protected override void OnPaint(PaintEventArgs e)
{
const float EXTENUATED_MOVEMENT_FACTOR = 0.6f;
e.Graphics.Clear(BackColor);
e.Graphics.CompositingMode = _compositingMode;
e.Graphics.CompositingQuality = _compositingQuality;
e.Graphics.PixelOffsetMode = _pixelOffsetMode;
e.Graphics.SmoothingMode = _smoothingMode;
e.Graphics.InterpolationMode = _interpolationMode;
base.OnPaint(e);
if (Slices?.Count < 1)
{
return;
}
var offsetAlpha = Math.Max(Math.Min((Math.Abs(Offset.X) + Math.Abs(Offset.Y)) / 25, 50), 0);
var zoomAlpha = Zoom == 0 ? 0 : Math.Min(Zoom / 10, 50);
var depthAlpha = Depth == 0 ? 0 : Math.Min(Depth / 10, 50);
var sliceAlpha = new[] { offsetAlpha, zoomAlpha, depthAlpha }.Max();
using (var sliceBackBrush = new SolidBrush(Color.FromArgb(sliceAlpha, Color.Black)))
using (var sliceBorderPen = new Pen(Color.FromArgb(20, Color.Black)))
{
var maxSliceSize = new Size(Slices.Max(l => l.Width), Slices.Max(l => l.Height));
var originLeft = (Width - maxSliceSize.Width) / 2;
var originTop = (Height - maxSliceSize.Height) / 2;
for (int i = 0; i < Slices.Count; i++)
{
var slice = Slices[i];
var offsetAffectFactor = 0.0d;
if (TwoWaySpring)
{
offsetAffectFactor = (((double)i - (double)(Slices.Count / 2)) / (double)Slices.Count * 2);
}
else
{
offsetAffectFactor = (double)i / (double)Slices.Count;
}
var zoomAffectFactor = (double)(i + 1 /* +1 makes the last slice move with the zoom as well */) / (double)Slices.Count;
if (Zoom < 0)
{
zoomAffectFactor = Zoom;
}
var depthAffectFactor = ((double)Slices.Count - (double)(i + 1)) * EXTENUATED_MOVEMENT_FACTOR / (double)Slices.Count;
var left = originLeft + (int)(offsetAffectFactor * Offset.X);
var top = originTop + (int)(offsetAffectFactor * Offset.Y);
var rect = new Rectangle(left, top, slice.Width, slice.Height);
var infateBy = (Zoom * zoomAffectFactor) - (Depth * depthAffectFactor);
var ratio = ((double)slice.Width / (double)slice.Height);
rect.Inflate((int)(infateBy * ratio), (int)(infateBy));
if (rect.Height > Height || rect.Width > Width)
{
continue;
}
e.Graphics.FillRectangle(sliceBackBrush, rect);
e.Graphics.DrawImage(slice, rect);
if (sliceAlpha > 0)
{
e.Graphics.DrawRectangle(sliceBorderPen, rect);
}
}
}
}
