">The clipping rectangle.</param>
/// <param name="p">The position.</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="horizontalAlignment">The horizontal align.</param>
/// <param name="verticalAlignment">The vertical align.</param>
/// <param name="maxSize">Size of the max.</param>
public static void DrawClippedText(
this IRenderContext rc,
OxyRect clippingRectangle,
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily = null,
double fontSize = 10,
double fontWeight = 500,
double rotate = 0,
HorizontalTextAlign horizontalAlignment = HorizontalTextAlign.Left,
VerticalTextAlign verticalAlignment = VerticalTextAlign.Top,
OxySize? maxSize = null)
{
if (clippingRectangle.Contains(p.X, p.Y))
{
rc.DrawText(p, text, fill, fontFamily, fontSize, fontWeight, rotate, horizontalAlignment, verticalAlignment, maxSize);
}
}
/// <summary>
/// Renders the legend for the specified series.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <param name="s">
/// The series.
/// </param>
/// <param name="rect">
/// The position and size of the legend.
/// </param>
private void RenderLegend(IRenderContext rc, Series.Series s, OxyRect rect)
{
double x = rect.Left;
switch (this.LegendItemAlignment)
{
case HorizontalAlignment.Center:
x = (rect.Left + rect.Right) / 2;
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
else
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
break;
case HorizontalAlignment.Right:
x = rect.Right;
// if (LegendSymbolPlacement == LegendSymbolPlacement.Right)
x -= this.LegendSymbolLength + this.LegendSymbolMargin;
break;
}
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x += this.LegendSymbolLength + this.LegendSymbolMargin;
}
double y = rect.Top;
var maxsize = new OxySize(Math.Max(rect.Right - x, 0), Math.Max(rect.Bottom - y, 0));
var textSize = rc.DrawMathText(
new ScreenPoint(x, y),
s.Title,
this.LegendTextColor ?? this.TextColor,
this.LegendFont ?? this.DefaultFont,
this.LegendFontSize,
this.LegendFontWeight,
0,
this.LegendItemAlignment,
VerticalAlignment.Top,
maxsize,
true);
double x0 = x;
switch (this.LegendItemAlignment)
{
case HorizontalAlignment.Center:
x0 = x - (textSize.Width * 0.5);
break;
case HorizontalAlignment.Right:
x0 = x - textSize.Width;
break;
}
var symbolRect =
new OxyRect(
this.LegendSymbolPlacement == LegendSymbolPlacement.Right
? x0 + textSize.Width + this.LegendSymbolMargin
: x0 - this.LegendSymbolMargin - this.LegendSymbolLength,
rect.Top,
this.LegendSymbolLength,
textSize.Height);
s.RenderLegend(rc, symbolRect);
}
/// <summary>
/// Draws the clipped text.
/// </summary>
/// <param name="rc">The rendering context.</param>
/// <param name="clippingRectangle">The clipping rectangle.</param>
/// <param name="p">The position.</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="horizontalAlignment">The horizontal align.</param>
/// <param name="verticalAlignment">The vertical align.</param>
/// <param name="maxSize">Size of the max.</param>
public static void DrawClippedText(
this IRenderContext rc,
OxyRect clippingRectangle,
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily = null,
double fontSize = 10,
double fontWeight = 500,
double rotate = 0,
HorizontalAlignment horizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment verticalAlignment = VerticalAlignment.Top,
OxySize? maxSize = null)
{
if (rc.SetClip(clippingRectangle))
{
rc.DrawText(p, text, fill, fontFamily, fontSize, fontWeight, rotate, horizontalAlignment, verticalAlignment, maxSize);
rc.ResetClip();
return;
}
// fall back simply check position
if (clippingRectangle.Contains(p.X, p.Y))
{
rc.DrawText(p, text, fill, fontFamily, fontSize, fontWeight, rotate, horizontalAlignment, verticalAlignment, maxSize);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OxyRect"/> struct by location and size.
/// </summary>
/// <param name="p0">The location.</param>
/// <param name="size">The size.</param>
public OxyRect(ScreenPoint p0, OxySize size)
: this(p0.X, p0.Y, size.Width, size.Height)
{
}
/// <summary>
/// Calculates the bounds with respect to rotation angle and horizontal/vertical alignment.
/// </summary>
/// <param name="bounds">The size of the object to calculate bounds for.</param>
/// <param name="angle">The rotation angle (degrees).</param>
/// <returns>A minimum bounding rectangle.</returns>
private static OxySize MeasureRotatedRectangleBound(OxySize bounds, double angle)
{
var oxyRect = bounds.GetBounds(angle, HorizontalAlignment.Center, VerticalAlignment.Middle);
return new OxySize(oxyRect.Width, oxyRect.Height);
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The position of the text.</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)
{
this.rc.DrawText(p, text, fill, this.GetFontFamily(fontFamily), fontSize, fontWeight, rotate, halign, valign, maxSize);
}
/// <summary>
/// Renders the legend for the specified series.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <param name="s">
/// The series.
/// </param>
/// <param name="rect">
/// The position and size of the legend.
/// </param>
private void RenderLegend(IRenderContext rc, Series s, OxyRect rect)
{
double x = rect.Left;
switch (this.LegendItemAlignment)
{
case HorizontalTextAlign.Center:
x = (rect.Left + rect.Right) / 2;
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
else
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
break;
case HorizontalTextAlign.Right:
x = rect.Right;
// if (LegendSymbolPlacement == LegendSymbolPlacement.Right)
x -= this.LegendSymbolLength + this.LegendSymbolMargin;
break;
}
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x += this.LegendSymbolLength + this.LegendSymbolMargin;
}
double y = rect.Top;
var maxsize = new OxySize(Math.Max(rect.Right - x, 0), Math.Max(rect.Bottom - y, 0));
var textSize = rc.DrawMathText(
new ScreenPoint(x, y),
s.Title,
this.LegendTextColor ?? this.TextColor,
this.LegendFont ?? this.DefaultFont,
this.LegendFontSize,
this.LegendFontWeight,
0,
this.LegendItemAlignment,
VerticalTextAlign.Top,
maxsize,
true);
double x0 = x;
switch (this.LegendItemAlignment)
{
case HorizontalTextAlign.Center:
x0 = x - (textSize.Width * 0.5);
break;
case HorizontalTextAlign.Right:
x0 = x - textSize.Width;
break;
}
var symbolRect =
new OxyRect(
this.LegendSymbolPlacement == LegendSymbolPlacement.Right
? x0 + textSize.Width + this.LegendSymbolMargin
: x0 - this.LegendSymbolMargin - this.LegendSymbolLength,
rect.Top,
this.LegendSymbolLength,
textSize.Height);
s.RenderLegend(rc, symbolRect);
}
/// <summary>
/// The draw text.
