public override CanvasCommandList GetChartImage()
{
if (Values == null || Values.GroupCount == 0 ||
Style?.ChartType != ChartType.Line)
{
return(null);
}
var style = (LineChartStyle)Style;
var colorSpace = Style.ColorSpace.Select(ColorConverter.ConvertHexToColor).ToList();
var device = CanvasDevice.GetSharedDevice();
var commandList = new CanvasCommandList(device);
using (var session = commandList.CreateDrawingSession())
{
var titleLayout = ChartDrawHelper.CreateCanvasText(device, Values.Title, style.TitleFormat);
var titleRect = titleLayout.LayoutBounds;
if (Values.IsShowTitle)
{
session.DrawTextLayout(titleLayout, new Vector2(),
ColorConverter.ConvertHexToColor(style.TitleFormat.Foreground));
}
titleLayout.Dispose();
var maxValue = Values.Data.Select(o => o.Max()).Max();
var maxMarkerValue = (float)ValueFormatHelper.Ceiling(maxValue, 2);
var axisGeo = ChartDrawHelper.GetAxis(device, style.AxisStyle, style.DataAreaWidth, maxMarkerValue);
var axisRect = axisGeo.AxisLine.ComputeBounds();
axisRect.Union(axisGeo.AxisValueMarker.GetBounds(device));
var axisOffset =
new Point((titleRect.Width - axisRect.Width) / 2 - axisRect.X,
titleRect.Height + style.TitleFormat.Thickness.Bottom - axisRect.Y).ToVector2();
using (var axisCommandList = new CanvasCommandList(session))
{
using (var axisDrawSession = axisCommandList.CreateDrawingSession())
{
axisDrawSession.Transform = Matrix3x2.CreateTranslation(axisOffset);
axisDrawSession.DrawGeometry(axisGeo.AxisLine,
ColorConverter.ConvertHexToColor(style.AxisStyle.LineColor), style.AxisStyle.LineWidth);
axisDrawSession.FillGeometry(axisGeo.AxisArrow,
ColorConverter.ConvertHexToColor(style.AxisStyle.LineColor));
axisDrawSession.DrawImage(axisGeo.AxisValueMarker);
}
session.DrawImage(axisCommandList);
}
axisGeo.Dispose();
var maxValueHeight = maxValue / maxMarkerValue * axisGeo.DataRect.Height;
var lineGeos = GetLineChart(device, style, Values.Data, (float)maxValueHeight, style.DataAreaWidth,
style.DataLabelFormat, Style.ColorSpace);
var dataOffset = axisOffset +
new Point(axisGeo.DataRect.X, axisGeo.DataRect.Y + axisGeo.DataRect.Height)
.ToVector2();
using (var dataCommandList = new CanvasCommandList(session))
{
using (var drawSession = dataCommandList.CreateDrawingSession())
{
drawSession.Transform = Matrix3x2.CreateTranslation(dataOffset);
for (int i = 0; i < lineGeos.Count; i++)
{
drawSession.DrawGeometry(lineGeos[i].LineGeometry, colorSpace[i % colorSpace.Count],
style.LineWidth);
foreach (var dot in lineGeos[i].DotGeometries)
{
drawSession.FillGeometry(dot, colorSpace[i % colorSpace.Count]);
}
if (Values.IsShowDataValues)
{
drawSession.DrawImage(lineGeos[i].DataLabels);
}
lineGeos[i].Dispose();
}
}
session.DrawImage(dataCommandList);
}
if (Values.IsShowGroupLabels)
{
var markerPoints = new List <Vector2>();
var markerStrs = new List <string>();
var groupLength = style.DataAreaWidth / (Values.GroupCount - 1);
for (int i = 0; i < Values.GroupCount; i++)
{
var markerPoint = new Vector2(i * groupLength, 0);
markerPoints.Add(markerPoint);
markerStrs.Add(Values.GroupLabels[i]);
}
var groupLabels = ChartDrawHelper.CreateValueMarker(device, style.GroupLabelFormat, markerPoints,
markerStrs,
MarkerPosition.Bottom);
var groupLabelsOffset = axisOffset +
new Vector2(
style.AxisStyle.StartOffset, 0);
using (var dataCommandList = new CanvasCommandList(session))
{
using (var drawSession = dataCommandList.CreateDrawingSession())
{
drawSession.Transform = Matrix3x2.CreateTranslation(groupLabelsOffset);
drawSession.DrawImage(groupLabels);
}
session.DrawImage(dataCommandList);
