private WriteableBitmap GetCropImage()
{
WriteableBitmap wb = ImgDetail.Source as WriteableBitmap;
WriteableBitmap nwb = BitmapFactory.New((int)ResolutionHelper.CurrentResolution.Width, (int)ResolutionHelper.CurrentResolution.Height);
double wr = wb.PixelWidth / ResolutionHelper.CurrentResolution.Width;
GeneralTransform gtf = ImgFrame.TransformToVisual(ImgDetail);
Rect rt = gtf.TransformBounds(
new Rect(innerRect.X,
innerRect.Y,
innerRect.Width,
innerRect.Height));
//원본에서 축소된 비율 (화면 로딩 초기 렌더링된 값)
double cr = wb.PixelWidth / ImgDetail.ActualWidth;
double tx = wb.PixelWidth / innerRect.Width;
Rect dstRect = new Rect(0, 0, nwb.PixelWidth, nwb.PixelHeight);
Rect srcRect = new Rect(rt.X * cr, rt.Y * cr, rt.Width * cr, rt.Height * cr);
//복사된 마이너스 영역을 배경색으로 덧칠
nwb.Blit(dstRect, wb, srcRect, WriteableBitmapExtensions.BlendMode.Additive);
//왼쪽 영역이 모자라면 검정색 배경으로 칠함
if (0 < (int)((-rt.X * tx / wr) * transform.ScaleX) && 0 < nwb.PixelHeight)
{
nwb.FillRectangle(0, 0, (int)((-rt.X * tx / wr) * transform.ScaleX), nwb.PixelHeight, Colors.Black);
}
//오른쪽 영역이 모자라면 검정색 배경으로 칠함
double right = (ImgDetail.ActualWidth - rt.X) * nwb.PixelWidth / innerRect.Width * transform.ScaleX;
if ((int)(right) < nwb.PixelWidth && 0 < nwb.PixelHeight)
{
nwb.FillRectangle((int)(right), 0, nwb.PixelWidth, nwb.PixelHeight, Colors.Black);
}
//상단 영역이 모자라면 검정색 배경으로 칠함
if (0 < (int)((-rt.Y * tx / wr) * transform.ScaleY))
{
nwb.FillRectangle(0, 0, nwb.PixelWidth, (int)((-rt.Y * tx / wr) * transform.ScaleY), Colors.Black);
}
//하단 영역이 모자라면 검정색 배경으로 칠함
double bottom = (ImgDetail.ActualHeight - rt.Y) * nwb.PixelHeight / innerRect.Height * transform.ScaleY;
if ((int)(bottom) < nwb.PixelHeight && 0 < nwb.PixelWidth)
{
nwb.FillRectangle(0, (int)(bottom), nwb.PixelWidth, nwb.PixelHeight, Colors.Black);
}
return(nwb);
}
void BrdFrame_ManipulationDelta(object sender, System.Windows.Input.ManipulationDeltaEventArgs e)
{
if (e.PinchManipulation == null)
{
//Drag
double horizontalChange = e.DeltaManipulation.Translation.X;
double verticalChange = e.DeltaManipulation.Translation.Y;
//좌측으로
if (horizontalChange < 0 && protectDirection != DragDirection.Left)
{
transform.TranslateX += horizontalChange;
transform.TranslateY += verticalChange;
protectDirection = DragDirection.None;
}
//우측으로
else if (horizontalChange > 0 && protectDirection != DragDirection.Right)
{
transform.TranslateX += horizontalChange;
transform.TranslateY += verticalChange;
protectDirection = DragDirection.None;
}
else if (verticalChange < 0 && protectDirection != DragDirection.Top)
{
//위로
transform.TranslateX += horizontalChange;
transform.TranslateY += verticalChange;
protectDirection = DragDirection.None;
}
else if (verticalChange > 0 && protectDirection != DragDirection.Bottom)
{
//아래로
transform.TranslateX += horizontalChange;
transform.TranslateY += verticalChange;
protectDirection = DragDirection.None;
}
else
{
return;
}
//일단 움직이면 축소 가능하도록 설정
canZoomOut = true;
GeneralTransform gtf = ImgDetail.TransformToVisual(ImgFrame);
Point pt = gtf.Transform(new Point(ImgDetail.ActualWidth, ImgDetail.ActualHeight));
//좌측선
if (pt.X < innerRect.Left)
{
transform.TranslateX += innerRect.Left - pt.X;
protectDirection = DragDirection.Left;
canZoomOut = false;
}
//상단선
if (pt.Y < innerRect.Top)
{
transform.TranslateY += innerRect.Top - pt.Y;
protectDirection = DragDirection.Top;
canZoomOut = false;
}
gtf = ImgFrame.TransformToVisual(ImgDetail);
pt = gtf.Transform(new Point(innerRect.Left + innerRect.Width, innerRect.Top + innerRect.Height));
//우측선
if (pt.X < 0)
{
transform.TranslateX += pt.X;
protectDirection = DragDirection.Right;
canZoomOut = false;
}
//하단선
if (pt.Y < 0)
{
transform.TranslateY += pt.Y;
protectDirection = DragDirection.Bottom;
canZoomOut = false;
}
}
else
{
//Pinch
double distanceRatio = e.PinchManipulation.CumulativeScale;
Size scale = new Size(currentScale.X * distanceRatio, currentScale.Y * distanceRatio);
bool isZoomIn = scale.Width > transform.ScaleX;
if (isZoomIn)
{
canZoomOut = true;
protectDirection = DragDirection.None;
}
if (scale.Width <= SCALE_MAX && (canZoomOut || isZoomIn))
{
//축소일때 최소영역보다 이하이면 축소하지 않음
if (ImgDetail.ActualWidth * scale.Width >= innerRect.Width / 2 &&
ImgDetail.ActualHeight * scale.Height >= innerRect.Height / 2)
{
transform.ScaleX = scale.Width;
transform.ScaleY = scale.Height;
Point inPoint = new Point(innerRect.Left + innerRect.Width, innerRect.Top + innerRect.Height);
CompensationPinch(distanceRatio, ImgFrame, ImgDetail, inPoint, 0, true);
CompensationPinch(distanceRatio, ImgFrame, ImgDetail, inPoint, 0, false);
inPoint = new Point(ImgDetail.ActualWidth, ImgDetail.ActualHeight);
CompensationPinch(distanceRatio, ImgDetail, ImgFrame, inPoint, innerRect.Left, true);
CompensationPinch(distanceRatio, ImgDetail, ImgFrame, inPoint, innerRect.Top, false);
}
}
}
}