/// </summary>
/// <param name="p">
/// The p.
/// </param>
/// <param name="text">
/// The text.
/// </param>
/// <param name="fill">
/// The fill.
/// </param>
/// <param name="fontFamily">
/// The font family.
/// </param>
/// <param name="fontSize">
/// The font size.
/// </param>
/// <param name="fontWeight">
/// The font weight.
/// </param>
/// <param name="rotate">
/// The rotate.
/// </param>
/// <param name="halign">
/// The halign.
/// </param>
/// <param name="valign">
/// The valign.
/// </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,
HorizontalTextAlign halign,
VerticalTextAlign valign,
OxySize? maxSize)
{
FontStyle fs = FontStyle.Regular;
if (fontWeight >= 700)
{
fs = FontStyle.Bold;
}
var font = new Font(fontFamily, (float)fontSize * FontsizeFactor, fs);
var sf = new StringFormat { Alignment = StringAlignment.Near };
SizeF 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 == HorizontalTextAlign.Center)
{
dx = -size.Width / 2;
// sf.Alignment = StringAlignment.Center;
}
if (halign == HorizontalTextAlign.Right)
{
dx = -size.Width;
// sf.Alignment = StringAlignment.Far;
}
float dy = 0;
sf.LineAlignment = StringAlignment.Near;
if (valign == VerticalTextAlign.Middle)
{
// sf.LineAlignment = StringAlignment.Center;
dy = -size.Height / 2;
}
if (valign == VerticalTextAlign.Bottom)
{
// sf.LineAlignment = StringAlignment.Far;
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, size.Height);
this.g.DrawString(text, font, this.ToBrush(fill), layoutRectangle, sf);
this.g.ResetTransform();
}
/// <summary>
/// Measures the legends.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="availableSize">The available size for the legend box.</param>
/// <returns>The size of the legend box.</returns>
private OxySize MeasureLegends(IRenderContext rc, OxySize availableSize)
{
return(this.RenderOrMeasureLegends(rc, new OxyRect(0, 0, availableSize.Width, availableSize.Height), true));
}
/// <summary>
/// Gets the rectangle of the legend box.
/// </summary>
/// <param name="legendSize">Size of the legend box.</param>
/// <returns>A rectangle.</returns>
private OxyRect GetLegendRectangle(OxySize legendSize)
{
double top = 0;
double left = 0;
if (this.LegendPlacement == LegendPlacement.Outside)
{
switch (this.LegendPosition)
{
case LegendPosition.LeftTop:
case LegendPosition.LeftMiddle:
case LegendPosition.LeftBottom:
left = this.PlotAndAxisArea.Left - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.RightTop:
case LegendPosition.RightMiddle:
case LegendPosition.RightBottom:
left = this.PlotAndAxisArea.Right + this.LegendMargin;
break;
case LegendPosition.TopLeft:
case LegendPosition.TopCenter:
case LegendPosition.TopRight:
top = this.PlotAndAxisArea.Top - legendSize.Height - this.LegendMargin;
break;
case LegendPosition.BottomLeft:
case LegendPosition.BottomCenter:
case LegendPosition.BottomRight:
top = this.PlotAndAxisArea.Bottom + this.LegendMargin;
break;
}
switch (this.LegendPosition)
{
case LegendPosition.TopLeft:
case LegendPosition.BottomLeft:
left = this.PlotArea.Left;
break;
case LegendPosition.TopRight:
case LegendPosition.BottomRight:
left = this.PlotArea.Right - legendSize.Width;
break;
case LegendPosition.LeftTop:
case LegendPosition.RightTop:
top = this.PlotArea.Top;
break;
case LegendPosition.LeftBottom:
case LegendPosition.RightBottom:
top = this.PlotArea.Bottom - legendSize.Height;
break;
case LegendPosition.LeftMiddle:
case LegendPosition.RightMiddle:
top = (this.PlotArea.Top + this.PlotArea.Bottom - legendSize.Height) * 0.5;
break;
case LegendPosition.TopCenter:
case LegendPosition.BottomCenter:
left = (this.PlotArea.Left + this.PlotArea.Right - legendSize.Width) * 0.5;
break;
}
}
else
{
switch (this.LegendPosition)
{
case LegendPosition.LeftTop:
case LegendPosition.LeftMiddle:
case LegendPosition.LeftBottom:
left = this.PlotArea.Left + this.LegendMargin;
break;
case LegendPosition.RightTop:
case LegendPosition.RightMiddle:
case LegendPosition.RightBottom:
left = this.PlotArea.Right - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.TopLeft:
case LegendPosition.TopCenter:
case LegendPosition.TopRight:
top = this.PlotArea.Top + this.LegendMargin;
break;
case LegendPosition.BottomLeft:
case LegendPosition.BottomCenter:
case LegendPosition.BottomRight:
top = this.PlotArea.Bottom - legendSize.Height - this.LegendMargin;
break;
}
switch (this.LegendPosition)
{
case LegendPosition.TopLeft:
case LegendPosition.BottomLeft:
left = this.PlotArea.Left + this.LegendMargin;
break;
case LegendPosition.TopRight:
case LegendPosition.BottomRight:
left = this.PlotArea.Right - legendSize.Width - this.LegendMargin;
break;
case LegendPosition.LeftTop:
case LegendPosition.RightTop:
top = this.PlotArea.Top + this.LegendMargin;
break;
case LegendPosition.LeftBottom:
case LegendPosition.RightBottom:
top = this.PlotArea.Bottom - legendSize.Height - this.LegendMargin;
break;
case LegendPosition.LeftMiddle:
case LegendPosition.RightMiddle:
top = (this.PlotArea.Top + this.PlotArea.Bottom - legendSize.Height) * 0.5;
break;
case LegendPosition.TopCenter:
case LegendPosition.BottomCenter:
left = (this.PlotArea.Left + this.PlotArea.Right - legendSize.Width) * 0.5;
break;
}
}
return(new OxyRect(left, top, legendSize.Width, legendSize.Height));
}
/// <summary>
/// The internal draw math text.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <param name="x">
/// The x.
/// </param>
/// <param name="y">
/// The y.
/// </param>
/// <param name="s">
/// The s.
/// </param>
/// <param name="textColor">
/// The text color.
/// </param>
/// <param name="fontFamily">
/// The font family.
/// </param>
/// <param name="fontSize">
/// The font size.
/// </param>
/// <param name="fontWeight">
/// The font weight.
/// </param>
/// <param name="measureOnly">
/// The measure only.
/// </param>
/// <returns>
/// The size of the text.