}
groupLabels.Dispose();
}
if (Values.IsShowLegend)
{
var legendLabels = Values.LegendItemLabels.Take(Values.LegendItemCount).ToList();
var legend = ChartDrawHelper.CreateLegend(device, style.LegendStyle,
legendLabels, colorSpace, Values.LegendPosition);
var legendRect = legend.GetBounds(device);
switch (Values.LegendPosition)
{
case LegendPosition.Right:
var rightOffset =
new Point(
axisOffset.X + axisRect.Width + style.LegendStyle.Thickness.Left - legendRect.X,
axisOffset.Y - legendRect.Height - legendRect.Y)
.ToVector2();
session.DrawImage(legend, rightOffset);
break;
case LegendPosition.Bottom:
var bottomOffset =
new Point(
(titleRect.Width - legendRect.Width) / 2 - legendRect.X,
axisOffset.Y + style.LegendStyle.Thickness.Top - legendRect.Y)
.ToVector2();
session.DrawImage(legend, bottomOffset);
break;
}
legend.Dispose();
}
return(commandList);
}
}
public override CanvasCommandList GetChartImage()
{
if (Values == null || Values.GroupCount == 0 ||
Style?.ChartType != ChartType.Pie)
{
return(null);
}
var style = (PieChartStyle)Style;
var colorSpace = Style.ColorSpace.Select(ColorConverter.ConvertHexToColor).ToList();
var device = CanvasDevice.GetSharedDevice();
var commandList = new CanvasCommandList(device);
using (var session = commandList.CreateDrawingSession())
{
var geos = GetPieChart(device, Values.Data[0], style.DataLabelFormat, style.Radius,
Values.IsShowDataValues);
var titleLayout = ChartDrawHelper.CreateCanvasText(device, Values.Title, style.TitleFormat);
var titleRect = titleLayout.LayoutBounds;
if (Values.IsShowTitle)
{
session.DrawTextLayout(titleLayout, new Vector2(),
ColorConverter.ConvertHexToColor(style.TitleFormat.Foreground));
}
titleLayout.Dispose();
var diameter = style.Radius * 2 + style.BorderWidth / 2;
var pieOffset =
new Point((titleRect.Width - diameter) / 2,
titleRect.Height + style.TitleFormat.Thickness.Bottom).ToVector2();
using (var pieCommandList = new CanvasCommandList(session))
{
using (var pieDrawSession = pieCommandList.CreateDrawingSession())
{
pieDrawSession.Transform = Matrix3x2.CreateTranslation(pieOffset);
for (int i = 0; i < geos.Count; i++)
{
pieDrawSession.FillGeometry(geos[i].ShapeGeometry,
colorSpace[i % Style.ColorSpace.Count]);
}
foreach (var t in geos)
{
pieDrawSession.DrawGeometry(t.ShapeGeometry,
ColorConverter.ConvertHexToColor(style.BorderColor), style.BorderWidth,
new CanvasStrokeStyle
{
LineJoin = CanvasLineJoin.Round,
});
if (Values.IsShowDataValues)
{
pieDrawSession.FillGeometry(t.TextGeometry, (float)t.DataRect.X,
(float)t.DataRect.Y,
ColorConverter.ConvertHexToColor(style.DataLabelFormat.Foreground));
}
t.Dispose();
}
}
session.DrawImage(pieCommandList);
}
if (Values.IsShowLegend)
{
var legendLabels = Values.GroupLabels.Take(Values.GroupCount).ToList();
var legend = ChartDrawHelper.CreateLegend(device, style.LegendStyle,
legendLabels, colorSpace, Values.LegendPosition);
var legendRect = legend.GetBounds(device);
switch (Values.LegendPosition)
{
case LegendPosition.Right:
var rightOffset =
new Point(
pieOffset.X + diameter + style.LegendStyle.Thickness.Left - legendRect.X,
pieOffset.Y + (diameter - legendRect.Height) - legendRect.Y)
.ToVector2();
session.DrawImage(legend, rightOffset);
break;
case LegendPosition.Bottom:
var bottomOffset =
new Point(
(titleRect.Width - legendRect.Width) / 2 - legendRect.X,
titleRect.Height + style.TitleFormat.Thickness.Bottom +
diameter + style.LegendStyle.Thickness.Top - legendRect.Y)
.ToVector2();
session.DrawImage(legend, bottomOffset);
break;
}
legend.Dispose();
}
}
return(commandList);
}