/// <summary>
/// Draw a horizontal or vertical cursor on the display in a dimension-
/// agnostic fashion.
/// </summary>
/// <param name="e">
/// The paint event arguments, including clipping information and
/// a graphics object.
/// </param>
/// <param name="dim">The dimension of the cursor being drawn.</param>
void DrawCursor(PaintEventArgs e, DisplayDimension dim)
{
System.Drawing.Point curOnDisplay =
PointToClient(Cursor.Position),
curPix = dim.TransposePoint(curOnDisplay);
e.Graphics.DrawLine(
cursorPen,
dim.TransposePointF(new PointF(curPix.X, 0)),
dim.TransposePointF(new PointF(curPix.X, dim.PanelPixels.Y)));
double curUnitX = dim.PixelToUnit(curPix.X);
SIValue curUnit = dim.SeriesDim.GetNewSIValue();
curUnit.Value = curUnitX;
PointF textPos = dim.TransposePointF(
new PointF(curPix.X - 20, curPix.Y + 10));
e.Graphics.DrawString(curUnit.ToString(),
axisTextFont, axisTextBrush,
textPos, dim.StringFormat);
double?yintersect = dim.Intersect(curPix.X);
if (yintersect != null)
{
PointF foundPos = new PointF(curPix.X,
dim.Orth.UnitToPixel(yintersect ?? 0));
textPos = foundPos;
textPos.X += 10;
textPos = dim.TransposePointF(textPos);
SIValue orthsi = dim.Orth.SeriesDim.GetNewSIValue();
orthsi.Value = yintersect ?? 0;
PointF crossPos1 = foundPos,
crossPos2 = foundPos;
crossPos1.X -= 5;
crossPos2.X += 5;
crossPos1 = dim.TransposePointF(crossPos1);
crossPos2 = dim.TransposePointF(crossPos2);
e.Graphics.DrawString(orthsi.ToString(), axisTextFont,
axisTextBrush, textPos, dim.Orth.StringFormat);
e.Graphics.DrawLine(cursorPen,
crossPos1, crossPos2);
}
}
/// <summary>
/// Draw a grid in a dimension-agnostic fashion (ie. this is reused for
/// both horizontal and vertical grids).
/// </summary>
/// <param name="e">
/// The paint event arguments, including clipping information and
/// a graphics object.
/// </param>
/// <param name="dim">The dimension of the grid being drawn.</param>
void DrawGrid(PaintEventArgs e, DisplayDimension dim)
{
SIValue si = dim.SeriesDim.GetNewSIValue();
dim.IterateGrid((pixel1, unit, drawText) =>
{
PointF first = dim.TransposePointF(new PointF(pixel1, 0)),
second = dim.TransposePointF(new PointF(pixel1, dim.PanelPixels.Y));
e.Graphics.DrawLine(gridPen, first, second);
if (drawText)
{
si.Value = unit;
e.Graphics.DrawString(si.ToString(),
axisTextFont, axisTextBrush, first, dim.StringFormat);
}
});
}