/// </returns>
private static OxySize InternalDrawMathText(
IRenderContext rc,
double x,
double y,
string s,
OxyColor textColor,
string fontFamily,
double fontSize,
double fontWeight,
bool measureOnly)
{
int i = 0;
double currentX = x;
double maximumX = x;
double maxHeight = 0;
// http://en.wikipedia.org/wiki/Subscript_and_superscript
double superscriptY = y + fontSize * SuperAlignment;
double superscriptFontSize = fontSize * SuperSize;
double subscriptY = y + fontSize * SubAlignment;
double subscriptFontSize = fontSize * SubSize;
Func <double, double, string, double, OxySize> drawText = (xb, yb, text, fSize) =>
{
if (!measureOnly)
{
rc.DrawText(new ScreenPoint(xb, yb), text, textColor, fontFamily, fSize, fontWeight);
}
return(rc.MeasureText(text, fontFamily, fSize, fontWeight));
};
while (i < s.Length)
{
// Superscript
if (i + 1 < s.Length && s[i] == '^' && s[i + 1] == '{')
{
int i1 = s.IndexOf('}', i);
if (i1 != -1)
{
string supString = s.Substring(i + 2, i1 - i - 2);
i = i1 + 1;
OxySize size = drawText(currentX, superscriptY, supString, superscriptFontSize);
if (currentX + size.Width > maximumX)
{
maximumX = currentX + size.Width;
}
continue;
}
}
// Subscript
if (i + 1 < s.Length && s[i] == '_' && s[i + 1] == '{')
{
int i1 = s.IndexOf('}', i);
if (i1 != -1)
{
string subString = s.Substring(i + 2, i1 - i - 2);
i = i1 + 1;
OxySize size = drawText(currentX, subscriptY, subString, subscriptFontSize);
if (currentX + size.Width > maximumX)
{
maximumX = currentX + size.Width;
}
continue;
}
}
// Regular text
int i2 = s.IndexOfAny("^_".ToCharArray(), i);
string regularString;
if (i2 == -1)
{
regularString = s.Substring(i);
i = s.Length;
}
else
{
regularString = s.Substring(i, i2 - i);
i = i2;
}
currentX = maximumX + 2;
OxySize size2 = drawText(currentX, y, regularString, fontSize);
currentX += size2.Width + 2;
maxHeight = Math.Max(maxHeight, size2.Height);
maximumX = currentX;
}
return(new OxySize(maximumX - x, maxHeight));
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The position of the text.</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)
{
this.doc.SaveState();
this.doc.SetFont(fontFamily, fontSize / 96 * 72, fontWeight > 500);
this.doc.SetFillColor(fill);
double width, height;
this.doc.MeasureText(text, out width, out height);
if (maxSize != null)
{
if (width > maxSize.Value.Width)
{
width = Math.Max(maxSize.Value.Width, 0);
}
if (height > maxSize.Value.Height)
{
height = Math.Max(maxSize.Value.Height, 0);
}
}
double dx = 0;
if (halign == HorizontalAlignment.Center)
{
dx = -width / 2;
}
if (halign == HorizontalAlignment.Right)
{
dx = -width;
}
double dy = 0;
if (valign == VerticalAlignment.Middle)
{
dy = -height / 2;
}
if (valign == VerticalAlignment.Top)
{
dy = -height;
}
double y = this.doc.PageHeight - p.Y;
this.doc.Translate(p.X, y);
if (Math.Abs(rotate) > 1e-6)
{
this.doc.Rotate(-rotate);
}
this.doc.Translate(dx, dy);
// this.doc.DrawRectangle(0, 0, width, height);
this.doc.SetClippingRectangle(0, 0, width, height);
this.doc.DrawText(0, 0, text);
this.doc.RestoreState();
}
/// <summary>
/// Draws text containing sub- and superscript.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="pt">The point.</param>
/// <param name="text">The text.</param>
/// <param name="textColor">Color of the text.</param>
/// <param name="fontFamily">The font family.</param>
/// <param name="fontSize">The font size.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="angle">The angle.</param>
/// <param name="ha">The horizontal alignment.</param>
/// <param name="va">The vertical alignment.</param>
/// <param name="maxSize">The maximum size of the text.</param>
/// <example>Subscript: H_{2}O
/// Superscript: E=mc^{2}
/// Both: A^{2}_{i,j}</example>
public static void DrawMathText(
this IRenderContext rc,
ScreenPoint pt,
string text,
OxyColor textColor,
string fontFamily,
double fontSize,
double fontWeight,
double angle,
HorizontalAlignment ha,
VerticalAlignment va,
OxySize? maxSize = null)
{
DrawMathText(rc, pt, text, textColor, fontFamily, fontSize, fontWeight, angle, ha, va, maxSize, false);
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The position of the text.</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 abstract void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily,
double fontSize,
double fontWeight,
double rotate,
HorizontalAlignment halign,
VerticalAlignment valign,
OxySize? maxSize);
/// <summary>
/// Renders the legend for the specified series.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="s">The series.</param>
/// <param name="rect">The position and size of the legend.</param>
private void RenderLegend(IRenderContext rc, Series.Series s, OxyRect rect)
{
var actualItemAlignment = this.LegendItemAlignment;
if (this.LegendOrientation == LegendOrientation.Horizontal)
{
// center/right alignment is not supported for horizontal orientation
actualItemAlignment = HorizontalAlignment.Left;
}
double x = rect.Left;
switch (actualItemAlignment)
{
case HorizontalAlignment.Center:
x = (rect.Left + rect.Right) / 2;
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
else
{
x -= (this.LegendSymbolLength + this.LegendSymbolMargin) / 2;
}
break;
case HorizontalAlignment.Right:
x = rect.Right;
// if (LegendSymbolPlacement == LegendSymbolPlacement.Right)
x -= this.LegendSymbolLength + this.LegendSymbolMargin;
break;
}
if (this.LegendSymbolPlacement == LegendSymbolPlacement.Left)
{
x += this.LegendSymbolLength + this.LegendSymbolMargin;
}
double y = rect.Top;
var maxsize = new OxySize(Math.Max(rect.Width - this.LegendSymbolLength - this.LegendSymbolMargin, 0), rect.Height);
rc.SetToolTip(s.ToolTip);
var textSize = rc.DrawMathText(
new ScreenPoint(x, y),
s.Title,
this.LegendTextColor.GetActualColor(this.TextColor),
this.LegendFont ?? this.DefaultFont,
this.LegendFontSize,
this.LegendFontWeight,
0,
actualItemAlignment,
VerticalAlignment.Top,
maxsize,
true);
double x0 = x;
switch (actualItemAlignment)
{
case HorizontalAlignment.Center:
x0 = x - (textSize.Width * 0.5);
break;
case HorizontalAlignment.Right:
x0 = x - textSize.Width;
break;
}
var symbolRect =
new OxyRect(
this.LegendSymbolPlacement == LegendSymbolPlacement.Right
? x0 + textSize.Width + this.LegendSymbolMargin
: x0 - this.LegendSymbolMargin - this.LegendSymbolLength,
rect.Top,
this.LegendSymbolLength,
textSize.Height);
s.RenderLegend(rc, symbolRect);
rc.SetToolTip(null);
}
/// <summary>
/// Measures the size of the axis (maximum axis label width/height).
