internal void ShiftImageAndUpdateRest(IPainter painter, IndexedImage canvas, Point imageStartPoint, Size shiftDelta)
{
var pixelShift = new Size(shiftDelta.Width * CellSize, shiftDelta.Height * CellSize);
ImageShifter.ShiftPixels(canvas, -pixelShift.Width, -pixelShift.Height);
if (shiftDelta.Height != 0)
{
if (shiftDelta.Height < 0) // Shifting down - repaint rows at top
{
using (painter.Clip(new Rectangle(0, 0, canvas.Size.Width, RulerWidth - pixelShift.Height)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
}
else // Shifting up - repaint rows at bottom
{
using (painter.Clip(new Rectangle(0, canvas.Size.Height - pixelShift.Height, canvas.Size.Width, pixelShift.Height)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
if (ShowRulers)
{
using (painter.Clip(new Rectangle(0, 0, canvas.Size.Width, RulerWidth)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
}
}
}
if (shiftDelta.Width != 0)
{
if (shiftDelta.Width < 0) // Shifting right - repaint columns at left
{
using (painter.Clip(new Rectangle(0, 0, RulerWidth - pixelShift.Width, canvas.Size.Height)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
}
else // Shift left - repaint columns at right
{
using (painter.Clip(new Rectangle(canvas.Size.Width - pixelShift.Width, 0, pixelShift.Width, canvas.Size.Height)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
if (ShowRulers)
{
using (painter.Clip(new Rectangle(0, 0, RulerWidth, canvas.Size.Height)))
{
Paint(painter, canvas.Size, painter.ClipRect, imageStartPoint);
}
}
}
}
}