void performPaintLegend(Graphics g, ChartRegion region_legend)
{
if (0 == region_legend.Height)
{
return;
}
double cumulative_legend_text_width = 0.0;
// Resize the font of the legend as more series are added
int legendFontSize = 14 - series_list.Count / 2;
legendFontSize = Math.Max(legendFontSize, 4);
if (font_legend.Size != legendFontSize)
{
font_legend = new Font(FontFamily.GenericSansSerif, legendFontSize);
}
// Count the space for the text labels
SizeF[] measurements = new SizeF[series_list.Count];
for (int i = 0; i < series_list.Count; ++i)
{
Series series = (Series)series_list[i];
measurements[i] = g.MeasureString(series.name, font_legend);
cumulative_legend_text_width += measurements[i].Width;
}
// Add in the space for the gaps and the indicators
cumulative_legend_text_width += legend_gap_width * (series_list.Count - 1);
cumulative_legend_text_width += legend_indicator_size * series_list.Count;
cumulative_legend_text_width += legend_indicator_gap_width * series_list.Count;
double left_offset = region_legend.Left + (region_legend.Width - cumulative_legend_text_width) / 2;
// Now write out the labels
double current_offset = left_offset;
for (int i = 0; i < series_list.Count; ++i)
{
Series series = (Series)series_list[i];
brush_legend.Color = series.color;
pen_legend.Color = series.color;
double indicator_top = region_legend.Top + (region_legend.Height - legend_indicator_size) / 2.0;
double text_top = region_legend.Top + (region_legend.Height - measurements[i].Height) / 2.0;
renderSeriesLegend(i, series, g, pen_legend, brush_legend, (float)(current_offset + legend_indicator_size / 2.0), (float)(indicator_top + legend_indicator_size / 2.0), (float)legend_indicator_size);
current_offset += legend_indicator_size;
current_offset += legend_indicator_gap_width;
g.DrawString(series.name, font_legend, brush_legend, (float)current_offset, (float)text_top);
current_offset += measurements[i].Width;
current_offset += legend_gap_width;
}
}
void performPaintY1Axis(Graphics g, ChartRegion region_chart, ChartRegion region_y1_axis, Point2D min, Point2D max)
{
// Check that we have at least one series of our kind
if (!haveSeriesForChartAxis(ChartAxis.Primary))
{
return;
}
// Draw in the ticks
double y_extent = region_y1_axis.Height;
int tick_divisor = determineTickDivisor(y_extent, axis_tick_gap_min);
// Calculate the space between ticks
double notch_spacing = (y_extent / tick_divisor);
// Draw in the ticks
int parity = -1;
for (double y_pos = region_y1_axis.Top; y_pos <= region_y1_axis.Bottom && notch_spacing > 0; y_pos += notch_spacing)
{
parity = -parity;
if (parity > 0 && y_pos < region_y1_axis.Bottom)
{
g.FillRectangle(brush_background_axisguide, region_chart.Left, (float)y_pos, region_chart.Width, (float)notch_spacing);
}
g.DrawLine(pen_axis_guide, region_chart.Left, (float)y_pos, region_chart.Right, (float)y_pos);
g.DrawLine(pen_axis, region_y1_axis.Right - axis_notch_height, (float)y_pos, region_y1_axis.Right, (float)y_pos);
}
// Used to make text vertical
StringFormat string_format = new StringFormat(StringFormatFlags.DirectionVertical);
// Draw in the values
int precision = Precision.estimateMeaningfulChartRoundingPrecision(max.y - min.y);
for (double y_pos = region_y1_axis.Top; y_pos <= region_y1_axis.Bottom && notch_spacing > 0; y_pos += notch_spacing)
{
double y_value = max.y - (max.y - min.y) * (y_pos - region_y1_axis.Top) / region_y1_axis.Height;
y_value = Math.Round(y_value, precision);
string y_text = "" + y_value;
SizeF y_text_size = g.MeasureString(y_text, font_axis, (int)region_y1_axis.Width, string_format);
g.DrawString(y_text, font_axis, brush_axis, region_y1_axis.Right - 5.0f - y_text_size.Width, (float)(y_pos - y_text_size.Height / 2.0), string_format);
}
// Draw in the title