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <returns>
/// The size of the axis.
/// </returns>
public virtual OxySize Measure(IRenderContext rc)
{
IList<double> majorTickValues;
IList<double> minorTickValues;
IList<double> majorLabelValues;
this.GetTickValues(out majorLabelValues, out majorTickValues, out minorTickValues);
var maximumTextSize = new OxySize();
foreach (double v in majorLabelValues)
{
string s = this.FormatValue(v);
var size = rc.MeasureText(s, this.ActualFont, this.ActualFontSize, this.ActualFontWeight);
if (size.Width > maximumTextSize.Width)
{
maximumTextSize.Width = size.Width;
}
if (size.Height > maximumTextSize.Height)
{
maximumTextSize.Height = size.Height;
}
}
var labelTextSize = rc.MeasureText(
this.ActualTitle, this.ActualFont, this.ActualFontSize, this.ActualFontWeight);
double width = 0;
double height = 0;
if (this.IsHorizontal())
{
switch (this.TickStyle)
{
case TickStyle.Outside:
height += this.MajorTickSize;
break;
case TickStyle.Crossing:
height += this.MajorTickSize * 0.75;
break;
}
height += this.AxisTickToLabelDistance;
height += maximumTextSize.Height;
if (labelTextSize.Height > 0)
{
height += this.AxisTitleDistance;
height += labelTextSize.Height;
}
}
else
{
switch (this.TickStyle)
{
case TickStyle.Outside:
width += this.MajorTickSize;
break;
case TickStyle.Crossing:
width += this.MajorTickSize * 0.75;
break;
}
width += this.AxisTickToLabelDistance;
width += maximumTextSize.Width;
if (labelTextSize.Height > 0)
{
width += this.AxisTitleDistance;
width += labelTextSize.Height;
}
}
return new OxySize(width, height);
}
/// <summary>
/// Renders or measures the legends.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="rect">Provides the available size if measuring, otherwise it provides the position and size of the legend.</param>
/// <param name="measureOnly">Specify if the size of the legend box should be measured only (not rendered).</param>
/// <returns>The size of the legend box.</returns>
private OxySize RenderOrMeasureLegends(IRenderContext rc, OxyRect rect, bool measureOnly = false)
{
// Render background and border around legend
if (!measureOnly && rect.Width > 0 && rect.Height > 0)
{
rc.DrawRectangleAsPolygon(rect, this.LegendBackground, this.LegendBorder, this.LegendBorderThickness);
}
double availableWidth = rect.Width;
double availableHeight = rect.Height;
double x = this.LegendPadding;
double top = this.LegendPadding;
var size = new OxySize();
// Render/measure the legend title
if (!string.IsNullOrEmpty(this.LegendTitle))
{
OxySize titleSize;
if (measureOnly)
{
titleSize = rc.MeasureMathText(
this.LegendTitle,
this.LegendTitleFont ?? this.DefaultFont,
this.LegendTitleFontSize,
this.LegendTitleFontWeight);
}
else
{
titleSize = rc.DrawMathText(
new ScreenPoint(rect.Left + x, rect.Top + top),
this.LegendTitle,
this.LegendTitleColor.GetActualColor(this.TextColor),
this.LegendTitleFont ?? this.DefaultFont,
this.LegendTitleFontSize,
this.LegendTitleFontWeight,
0,
HorizontalAlignment.Left,
VerticalAlignment.Top,
null,
true);
}
top += titleSize.Height;
size = new OxySize(x + titleSize.Width + this.LegendPadding, top + titleSize.Height);
}
double y = top;
double lineHeight = 0;
// tolerance for floating-point number comparisons
const double Epsilon = 1e-3;
// the maximum item with in the column being rendered (only used for vertical orientation)
double maxItemWidth = 0;
var items = this.LegendItemOrder == LegendItemOrder.Reverse
? this.Series.Reverse().Where(s => s.IsVisible)
: this.Series.Where(s => s.IsVisible);
// When orientation is vertical and alignment is center or right, the items cannot be rendered before
// the max item width has been calculated. Render the items for each column, and at the end.
var seriesToRender = new Dictionary <Series.Series, OxyRect>();
Action renderItems = () =>
{
foreach (var sr in seriesToRender)
{
var itemRect = sr.Value;
var itemSeries = sr.Key;
double rwidth = availableWidth;
if (itemRect.Left + rwidth + this.LegendPadding > rect.Left + availableWidth)
{
rwidth = rect.Left + availableWidth - itemRect.Left - this.LegendPadding;
}
double rheight = itemRect.Height;
if (rect.Top + rheight + this.LegendPadding > rect.Top + availableHeight)
{
rheight = rect.Top + availableHeight - rect.Top - this.LegendPadding;
}
var r = new OxyRect(itemRect.Left, itemRect.Top, Math.Max(rwidth, 0), Math.Max(rheight, 0));
this.RenderLegend(rc, itemSeries, r);
}
seriesToRender.Clear();
};
foreach (var s in items)
{
// Skip series with empty title
if (string.IsNullOrEmpty(s.Title) || !s.RenderInLegend)
{
continue;
}
var textSize = rc.MeasureMathText(s.Title, this.LegendFont ?? this.DefaultFont, this.LegendFontSize, this.LegendFontWeight);
double itemWidth = this.LegendSymbolLength + this.LegendSymbolMargin + textSize.Width;
double itemHeight = textSize.Height;
if (this.LegendOrientation == LegendOrientation.Horizontal)
{
// Add spacing between items
if (x > this.LegendPadding)
{
x += this.LegendItemSpacing;
}
// Check if the item is too large to fit within the available width
if (x + itemWidth > availableWidth - this.LegendPadding + Epsilon)
{
// new line
x = this.LegendPadding;
y += lineHeight + this.LegendLineSpacing;
lineHeight = 0;
}
// Update the max size of the current line
lineHeight = Math.Max(lineHeight, textSize.Height);
if (!measureOnly)
{
seriesToRender.Add(s, new OxyRect(rect.Left + x, rect.Top + y, itemWidth, itemHeight));
}
x += itemWidth;
// Update the max width and height of the legend box
size = new OxySize(Math.Max(size.Width, x), Math.Max(size.Height, y + textSize.Height));
}
else
{
if (y + itemHeight > availableHeight - this.LegendPadding + Epsilon)
{
renderItems();
y = top;
x += maxItemWidth + this.LegendColumnSpacing;
maxItemWidth = 0;
}
if (!measureOnly)
{
seriesToRender.Add(s, new OxyRect(rect.Left + x, rect.Top + y, itemWidth, itemHeight));
}
y += itemHeight + this.LegendLineSpacing;
// Update the max size of the items in the current column
