/// <summary>
/// Handles the Paint event of the gradientPanel control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
private void gradientPanel_Paint(object sender, PaintEventArgs e)
{
Size cs = gradientPanel.ClientSize;
int xpad = Math.Max(Math.Max(markerWidth / 2, selMarkerWidth / 2), gradientBorderSize);
int ytop = gradientBorderSize;
int dx = cs.Width - 2 * xpad;
int dy = cs.Height - 2 * gradientBorderSize - 3 - Math.Max(markerHeight, selMarkerHeight) - 2;
if (dx < 1 || dy < 1)
{
return; // too small to draw anything
}
g = e.Graphics;
Rectangle gr = new Rectangle(xpad, ytop, dx, dy);
if (gr != gradientRect)
{
ClearGradientBrush();
gradientRect = gr;
}
yMarker = ytop + dy + gradientBorderSize + 3;
AllocPensAndBrushes();
// Fill background + border with border color
if (gradientBorderSize > 0)
{
Rectangle r = Rectangle.Inflate(gr, gradientBorderSize, gradientBorderSize);
g.FillRectangle(borderBrush, r);
}
// Draw gradient
gradientBrush.FillRectangle(g, gr, backGradientBrush);
// Draw markers
if (markers == null)
{
markers = new GraphicsPath[vals.Count];
}
for (int s = 0; s < vals.Count; s++)
{
if (s != sel)
{
if (markers[s] == null)
{
markers[s] = AllocMarker(vals[s].Position);
}
DrawMarker(markers[s]);
}
}
if (selMarker == null)
{
selMarker = AllocSelMarker(vals[sel].Position);
}
DrawSelMarker(selMarker);
}
/// <summary>
/// Handles the Paint event of the this control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
private void this_Paint(object sender, PaintEventArgs e)
{
if (blend != null)
{
if (br == null)
{
br = new LinearGradientBrush2(this.ClientRectangle, blend, mode);
}
br.FillRectangle(e.Graphics, this.ClientRectangle, SystemBrushes.Window);
}
}