protected void PaintOnGraphicsBitmap(IGraphics g, int width, int height)
{
if (backBuffer == null || scatterPlot == null)
{
return;
}
UnsafeBitmap copyBackBuffer = new UnsafeBitmap(backBuffer);
copyBackBuffer.LockBitmap();
// selected data-points
foreach (int s in scatterPlot.Selection)
{
double[] w = scatterPlot.GetDataAt(s);
if (w.Length > 0)
{
double x = w[0];
double y = w[1];
SymbolProperties gx = GetPointProperties != null?GetPointProperties(s) : defaultSymbol;
SymbolType symbolType = SymbolType.allSymbols[gx.Type];
int symbolSize = gx.Size;
if (symbolSize > 0)
{
int[] pathX;
int[] pathY;
symbolType.GetPath(symbolSize, out pathX, out pathY);
copyBackBuffer.DrawPath(SelectionColor, ModelToViewX(x, width), ModelToViewY(y, height), pathX, pathY);
}
}
}
copyBackBuffer.UnlockBitmap();
// labels
ScatterPlotLabelMode labelMode = scatterPlot.GetLabelMode();
bool cutLabels = scatterPlot.CutLabels;
if (labelMode == ScatterPlotLabelMode.All && scatterPlot.HasLabels)
{
Font font = new Font("Arial", scatterPlot.FontSize, scatterPlot.FontStyle);
for (;;)
{
double[] x;
double[] y;
double[] z;
string[] labels;
int index;
try{
scatterPlot.GetData(out x, out y, out z, out labels, out index);
} catch (IndexOutOfRangeException) {
break;
}
if (x == null)
{
break;
}
SymbolProperties gx = GetPointProperties != null?GetPointProperties(index) : defaultSymbol;
for (int i = 0; i < x.Length; i++)
{
if (labelMode == ScatterPlotLabelMode.All || scatterPlot.IsSelected(i))
{
int ix = ModelToViewX(x[i], width);
int iy = ModelToViewY(y[i], height);
Color c;
if (z != null && colorScale != null)
{
c = colorScale.GetColor(z[i]);
}
else
{
c = gx.Color;
}
Brush b = new SolidBrush(c);
if (ix >= 0 && iy >= 0 && ix < width && iy < height)
{
if (labels[i] != null)
{
string s = labels[i];
if (cutLabels)
{
if (s.Contains(";"))
{
s = s.Substring(0, s.IndexOf(';'));
}
}
copyBackBuffer.DrawString(s, font, b, ix, iy);
}
}
}
}
}
scatterPlot.Reset();
}
if (labelMode == ScatterPlotLabelMode.Selected && scatterPlot.HasLabels)
{
Brush br = new SolidBrush(SelectionColor);
Font font = new Font("Arial", scatterPlot.FontSize, scatterPlot.FontStyle);
foreach (int s in scatterPlot.Selection)
{
double[] w = scatterPlot.GetDataAt(s);
string label = scatterPlot.GetLabelAt(s);
double x = w[0];
double y = w[1];
int ix = ModelToViewX(x, width);
int iy = ModelToViewY(y, height);
if (ix >= 0 && iy >= 0 && ix < width && iy < height)
{
if (label != null)
{
if (cutLabels)
{
if (label.Contains(";"))
{
label = label.Substring(0, label.IndexOf(';'));
}
}
copyBackBuffer.DrawString(label, font, br, ix, iy);
}
}
}
}
// draw the image
g.DrawImageUnscaled(copyBackBuffer.Bitmap, 0, 0);
copyBackBuffer.Dispose();
g.SmoothingMode = SmoothingMode.AntiAlias;
DrawPolygons(g, width, height);
if (drawFunctions != null)
{
drawFunctions(g, width, height, ModelToViewX, ModelToViewY, ViewToModelX, ViewToModelY);
}
g.SmoothingMode = SmoothingMode.Default;
}