maxItemWidth = Math.Max(maxItemWidth, itemWidth);
// Update the max width and height of the legend box
size = new OxySize(Math.Max(size.Width, x + itemWidth), Math.Max(size.Height, y));
}
}
renderItems();
if (size.Width > 0)
{
size = new OxySize(size.Width + this.LegendPadding, size.Height);
}
if (size.Height > 0)
{
size = new OxySize(size.Width, size.Height + this.LegendPadding);
}
if (size.Width > availableWidth)
{
size = new OxySize(availableWidth, size.Height);
}
if (size.Height > availableHeight)
{
size = new OxySize(size.Width, availableHeight);
}
if (!double.IsNaN(this.LegendMaxWidth) && size.Width > this.LegendMaxWidth)
{
size = new OxySize(this.LegendMaxWidth, size.Height);
}
if (!double.IsNaN(this.LegendMaxHeight) && size.Height > this.LegendMaxHeight)
{
size = new OxySize(size.Width, this.LegendMaxHeight);
}
return(size);
}
public static PlotModel DrawTextMaxSize()
{
var model = new PlotModel();
model.Annotations.Add(new DelegateAnnotation(rc =>
{
const string Font = "Arial";
const double FontSize = 32d;
const double FontWeight = FontWeights.Bold;
const double D = FontSize * 1.6;
const double X = 20;
const double X2 = 200;
double y = 20;
var testStrings = new[] { "iii", "jjj", "OxyPlot", "Bottom", "100", "KML" };
foreach (var text in testStrings)
{
var maxSize = rc.MeasureText(text, Font, FontSize, FontWeight);
var p = new ScreenPoint(X, y);
rc.DrawText(p, text, OxyColors.Black, Font, FontSize, FontWeight, maxSize: maxSize);
var rect = new OxyRect(p, maxSize);
rc.DrawRectangle(rect, OxyColors.Undefined, OxyColors.Black);
var p2 = new ScreenPoint(X2, y);
var maxSize2 = new OxySize(maxSize.Width / 2, maxSize.Height / 2);
rc.DrawText(p2, text, OxyColors.Black, Font, FontSize, FontWeight, maxSize: maxSize2);
var rect2 = new OxyRect(p2, maxSize2);
rc.DrawRectangle(rect2, OxyColors.Undefined, OxyColors.Black);
y += D;
}
}));
return model;
}
/// <summary>
/// Renders the series on the specified render context.
/// </summary>
/// <param name="rc">The rendering context.</param>
/// <param name="model">The model.</param>
public override void Render(IRenderContext rc, PlotModel model)
{
if (this.XAxis == null)
{
return;
}
this.symbolPosition = model.PlotArea.Bottom;
this.symbolSize = rc.MeasureText(this.Symbol, this.FontFamily, this.FontSize);
foreach (var v in this.Values)
{
if (double.IsNaN(v) || v < this.XAxis.ActualMinimum || v > this.XAxis.ActualMaximum)
{
continue;
}
double x = this.XAxis.Transform(v);
rc.DrawText(
new ScreenPoint(x, this.symbolPosition),
this.Symbol,
this.Color,
this.FontFamily,
this.FontSize,
FontWeights.Normal,
0,
HorizontalAlignment.Center,
VerticalAlignment.Bottom);
}
}
/// <summary>
/// Draws text with metrics.
/// </summary>
/// <param name="text">The text.</param>
/// <param name="font">The font.</param>
/// <param name="fontSize">Size of the font.</param>
/// <param name="expectedWidth">The expected width.</param>
/// <param name="expectedHeight">The expected height.</param>
/// <param name="baseline">The baseline position.</param>
/// <param name="xheight">The x-height position.</param>
/// <param name="ascent">The ascent position.</param>
/// <param name="descent">The descent position.</param>
/// <param name="before">The before position.</param>
/// <param name="after">The after position.</param>
/// <param name="platform">The platform.</param>
/// <returns>
/// A plot model.
/// </returns>
private static PlotModel DrawTextWithMetrics(string text, string font, double fontSize, double expectedWidth, double expectedHeight, double baseline, double xheight, double ascent, double descent, double before, double after, string platform)
{
// http://msdn.microsoft.com/en-us/library/ms742190(v=vs.110).aspx
// http://msdn.microsoft.com/en-us/library/xwf9s90b(v=vs.110).aspx
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms533824(v=vs.85).aspx
// https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/FontHandling/FontHandling.html
var model = new PlotModel();
model.Annotations.Add(
new DelegateAnnotation(
rc =>
{
var size = rc.MeasureText(text, font, fontSize);
var expectedSize = new OxySize(expectedWidth, expectedHeight);
rc.DrawText(new ScreenPoint(300, 50), "Font size: " + fontSize, OxyColors.Black, font, 12);
rc.DrawText(new ScreenPoint(300, 70), "Actual size: " + size.ToString("0.00", CultureInfo.InvariantCulture), OxyColors.Black, font, 12);
rc.DrawText(new ScreenPoint(300, 90), "Size on " + platform + ": " + expectedSize.ToString("0.00", CultureInfo.InvariantCulture), OxyColors.Green, font, 12);
var p = new ScreenPoint(20, 50);
rc.DrawText(p, text, OxyColors.Black, font, fontSize);
rc.FillCircle(p, 3, OxyColors.Black);
// actual bounds
rc.DrawRectangle(new OxyRect(p, size), OxyColors.Undefined, OxyColors.Black);
// Expected bounds (WPF)
rc.DrawRectangle(new OxyRect(p, expectedSize), OxyColors.Undefined, OxyColors.Green);
var color = OxyColor.FromAColor(180, OxyColors.Red);
var pen = new OxyPen(color);
// Expected vertical positions (WPF)
var x1 = p.X - 10;
var x2 = p.X + expectedSize.Width + 10;
rc.DrawLine(x1, baseline, x2, baseline, pen);
rc.DrawLine(x1, xheight, x2, xheight, pen);
rc.DrawLine(x1, ascent, x2, ascent, pen);
rc.DrawLine(x1, descent, x2, descent, pen);
// Expected horizonal positions (WPF)
var y1 = p.Y - 10;
var y2 = p.Y + expectedSize.Height + 10;
rc.DrawLine(before, y1, before, y2, pen);
rc.DrawLine(after, y1, after, y2, pen);
}));
model.MouseDown += (s, e) => Debug.WriteLine(e.Position);
return model;
}
/// <summary>
/// Measures the legends.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="availableSize">The available size for the legend box.</param>
/// <returns>The size of the legend box.</returns>
private OxySize MeasureLegends(IRenderContext rc, OxySize availableSize)
{
return this.RenderOrMeasureLegends(rc, new OxyRect(0, 0, availableSize.Width, availableSize.Height), true);
}
/// <summary>
/// Gets the coordinates of the (rotated) background rectangle.
