/// <summary>Calculate major anchor points</summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void CalcFrame(SKImageInfo info, SKCanvas canvas)
{
// the vertical center line
float vertCenter = Convert.ToSingle(info.Width / 2.0);
// length to use for outer square - shortest of vertical vs horizontal
int edgeLen = new int[] { info.Width, info.Height }.Min();
// 1/2 the distance
float halfEdge = edgeLen / 2.0F;
// set the arc line thickness
this.ArcLineWidth = (edgeLen / 20.0F) * this.ArcLineThickness;
// inset border of the graph frame based on the arc line width
float border = this.ArcLineWidth * BorderFactor;
// center of the drawing area
this.Origin = new SKPoint(vertCenter, info.Height / 2.0F);
// the square to draw the ring inside of
this.OuterRect = new SKRect(this.Origin.X - halfEdge + border, this.Origin.Y - halfEdge + border, this.Origin.X + halfEdge - 1 - border, this.Origin.Y + halfEdge - 1 - border);
// the square inscribed inside the circle
this.InscribedRect = QuickCalc.InscribeSquare(this.Origin, halfEdge - border);
// calculate the font for the labels, the same width is used for both which could cause issues
this.PrimeLabelMetrics = this.CalculateLabels(this.PrimeLabel, this.PrimeLabelAttributes, this.PrimeLabelFontScale);
this.SubLabelMetrics = this.CalculateLabels(this.SubLabel, this.SubLabelAttributes, this.SubLabelFontScale);
}
/// <summary>Calculate major anchor points</summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void CalcFrame(SKImageInfo info, SKCanvas canvas)
{
// center of the drawing area
this.Origin = new SKPoint(info.Width / 2.0F, info.Height / 2.0F);
// calc the outer frame
this.ControlFrame = new SKRect(0, 0, info.Width - 1, info.Height - 1);
this.GraphFrame = new SKRect(this.ControlFrame.Left + this.YLabelWidth, this.ControlFrame.Top + this.TitleHeight,
this.ControlFrame.Right - this.RightMarginWidth, this.ControlFrame.Bottom - this.XLabelHeight);
// calc the label metrics
this.XLabelMetrics = this.CalculateXLabels(this.XLabelHeight - this._xbreath);
this.YLabelMetrics = this.CalculateYLabels(this.YLabelWidth - this._ybreath);
}
/// <summary>Calculate major anchor points</summary>
/// <param name="info"></param>
/// <param name="canvas"></param>
private void CalcFrame(SKImageInfo info, SKCanvas canvas)
{
// center of the drawing area
this.Origin = new SKPoint(info.Width / 2.0F, info.Height / 2.0F);
// calc the outer frame
this.GraphFrame = new SKRect(0, 0, info.Width - 1, info.Height - 1);
// calculate the number of frames and their width
int frameCnt = (this.Entries == null || this.Entries.Count < 2) ? 1 : this.Entries.Count;
float frameWidth = Convert.ToSingle(this.GraphFrame.Width) / frameCnt;
// calc the dimensions on the X Label area - space needed to render all the text
this.XLabelMetrics = (this.Entries != null) ? this.CalculateXLabels(frameWidth) :
new LabelMetrics(100.0F, 0.0F, 0.0F);
// calc the inner frame subtracting the max X label font height and the breath area
this.BarFrame = new SKRect(this.GraphFrame.Left, this.GraphFrame.Top, this.GraphFrame.Right,
this.GraphFrame.Bottom - this.XLabelMetrics.Height - this._xbreath);
// calc each bars drawing rect
this.Frames = new ColumnEntry[frameCnt];
float left = this.BarFrame.Left;
// iterate all the frames since entries may be null
for (int i = 0; i < this.Frames.Length; ++i)
{
this.Frames[i] = new ColumnEntry()
{
Frame = new SKRect(left, this.BarFrame.Top, left + frameWidth, this.BarFrame.Bottom),
Entry = (this.Entries == null || this.Entries.Count < 1) ? new GraphEntry() : this.Entries[i],
LabelFrame = new SKRect(left, this.BarFrame.Bottom + this._xbreath, left + frameWidth, this.BarFrame.Bottom + this.XLabelMetrics.Height + this._xbreath)
};
left += frameWidth;
}
}
/// <summary>Calculates the needed font size for the X labels</summary>
/// <returns></returns>
/// <remarks>Right now only calculates the prime label text box</remarks>
internal LabelMetrics CalculateLabels(string label, FontAttributes attr, float fontScale = 100.0F)
{
// if the label is empty
if (String.IsNullOrEmpty(label))
{
return(LabelMetrics.Default());
}
if (fontScale < 1)
{
fontScale = 1.0F;
}
float maxHeight = 0.0F;
float fontSize = 250.0F;
float desc = 0.0F;
// set the max label width to some default
// use the inscribed square width
//this.MaxPrimeLabelWidth = this.OuterRect.Width - (this.ArcLineWidth * BorderFactor * 2.0F);
this.MaxPrimeLabelWidth = this.InscribedRect.Width;
// determine the ideal font
using (SKPaint textPaint = new SKPaint())
{
// init the font with all its properties
this.SetFont(textPaint, fontSize, attr);
// find the min font size for the width
LabelMetrics widthMet = QuickCalc.CalcSizeForWidth(textPaint, this.MaxPrimeLabelWidth, label);
textPaint.TextSize = widthMet.FontSize;
// get the NEW font metrics which includes max height
SKFontMetrics metrics;
textPaint.GetFontMetrics(out metrics);
// set the calculated values thus far
desc = metrics.Descent;
maxHeight = metrics.Descent - metrics.Ascent;
// for fun calculate the width of the circle at the top of the text
//float chord = Convert.ToSingle( QuickCalc.CalcChord( this.OuterRect.Width / 2.0F, maxHeight / 2.0F ) );
//this.MaxPrimeLabelWidth = chord - ( this.ArcLineWidth * BorderFactor * 2.0F );
// now check its not too tall
if (maxHeight > this.InscribedRect.Height)
{
// scale the font further based on height
float scale = this.InscribedRect.Height / maxHeight;
textPaint.TextSize = textPaint.TextSize * scale;
}
// now scale by the relative user set scale
if (fontScale < 100.0F)
{
textPaint.TextSize = textPaint.TextSize * (fontScale / 100.0F);
}
// remeasure after user set scaling
textPaint.GetFontMetrics(out metrics);
fontSize = textPaint.TextSize;
desc = metrics.Descent;
maxHeight = metrics.Descent - metrics.Ascent;
}
return(new LabelMetrics(fontSize, maxHeight, desc));
}
