/* 绘制游标
*/
protected virtual void _DrawCursors(Graphics g, Point pt)
{
for (int ijk = 0; ijk < _Curves.Count; ++ijk)
{
ChartCurve1V cc = _Curves[ijk];
Dictionary <int, ChartCursor1V> cc_cursors = cc._ChartCursors1V;
ChartCursor1V cursor = _GetNearestPtCursor(pt.X, cc_cursors);
if (cursor != null)
{
g.FillEllipse(_OutlinePtBrush, cursor.Pt_x - _CURSOR_HALF_SIDE, cursor.Pt_y - _CURSOR_HALF_SIDE, _CURSOR_HALF_SIDE << 1, _CURSOR_HALF_SIDE << 1);
string info = "";
if (CursorFormat == null)
{
StringBuilder sb = new StringBuilder();
sb.Append("X:").Append(XAxisValueFormat.Format(cursor.YIndex * cc.Delta));
if (!string.IsNullOrEmpty(XAxisUnitName))
{
sb.Append("(").Append(XAxisUnitName).Append(")");
}
sb.Append("Y:").Append(cc.YAxisValueFormat.Format(cursor.Y_max));
if (!string.IsNullOrEmpty(cc.YAxisUnitName))
{
sb.Append("(").Append(cc.YAxisUnitName).Append(")");
}
sb.Append("\r\n");
info = sb.ToString();
sb.Clear();
}
else
{
info = CursorFormat.Format <int>(cursor.YIndex);
}
if (!string.IsNullOrEmpty(info))
{
_DrawCursor(g, info, new Point(cursor.Pt_x, cursor.Pt_y), cc.Pen, _AxesFont, cc.Brush, _DragRectBrush, _DestImage.Width, _DestImage.Height);
}
}
}
}
/* 绘制单条曲线
*/
protected virtual void _DrawSingleCurve(Graphics g, int width, int height, ChartCurve1V cc)
{
Rectangle rect_grid = _GetGridRect(width, height);
int chart_width = rect_grid.Width;
int chart_height = rect_grid.Height;
List <Point> pts = new List <Point>();
List <float> data_y = cc.YAxisData;
if (data_y.Count < 2)
{
return;
}
cc._ChartCursors1V.Clear();
int start_index, stop_index;
cc.GetYAxisStartStopIndex(_XAxisMinValueUsed, _XAxisMaxValueUsed, out start_index, out stop_index);
float y_axis_max, y_axis_min;
if (YAxisCombined)
{
y_axis_max = _YAxisMaxValueUsed;
y_axis_min = _YAxisMinValueUsed;
}
else
{
y_axis_max = cc.YAxisMaxValueUsed;
y_axis_min = cc.YAxisMinValueUsed;
}
for (int i = start_index; i <= stop_index && i < data_y.Count; ++i)
{
float x_v = i * cc.Delta;
int pt_x = rect_grid.X + _GetXAxisPos(x_v, _XAxisMaxValueUsed, _XAxisMinValueUsed, rect_grid.Width);
float y_v = data_y[i];
int pt_y = rect_grid.Y + _GetYAxisPos(y_v, y_axis_max, y_axis_min, rect_grid.Height);
pts.Add(new Point(pt_x, pt_y));
ChartCursor1V cursor = new ChartCursor1V
{
Pt_x = pt_x,
Pt_y = pt_y,
YValue = y_v,
Pt_count = 1,
Y_max = y_v,
Y_min = y_v,
YIndex = i,
};
if (!cc._ChartCursors1V.Keys.Contains(pt_x))
{
cc._ChartCursors1V.Add(pt_x, cursor);
}
else
{
ChartCursor1V cursor_exist = cc._ChartCursors1V[pt_x];
cursor_exist.Pt_count++;
cursor_exist.Y_max = (cursor_exist.Y_max >= y_v ? cursor_exist.Y_max : y_v);
cursor_exist.Y_min = (cursor_exist.Y_min <= y_v ? cursor_exist.Y_min : y_v);
}
}
if (pts.Count > 1)
{
g.DrawLines(cc.Pen, pts.ToArray());
if (pts.Count < rect_grid.Width / 2)
{
Rectangle r = new Rectangle();
r.Width = 4;
r.Height = 4;
pts.ForEach((Point pt) =>
{
r.X = pt.X - 2;
r.Y = pt.Y - 2;
g.DrawRectangle(cc.Pen, r);
});
}
}
else if (pts.Count == 1)
{
g.DrawRectangle(cc.Pen, new Rectangle(pts[0].X - 2, pts[0].Y - 2, 4, 4));
}
}