/// </summary>
/// <param name="position">
/// The position.
/// </param>
/// <param name="size">
/// The size.
/// </param>
/// <param name="padding">
/// The padding.
/// </param>
/// <param name="rotation">
/// The rotation.
/// </param>
/// <param name="horizontalAlignment">
/// The horizontal alignment.
/// </param>
/// <param name="verticalAlignment">
/// The vertical alignment.
/// </param>
/// <returns>
/// The background rectangle coordinates.
/// </returns>
private static IList<ScreenPoint> GetTextBounds(
ScreenPoint position,
OxySize size,
OxyThickness padding,
double rotation,
HorizontalTextAlign horizontalAlignment,
VerticalTextAlign verticalAlignment)
{
double left, right, top, bottom;
switch (horizontalAlignment)
{
case HorizontalTextAlign.Center:
left = -size.Width * 0.5;
right = -left;
break;
case HorizontalTextAlign.Right:
left = -size.Width;
right = 0;
break;
default:
left = 0;
right = size.Width;
break;
}
switch (verticalAlignment)
{
case VerticalTextAlign.Middle:
top = -size.Height * 0.5;
bottom = -top;
break;
case VerticalTextAlign.Bottom:
top = -size.Height;
bottom = 0;
break;
default:
top = 0;
bottom = size.Height;
break;
}
double cost = Math.Cos(rotation / 180 * Math.PI);
double sint = Math.Sin(rotation / 180 * Math.PI);
var u = new ScreenVector(cost, sint);
var v = new ScreenVector(-sint, cost);
var polygon = new ScreenPoint[4];
polygon[0] = position + u * (left - padding.Left) + v * (top - padding.Top);
polygon[1] = position + u * (right + padding.Right) + v * (top - padding.Top);
polygon[2] = position + u * (right + padding.Right) + v * (bottom + padding.Bottom);
polygon[3] = position + u * (left - padding.Left) + v * (bottom + padding.Bottom);
return polygon;
}
/// <summary>
/// Renders or measures the legends.
/// </summary>
/// <param name="rc">The render context.</param>
/// <param name="rect">Provides the available size if measuring, otherwise it provides the position and size of the legend.</param>
/// <param name="measureOnly">Specify if the size of the legend box should be measured only (not rendered).</param>
/// <returns>The size of the legend box.</returns>
private OxySize RenderOrMeasureLegends(IRenderContext rc, OxyRect rect, bool measureOnly = false)
{
// Render background and border around legend
if (!measureOnly && rect.Width > 0 && rect.Height > 0)
{
rc.DrawRectangleAsPolygon(rect, this.LegendBackground, this.LegendBorder, this.LegendBorderThickness);
}
double availableWidth = rect.Width;
double availableHeight = rect.Height;
double x = this.LegendPadding;
double top = this.LegendPadding;
var size = new OxySize();
// Render/measure the legend title
if (!string.IsNullOrEmpty(this.LegendTitle))
{
OxySize titleSize;
if (measureOnly)
{
titleSize = rc.MeasureMathText(
this.LegendTitle,
this.LegendTitleFont ?? this.DefaultFont,
this.LegendTitleFontSize,
this.LegendTitleFontWeight);
}
else
{
titleSize = rc.DrawMathText(
new ScreenPoint(rect.Left + x, rect.Top + top),
this.LegendTitle,
this.LegendTitleColor.GetActualColor(this.TextColor),
this.LegendTitleFont ?? this.DefaultFont,
this.LegendTitleFontSize,
this.LegendTitleFontWeight,
0,
HorizontalAlignment.Left,
VerticalAlignment.Top,
null,
true);
}
top += titleSize.Height;
size.Width = x + titleSize.Width + this.LegendPadding;
size.Height = top + titleSize.Height;
}
double y = top;
double lineHeight = 0;
// tolerance for floating-point number comparisons
const double Epsilon = 1e-3;
// the maximum item with in the column being rendered (only used for vertical orientation)
double maxItemWidth = 0;
var items = this.LegendItemOrder == LegendItemOrder.Reverse
? this.Series.Reverse().Where(s => s.IsVisible)
: this.Series.Where(s => s.IsVisible);
// When orientation is vertical and alignment is center or right, the items cannot be rendered before
// the max item width has been calculated. Render the items for each column, and at the end.