SizeF y1_axis_title_text_size = g.MeasureString(y1_axis_title, font_axis, (int)region_y1_axis.Width, string_format);
g.DrawString(y1_axis_title, font_axis, brush_axis, 0, (float)(region_y1_axis.Top + (region_y1_axis.Height - y1_axis_title_text_size.Height) / 2.0), string_format);
}
void performPaintXAxis(Graphics g, ChartRegion region_chart, ChartRegion region_x_axis, Point2D min, Point2D max)
{
if (0 == this.series_list.Count)
{
return;
}
double x_extent = region_x_axis.Width;
int tick_divisor = determineTickDivisor(x_extent, axis_tick_gap_min);
// Calculate the space between ticks
double notch_spacing = (x_extent / tick_divisor);
// Draw in the ticks
for (double x_pos = region_x_axis.Left; x_pos <= region_x_axis.Right && notch_spacing > 0; x_pos += notch_spacing)
{
g.DrawLine(pen_axis_guide, (float)x_pos, region_chart.Top, (float)x_pos, region_chart.Bottom);
g.DrawLine(pen_axis, (float)x_pos, region_x_axis.Top, (float)x_pos, region_x_axis.Top + axis_notch_height);
}
// Draw in the values
int precision = Precision.estimateMeaningfulChartRoundingPrecision(max.x - min.x);
for (double x_pos = region_x_axis.Left; x_pos <= region_x_axis.Right && notch_spacing > 0; x_pos += notch_spacing)
{
double x_value = min.x + (max.x - min.x) * (x_pos - region_x_axis.Left) / region_x_axis.Width;
x_value = Math.Round(x_value, precision);
string x_text = "" + x_value;
SizeF x_text_size = g.MeasureString(x_text, font_axis);
g.DrawString(x_text, font_axis, brush_axis, (float)(x_pos - x_text_size.Width / 2.0), region_x_axis.Top + 5.0f);
}
// Draw in the axis title
SizeF x_axis_title_text_size = g.MeasureString(x_axis_title, font_axis);
g.DrawString(x_axis_title, font_axis, brush_axis, (float)(region_x_axis.Left + (region_x_axis.Width - x_axis_title_text_size.Width) / 2.0), (float)(region_x_axis.Bottom - x_axis_title_text_size.Height));
}
protected override void OnPaint(PaintEventArgs e)
{
if (series_list.Count == 0)
{
ChartTools.renderNoDatasetMessage(e.Graphics);
return;
}
ChartRegion region_fullscreen = new ChartRegion(0, 0, this.Width, this.Height);
ChartRegion region_title; ChartRegion region_title_remainder;
region_fullscreen.splitHorizontal(title_height, out region_title, out region_title_remainder);
ChartRegion region_legend; ChartRegion region_legend_remainder;
region_title_remainder.splitHorizontal(region_title_remainder.Height - legend_height, out region_legend_remainder, out region_legend);
region_legend.Top += 10;
ChartRegion region_chart; ChartRegion region_x_axis; ChartRegion region_y1_axis; ChartRegion region_y2_axis;
region_legend_remainder.splitAxes(axis_height, out region_chart, out region_x_axis, out region_y1_axis, out region_y2_axis);
Point2D min_pri; Point2D max_pri; Point2D min_sec; Point2D max_sec;
getSeriesExtents(out min_pri, out max_pri, out min_sec, out max_sec);
// Set the axis overrides
if (!double.IsNaN(x_axis_max))
{
max_pri.x = x_axis_max;
}
if (!double.IsNaN(x_axis_max))
{
max_sec.x = x_axis_max;
}
if (!double.IsNaN(x_axis_min))
{
min_pri.x = x_axis_min;
}
if (!double.IsNaN(x_axis_min))
{
min_sec.x = x_axis_min;
}
if (!double.IsNaN(y1_axis_max))
{
max_pri.y = y1_axis_max;
}
if (!double.IsNaN(y1_axis_min))
{
min_pri.y = y1_axis_min;
}
if (!double.IsNaN(y2_axis_max))
{
max_sec.y = y2_axis_max;
}
if (!double.IsNaN(y2_axis_min))
{
min_sec.y = y2_axis_min;
}
// Check that our series are beautifully coloured
for (int i_series = 0; i_series < series_list.Count; ++i_series)
{
Series series = (Series)series_list[i_series];
if (series.color == Color.Black)
{
series.color = ChartColours.getOrderedColour(i_series);
}
}
// Draw the various bits of the chart
try
{
performPaintBackground(e.Graphics, region_chart);
performPaintTitle(e.Graphics, region_title);
performPaintLegend(e.Graphics, region_legend);
if (region_chart.Height > 0 && region_chart.Width > 0)
{
