/// <summary>
/// Draw The legend
/// </summary>
/// <param name="g">The graphics surface on which to draw</param>
/// <param name="position">The position of the top left of the axis.</param>
/// <param name="plots">Array of plot objects to appear in the legend.</param>
/// <param name="scale">if the legend is set to scale, the amount to scale by.</param>
/// <returns>bounding box</returns>
public Rectangle Draw(Graphics g, Point position, ArrayList plots, float scale)
{
// first of all determine the Font to use in the legend.
Font textFont;
if (this.AutoScaleText)
{
textFont = Utils.ScaleFont(this.font_, scale);
}
else
{
textFont = this.font_;
}
// determine max width and max height of label strings and
// count the labels.
int labelCount = 0;
int maxHt = 0;
int maxWd = 0;
int unnamedCount = 0;
for (int i = 0; i < plots.Count; ++i)
{
if (!(plots[i] is IPlot))
{
continue;
}
IPlot p = (IPlot)plots[i];
if (!p.ShowInLegend)
{
continue;
}
string label = p.Label;
if (label == "")
{
unnamedCount += 1;
label = "Series " + unnamedCount.ToString();
}
SizeF labelSize = g.MeasureString(label, textFont);
if (labelSize.Height > maxHt)
{
maxHt = (int)labelSize.Height;
}
if (labelSize.Width > maxWd)
{
maxWd = (int)labelSize.Width;
}
++labelCount;
}
bool extendingHorizontally = numberItemsHorizontally_ == -1;
bool extendingVertically = numberItemsVertically_ == -1;
// determine width in legend items count units.
int widthInItemCount = 0;
if (extendingVertically)
{
if (labelCount >= numberItemsHorizontally_)
{
widthInItemCount = numberItemsHorizontally_;
}
else
{
widthInItemCount = labelCount;
}
}
else if (extendingHorizontally)
{
widthInItemCount = labelCount / numberItemsVertically_;
if (labelCount % numberItemsVertically_ != 0)
{
widthInItemCount += 1;
}
}
else
{
throw new NPlotException("logic error in legend base");
}
// determine height of legend in items count units.
int heightInItemCount = 0;
if (extendingHorizontally)
{
if (labelCount >= numberItemsVertically_)
{
heightInItemCount = numberItemsVertically_;
}
else
{
heightInItemCount = labelCount;
}
}
else // extendingVertically
{
heightInItemCount = labelCount / numberItemsHorizontally_;
if (labelCount % numberItemsHorizontally_ != 0)
{
heightInItemCount += 1;
}
}
int lineLength = 20;
int hSpacing = (int)(5.0f * scale);
int vSpacing = (int)(3.0f * scale);
int boxWidth = (int)((float)widthInItemCount * (lineLength + maxWd + hSpacing * 2.0f) + hSpacing);
int boxHeight = (int)((float)heightInItemCount * (maxHt + vSpacing) + vSpacing);
int totalWidth = boxWidth;
int totalHeight = boxHeight;
// draw box around the legend.
if (this.BorderStyle == BorderType.Line)
{
g.FillRectangle(new SolidBrush(this.bgColor_), position.X, position.Y, boxWidth, boxHeight);
g.DrawRectangle(new Pen(this.borderColor_), position.X, position.Y, boxWidth, boxHeight);
}
else if (this.BorderStyle == BorderType.Shadow)
{
int offset = (int)(4.0f * scale);
g.FillRectangle(new SolidBrush(Color.FromArgb(128, Color.Gray)), position.X + offset, position.Y + offset, boxWidth, boxHeight);
g.FillRectangle(new SolidBrush(this.bgColor_), position.X, position.Y, boxWidth, boxHeight);
g.DrawRectangle(new Pen(this.borderColor_), position.X, position.Y, boxWidth, boxHeight);
totalWidth += offset;
totalHeight += offset;
}
/*
* else if ( this.BorderStyle == BorderType.Curved )
* {
* // TODO. make this nice.
* }
*/
else
{
// do nothing.
}
// now draw entries in box..
labelCount = 0;
unnamedCount = 0;
int plotCount = -1;
for (int i = 0; i < plots.Count; ++i)
{
if (!(plots[i] is IPlot))
{
continue;
}
IPlot p = (IPlot)plots[i];
if (!p.ShowInLegend)
{
continue;
}
plotCount += 1;
int xpos, ypos;
if (extendingVertically)
{
xpos = plotCount % numberItemsHorizontally_;
ypos = plotCount / numberItemsHorizontally_;
}
else
{
xpos = plotCount / numberItemsVertically_;
ypos = plotCount % numberItemsVertically_;
}
int lineXPos = (int)(position.X + hSpacing + xpos * (lineLength + maxWd + hSpacing * 2.0f));
int lineYPos = (int)(position.Y + vSpacing + ypos * (vSpacing + maxHt));
p.DrawInLegend(g, new Rectangle(lineXPos, lineYPos, lineLength, maxHt));
int textXPos = lineXPos + hSpacing + lineLength;
int textYPos = lineYPos;
string label = p.Label;
if (label == "")
{
unnamedCount += 1;
label = "Series " + unnamedCount.ToString();
}
g.DrawString(label, textFont,
new SolidBrush(this.textColor_), textXPos, textYPos);
++labelCount;
}
return(new Rectangle(position.X, position.Y, totalWidth, totalHeight));
}
/// <summary>
/// Draw The legend
/// </summary>
/// <param name="ctx">The Drawing Context with on which to draw</param>
/// <param name="position">The position of the top left of the axis.</param>
/// <param name="plots">Array of plot objects to appear in the legend.</param>
/// <param name="scale">if the legend is set to scale, the amount to scale by.</param>
/// <returns>bounding box</returns>
public Rectangle Draw(Context ctx, Point position, ArrayList plots, double scale)
{
// first of all determine the Font to use in the legend.