var seriesToRender = new Dictionary<Series.Series, OxyRect>();
Action renderItems = () =>
{
foreach (var sr in seriesToRender)
{
var itemRect = sr.Value;
var itemSeries = sr.Key;
double rwidth = availableWidth;
if (itemRect.Left + rwidth + this.LegendPadding > rect.Left + availableWidth)
{
rwidth = rect.Left + availableWidth - itemRect.Left - this.LegendPadding;
}
double rheight = itemRect.Height;
if (rect.Top + rheight + this.LegendPadding > rect.Top + availableHeight)
{
rheight = rect.Top + availableHeight - rect.Top - this.LegendPadding;
}
var r = new OxyRect(itemRect.Left, itemRect.Top, Math.Max(rwidth, 0), Math.Max(rheight, 0));
this.RenderLegend(rc, itemSeries, r);
}
seriesToRender.Clear();
};
foreach (var s in items)
{
// Skip series with empty title
if (string.IsNullOrEmpty(s.Title))
{
continue;
}
var textSize = rc.MeasureMathText(s.Title, this.LegendFont ?? this.DefaultFont, this.LegendFontSize, this.LegendFontWeight);
double itemWidth = this.LegendSymbolLength + this.LegendSymbolMargin + textSize.Width;
double itemHeight = textSize.Height;
if (this.LegendOrientation == LegendOrientation.Horizontal)
{
// Add spacing between items
if (x > this.LegendPadding)
{
x += this.LegendItemSpacing;
}
// Check if the item is too large to fit within the available width
if (x + itemWidth > availableWidth - this.LegendPadding + Epsilon)
{
// new line
x = this.LegendPadding;
y += lineHeight;
lineHeight = 0;
}
// Update the max size of the current line
lineHeight = Math.Max(lineHeight, textSize.Height);
if (!measureOnly)
{
seriesToRender.Add(s, new OxyRect(rect.Left + x, rect.Top + y, itemWidth, itemHeight));
}
x += itemWidth;
// Update the max width of the legend box
size.Width = Math.Max(size.Width, x);
// Update the max height of the legend box
size.Height = Math.Max(size.Height, y + textSize.Height);
}
else
{
if (y + itemHeight > availableHeight - this.LegendPadding + Epsilon)
{
renderItems();
y = top;
x += maxItemWidth + this.LegendColumnSpacing;
maxItemWidth = 0;
}
if (!measureOnly)
{
seriesToRender.Add(s, new OxyRect(rect.Left + x, rect.Top + y, itemWidth, itemHeight));
}
y += itemHeight;
// Update the max size of the items in the current column
maxItemWidth = Math.Max(maxItemWidth, itemWidth);
// Update the max width of the legend box
size.Width = Math.Max(size.Width, x + itemWidth);
// Update the max height of the legend box
size.Height = Math.Max(size.Height, y);
}
}
renderItems();
if (size.Width > 0)
{
size.Width += this.LegendPadding;
}
if (size.Height > 0)
{
size.Height += this.LegendPadding;
}
if (size.Width > availableWidth)
{
size.Width = availableWidth;
}
if (size.Height > availableHeight)
{
size.Height = availableHeight;
}
if (!double.IsNaN(this.LegendMaxWidth) && size.Width > this.LegendMaxWidth)
{
size.Width = this.LegendMaxWidth;
}
return size;
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="p">The p.</param>
/// <param name="text">The text.</param>
/// <param name="c">The c.</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 rotate.</param>
/// <param name="halign">The horizontal alignment.</param>
/// <param name="valign">The vertical alignment.</param>
/// <param name="maxSize">Size of the max.</param>
public override void DrawText(
ScreenPoint p,
string text,
OxyColor c,
string fontFamily,
double fontSize,
double fontWeight,
double rotate,
HorizontalAlignment halign,
VerticalAlignment valign,
OxySize? maxSize)
{
if (string.IsNullOrEmpty(text))
{
return;
}
var lines = Regex.Split(text, "\r\n");
if (valign == VerticalAlignment.Bottom)
{
for (var i = lines.Length - 1; i >= 0; i--)
{
var line = lines[i];
var size = this.MeasureText(line, fontFamily, fontSize, fontWeight);
this.w.WriteText(p, line, c, fontFamily, fontSize, fontWeight, rotate, halign, valign);
p.X += Math.Sin(rotate / 180.0 * Math.PI) * size.Height;
p.Y -= Math.Cos(rotate / 180.0 * Math.PI) * size.Height;
}
}
else
{
foreach (var line in lines)
{
var size = this.MeasureText(line, fontFamily, fontSize, fontWeight);
this.w.WriteText(p, line, c, fontFamily, fontSize, fontWeight, rotate, halign, valign);
p.X -= Math.Sin(rotate / 180.0 * Math.PI) * size.Height;
p.Y += Math.Cos(rotate / 180.0 * Math.PI) * size.Height;
}
}
}
/// <summary>
/// The measure string.
/// </summary>
/// <param name="faceName">
/// The font face name.
/// </param>
/// <param name="height">
/// The height.
/// </param>
/// <param name="weight">
/// The weight.
/// </param>
/// <param name="str">
/// The string.
/// </param>
/// <returns>
/// The size of the rendered string.
/// </returns>
public static OxySize MeasureString(string faceName, int height, int weight, string str)
{
var lines = Regex.Split(str, "\r\n");
OxySize result = new OxySize(0, 0);
foreach (var line in lines)
{
var hfont = CreateFont(height, 0, 0, 0, weight, 0, 0, 0, 0, 0, 0, 0, 0, faceName);
var hdc = GetDC(IntPtr.Zero);
var oldobj = SelectObject(hdc, hfont);
var temp = GetTextExtent(hdc, line);
SelectObject(hdc, oldobj);
DeleteObject(hfont);
DeleteDC(hdc);
var lineSpacing = temp.Height / 3.0;
result.Height += temp.Height + lineSpacing;
result.Width = Math.Max(temp.Width * 1.28, result.Width);
}
return result;
}
/// <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>
/// Initializes a new instance of the <see cref="OxyRect"/> struct by location and size.
/// </summary>
/// <param name="p0">The location.</param>
/// <param name="size">The size.</param>
public OxyRect(ScreenPoint p0, OxySize size)
: this(p0.X, p0.Y, size.Width, size.Height)
{
}
/// <summary>
/// Calculates the plot area (subtract padding, title size and outside legends)
/// </summary>
/// <param name="rc">The rendering context.</param>
private void UpdatePlotArea(IRenderContext rc)
{
var plotArea = new OxyRect(
this.PlotBounds.Left + this.Padding.Left,
this.PlotBounds.Top + this.Padding.Top,
Math.Max(0, this.Width - this.Padding.Left - this.Padding.Right),
Math.Max(0, this.Height - this.Padding.Top - this.Padding.Bottom));
var titleSize = this.MeasureTitles(rc);
if (titleSize.Height > 0)
{
var titleHeight = titleSize.Height + this.TitlePadding;
plotArea = new OxyRect(plotArea.Left, plotArea.Top + titleHeight, plotArea.Width, Math.Max(0, plotArea.Height - titleHeight));
}
plotArea = plotArea.Deflate(this.ActualPlotMargins);
if (this.IsLegendVisible)
{
// Make space for legends
OxySize maxLegendSize = new OxySize(0, 0);
double legendMargin = 0;
// first run Outside Left-Side legends
foreach (var legend in this.Legends.Where(l =>
l.LegendPlacement == LegendPlacement.Outside && (l.IsLegendVisible &&
(l.LegendPosition == LegendPosition.LeftTop || l.LegendPosition == LegendPosition.LeftMiddle || l.LegendPosition == LegendPosition.LeftBottom))))
{
// Find the available size for the legend box
var availableLegendWidth = plotArea.Width;
var availableLegendHeight = double.IsNaN(legend.LegendMaxHeight) ?
