void Draw()
{
if (pixmap == null)
{
return;
}
Style style = Style;
StateType state = Sensitive ? StateType.Normal : StateType.Insensitive;
if (width <= 0 || height <= 0)
{
return;
}
//clear the pixmap
GtkBeans.Style.PaintFlatBox(style, pixmap, StateType.Normal, ShadowType.None, null, this, "curve_bg", 0, 0, Allocation.Width, Allocation.Height);
//draw the grid lines
for (int i = 0; i < 5; i++)
{
pixmap.DrawLine(style.DarkGC(state),
x_offset,
i * (int)(height / 4.0) + y_offset,
width + x_offset,
i * (int)(height / 4.0) + y_offset);
pixmap.DrawLine(style.DarkGC(state),
i * (int)(width / 4.0) + x_offset,
y_offset,
i * (int)(width / 4.0) + x_offset,
height + y_offset);
}
//draw the curve
pixmap.DrawPoints(style.ForegroundGC(state), Interpolate(width, height));
//draw the bullets
if (CurveType != CurveType.Free)
{
foreach (var keyval in points)
{
if (keyval.Key < MinX)
{
continue;
}
int x = Project(keyval.Key, MinX, MaxX, width);
int y = height - Project(keyval.Value, MinY, MaxY, height);
pixmap.DrawArc(style.ForegroundGC(state), true, x, y, radius * 2, radius * 2, 0, 360 * 64);
}
}
GdkWindow.DrawDrawable(style.ForegroundGC(state), pixmap, 0, 0, 0, 0, Allocation.Width, Allocation.Height);
}