Font textFont;
if (AutoScaleText)
{
textFont = font_.WithScaledSize(scale);
}
else
{
textFont = font_;
}
ctx.Save();
// determine max width and max height of label strings and
// count the labels.
int labelCount = 0;
int unnamedCount = 0;
double maxHt = 0;
double maxWd = 0;
TextLayout layout = new TextLayout();
layout.Font = textFont;
for (int i = 0; i < plots.Count; ++i)
{
if (!(plots[i] is IPlot))
{
continue;
}
IPlot p = (IPlot)plots[i];
if (!p.ShowInLegend)
{
continue;
}
string label = p.Label;
if (label == "")
{
unnamedCount += 1;
label = "Series " + unnamedCount.ToString();
}
layout.Text = label;
Size labelSize = layout.GetSize();
if (labelSize.Height > maxHt)
{
maxHt = labelSize.Height;
}
if (labelSize.Width > maxWd)
{
maxWd = labelSize.Width;
}
++labelCount;
}
bool extendingHorizontally = numberItemsHorizontally_ == -1;
bool extendingVertically = numberItemsVertically_ == -1;
// determine width in legend items count units.
int widthInItemCount = 0;
if (extendingVertically)
{
if (labelCount >= numberItemsHorizontally_)
{
widthInItemCount = numberItemsHorizontally_;
}
else
{
widthInItemCount = labelCount;
}
}
else if (extendingHorizontally)
{
widthInItemCount = labelCount / numberItemsVertically_;
if (labelCount % numberItemsVertically_ != 0)
{
widthInItemCount += 1;
}
}
else
{
throw new XwPlotException("logic error in legend base");
}
// determine height of legend in items count units.
int heightInItemCount = 0;
if (extendingHorizontally)
{
if (labelCount >= numberItemsVertically_)
{
heightInItemCount = numberItemsVertically_;
}
else
{
heightInItemCount = labelCount;
}
}
else // extendingVertically
{
heightInItemCount = labelCount / numberItemsHorizontally_;
if (labelCount % numberItemsHorizontally_ != 0)
{
heightInItemCount += 1;
}
}
double lineLength = 20;
double hSpacing = (int)(5.0f * scale);
double vSpacing = (int)(3.0f * scale);
double boxWidth = (int)((float)widthInItemCount * (lineLength + maxWd + hSpacing * 2.0f) + hSpacing);
double boxHeight = (int)((float)heightInItemCount * (maxHt + vSpacing) + vSpacing);
double totalWidth = boxWidth;
double totalHeight = boxHeight;
// draw box around the legend.
if (BorderStyle == BorderType.Line)
{
ctx.SetColor(bgColor_);
ctx.Rectangle(position.X, position.Y, boxWidth, boxHeight);
ctx.FillPreserve();
ctx.SetColor(borderColor_);
ctx.Stroke();
}
else if (BorderStyle == BorderType.Shadow)
{
double offset = (4.0 * scale);
Color shade = Colors.Gray;
shade.Alpha = 0.5;
ctx.SetColor(Colors.Gray);
ctx.Rectangle(position.X + offset, position.Y + offset, boxWidth, boxHeight);
ctx.Fill();
ctx.SetColor(bgColor_);
ctx.Rectangle(position.X, position.Y, boxWidth, boxHeight);
ctx.FillPreserve();
ctx.SetColor(borderColor_);
ctx.Stroke();
totalWidth += offset;
totalHeight += offset;
}
/*
* else if ( this.BorderStyle == BorderType.Curved )
* {
* // TODO. make this nice.
* }
*/
else
{
// do nothing.
}
// now draw entries in box..
labelCount = 0;
unnamedCount = 0;
int plotCount = -1;
for (int i = 0; i < plots.Count; ++i)
{
if (!(plots[i] is IPlot))
{
continue;
}
IPlot p = (IPlot)plots[i];
if (!p.ShowInLegend)
{
continue;
}
plotCount += 1;
double xpos, ypos;
if (extendingVertically)
{
xpos = plotCount % numberItemsHorizontally_;
ypos = plotCount / numberItemsHorizontally_;
}
else
{
xpos = plotCount / numberItemsVertically_;
ypos = plotCount % numberItemsVertically_;
}
double lineXPos = (position.X + hSpacing + xpos * (lineLength + maxWd + hSpacing * 2.0));
double lineYPos = (position.Y + vSpacing + ypos * (vSpacing + maxHt));
p.DrawInLegend(ctx, new Rectangle(lineXPos, lineYPos, lineLength, maxHt));
double textXPos = lineXPos + hSpacing + lineLength;
double textYPos = lineYPos;
string label = p.Label;
if (label == "")
{
unnamedCount += 1;
label = "Series " + unnamedCount.ToString();
}
layout.Text = label;
ctx.DrawTextLayout(layout, textXPos, textYPos);
++labelCount;
}
ctx.Restore();
return(new Rectangle(position.X, position.Y, totalWidth, totalHeight));
}
