// TODO: Needs 'DrawSelectBox(…)`
// We also need implementation strategy for drawing a select-box that can be applied to widgets universally.
static public void DrawSelectBox(this Graphics graphics, Widget widget, FloatRect lim = null, Color?colour = null)
{
if (widget.Parent.MouseM == null || widget.Parent.MouseD == null)
{
return;
}
Func <Point, Point> p2c = widget.Parent.PointToClient;
var state = graphics.Save();
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
var c1 = colour ?? DefaultSelectBoxColour;
var c2 = Color.FromArgb(64, c1); // with alpha
// find the closest x
FloatPoint p0 = p2c(widget.Parent.MouseD.Nearest(widget.Parent.MouseM));
FloatPoint p1 = p2c(widget.Parent.MouseD.Furthest(widget.Parent.MouseM));
FloatPoint pA = p0.Smallest(p1);
FloatPoint pB = p0.Largest(p1);
if (lim != null)
{
pA = pA.Limit(lim.Location, lim.BottomRight);
pB = pB.Limit(lim.Location, lim.BottomRight);
pB = pB - pA;
}
FloatRect rect = new FloatRect(pA, pB);
using (var p = new Pen(c1, 1))
using (var b = new SolidBrush(c2))
{
graphics.DrawRectangle(p, rect);
graphics.FillRectangle(b, rect);
}
graphics.Restore(state);
}