performPaintXAxis(e.Graphics, region_chart, region_x_axis, min_pri, max_pri);
performPaintY1Axis(e.Graphics, region_chart, region_y1_axis, min_pri, max_pri);
performPaintY2Axis(e.Graphics, region_chart, region_y2_axis, min_sec, max_sec);
performPaintSeries(e.Graphics, region_chart, min_pri, max_pri, min_sec, max_sec);
}
performPaintBorders(e.Graphics, region_chart);
}
catch (Exception)
{
}
}
void performPaintSeries(Graphics g, ChartRegion region_chart, Point2D min_pri, Point2D max_pri, Point2D min_sec, Point2D max_sec)
{
if (0 == this.series_list.Count)
{
return;
}
for (int i_series = 0; i_series < series_list.Count; ++i_series)
{
Series series = (Series)series_list[i_series];
Point2D min = series.chartaxis == ChartAxis.Primary ? min_pri : min_sec;
Point2D max = series.chartaxis == ChartAxis.Primary ? max_pri : max_sec;
// Skip any series with bad values
if (Double.IsNaN(min.x))
{
continue;
}
if (Double.IsNaN(min.y))
{
continue;
}
if (Double.IsNaN(max.x))
{
continue;
}
if (Double.IsNaN(max.y))
{
continue;
}
pen_series.Color = series.color;
brush_series.Color = series.color;
pen_series.DashStyle = pickSeriesDashStyle(i_series, series.charttype);
if (series.charttype == ChartType.Point)
{
for (int i_point = 0; i_point < series.Count; ++i_point)
{
Point2D point = (Point2D)series[i_point];
float x_pos = (float)(region_chart.Left + region_chart.Width * (point.x - min.x) / (max.x - min.x));
float y_pos = (float)(region_chart.Bottom - region_chart.Height * (point.y - min.y) / (max.y - min.y));
renderSeriesPoint(i_series, g, pen_series, brush_series, x_pos, y_pos, point_size);
}
}
else if (series.charttype == ChartType.Line || series.charttype == ChartType.SmoothLine || series.charttype == ChartType.LineAndPoint || series.charttype == ChartType.SmoothLineAndPoint)
{
Point[] points = new Point[series.Count];
for (int i = 0; i < series.Count; ++i)
{
Point2D point = (Point2D)series[i];
float x_pos = (float)(region_chart.Left + region_chart.Width * (point.x - min.x) / (max.x - min.x));
float y_pos = (float)(region_chart.Bottom - region_chart.Height * (point.y - min.y) / (max.y - min.y));
if (series.charttype == ChartType.LineAndPoint || series.charttype == ChartType.SmoothLineAndPoint)
{
renderSeriesPoint(i_series, g, pen_series, brush_series, x_pos, y_pos, point_size);
}
points[i] = new Point((int)x_pos, (int)y_pos);
}
if (series.charttype == ChartType.Line || series.charttype == ChartType.LineAndPoint)
{
if (points.Length > 1)
{
g.DrawLines(pen_series, points);
}
}
else if (series.charttype == ChartType.SmoothLine || series.charttype == ChartType.SmoothLineAndPoint)
{
if (points.Length > 1)
{
g.DrawCurve(pen_series, points);
}
}
}
else if (series.charttype == ChartType.Bar)
{
for (int i = 0; i < series.Count; ++i)
{
Point2D point = (Point2D)series[i];
float x_pos = (float)(region_chart.Left + region_chart.Width * (point.x - min.x) / (max.x - min.x));
float y_pos = (float)(region_chart.Bottom - region_chart.Height * (point.y - min.y) / (max.y - min.y));
g.DrawLine(pen_series, x_pos, y_pos, x_pos, region_chart.Bottom);
}
}
else
{
throw new GenericException("Unknown chart type " + series.charttype);
}
}
}
void performPaintBorders(Graphics g, ChartRegion region_chart)
{
g.DrawRectangle(pen_border, region_chart.Left, region_chart.Top, region_chart.Width, region_chart.Height);
}
void performPaintTitle(Graphics g, ChartRegion region_title)
{
SizeF title_text_size = g.MeasureString(title, font_title);
g.DrawString(title, font_title, brush_title, (float)(region_title.Left + (region_title.Width - title_text_size.Width) / 2.0), (float)(region_title.Top + (region_title.Height - title_text_size.Height) / 2.0));
}
void performPaintBackground(Graphics g, ChartRegion region_chart)
{
g.FillRectangle(brush_background, region_chart.Left, region_chart.Top, region_chart.Width, region_chart.Height);
}