void OnMouseDown(object sender, MouseButtonEventArgs mouseButtonEventArgs)
{
var position = mouseButtonEventArgs.GetPosition(ImageCanvas);
if (CurrentClickPositionOnImageType == ClickPositionOnImageTypes.None)
{
return;
}
if (!AllowedRangeHelper.IsInAllowedRange(position, ImageCanvas.Width, ImageCanvas.Height, CurrentClickPositionOnImageType, ClickSequences))
{
return;
}
var matchingInList = ClickSequences.FirstOrDefault(x => x.PositionType == CurrentClickPositionOnImageType);
if (matchingInList == null)
{
throw new Exception("Click type could not be recognized.");
}
if (CurrentClickPositionOnImageType == ClickPositionOnImageTypes.RightEndOfRotatingDisc)
{
//get the left edge position
var leftEdge = ClickSequences.FirstOrDefault(x => x.PositionType == ClickPositionOnImageTypes.LeftEndOfRotatingDisc);
if (leftEdge == null)
{
throw new Exception("Left edge not found in the list.");
}
//get rotation angle to realign the left and right edges
var rotationAngleToRealign = MainProcessor.GetRotationAngleToRealign(leftEdge,
new ClickPositionOnImage
{
ClickXPos = position.X, ClickYPos = position.Y,
PositionType = ClickPositionOnImageTypes.RightEndOfRotatingDisc,
AllowedHeight = ImageCanvas.Height, AllowedWidth = ImageCanvas.Width
});
//realign the x and y positions of the ends of the disc in line with the rotated image
var newRightEdgePosition = RotationHelper.GetRotatedPosition(rotationAngleToRealign, position);
if (newRightEdgePosition == null || !(0 <= newRightEdgePosition.Value.X && newRightEdgePosition.Value.X < ImageCanvas.Width) ||
!(0 <= newRightEdgePosition.Value.Y && newRightEdgePosition.Value.Y < ImageCanvas.Height))
{
MessageBox.Show("Either the selection of the top left and right corners of the disc is wrong or the disc in the photo is in too much slanting.");
return;
}
var leftEdgePositionBeforeRotation = new Point(leftEdge.ClickXPos, leftEdge.ClickYPos);
var newLeftEdgePosition = RotationHelper.GetRotatedPosition(rotationAngleToRealign, leftEdgePositionBeforeRotation);
if (newLeftEdgePosition == null || !(0 <= newLeftEdgePosition.Value.X && newLeftEdgePosition.Value.X < ImageCanvas.Width) ||
!(0 <= newLeftEdgePosition.Value.Y && newLeftEdgePosition.Value.Y < ImageCanvas.Height))
{
MessageBox.Show("Either the selection of the top left and right corners of the disc is wrong or the disc in the photo is in too much slanting.");
return;
}
_rotationAngleToRealign = rotationAngleToRealign;
_leftEdgePositionBeforeRotation = leftEdgePositionBeforeRotation;
//the dimensions of the _currentImage and the image canvas are the same so rotation will work right
var rotatedImg = MainProcessor.RotateImg(_currentImage, (float)_rotationAngleToRealign, _bkColor);
ImageCanvas.SetImage(rotatedImg);
//set the realigned click positions for top left edge and top right edge
SetClickPositions(newRightEdgePosition.Value, matchingInList);
SetClickPositions(newLeftEdgePosition.Value, leftEdge);
//update left edge display
ImageCanvas.RemoveDisplayObject(DisplayMarkerNames.LeftEndOfRotatingDisc);
MarkPositionOnCanvas(newLeftEdgePosition.Value, ClickPositionOnImageTypes.LeftEndOfRotatingDisc);
//update right edge display
MarkPositionOnCanvas(newRightEdgePosition.Value, CurrentClickPositionOnImageType);
}
else
{
SetClickPositions(position, matchingInList);
MarkPositionOnCanvas(position, CurrentClickPositionOnImageType);
}
SetNextClickPositionType();
}