plotArea.Height : Math.Min(plotArea.Height, legend.LegendMaxHeight);
var lsiz = legend.GetLegendSize(rc, new OxySize(availableLegendWidth, availableLegendHeight));
legend.LegendSize = lsiz;
maxLegendSize = new OxySize(maxLegendSize.Width > lsiz.Width ? maxLegendSize.Width : lsiz.Width, maxLegendSize.Height > lsiz.Height ? maxLegendSize.Height : lsiz.Height);
if (legend.LegendMargin > legendMargin)
{
legendMargin = legend.LegendMargin;
}
}
// Adjust the plot area after the size of the legend has been calculated
if (maxLegendSize.Width > 0 || maxLegendSize.Height > 0)
{
plotArea = new OxyRect(plotArea.Left + maxLegendSize.Width + legendMargin, plotArea.Top, Math.Max(0, plotArea.Width - (maxLegendSize.Width + legendMargin)), plotArea.Height);
}
maxLegendSize = new OxySize(0, 0);
legendMargin = 0;
// second run Outside Right-Side legends
foreach (var legend in this.Legends.Where(l =>
l.LegendPlacement == LegendPlacement.Outside && (l.IsLegendVisible &&
(l.LegendPosition == LegendPosition.RightTop || l.LegendPosition == LegendPosition.RightMiddle || l.LegendPosition == LegendPosition.RightBottom))))
{
// Find the available size for the legend box
var availableLegendWidth = plotArea.Width;
var availableLegendHeight = double.IsNaN(legend.LegendMaxHeight) ?
plotArea.Height : Math.Min(plotArea.Height, legend.LegendMaxHeight);
var lsiz = legend.GetLegendSize(rc, new OxySize(availableLegendWidth, availableLegendHeight));
legend.LegendSize = lsiz;
maxLegendSize = new OxySize(maxLegendSize.Width > lsiz.Width ? maxLegendSize.Width : lsiz.Width, maxLegendSize.Height > lsiz.Height ? maxLegendSize.Height : lsiz.Height);
if (legend.LegendMargin > legendMargin)
{
legendMargin = legend.LegendMargin;
}
}
// Adjust the plot area after the size of the legend has been calculated
if (maxLegendSize.Width > 0 || maxLegendSize.Height > 0)
{
plotArea = new OxyRect(plotArea.Left, plotArea.Top, Math.Max(0, plotArea.Width - (maxLegendSize.Width + legendMargin)), plotArea.Height);
}
maxLegendSize = new OxySize(0, 0);
legendMargin = 0;
// third run Outside Top legends
foreach (var legend in this.Legends.Where(l =>
l.LegendPlacement == LegendPlacement.Outside && (l.IsLegendVisible &&
(l.LegendPosition == LegendPosition.TopLeft || l.LegendPosition == LegendPosition.TopCenter || l.LegendPosition == LegendPosition.TopRight))))
{
// Find the available size for the legend box
var availableLegendWidth = plotArea.Width;
var availableLegendHeight = double.IsNaN(legend.LegendMaxHeight) ?
plotArea.Height : Math.Min(plotArea.Height, legend.LegendMaxHeight);
var lsiz = legend.GetLegendSize(rc, new OxySize(availableLegendWidth, availableLegendHeight));
legend.LegendSize = lsiz;
maxLegendSize = new OxySize(maxLegendSize.Width > lsiz.Width ? maxLegendSize.Width : lsiz.Width, maxLegendSize.Height > lsiz.Height ? maxLegendSize.Height : lsiz.Height);
if (legend.LegendMargin > legendMargin)
{
legendMargin = legend.LegendMargin;
}
}
// Adjust the plot area after the size of the legend has been calculated
if (maxLegendSize.Width > 0 || maxLegendSize.Height > 0)
{
plotArea = new OxyRect(plotArea.Left, plotArea.Top + maxLegendSize.Height + legendMargin, plotArea.Width, Math.Max(0, plotArea.Height - (maxLegendSize.Height + legendMargin)));
}
maxLegendSize = new OxySize(0, 0);
legendMargin = 0;
// fourth run Outside Bottom legends
foreach (var legend in this.Legends.Where(l =>
l.LegendPlacement == LegendPlacement.Outside && (l.IsLegendVisible &&
(l.LegendPosition == LegendPosition.BottomLeft || l.LegendPosition == LegendPosition.BottomCenter || l.LegendPosition == LegendPosition.BottomRight))))
{
// Find the available size for the legend box
var availableLegendWidth = plotArea.Width;
var availableLegendHeight = double.IsNaN(legend.LegendMaxHeight) ?
plotArea.Height : Math.Min(plotArea.Height, legend.LegendMaxHeight);
var lsiz = legend.GetLegendSize(rc, new OxySize(availableLegendWidth, availableLegendHeight));
legend.LegendSize = lsiz;
maxLegendSize = new OxySize(maxLegendSize.Width > lsiz.Width ? maxLegendSize.Width : lsiz.Width, maxLegendSize.Height > lsiz.Height ? maxLegendSize.Height : lsiz.Height);
if (legend.LegendMargin > legendMargin)
{
legendMargin = legend.LegendMargin;
}
}
// Adjust the plot area after the size of the legend has been calculated
if (maxLegendSize.Width > 0 || maxLegendSize.Height > 0)
{
plotArea = new OxyRect(plotArea.Left, plotArea.Top, plotArea.Width, Math.Max(0, plotArea.Height - (maxLegendSize.Height + legendMargin)));
}
// Finally calculate size of inside legends
foreach (var legend in this.Legends.Where(l => l.LegendPlacement == LegendPlacement.Inside && l.IsLegendVisible))
{
// Find the available size for the legend box
var availableLegendWidth = plotArea.Width;
var availableLegendHeight = double.IsNaN(legend.LegendMaxHeight) ?
plotArea.Height : Math.Min(plotArea.Height, legend.LegendMaxHeight);
if (legend.LegendPlacement == LegendPlacement.Inside)
{
availableLegendWidth -= legend.LegendMargin * 2;
availableLegendHeight -= legend.LegendMargin * 2;
}
legend.LegendSize = legend.GetLegendSize(rc, new OxySize(availableLegendWidth, availableLegendHeight));
}
}
// Ensure the plot area is valid
if (plotArea.Height < 0)
{
plotArea = new OxyRect(plotArea.Left, plotArea.Top, plotArea.Width, 1);
}
if (plotArea.Width < 0)
{
plotArea = new OxyRect(plotArea.Left, plotArea.Top, 1, plotArea.Height);
}
this.PlotArea = plotArea;
this.PlotAndAxisArea = plotArea.Inflate(this.ActualPlotMargins);
switch (this.TitleHorizontalAlignment)
{
case TitleHorizontalAlignment.CenteredWithinView:
this.TitleArea = new OxyRect(
this.PlotBounds.Left,
this.PlotBounds.Top + this.Padding.Top,
this.Width,
titleSize.Height + (this.TitlePadding * 2));
break;
default:
this.TitleArea = new OxyRect(
this.PlotArea.Left,
this.PlotBounds.Top + this.Padding.Top,
this.PlotArea.Width,
titleSize.Height + (this.TitlePadding * 2));
break;
}
// Calculate the legend area for each legend.
foreach (var l in this.Legends)
{
l.LegendArea = l.GetLegendRectangle(l.LegendSize);
}
}