/*
* Resize a sinistra in alto
*/
private void LeftTopResizeCase(SKPoint coordinatePixelDetected, MovimentInfo resizeMovimentDetected, RectangleArea rectangleArea)
{
switch (resizeMovimentDetected)
{
case MovimentInfo.OutSideLeft:
rectangleArea.Left = bitMapArea.Left;
rectangleArea.Top = coordinatePixelDetected.Y;
break;
case MovimentInfo.OverTop:
rectangleArea.Top = bitMapArea.Top;
rectangleArea.Left = coordinatePixelDetected.X;
break;
case MovimentInfo.OutSideLeftOverTop:
rectangleArea.Top = bitMapArea.Top;
rectangleArea.Left = bitMapArea.Left;
break;
case MovimentInfo.InsideArea:
rectangleArea.Left = coordinatePixelDetected.X;
rectangleArea.Top = coordinatePixelDetected.Y;
break;
}
}
/*
* Resize a destra in basso
*/
private void RightBottomResizeCase(SKPoint coordinatePixelDetected, MovimentInfo resizeMovimentDetected, RectangleArea rectangleArea)
{
switch (resizeMovimentDetected)
{
case MovimentInfo.OutSideRight:
rectangleArea.Right = bitMapArea.Right;
rectangleArea.Bottom = coordinatePixelDetected.Y;
break;
case MovimentInfo.UnderBottom:
rectangleArea.Bottom = bitMapArea.Bottom;
rectangleArea.Right = coordinatePixelDetected.X;
break;
case MovimentInfo.OutSideRightOverTop:
rectangleArea.Right = bitMapArea.Right;
rectangleArea.Bottom = bitMapArea.Bottom;
break;
case MovimentInfo.InsideArea:
rectangleArea.Right = coordinatePixelDetected.X;
rectangleArea.Bottom = coordinatePixelDetected.Y;
break;
}
}
/*
* Metodo resize bounding box con chiamata al vertice in questione
*/
private void ResizeRect(SKPoint coordinatePixelDetected, ResizeInfo resizeDetected, RectangleArea rectangleArea)
{
MovimentInfo resizeMovimentDetected = MovimentMethods.GetResizeInfo(coordinatePixelDetected.X, coordinatePixelDetected.Y,
bitMapArea.Left, bitMapArea.Top, bitMapArea.Right, bitMapArea.Bottom);
switch (resizeDetected)
{
case ResizeInfo.LeftTopAround:
LeftTopResizeCase(coordinatePixelDetected, resizeMovimentDetected, rectangleArea);
break;
case ResizeInfo.LeftBottomAround:
LeftBottomResizeCase(coordinatePixelDetected, resizeMovimentDetected, rectangleArea);
break;
case ResizeInfo.RightTopAround:
RightTopResizeCase(coordinatePixelDetected, resizeMovimentDetected, rectangleArea);
break;
case ResizeInfo.RightBottomAround:
RightBottomResizeCase(coordinatePixelDetected, resizeMovimentDetected, rectangleArea);
break;
}
rectangleArea.OffSetRectHeight = rectangleArea.Bottom - rectangleArea.Top;
rectangleArea.OffSetRectWidth = rectangleArea.Right - rectangleArea.Left;
rectangleArea.ResizeMove = true;
canvasBitMap.InvalidateSurface();
}
/*
* Metodo per la gestione del movimento del rettangolo mediante la gesture "pan" con contemplazione dei
* vari casi presenti e conseguente ricalcolo delle varie coordinate
*/
private void RectangleMoveArea(Point pointMove, RectangleArea rectangleArea)
{
SKPoint pixelMove = UtilityFunctions.ConvertToPixel(pointMove, canvasBitMap);
MovimentInfo actualMoviment = MovimentMethods.GetMovimentInfo(pixelMove.X, pixelMove.Y,
bitMapArea.Left, bitMapArea.Top, bitMapArea.Right,
bitMapArea.Bottom, rectangleArea.OffSetRectWidth, rectangleArea.OffSetRectHeight);
switch (actualMoviment)
{
case MovimentInfo.InsideArea:
rectangleArea.Bottom = pixelMove.Y + rectangleArea.OffSetRectHeight / 2;
rectangleArea.Top = rectangleArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Right = pixelMove.X + rectangleArea.OffSetRectWidth / 2;
rectangleArea.Left = rectangleArea.Right - rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideRightOverTop:
rectangleArea.Bottom = bitMapArea.Top + rectangleArea.OffSetRectHeight;
rectangleArea.Top = bitMapArea.Top;
rectangleArea.Right = bitMapArea.Right;
rectangleArea.Left = rectangleArea.Right - rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideRight:
rectangleArea.Bottom = pixelMove.Y + rectangleArea.OffSetRectHeight / 2;
rectangleArea.Top = rectangleArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Right = bitMapArea.Right;
rectangleArea.Left = rectangleArea.Right - rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideLeftOverTop:
rectangleArea.Bottom = bitMapArea.Top + rectangleArea.OffSetRectHeight;
rectangleArea.Top = bitMapArea.Top;
rectangleArea.Left = bitMapArea.Left;
rectangleArea.Right = bitMapArea.Left + rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OverTop:
rectangleArea.Bottom = bitMapArea.Top + rectangleArea.OffSetRectHeight;
rectangleArea.Top = bitMapArea.Top;
rectangleArea.Right = pixelMove.X + rectangleArea.OffSetRectWidth / 2;
rectangleArea.Left = rectangleArea.Right - rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideLeftUnderBottom:
rectangleArea.Bottom = bitMapArea.Bottom;
rectangleArea.Top = rectangleArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Left = bitMapArea.Left;
rectangleArea.Right = bitMapArea.Left + rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.UnderBottom:
rectangleArea.Bottom = bitMapArea.Bottom;
rectangleArea.Top = rectangleArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Right = pixelMove.X + rectangleArea.OffSetRectWidth / 2;
rectangleArea.Left = rectangleArea.Right - rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideLeft:
rectangleArea.Bottom = pixelMove.Y + rectangleArea.OffSetRectHeight / 2;
rectangleArea.Top = rectangleArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Left = bitMapArea.Left;
rectangleArea.Right = bitMapArea.Left + rectangleArea.OffSetRectWidth;
break;
case MovimentInfo.OutSideRightUnderBottom:
rectangleArea.Bottom = bitMapArea.Bottom;
rectangleArea.Top = bitMapArea.Bottom - rectangleArea.OffSetRectHeight;
rectangleArea.Right = bitMapArea.Right;
rectangleArea.Left = bitMapArea.Right - rectangleArea.OffSetRectWidth;
break;
}
canvasBitMap.InvalidateSurface();
}
