// Renders the Range Control's viewport.
void IRangeControlClient.DrawContent(RangeControlPaintEventArgs e)
{
Rectangle rect = e.ContentBounds;
rect.Inflate(0, -3);
rect.Height -= ((IRangeControlClient)this).RangeBoxBottomIndent;
DrawZeroLine(e, rect);
DrawGraph(e, rect);
}
protected virtual void DrawZeroLine(RangeControlPaintEventArgs e, Rectangle contentBounds)
{
double zeroLine = (double)(MaxValue - 0) / (MaxValue - MinValue);
if (zeroLine < 0.0 || zeroLine >= 1.0f)
{
return;
}
int y = (int)(contentBounds.Y + zeroLine * contentBounds.Height);
e.Graphics.DrawLine(Pens.Gray, new Point(contentBounds.X, y), new Point(contentBounds.Right, y));
}
protected virtual void DrawGraph(RangeControlPaintEventArgs e, Rectangle contentBounds)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
int start = Math.Max(0, (int)(e.RangeControl.VisibleRangeStartPosition * BarCount) - 2);
int end = Math.Min(Data.Length, start + ((int)(e.RangeControl.VisibleRangeWidth * BarCount) + 4));
Point?prevPoint = null;
using (Pen pen = new Pen(Color.Blue, 1)) {
for (int i = start; i < end; i++)
{
int y = contentBounds.Y + contentBounds.Height - (int)((double)(Data[i] - MinValue) / (MaxValue - MinValue) * contentBounds.Height);
int x = e.CalcX((double)i / BarCount);
if (prevPoint.HasValue)
{
e.Cache.DrawLine(new Point(prevPoint.Value.X, prevPoint.Value.Y), new Point(x, y), Color.Blue, 1);
}
prevPoint = new Point(x, y);
}
}
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;
}
void IRangeControlClient.DrawContent(RangeControlPaintEventArgs e) {
DrawGraph(e.Graphics, e.ContentBounds);
}
bool IRangeControlClient.DrawRuler(RangeControlPaintEventArgs e) {
return false;
}
void IRangeControlClient.DrawSelection(RangeControlPaintEventArgs e)
{
}
Rectangle IRangeControlClient.CalculateSelectionBounds(RangeControlPaintEventArgs e, Rectangle rect)
{
return(rect);
}
//TODO
public void DrawSelection(RangeControlPaintEventArgs e)
{
;
}
// Return true if the Client draws the ruler itself.
bool IRangeControlClient.DrawRuler(RangeControlPaintEventArgs e)
{
return(false);
}
//TODO
public Rectangle CalculateSelectionBounds(RangeControlPaintEventArgs e, Rectangle rect)
{
return(rect);
}
void IRangeControlClient.DrawContent(RangeControlPaintEventArgs e)
{
DrawGraph(e.Cache, e.ContentBounds);
}
Rectangle IRangeControlClient.CalculateSelectionBounds(RangeControlPaintEventArgs e, Rectangle rect) => RangeControlClient.CalculateSelectionBounds(e, rect);
bool IRangeControlClient.DrawRuler(RangeControlPaintEventArgs e) => RangeControlClient.DrawRuler(e);
void IRangeControlClient.DrawContent(RangeControlPaintEventArgs e) => RangeControlClient.DrawContent(e);
